1
|
Fotovat F, Abbasi S, Nikanjam S, Alafchi B, Baghiat M. Effects of various disinfectants on surface roughness and color stability of thermoset and 3D-printed acrylic resin. Eur J Transl Myol 2024; 34:11701. [PMID: 38247390 PMCID: PMC11017172 DOI: 10.4081/ejtm.2024.11701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Accepted: 01/02/2024] [Indexed: 01/23/2024] Open
Abstract
Denture cleansers are extensively utilized to inhibit the colonization of various Candida species. Currently, additive technology in denture fabrication has become more prevalent. This study aims to assess the impact of disinfectants on the surface roughness and color stability of distinct denture bases. Disc-shaped samples (N=66) were exposed to three different disinfectants: 0.5% sodium hypochlorite, 1% hydrogen peroxide, and 2% chlorhexidine. The samples underwent evaluation via spectrophotometry and profilometry, respectively. Data analysis was conducted utilizing analysis of variance (ANOVA) (p < 0.05). Within the heat-cured group, sodium hypochlorite resulted in the most notable change in surface roughness (0.2 μm), while chlorhexidine exhibited the least impact (0.001 μm), showing a significant difference (p <0.008). The color change (ΔE) for 3D-printed samples immersed in all disinfectants was higher compared to heat-cured samples. Among the heat-cured samples, chlorhexidine induced the highest ΔE (2.76), while sodium hypochlorite resulted in the lowest (ΔE = 1.44), and this difference was statistically significant (p <0.008). Chlorhexidine caused the most significant color alteration among the solutions, while sodium hypochlorite induced the most considerable changes in surface roughness.
Collapse
Affiliation(s)
- Farnoush Fotovat
- Department of Prosthodontics, School of Dentistry, Dental Research Center, Hamadan University of Medical Sciences, Hamadan.
| | - Samaneh Abbasi
- Department of Prosthodontics, School of Dentistry, Hamadan University of Medical Sciences, Hamadan.
| | - Saeed Nikanjam
- Department of Prosthodontics, School of Dentistry, Dental Research Center, Hamadan University of Medical Sciences, Hamadan.
| | - Behnaz Alafchi
- Modeling of noncommunicable diseases research center, Hamadan University of Medical Sciences, Hamadan.
| | - Mandana Baghiat
- School of Dentistry, Hamadan University of Medical Sciences, Hamadan.
| |
Collapse
|
2
|
Jain S, Adawi H. Effect of Effervescent Denture Cleansers on 3D Surface Roughness of Conventional Heat Polymerized, Subtractively, and Additively Manufactured Denture Base Resins: An In Vitro Study. J Prosthodont 2023; 32:244-252. [PMID: 35445773 DOI: 10.1111/jopr.13525] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Accepted: 04/05/2022] [Indexed: 11/30/2022] Open
Abstract
PURPOSE To compare the change in surface roughness of denture bases fabricated using three different techniques (additive manufacturing, subtractive manufacturing, and conventional heat-polymerizing) when immersed in two commonly available denture cleansers. MATERIALS AND METHODS One hundred and seventeen disc-shaped denture base specimens (39/group), were fabricated by subtractive manufacturing (Wieland), additive manufacturing (NextDent Denture 3D+), and conventional heat-polymerizing (Meliodent) techniques, following the manufacturers' instructions. Specimens were randomly divided into 3 groups and immersed in two effervescent denture cleansing solutions and distilled water to simulate 180 days of denture cleansing. A 3D optical noncontact surface profilometer was used to record the surface roughness of the tested denture base materials before and after immersion. Two-way ANOVA, followed by Bonferroni post hoc test, was used to assess the effects of denture cleansers on surface roughness of tested denture base resins. RESULTS When immersed in Fixodent and Fittydent effervescent denture cleansing solutions, the highest change in absolute surface roughness (∆Sa, in μm) was observed in additively manufactured denture base material (0.181 ±0.018 and 0.079 ±0.008), followed by heat-polymerized denture base material (0.149 ±0.012 and 0.059 ± 0.011), while subtractively manufactured denture base material showed the least change (0.110 ±0.026 and 0.038 ±0.007), respectively. There was a difference in the extent of change in surface roughness between the denture cleansers. The change in surface roughness was much higher with the Fixodent denture cleanser as compared to the Fittydent denture cleanser. CONCLUSION Subtractively manufactured denture base resin displayed the lowest change while additively manufactured denture base resin displayed the highest change in surface roughness in both denture cleansers, but the extent of change in surface roughness was variable.
Collapse
Affiliation(s)
- Saurabh Jain
- Department of Prosthetic Dental Sciences, College of Dentistry, Jazan University, Jazan, Saudi Arabia
| | - Hafiz Adawi
- Department of Prosthetic Dental Sciences, College of Dentistry, Jazan University, Jazan, Saudi Arabia
| |
Collapse
|
3
|
Mugri MH, Jain S, Sayed ME, Halawi AHA, Hamzi SAI, Aljohani RAS, Madkhali ZMA, Khalid A, Jokhadar HF, Almarzouki M, Alhumaidan GA, Alshahrani AA, Alqahtani SM, Alqahtani NM, Lunkad H. Effects of Smokeless Tobacco on Color Stability and Surface Roughness of 3D-Printed, CAD/CAM-Milled, and Conventional Denture Base Materials: An In Vitro Study. Biomedicines 2023; 11:biomedicines11020491. [PMID: 36831026 PMCID: PMC9953001 DOI: 10.3390/biomedicines11020491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 01/27/2023] [Accepted: 01/27/2023] [Indexed: 02/11/2023] Open
Abstract
Tobacco consumption in its different forms can affect the optical and surface properties of dental materials that are used in the oral cavity. Thus, the present study was conducted to evaluate the effects of two commercially available smokeless tobacco products on the color stability and surface roughness of denture base resins that were fabricated using three different techniques (CAD/CAM milling, 3D printing, and conventional heat polymerization). A total of 126 denture base resin specimens were fabricated using the three different manufacturing techniques (n = 42 each). Specimens from each group were further subdivided into three subgroups (n = 14 each) and immersed in three different immersion media (a khaini suspension, a tabbaq suspension, and artificial saliva). The differences in color and surface roughness were assessed according to data that were collected and statistically analyzed using SPSS version 24.0. The tabbaq smokeless tobacco was found to cause greatest changes in color and surface roughness; the effect was observed to be highest in the 3D-printed specimens followed by the conventional heat-polymerized and CAD/CAM milled specimens. The mean changes in color and surface roughness were the highest for the tabbaq smokeless tobacco followed by the khaini smokeless tobacco and the artificial saliva. Statistically significant (p-value < 0.05) differences were observed among all techniques and suspensions. We concluded that the mean changes in color and surface roughness were significantly higher for the 3D-printed dentures compared to the conventional heat-polymerized and CAD/CAM-milled dentures. Thus, the results of the present study strengthened the concept that tobacco in any form can lead to changes in the color and surface roughness of denture base materials.
Collapse
Affiliation(s)
- Maryam H. Mugri
- Department of Maxillofacial and Diagnostic Sciences, College of Dentistry, Jazan University, Jazan 45142, Saudi Arabia
| | - Saurabh Jain
- Department of Prosthetic Dental Sciences, College of Dentistry, Jazan University, Jazan 45142, Saudi Arabia
- Correspondence: (S.J.); (M.E.S.)
| | - Mohammed E. Sayed
- Department of Prosthetic Dental Sciences, College of Dentistry, Jazan University, Jazan 45142, Saudi Arabia
- Rutgers School of Dental Medicine, Rutgers University, Newark, NJ 07103, USA
- Correspondence: (S.J.); (M.E.S.)
| | | | | | | | | | - Asaad Khalid
- Substance Abuse and Toxicology Research Center, Jazan University, Jazan 45142, Saudi Arabia
- Medicinal and Aromatic Plants and Traditional Medicine Research Institute, National Center for Research, Khartoum 11111, Sudan
| | - Hossam F. Jokhadar
- Department of Oral and Maxillofacial Prosthodontics, Faculty of Dentistry, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Mai Almarzouki
- Department of Operative Dentistry, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | | | - Ahid Amer Alshahrani
- Department of Dental Technology, Applied Medical Science, King Khalid University, Abha 62529, Saudi Arabia
| | - Saeed M. Alqahtani
- Department of Prosthetic Dentistry, College of Dentistry, King Khalid University, Abha 62529, Saudi Arabia
| | - Nasser M. Alqahtani
- Department of Prosthodontics, College of Dentistry, King Khalid University, Abha 62529, Saudi Arabia
| | - Honey Lunkad
- Department of Prosthetic Dental Sciences, College of Dentistry, Jazan University, Jazan 45142, Saudi Arabia
| |
Collapse
|
4
|
Afrasiabi S, Chiniforush N. Antibacterial potential of riboflavin mediated blue diode laser photodynamic inactivation against Enterococcus faecalis: A laboratory investigation. Photodiagnosis Photodyn Ther 2023; 41:103291. [PMID: 36642284 DOI: 10.1016/j.pdpdt.2023.103291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 01/11/2023] [Accepted: 01/11/2023] [Indexed: 01/15/2023]
Abstract
OBJECTIVES This study aimed to evaluate the inactivation potency of riboflavin-mediated blue diode laser photodynamic inactivation (PDI) against Enterococcus faecalis at planktonic and biofilm stages and also investigated its effect on the tooth color change. MATERIALS AND METHODS The antibacterial and antibiofilm activities of riboflavin mediated PDI against E. faecalis were investigated. The numbers of colony-forming units (CFUs)/mL were calculated. Teeth discoloration were evaluated using the CIE L*a*b* based color difference (ΔE). RESULTS Antibacterial analysis indicated that the blue diode laser irradiation at 12, 18, 24, and 30 J/cm2 alone and different concentrations of riboflavin solution (6.25 to 100 μM) reduced the number of CFU/mL of E. faecalis, but the reduction was not statistically significant (P > 0.05). Depending on the riboflavin concentration and the light dose, there can be as much as a 1-log effect on CFU/mL. In addition, E. faecalis biofilm was more affected with 30 J/cm2 irradiation dosage and 100 μM riboflavin than other groups. Meanwhile, bacterial suspensions treated with 5.25% sodium hypochlorite (NaOCl) showed maximum biofilm inhibition and colony number reduction, compared with the control. The teeth exhibited clinically acceptable color change after riboflavin treatment at concentration ranging from 6.25 to 50 μM (ΔE < 3.7). CONCLUSIONS The riboflavin mediated PDI process is somewhat less effective than NaOCl but perhaps less toxic to tissues. It might be feasible to repeat the riboflavin + light treatment to further promote efficacy.
Collapse
Affiliation(s)
- Shima Afrasiabi
- Laser Research Center of Dentistry, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Nasim Chiniforush
- Laser Research Center of Dentistry, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran.
| |
Collapse
|
5
|
Physical and Mechanical Properties of 3D-Printed Provisional Crowns and Fixed Dental Prosthesis Resins Compared to CAD/CAM Milled and Conventional Provisional Resins: A Systematic Review and Meta-Analysis. Polymers (Basel) 2022; 14:polym14132691. [PMID: 35808735 PMCID: PMC9269394 DOI: 10.3390/polym14132691] [Citation(s) in RCA: 38] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Revised: 06/23/2022] [Accepted: 06/28/2022] [Indexed: 02/04/2023] Open
Abstract
Newly introduced provisional crowns and fixed dental prostheses (FDP) materials should exhibit good physical and mechanical properties necessary to serve the purpose of their fabrication. The aim of this systematic literature review and meta-analysis is to evaluate the articles comparing the physical and mechanical properties of 3D-printed provisional crown and FDP resin materials with CAD/CAM (Computer-Aided Designing/Computer-Aided Manufacturing) milled and conventional provisional resins. Indexed English literature up to April 2022 was systematically searched for articles using the following electronic databases: MEDLINE-PubMed, Web of Science (core collection), Scopus, and the Cochrane library. This systematic review was structured based on the guidelines given by the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA). The focused PICO/PECO (Participant, Intervention/exposure, Comparison, Outcome) question was: ‘Do 3D-printed (P) provisional crowns and FDPs (I) have similar physical and mechanical properties (O) when compared to CAD/CAM milled and other conventionally fabricated ones (C)’. Out of eight hundred and ninety-six titles, which were recognized after a primary search, twenty-five articles were included in the qualitative analysis, and their quality analysis was performed using the modified CONSORT scale. Due to the heterogeneity of the studies, only twelve articles were included for quantitative analysis. Within the limitations of this study, it can be concluded that 3D-printed provisional crown and FDP resin materials have superior mechanical properties but inferior physical properties compared to CAD/CAM milled and other conventionally fabricated ones. Three-dimensionally printed provisional crowns and FDP materials can be used as an alternative to conventional and CAD/CAM milled long-term provisional materials.
Collapse
|
6
|
Alhotan A, Elraggal A, Yates J, Haider J, Jurado CA, Silikas N. Effect of Different Solutions on the Colour Stability of Nanoparticles or Fibre Reinforced PMMA. Polymers (Basel) 2022; 14:polym14081521. [PMID: 35458269 PMCID: PMC9028232 DOI: 10.3390/polym14081521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Revised: 04/01/2022] [Accepted: 04/06/2022] [Indexed: 11/16/2022] Open
Abstract
This study aimed to evaluate the colour stability of polymethyl methacrylate (PMMA) denture base reinforced with ZrO2 nanoparticles, E-glass fibres, and TiO2 nanoparticles at various concentrations over 180-day storage in Steradent™ (STD) denture cleaner or coffee (CF). A total of 130 disc-shaped specimens were fabricated at various filler concentrations and divided into four main groups to measure the colour changes. Groups Z, T, and E consisted of PMMA reinforced with ZrO2 nanoparticles, TiO2 nanoparticles, or E-glass fibre, respectively, while Group C consisted of PMMA specimens without filler served as the control group (n = 10). The three reinforced groups were further subdivided according to the filler content (n = 10) added to the PMMA (1.5%, 3.0%, 5.0%, and 7.0% wt.%). Half of the specimens were stored in STD, while the other half was stored in CF for 180 days. A Minolta Chroma Meter was used to measure the colour changes (ΔE) at 7, 30, 90 and then 180 days. The results were assessed using two-way repeated-measures analysis of variance (RM-ANOVA) along with Bonferroni post hoc tests at a p ≤ 0.05 significance level. Significant different colour changes (ΔΕ) were observed between all tested groups and across different time points. TiO2-reinforced PMMA in coffee showed the lowest colour stability, while the E-glass fibre-reinforced PMMA in STD/CF showed the highest colour stability. Furthermore, coffee appeared to have the greatest impact on the CF change in comparison to the STD/CF. The results indicated that the filler type and concentration, type of solution, and length of storage all affected the colour stability of the tested specimens.
Collapse
Affiliation(s)
- Abdulaziz Alhotan
- Division of Dentistry, School of Medical Sciences, University of Manchester, Manchester M13 9PL, UK; (J.Y.); (J.H.); (N.S.)
- Dental Health Department, College of Applied Medical Sciences, King Saud University, Riyadh 11454, Saudi Arabia
- Correspondence:
| | - Alaaeldin Elraggal
- Conservative Dentistry Department, Faculty of Dentistry, Alexandria University, Alexandria 21568, Egypt;
| | - Julian Yates
- Division of Dentistry, School of Medical Sciences, University of Manchester, Manchester M13 9PL, UK; (J.Y.); (J.H.); (N.S.)
| | - Julfikar Haider
- Division of Dentistry, School of Medical Sciences, University of Manchester, Manchester M13 9PL, UK; (J.Y.); (J.H.); (N.S.)
- Department of Engineering, Manchester Metropolitan University, Manchester M1 5GD, UK
| | - Carlos Alberto Jurado
- Woody L. Hunt School of Dental Medicine, Texas Tech University Health Sciences Centre El Paso, 5001 El Paso Drive, El Paso, TX 79905, USA;
| | - Nikolaos Silikas
- Division of Dentistry, School of Medical Sciences, University of Manchester, Manchester M13 9PL, UK; (J.Y.); (J.H.); (N.S.)
| |
Collapse
|
7
|
Richa G, Reddy KM, Shastry YM, Aditya SV, Babu PJK. Effectiveness of denture cleansers on flexible denture base resins in the removal of stains colored by food colorant solution: An in vitro study. J Indian Prosthodont Soc 2022; 22:288-293. [PMID: 36511060 PMCID: PMC9416950 DOI: 10.4103/jips.jips_480_21] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Aim The aim of the study was to compare the efficiency of three denture cleansers (Valclean, Polident and Clinsodent) in removal of turmeric stains from flexible denture base resins. Settings and Design In vitro - comparative study. Materials and Methods A total of 45 specimens of flexible denture base resins were fabricated and subjected to baseline colour measurements using spectrophotometer. Specimens were stained with turmeric and colour measurements of stained specimens were made. All the stained specimens were divided into three groups (n = 15) for removal of stains with three denture cleansers: Valclean, Polident, Clinsodent and colour measurements of cleansed specimens were made. The colour measurements (ΔE) values obtained were collected and statistical analysis was done. Statistical Analysis Used One-way ANOVA (Analysis of Variance), Tukey's post hoc test. Results One way ANOVA test revealed that the mean colour difference of three groups were statistically different with P value < 0.001. A further Tukey post hoc test revealed that the Valclean group had lesser mean scores than Polident and Clinsodent group. Conclusion It was concluded that Valclean showed statistically significant greater stain removal efficiency than Polident followed by Clinsodent.
Collapse
Affiliation(s)
- Gujrathi Richa
- Department of Prosthodontics, Sri Sai College of Dental Surgery, Vikarabad, Telangana, India,Address for correspondence: Dr. Gujrathi Richa, Amsri Central Court, B Block-704, Old Lancer Lines, Near Srikara Hospital, Railway Colony, Chilakalguda, Secunderabad - 500 025, Telangana, India. E-mail:
| | - K. Mahendranadh Reddy
- Department of Prosthodontics, Sri Sai College of Dental Surgery, Vikarabad, Telangana, India
| | - Y. Mahadev Shastry
- Department of Prosthodontics, Sri Sai College of Dental Surgery, Vikarabad, Telangana, India
| | - S. Venkat Aditya
- Department of Prosthodontics, Sri Sai College of Dental Surgery, Vikarabad, Telangana, India
| | - P. Jaya Krishna Babu
- Department of Prosthodontics, Sri Sai College of Dental Surgery, Vikarabad, Telangana, India
| |
Collapse
|
8
|
Vaddamanu SK, Vyas R, Pati SK, Thakkar R, Kumar A, Badiyani BK. Effect of Food Colorants on Color of Denture Base Acrylic Resins. JOURNAL OF PHARMACY AND BIOALLIED SCIENCES 2021; 13:S664-S666. [PMID: 34447176 PMCID: PMC8375942 DOI: 10.4103/jpbs.jpbs_759_20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2020] [Accepted: 11/24/2020] [Indexed: 11/25/2022] Open
Abstract
Background: Acrylic resin has been successfully used for complete denture fabrication for many years. Color stability is very crucial clinical properties for dental materials, and color change may be an indicator of aging or damaging of materials. Aim and Objectives: This study has been designed to determine the color stability of heat cure denture base acrylic resins in commonly consumed solutions causing stains. Methodology: Four hundred disc samples of four commercially used heat cure denture base resins (Trevalon®, DPI®, Veracril®, and Pyrax®) were fabricated (100 in each group). These were checked for any change in optical density by immersing them in four different staining solutions (tea, coffee, turmeric, and betel leaf, i.e., paan) and synthetic saliva for 1-month synthetic saliva was taken as control. The denture cleansers were also evaluated for their efficacy determined by their ability to remove the stains caused by the staining solutions. Results: It was observed that Trevalon® showed least change in optical density and coffee illustrated the maximum potential for staining the denture base resins and is the most difficult to be removed using a denture cleanser. Conclusion: It can be concluded that Trevalon® demonstrated maximum color stability. Among the staining solutions, coffee caused maximum stains.
Collapse
Affiliation(s)
- Sunil Kumar Vaddamanu
- Department of Dental Technology, College of Applied Medical Sciences, King Khalid University, Abha, Saudi Arabia
| | - Rajesh Vyas
- Department of Dental Technology, College of Applied Medical Sciences, King Khalid University, Abha, Saudi Arabia
| | - Sourav Kumar Pati
- Department of Prosthodontics and Crown and Bridge, Kalinga Institute of Dental Sciences, Bhubaneswar, Odisha, India
| | - Radhika Thakkar
- University of Rochester Medical Center, Eastman Institute for Oral Health, Rochester, New York, USA
| | - Amit Kumar
- Reader, Department of Public Health Dentistry, Clinical Practitioner, Mumbai, Maharashtra, India
| | - Bhumika Kamal Badiyani
- Reader, Department of Public Health Dentistry, Clinical Practitioner, Mumbai, Maharashtra, India
| |
Collapse
|
9
|
Coutinho CA, Hegde D, Sanjeevan V, Coutinho IF, Priya A. Comparative evaluation of color stability of three commercially available provisional restorative materials: An in vitro study. J Indian Prosthodont Soc 2021; 21:161-166. [PMID: 33938865 PMCID: PMC8262438 DOI: 10.4103/jips.jips_622_20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Aim: Esthetics of the provisional restorations is of prime importance to the patients especially in long term in the esthetic zone. Discolouration of these restorations may result in patient dissatisfaction and an additional expense for their replacement. LuxaCrown provisional material being new in market and claimed to be semi-permanent by the company needs to be evaluated for its colour stability. This in vitro study was aimed to evaluate and compare the colour stability of three provisional restorations using three pigmented solutions. Setting and Design: In vitro - comparative study. Materials and Methods: LuxaCrown, Protemp4, Heat cure PMMA were evaluated. 40 specimens of each material were divided into four groups of ten specimens each. Each group was stored in three staining solutions and artificial saliva. Colour values of each specimen were measured before immersion, after one day, one week, one month, three months and six months with a spectrophotometer. Stastistical Analysis Used: One way ANOVA, Post Hoc Tukey Test, Bonferonni Test. Results: Least colour change was seen in Heat Cure PMMA followed by Protemp4 and highest colour change was seen in LuxaCrown when immersed in artificial saliva, tea and coffee. Whereas in turmeric, Heat Cure PMMA showed the least colour change followed by LuxaCrown and highest colour change was seen in Protemp4 at all time intervals except day one, where LuxaCrown was higher than Protemp4. Conclusion: Heat cure showed the best results as compared to Protemp4 and LuxaCrown in terms of colour stability at all time periods.
Collapse
Affiliation(s)
- Cora Abigail Coutinho
- Department of Prosthodontics, Bangalore Institute of Dental Sciences and Research Centre, Bengaluru, Karnataka, India
| | - Divya Hegde
- Department of Prosthodontics, Bangalore Institute of Dental Sciences and Research Centre, Bengaluru, Karnataka, India
| | - Vinita Sanjeevan
- Department of Public Health Dentistry, Goa Dental College and Hospital, Goa, India
| | | | - Akansha Priya
- Department of Prosthodontics, Bangalore Institute of Dental Sciences and Research Centre, Bengaluru, Karnataka, India
| |
Collapse
|
10
|
An In-Vitro Study to Evaluate the Effect of Denture Cleansing Agents on Color Stability of Denture Bases Fabricated Using CAD/CAM Milling, 3D-Printing and Conventional Techniques. COATINGS 2021. [DOI: 10.3390/coatings11080962] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The current literature lacks substantial information about the effect of denture cleansers on the color stability of denture bases formed using Computer-Aided Design/Computer-Aided Manufacturing (CAD/CAM) additive and CAD/CAM subtractive manufacturing techniques. This study aimed to assess the effect of two commercially available denture cleansers on the color stability of denture base resins fabricated using four different techniques. Forty-five disc-shaped specimens were fabricated using each technique. Initial color readings were recorded. Specimens were randomly divided into three subgroups (n = 15): a control group (distilled water) and two denture cleanser groups. They were immersed in these solutions, simulating 180 days of use. Final color readings were recorded. The color difference was calculated, and the data were statistically analyzed. For all the specimens, significant color changes were observed after immersion in denture cleanser solutions. The extent of color change varied according to the type of denture cleanser used. When placed in the denture cleanser solutions, the CAD/CAM subtractive group showed the maximum color change (−1.10 and −0.72), while the CAD/CAM additive (3D printing) groups showed the least color change (−0.48 and −0.54). Clinicians should choose appropriate denture cleansers for newly introduced denture base resins to minimize the changes in the color of the dentures.
Collapse
|
11
|
Alfouzan AF, Alotiabi HM, Labban N, Al-Otaibi HN, Al Taweel SM, AlShehri HA. Color stability of 3D-printed denture resins: effect of aging, mechanical brushing and immersion in staining medium. J Adv Prosthodont 2021; 13:160-171. [PMID: 34234926 PMCID: PMC8250187 DOI: 10.4047/jap.2021.13.3.160] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 06/09/2021] [Accepted: 06/14/2021] [Indexed: 01/25/2023] Open
Abstract
PURPOSE This in-vitro study evaluated and compared the color stability of 3D-printed and conventional heat-polymerized acrylic resins following aging, mechanical brushing, and immersion in staining medium. MATERIALS AND METHODS Forty disc-shaped specimens (10 mm in diameter and 3 mm thick) were prepared from two 3D-printed [DentaBASE (DB) and Denture 3D+ (D3D)] and one conventional polymethylmethacrylate (PMMA) denture materials. The specimens were thermo-cycled, subjected to mechanical brushing, and were immersed in either coffee, lemon juice, coke, or artificial saliva (AS) to simulate one and two years of oral use. Color measurements of the specimens were recorded by a spectrophotometer at baseline (T0), and after one (T1) and two years (T2) of simulation. The color changes (∆E) were determined and also quantified according to the National Bureau of Standards (NBS) units. Descriptive statistics, followed by factorial ANOVA and Bonferroni post-hoc test (α=.05), were applied for data analysis. RESULTS The independent factors, namely material, staining medium, and immersion time, and interaction among these factors significantly influenced ∆E (P<.009). Irrespective of the materials, treatments, and time, the highest and the lowest mean ∆Es were observed for PMMA in lemon juice (4.58 ± 1.30) and DB in AS (0.41 ± 0.18), respectively. Regarding the material type, PMMA demonstrated the highest mean ∆E (2.31 ± 1.37), followed by D3D (1.67 ± 0.66), and DB (0.85 ± 0.52), and the difference in ∆E between the materials were statistically significant (P<.001). All the specimens demonstrated a decreased color changes at T2 compared to T1, and this difference in mean ∆E was statistically significant (P<.001). CONCLUSION The color changes of 3D-printed denture resins were low compared to conventional heat polymerized PMMA. All the tested materials, irrespective of the staining medium used, demonstrated a significant decrease in ∆E values over time.
Collapse
Affiliation(s)
- Afnan Fouzan Alfouzan
- Department of Prosthetic Dental Sciences, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
| | - Hadeel Minife Alotiabi
- College of Dentistry, King Saud Bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
| | - Nawaf Labban
- Department of Prosthetic Dental Sciences, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
| | - Hanan Nejer Al-Otaibi
- Department of Prosthetic Dental Sciences, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
| | - Sara Mohammad Al Taweel
- Department of Prosthetic Dental Sciences, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
| | - Huda Ahmed AlShehri
- College of Dentistry, King Saud Bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
| |
Collapse
|
12
|
Motayagheni R, Ebrahim Adhami Z, Taghizadeh Motlagh SM, Mehrara F, Yasamineh N. Color changes of three different brands of acrylic teeth in removable dentures in three different beverages: An in vitro study. J Dent Res Dent Clin Dent Prospects 2021; 14:159-165. [PMID: 33408820 PMCID: PMC7770398 DOI: 10.34172/joddd.2020.034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Accepted: 07/05/2020] [Indexed: 11/09/2022] Open
Abstract
Background. The best prosthetic appliances exhibit a high level of similarity to the lost organ. Color should exhibit favorable stability, as a critical factor in the esthetic appearance of dental prostheses and materials used in fabricating prostheses. The present in vitro study was undertaken to evaluate color changes of three different brands of acrylic resin teeth in three different beverages.
Methods. In this in vitro study, 10 samples from each brand of acrylic resin tooth (Ivoclar, Italy; BStar, Iran; and BetaDent, Iran) were immersed in the following beverages for one week: tea, orange juice, natural carrot juice, and distilled water (control). The color parameters were measured using the spectrophotometry technique before and after immersion, and changes were calculated. The same procedures were carried out with the same number of samples at 30-day interval. Data were analyzed with multivariate ANOVA and post hoc Tukey tests.
Results. After seven days, Ivoclar and BStar brands exhibited the minimum (1.78) and maximum (3.39) color changes, respectively (P<0.05). At the 30-day interval, the Ivoclar and BetaDent brands exhibited the minimum (3.03) and maximum (4.27) color changes, respectively (P<0.05). At the 7-day interval, carrot juice, orange juice and tea, in descending order, caused the maximum and minimum color changes. At the 30-day interval, carrot juice resulted in maximum color changes (P<0.05); orange juice, and tea caused similar color changes (P>0.05).
Conclusion. Different beverages resulted in color changes with different patterns in different brands of acrylic resin teeth. Overall, the Ivoclar brand exhibited less color changes compared to BStar and BetaDent brands. In the first week, all the three brands and in 30 days, Ivoclar and BStar brands exhibited clinically acceptable color changes.
Collapse
Affiliation(s)
- Roza Motayagheni
- Department of Prosthodontics, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Zia Ebrahim Adhami
- Department of Pediatrics, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz,Iran
| | | | | | - Neda Yasamineh
- Dental and Periodontal Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| |
Collapse
|
13
|
Ozyilmaz OY, Kara O, Akin C. Evaluation of various denture cleansers on color stability and surface topography of polyetherketoneketone, polyamide, and polymethylmethacrylate. Microsc Res Tech 2020; 84:3-11. [PMID: 32757255 DOI: 10.1002/jemt.23558] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2020] [Revised: 06/27/2020] [Accepted: 07/07/2020] [Indexed: 11/08/2022]
Abstract
The aim of this study was to evaluate the effect of sodium perborate effervescent tablets and citric acid solution on the color stability and surface topography of a new generation of high-performance polymer polyetherketoneketone (PEKK), thermoinjection-molded polyamide, and polymethylmethacrylate (PMMA). Fifty disc-shaped specimens were fabricated (10 mm × 2 mm) from PEKK (P group), polyamide (D group), and PMMA (M group). These groups were divided into five subgroups (n = 10) according to the storage media. The test groups were immersed in the following solutions: distilled water (Control), Corega, Protefix, Perlodent, and Curaprox. The color stability values (ΔE) were measured using a spectrophotometer before and after immersion in distilled water and four different denture cleansers for 8 hr/day for 140 days. Topography alterations after treatments were assessed with scanning electron microscopy (SEM). Data were analyzed by one-way analysis of variance (ANOVA) followed by Tukey's Honest Significant Difference test. The p < .05 was considered significant. All denture cleansers increased the ΔE values relative to the baseline values in the M, D, and P groups (p < .05). The Perlodent denture cleanser demonstrated the highest ΔE value in all groups, which was unacceptable. Curaprox denture cleanser showed the lowest ΔE value in the M and D groups (p < .05). Curaprox in all groups showed a ∆E value less than 3.7. For patients who have PEKK- and polyamide-based prosthesis, the use of citric acid-based cleansers may be more recommended than sodium perborate-containing cleansers because of its clinically acceptable color changes on polymers in terms of color stability.
Collapse
Affiliation(s)
- Ozgun Yusuf Ozyilmaz
- Department of Prosthodontics, Faculty of Dentistry, Bezmialem Vakif University, Istanbul, Turkey
| | - Ozlem Kara
- Department of Prosthodontics, Faculty of Dentistry, Bezmialem Vakif University, Istanbul, Turkey
| | - Ceyda Akin
- Department of Prosthodontics, Faculty of Dentistry, Necmettin Erbakan University, Konya, Turkey
| |
Collapse
|
14
|
Banu F, Jeyapalan K, V AK, Modi K. Comparison of Colour Stability Between Various Denture Base Resins on Staining and Denture Cleansing Using Commercially Available Denture Cleansers. Cureus 2020; 12:e6698. [PMID: 32117650 PMCID: PMC7029828 DOI: 10.7759/cureus.6698] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Statement of problem Discoloration of denture base materials on routine usage has been one of the common esthetic problems encountered by patients. Aim To determine the color stability of three different denture base materials upon staining with beverages and denture cleansing using commercially available denture cleansers. Materials and method Three denture base materials were used for the study, processed according to the manufacturer’s recommendation, and cut into 40 study samples measuring approximately 1 cm x 1 cm with 1 mm thickness. The samples were divided into two groups, Group A and Group B, and spectrophotometric analysis of all samples was done to evaluate the base value of the color for comparative analysis. Group A was immersed in coffee and Group B was immersed in cola and color change was noted after 12 hours and then after 24 hours. The samples were then cleansed using a denture cleanser and analyzed again. All values were tabulated and statistically analyzed. Result On descriptive statistical analysis, polymethylmethacrylate (PMMA) had higher ∆E values at 12 hrs after immersion in coffee and cola; after 24 hrs, high impact PMMA had higher ∆E values in coffee and PMMA in cola. Two-way analysis of variance (ANOVA) analysis showed no statistically significant difference for the samples immersed in coffee, whereas samples immersed in cola at the end of 24 hrs showed a significant statistical difference. Conclusion Thermoplastic resin was the least staining denture base material when compared to conventional PMMA and high-impact PMMA when immersed in coffee and cola. There was no significant difference in the cleanability of all three-denture base materials.
Collapse
Affiliation(s)
- Fathima Banu
- Prosthodontics, Faculty of Dental Sciences, Sri Ramachandra Institute of Higher Education and Research, Chennai, IND
| | - Karthigeyan Jeyapalan
- Prosthodontics, Faculty of Dental Sciences, Sri Ramachandra Institute of Higher Education and Research, Chennai, IND
| | - Anand Kumar V
- Prosthodontics, Faculty of Dental Sciences, Sri Ramachandra Institute of Higher Education and Research, Chennai, IND
| | - Kajal Modi
- Dentistry, Faculty of Dental Sciences, Sri Ramachandra Institute of Higher Education and Research, Chennai, IND
| |
Collapse
|
15
|
Koh ES, Cha HS, Kim TH, Ahn JS, Lee JH. Color stability of three dimensional-printed denture teeth exposed to various colorants. ACTA ACUST UNITED AC 2020. [DOI: 10.4047/jkap.2020.58.1.1] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Eun-Sol Koh
- Division of Prosthodontics, Department of Dentistry, Asan Medical Center, Seoul, Republic of Korea
| | - Hyun-Suk Cha
- Division of Prosthodontics, Department of Dentistry, Asan Medical Center, College of Medicine, University of Ulsan, Seoul, Republic of Korea
| | - Tae-Hyung Kim
- Division of Restorative Sciences, Herman Ostow School of Dentistry of University of Southern California, Los Angeles, CA, USA
| | - Jin-Soo Ahn
- Department of Dental Biomaterials Science and Dental Research Institute, School of Dentistry, Seoul National University, Republic of Korea
| | - Joo-Hee Lee
- Division of Prosthodontics, Department of Dentistry, Asan Medical Center, College of Medicine, University of Ulsan, Seoul, Republic of Korea
| |
Collapse
|
16
|
Afrasiabi S, Pourhajibagher M, Chiniforush N, Aminian M, Bahador A. Anti-biofilm and anti-metabolic effects of antimicrobial photodynamic therapy using chlorophyllin-phycocyanin mixture against Streptococcus mutans in experimental biofilm caries model on enamel slabs. Photodiagnosis Photodyn Ther 2019; 29:101620. [PMID: 31841686 DOI: 10.1016/j.pdpdt.2019.101620] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Revised: 11/27/2019] [Accepted: 12/05/2019] [Indexed: 01/11/2023]
Abstract
BACKGROUND Partial (selective) removal of dental caries is a suitable manner to treat deep carious lesions in vital teeth with asymptomatic pulps. Antimicrobial photodynamic therapy (aPDT) was proposed as a promising ancillary approach for reduction of the residual bacteria from the cavity. Therefore, the focus of this study was to investigate the influence of aPDT using diode laser (DL) plus PhotoActive+ (chlorophyllin-phycocyanin mixture [CHL-PC]) as photosensitizer (PS) on metabolic activity and the reduction in the number of living bacteria within the preformed biofilm caries model on enamel slabs of Streptococcus mutans. MATERIALS AND METHODS The lethal and sub-significant inhibitory (SSI) potential of aPDT using CHL-PC and 635 nm DL against experimental biofilm caries model on enamel slabs and metabolic activity of S. mutans was analyzed using crystal violet and XTT reduction assays, respectively. Intracellular ROS formation by DCFH-DA assay was measured in CHL-PC mediated aPDT treated bacterial samples. Tooth discoloration and cell cytotoxicity of CHL-PC were assessed in the CIEL*a*b* color space and neutral red assay, respectively. RESULTS In this study aPDT at a maximum concentration level of CHL-PC (5000 μg/mL) with 3 min DL irradiation time (103.12 J/cm2) reduced the ex-vivo cariogenic biofilm of S. mutans by 36.93 % (P < 0.05). Although chlorhexidine (CHX) had an anti-biofilm effect about 1.7 fold compared to CHL-PC mediated aPDT, this difference was not significant (36.93 in comparison to 63.05 %; P > 0.05). CHL-PC mediated aPDT demonstrated a significant reduction in bacterial metabolic activity, with rates of 77 % at a SSI dose (using 156 μg/mL of CHL-PC and 3 min DL irradiation time with the energy density of 103.12 J/cm2). The treated bacterial cells exhibited significant (P < 0.05) increment in the ROS generation. The least color change (ΔE) was found using CHL-PC at a concentration of 156 μg/mL (ΔE = 2.74). CHL-PC in different concentrations showed no significant reduction in human gingival fibroblasts (HGFs) cell survival (P > 0.05). CONCLUSION CHL-PC mediated aPDT not only reduces the number of living bacteria within the biofilms of S. mutans in an experimental biofilm caries model on enamel slabs but also its influences microbial virulence by reducing the metabolic activity of the S. mutants.
Collapse
Affiliation(s)
- Shima Afrasiabi
- Department of Microbiology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Maryam Pourhajibagher
- Dental Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran.
| | - Nasim Chiniforush
- Laser Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Mahdi Aminian
- Department of Clinical Biochemistry, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Abbas Bahador
- Oral Microbiology Laboratory, Department of Microbiology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran.
| |
Collapse
|
17
|
Bitencourt SB, Kanda RY, de Freitas Jorge C, Barão VAR, Sukotjo C, Wee AG, Goiato MC, Pesqueira AA. Long-term stainability of interim prosthetic materials in acidic/staining solutions. J ESTHET RESTOR DENT 2019; 32:73-80. [PMID: 31709728 DOI: 10.1111/jerd.12544] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Revised: 10/09/2019] [Accepted: 10/21/2019] [Indexed: 11/29/2022]
Abstract
OBJECTIVE To evaluate the long-term color stainability, translucency, and contrast ratio (CR) of different resins used to fabricate interim prostheses after immersion in acidic/staining solutions. MATERIALS AND METHODS A total of 160 specimens were divided into 16 groups (n = 10) according to the material (heat-polymerized acrylic resin [HPAR], auto-polymerized acrylic resin [APR], nanoparticulated bis-acrylic resin [BR], and prefabricated poly(methyl methacrylate) block for CAD/CAM [CADR]) and immersion solutions (artificial saliva, cola beverage, coffee, and red wine). A spectrophotometer was used before and after each immersion period (7, 14, 28, 90, and 180 days). Color differences (CIEDE2000 and CIELab) were calculated. A three-way repeated-measures analysis of variance and Bonferroni test (α = .05) were used. RESULTS After 180 days, the APR presented the highest value for coffee and the CADR presented the smallest value for the cola (P < .001). For the CR, the highest values were obtained at 180 days for BR in coffee (1.35) and wine (1.18) (P < .001). Higher translucency parameters were obtained in the BR and CADR in the initial, 14, 28, and 90 days (P < .001). CONCLUSIONS From the greatest to the smallest staining potential, the solutions were classified as: wine > coffee > cola beverage > saliva, while for the materials as: APR > BR > HPAR > CADR. CLINICAL SIGNIFICANCE The knowledge of the long-term optical behavior of interim prosthetic materials is important for clinicians to decide which material to use to match the dietary intake of their patients and their esthetic demands. Prefabricated blocks for CAD/CAM systems have been shown to maintaining their optical characteristics even after a long period of immersion in acidic/staining solutions.
Collapse
Affiliation(s)
- Sandro B Bitencourt
- Department of Dental Materials and Prosthodontics, Aracatuba Dental School, Sao Paulo State University (UNESP), Sao Paulo, Brazil
| | - Roberta Y Kanda
- Department of Dental Materials and Prosthodontics, Aracatuba Dental School, Sao Paulo State University (UNESP), Sao Paulo, Brazil
| | - Caroline de Freitas Jorge
- Department of Dental Materials and Prosthodontics, Aracatuba Dental School, Sao Paulo State University (UNESP), Sao Paulo, Brazil
| | - Valentim A R Barão
- Department of Prosthodontics and Periodontology, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, Sao Paulo, Brazil
| | - Cortino Sukotjo
- Department of Restorative Dentistry, University of Illinois at Chicago, College of Dentistry, Chicago, Illinois
| | - Alvin G Wee
- Division of Prosthodontics, Department of Restorative Sciences, School of Dentistry, University of Minnesota, Minneapolis, Minnesota
| | - Marcelo C Goiato
- Department of Dental Materials and Prosthodontics, Aracatuba Dental School, Sao Paulo State University (UNESP), Sao Paulo, Brazil
| | - Aldiéris A Pesqueira
- Department of Dental Materials and Prosthodontics, Aracatuba Dental School, Sao Paulo State University (UNESP), Sao Paulo, Brazil
| |
Collapse
|
18
|
Ozyilmaz OY, Akin C. Effect of cleansers on denture base resins’ structural properties. J Appl Biomater Funct Mater 2019; 17:2280800019827797. [DOI: 10.1177/2280800019827797] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Introduction: We assessed the effect of different available denture cleansers on the roughness and hardness of polyetherketoneketone, thermoinjection-molded polyamide, and polymethylmethacrylate. Materials and Methods: A total of 150 disc-shaped specimens were fabricated (10 mm × 2 mm) from these three denture base resins, and divided into five subgroups ( n = 10) according to immersion procedures. One of these groups subjected to distilled water served as control, whereas other groups were subjected to daily cleansing with four denture cleansers (Corega, Protefix, Curaprox, and Perlodent) for 8 h a day for 140 days. The surface roughness and hardness values of specimens were recorded by measuring twice at baseline, and again after application of chemical solutions. Topography alterations after treatments were assessed with scanning electron microscopy. The data were subjected to statistical analysis and comparison among groups was done using Kruskal Wallis and Wilcoxon Signed Ranks tests. P-value <0.05 was considered significant. Results: The surface roughness of polyetherketoneketone, polymethylmethacrylate, and polyamide dentures was increased significantly by chemical solutions of denture cleansers. While the hardness value of polyetherketoneketone was not affected significantly after immersion in denture cleansers, those of polymethylmethacrylate and polyamide decreased significantly. Compared with Curaprox, the effervescent tablets significantly altered the surface hardness and roughness of polyamide. Conclusion: Denture cleansers can considerably alter the surface roughness and hardness of denture base resins and should be used carefully depending on the material.
Collapse
Affiliation(s)
- Ozgun Yusuf Ozyilmaz
- Department of Prosthodontics, Faculty of Dentistry, Bezmialem Vakif University, Fatih, Istanbul, Turkey
| | - Ceyda Akin
- Department of Prosthodontics, Faculty of Dentistry, Necmettin Erbakan University, Karatay, Konya, Turkey
| |
Collapse
|
19
|
Polychronakis N, Polyzois G, Lagouvardos P, Andreopoulos A, Ngo HC. Long-term microwaving of denture base materials: effects on dimensional, color and translucency stability. J Appl Oral Sci 2018; 26:e20170536. [PMID: 29898184 PMCID: PMC6010326 DOI: 10.1590/1678-7757-2017-0536] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Accepted: 02/22/2018] [Indexed: 11/24/2022] Open
Abstract
While the combined effect of microwave irradiation with cleansing solutions on denture base materials has been investigated, the effects of only using microwave irradiation and, more importantly, in a long-term basis, was not studied yet.
Collapse
Affiliation(s)
- Nick Polychronakis
- National and Kapodistrian University of Athens, School of Dentistry, Department of Prosthodontics, Athens, Greece
| | - Gregory Polyzois
- National and Kapodistrian University of Athens, School of Dentistry, Department of Prosthodontics, Athens, Greece
| | - Panagiotis Lagouvardos
- National and Kapodistrian University of Athens, School of Dentistry, Department of Operative Dentistry, Athens, Greece
| | - Andreas Andreopoulos
- National Technical University of Athens, School of Chemical Engineering, Department of Synthesis and Development of Industrial Processes, Athens, Greece
| | - Hien Chi Ngo
- University of Sharjha, College of Dental Medicine, Department of Preventive and Restorative Dentistry, Sharjha, United Arab Emirates
| |
Collapse
|
20
|
Zoidis P, Polychronakis N, Lagouvardos P, Polyzois G, Ngo HC. Evaluation of a Realistic Cleansing Protocol for Preventing Discoloration of Denture Resins. J Prosthodont 2018; 28:e89-e95. [PMID: 29468768 DOI: 10.1111/jopr.12763] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/16/2017] [Indexed: 11/28/2022] Open
Abstract
PURPOSE To evaluate the efficacy of a realistic staining/cleansing protocol for long-term prevention of discoloration of denture base resins. MATERIALS AND METHODS Sixty discs (20 × 2.5 mm) of auto- and heat-polymerizing denture acrylic resins were fabricated following manufacturer's instructions, polished on one side and stored in water (37°C) for 24 hours before they were assigned randomly into 6 groups (3 for each material, n = 10) to receive 220 cycles of three immersion protocols. Group A was immersed in the following baths: (1) filtered coffee at 45°C for 2 minutes, (2) tap water at 24°C for 20 seconds, (3) as bath 1, (4) as bath 2, (5) Corega Extradent cleansing solution at 45°C for 3 minutes, and (6) water at 24°C for 20 seconds. Group B was immersed in the four first baths of group A (without cleansing action) and group C in bath 1 for the cumulative action of 20 cycles (80 minutes in 45°C coffee) and bath 2 for 40 seconds. A noncontact optical interferometric profilometer was used for qualitative evaluation of the specimens and a contact colorimeter to estimate color change values (ΔΕ*ab) at baseline and every 20 cycles in the baths for a total of 220 cycles. Data were statistically analyzed using a 2-way-repeated measures ANOVA with Bonferoni multiple comparisons and trend analysis at α = 0.05 level of significance. RESULTS Data indicated changes in color from 1.7 to 14.2 ΔΕ*ab units. The highest values were related to the number of cycles and group B immersion protocol. Significant differences were found among immersion protocols (p < 0.001) and immersion cycles (p < 0.001) with a significant interaction between protocols and cycles (p < 0.001) but not between denture resins (p = 0.991). CONCLUSION The evaluated protocol A was found effective in preventing color changes in both denture resins even after a long period of action. Protocol C had a much lower staining effect on both resins than protocol B and behaved similarly to protocol A until 140 to 160 cycles. Therefore, it is probably not appropriate for use in short-term color stability experiments.
Collapse
Affiliation(s)
- Panagiotis Zoidis
- Department of Prosthodontics, Dental School, National and Kapodistrian University of Athens, Athens, Greece
| | - Nikolaos Polychronakis
- Department of Prosthodontics, Dental School, National and Kapodistrian University of Athens, Athens, Greece
| | - Panagiotis Lagouvardos
- Department of Operative Dentistry, Dental School, National and Kapodistrian University of Athens, Athens, Greece
| | - Gregory Polyzois
- Department of Prosthodontics, Dental School, National and Kapodistrian University of Athens, Athens, Greece
| | - Hien Chi Ngo
- Department of Preventive and Restorative Dentistry, College of Dental Medicine, University of Sharjha, Sharjha, United Arab Emirates
| |
Collapse
|
21
|
Heidrich D, Fortes CBB, Mallmann AT, Vargas CM, Arndt PB, Scroferneker ML. Rosemary, Castor Oils, and Propolis Extract: Activity Against Candida Albicans and Alterations on Properties of Dental Acrylic Resins. J Prosthodont 2018; 28:e863-e868. [PMID: 29322644 DOI: 10.1111/jopr.12746] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/05/2017] [Indexed: 12/24/2022] Open
Abstract
PURPOSE To evaluate the in vitro activity of 8% rosemary, 2% castor oils, and 12% propolis glycolic extract against Candida albicans, as well as the physical changes of properties in colorless and pink acrylic resins after immersion in these liquids. MATERIALS AND METHODS Colorimetric, roughness, and Knoop microhardness assays were evaluated in 25 specimens distributed into five groups (3 test groups and 2 control groups - distilled water and hypochlorite 1%), totaling five specimens per group for each acrylic resin (colorless and pink). The specimens were individually immersed for 30 minutes in 10 mL of these liquids, washed, and dried once a week. They were maintained in distilled water at 37°C between processes during all experiments. The analyses were performed before immersion and in the 4th and/or 12th month. In vitro, 18 acrylic resins were exposed to C. albicans and, after a process of 30 minutes in immersion in the five groups cited and oil vehicle control of vesicle (liquid Vaseline), the specimens were washed and incubated for 24 hours in 37°C. The growth was determined by colony counting. For comparisons between the groups in each trial and the disinfection test, paired Student's t-tests and ANOVA with post hoc Tukey were performed by the SPSS program, considering α = 0.05. RESULTS None of the liquids altered the microhardness, but all the natural compounds and 1% sodium hypochlorite (control) altered color and roughness after the 12th month of immersion in these agents. In the colorless specimens, 8% rosemary oil caused a color change similar to water, and less color and roughness alterations when compared to 2% castor oil and 1% sodium hypochlorite, respectively. There was no growth of yeast colonies after immersion in rosemary oil, propolis glycolic extract, and 1% sodium hypochlorite. CONCLUSION Eight percent rosemary oil has the potential to be used as an acrylic resin disinfectant.
Collapse
Affiliation(s)
- Daiane Heidrich
- Postgraduate Program in Medicine, Medical Sciences, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil.,Department of Microbiology, Immunology and Parasitology, ICBS, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Carmen Beatriz Borges Fortes
- Departament of Conservative Dentistry, School of Dentistry, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Aline Taís Mallmann
- Departament of Conservative Dentistry, School of Dentistry, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Clarissa Machado Vargas
- Departament of Conservative Dentistry, School of Dentistry, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Paula Borges Arndt
- Departament of Conservative Dentistry, School of Dentistry, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Maria Lúcia Scroferneker
- Postgraduate Program in Medicine, Medical Sciences, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil.,Department of Microbiology, Immunology and Parasitology, ICBS, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| |
Collapse
|
22
|
Neppelenbroek KH, Urban VM, de Oliveira DG, Porto VC, Almilhatti HJ, Campanha NH. Effect of potentially chromogenic beverages on shear bond strength of acrylic denture teeth to heat-polymerized denture base resins. J Indian Prosthodont Soc 2016; 16:271-5. [PMID: 27621547 PMCID: PMC5000564 DOI: 10.4103/0972-4052.179265] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Background: Detachment of denture acrylic resin artificial teeth from denture base resin is one of the most common problems presented by denture wearers. Purpose: This study investigated the shear bond strength (SBS) and fracture type of bonding interface of two commercial acrylic teeth (Vipi Dent Plus e Biolux) to two denture base resins (Vipi Cril e Lucitone 550) after immersion in potentially chromogenic beverages (coffee, cola soft drink, and red wine) or control solution (distilled water). Materials and Methods: Maxillary central incisor acrylic teeth were placed at 45° to denture base resin and submitted to short polymerization cycle according to manufacturers. Specimens were divided according to the combination tooth/resin/solution (n = 8) and submitted to bond strength tests in a universal testing machine MTS-810 (0.5 mm/min). Subsequently, fracture area was analyzed by stereomicroscope at a magnification of ×10 and categorized into adhesive, cohesive, or mixed failure. Results: The bond strength of teeth/denture base resins interface was not significantly affected by tested solutions (P > 0.087), except for Biolux teeth immersed in coffee (P < 0.01). In all conditions, the Vipi Dent Plus teeth showed higher bond strength to Lucitone and Vipi Cril resins when compared to Biolux teeth (P < 0.003). All specimens’ failure modes were cohesive. Conclusions: The SBS of acrylic teeth to denture base resins was not generally influenced by immersion in the tested staining beverages.
Collapse
Affiliation(s)
| | | | - Denise Gusmão de Oliveira
- Department of Prosthodontics, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil
| | - Vinícius Carvalho Porto
- Department of Prosthodontics, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil
| | | | - Nara Hellen Campanha
- Department of Dentistry, Ponta Grossa State University, Ponta Grossa, Paraná, Brazil
| |
Collapse
|
23
|
Hollis S, Eisenbeisz E, Versluis A. Color stability of denture resins after staining and exposure to cleansing agents. J Prosthet Dent 2015; 114:709-14. [DOI: 10.1016/j.prosdent.2015.06.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2014] [Revised: 05/27/2015] [Accepted: 06/01/2015] [Indexed: 10/23/2022]
|
24
|
Jang DE, Lee JY, Jang HS, Lee JJ, Son MK. Color stability, water sorption and cytotoxicity of thermoplastic acrylic resin for non metal clasp denture. J Adv Prosthodont 2015; 7:278-87. [PMID: 26330974 PMCID: PMC4551783 DOI: 10.4047/jap.2015.7.4.278] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2014] [Revised: 02/23/2015] [Accepted: 03/20/2015] [Indexed: 12/03/2022] Open
Abstract
PURPOSE The aim of this study was to compare the color stability, water sorption and cytotoxicity of thermoplastic acrylic resin for the non-metal clasp dentures to those of thermoplastic polyamide and conventional heat-polymerized denture base resins. MATERIALS AND METHODS Three types of denture base resin, which are conventional heat-polymerized acrylic resin (Paladent 20), thermoplastic polyamide resin (Bio Tone), thermoplastic acrylic resin (Acrytone) were used as materials for this study. One hundred five specimens were fabricated. For the color stability test, specimens were immersed in the coffee and green tee for 1 and 8 weeks. Color change was measured by spectrometer. Water sorption was tested after 1 and 8 weeks immersion in the water. For the test of cytotoxicity, cell viability assay was measured and cell attachment was analyzed by FE-SEM. RESULTS All types of denture base resin showed color changes after 1 and 8 weeks immersion. However, there was no significant difference between denture base resins. All specimens showed significant color changes in the coffee than green tee. In water sorption test, thermoplastic acrylic resin showed lower values than conventional heat-polymerized acrylic resin and thermoplastic polyamide resin. Three types of denture base showed low cytotoxicity in cell viability assay. Thermoplastic acrylic resin showed the similar cell attachment but more stable attachment than conventional heat-polymerized acrylic resin. CONCLUSION Thermoplastic acrylic resin for the non-metal clasp denture showed acceptable color stability, water sorption and cytotoxicity. To verify the long stability in the mouth, additional in vitro studies are needed.
Collapse
Affiliation(s)
- Dae-Eun Jang
- Department of Prosthodontics, School of Dentistry, Chosun University, Gwangju, Republic of Korea
| | - Ji-Young Lee
- Department of Prosthodontics, School of Dentistry, Chosun University, Gwangju, Republic of Korea
| | - Hyun-Seon Jang
- Department of Oral Pathology, School of Dentistry, Chosun University, Gwangju, Republic of Korea
| | - Jang-Jae Lee
- Department of Computer Science and Statistics, College of Natural Sciences, Chosun University, Gwangju, Republic of Korea
| | - Mee-Kyoung Son
- Department of Prosthodontics, School of Dentistry, Chosun University, Gwangju, Republic of Korea
| |
Collapse
|
25
|
Feitosa FA, Reggiani MGL, Araújo RMD. Removable partial or complete dentures exposed to beverages and mouthwashes: evaluation of microhardness and roughness. REVISTA DE ODONTOLOGIA DA UNESP 2015. [DOI: 10.1590/1807-2577.0049] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
<title>Abstract</title><sec><title>Purpose</title><p>To evaluate microhardness and roughness of denture base polymethylmethacrylate resinn exposed to acid beverages and mouthwashes.</p></sec><sec><title>Material and method</title><p>Rectangular samples (n=80) were prepared from poly (methyl methacrylate) (PMMA). They were divided into 8 groups and had the initial microhardness and Knoop roughness measured. Samples of each group were immersed for 10 min into a test solution (coffee, lemon juice, chlorhexidine gluconate, red wine, cola-based soft drink, vinegar or antiseptic with and without alcohol) and after stored in artificial saliva for 23 h and 50 min, completing a period of 24 h. This procedure was performed for 14 consecutive days and after this period the microhardness and surface roughness measurements were made again. Data were statistically analyzed using ANOVA non parametric, Kruskal-Walis and the Dunn´s test for microhardness and the t-Student and ANOVA for roughness.</p></sec><sec><title>Result</title><p>For microhardness there were found statistically significant differences among the chlorhexidine gluconate solution, antiseptic without alcohol and cola-based soft drink. For roughness was observed that the mean values between the initial period and after immersion in the test products differed statistically in all groups, without difference among groups.</p></sec><sec><title>Conclusion</title><p>The microhardness of poly(methyl methacrylate) was affected by continue exposition to chlorhexidine gluconate, antiseptic without alcohol and cola-based soft drink. The roughness of poly(methyl methacrylate) is negatively influenced by the exposure to all tested products. It may be concluded that both, microhardness and roughness, were affected by the treatments.</p></sec>
Collapse
|
26
|
Polychronakis NC, Polyzois GL, Lagouvardos PE, Papadopoulos TD. Effects of cleansing methods on 3-D surface roughness, gloss and color of a polyamide denture base material. Acta Odontol Scand 2015; 73:353-63. [PMID: 25367196 DOI: 10.3109/00016357.2014.967720] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVE The purpose of this study was to determine the effects of two denture cleansing methods on 3-D surface roughness, gloss and color of denture base materials. MATERIALS AND METHODS Thirty disks from nylon (Valplast) and 30 from heat-polymerized acrylic denture base material (Paladon 65) were made and 10 of each material were immersed in water (control), Val-Clean (peroxide cleanser) and Corega Extradent (peroxide cleanser) plus microwaving for a period simulating 30 days of daily cleansing. 3-D surface roughness, gloss and color parameters were measured before and after cleansing using an interferometric profilometer, a gloss meter and a colorimeter. The results were statistically analysed by regression, paired-t, Mann-Whitney and Kruskal-Wallis tests at α = 0.05 level of significance. RESULTS The results showed significant differences at baseline in L* and b* parameters between materials (p < 0.01), with a significantly lower gloss (p < 0.05) and higher roughness (p < 0.05) for Valplast. After cleansing, Δϵ* was significantly greater in Valplast than Paladon 65 (p < 0.05). Gloss of both materials decreased significantly within the Corega Extradent plus microwave solution (p < 0.05), while roughness increased significantly only for Paladon 65 (p < 0.05). CONCLUSIONS Valplast was found to have a significantly lower gloss and a higher roughness than Paladon 65 before cleansing. After cleansing, ΔE* increased more in Valplast than in Paladon 65, gloss of both materials decreased and roughness only of Paladon 65 increased within the Corega extradent plus microwaving method.
Collapse
|
27
|
Kurtulmus-Yilmaz S, Deniz ST. Evaluation of staining susceptibility of resin artificial teeth and stain removal efficacy of denture cleansers. Acta Odontol Scand 2014; 72:811-8. [PMID: 24807730 DOI: 10.3109/00016357.2014.913195] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVE To assess the staining susceptibility of four acrylic resin (Ivostar, SR Vivodent PE, Major Dent, Integral) and a nanocomposite resin (Veracia) artificial teeth and to evaluate the stain removal efficacy of denture cleansers. MATERIALS AND METHODS Sixty maxillary incisors of each brand (total = 300) were divided into three groups according to staining solution as coffee, red wine and tea. Baseline color measurements were performed with a spectrophotometer. Specimens were immersed in staining solutions for 14 h (2 h × 7 days) and then second color measurements were performed. Each group was further divided into four sub-groups according to denture cleanser as Corega tabs, Fittydent, NaOCl (0.5%) and distilled water (control) (n = 5). Specimens were immersed in denture cleansers for 8 h and third color measurements were made. Thus, the weekly simulation period was completed. This cycle was repeated 12 times to simulate a 3-month time period and measurements were performed at the end of the 4th, 8th and 12th cycles. ΔE values were calculated and data were analyzed with 3-way repeated measures ANOVA and Bonferroni tests. RESULTS Significant color differences were found among the teeth and staining solutions, but all of the color differences were in the clinically acceptable range (ΔE < 5.5). Integral showed the highest ΔE values for all solutions, while Ivostar and Vivodent demonstrated the lowest ΔE values for red wine and tea solutions. There was no significant difference among the denture cleansers in terms of stain removal efficacy. CONCLUSIONS Cross-linked acrylic (Integral) and nanocomposite (Veracia) resin teeth were more susceptible to staining. Denture cleansers were efficient on stain removal from artificial teeth.
Collapse
Affiliation(s)
- Sevcan Kurtulmus-Yilmaz
- Department of Prosthodontics, Faculty of Dentistry, Near East University , Mersin 10 , Turkey
| | | |
Collapse
|
28
|
Ayaz EA, Altintas SH, Turgut S. Effects of cigarette smoke and denture cleaners on the surface roughness and color stability of different denture teeth. J Prosthet Dent 2014; 112:241-8. [PMID: 24787128 DOI: 10.1016/j.prosdent.2014.01.027] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2013] [Revised: 01/12/2014] [Accepted: 01/13/2014] [Indexed: 10/25/2022]
Abstract
STATEMENT OF PROBLEM Denture teeth have the most effect on the esthetics of complete dentures. However, extrinsic factors can change their roughness and color. PURPOSE The purpose of this study was to investigate the effects of smoking and denture cleaners on the roughness and color (CIE [Commission International de I'Eclairage] L*a*b*) of denture teeth. MATERIAL AND METHODS Maxillary central incisors made of acrylic resin, high-strength acrylic resin, and porcelain (Acrylux, SR, Orthosit PE-O, and Enta) were divided into 4 groups (n=10): control, denture cleaner, cigarette smoke, and cigarette smoke and denture cleaner. The dental cleaner group and cigarette smoke and dental cleaner group were immersed in denture cleaner (Protefix; Queisser Pharma) for 15 minutes; the cigarette smoke group and cigarette smoke and dental cleaner group were exposed to smoke from 20 cigarettes for 10 minutes per cigarette. The roughness was measured with a profilometer, and the color was measured with a colorimeter. The CIE L*a*b* values were recorded. The data were analyzed with a 3-way ANOVA and the Fisher least significant difference test (α=.05). RESULTS The roughness of Acrylux, SR Orthosit PE-O (P<.001), and Enta (P<.01) was significantly higher in the cigarette smoke group and dental cleaner group than in the control group. Immersion in denture cleaner after exposure to cigarette smoke decreased the roughness of Acrylux, SR Orthosit PE-O (P<.001), and Enta (P<.01). The greatest color change (7.94) was observed in Acrylux in the cigarette smoke group, whereas the smallest color change (0.24) was in Enta in the control group. The color change of all of the teeth in the cigarette smoke group decreased after exposure to denture cleaner (P<.05). The L* decreased, and the a* and b* increased after exposure to smoke (P<.05). CONCLUSIONS Smoking and denture cleaner increased the roughness and discolored the teeth, whereas denture cleaners after exposure to smoke decreased the roughness.
Collapse
Affiliation(s)
- Elif Aydogan Ayaz
- Assistant Professor, Department of Prosthodontics, Faculty of Dentistry, Karadeniz Technical University, Trabzon, Turkey.
| | - Subutay Han Altintas
- Associate Professor, Department of Prosthodontics, Faculty of Dentistry, Karadeniz Technical University, Trabzon, Turkey
| | - Sedanur Turgut
- Assistant Professor, Department of Prosthodontics, Faculty of Dentistry, Karadeniz Technical University, Trabzon, Turkey
| |
Collapse
|
29
|
Moon A, Powers JM, Kiat-Amnuay S. Color stability of denture teeth and acrylic base resin subjected daily to various consumer cleansers. J ESTHET RESTOR DENT 2014; 26:247-55. [PMID: 24980803 DOI: 10.1111/jerd.12109] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
OBJECTIVE This study evaluated color stability of acrylic denture teeth and base resins after 48 weeks of commercial denture cleanser simulation. MATERIALS AND METHODS Two brands of denture teeth (Trubyte Portrait IPN, TP; SR Vivodent DCL, SR) in shades A1, B1, and C1 and three acrylic base resins (Lucitone, LU; Paragon, PA; Valplast, VA) prepared to manufacturer's specifications were exposed 10 hours daily to four cleansers (Clorox Bleach, CB; Polident 3 minute, PO3; Efferdent, EF; and Kleenite, KL) and distilled water control, approximating consumer overnight use. Color measurements used the standard Commision International de l'Eclairage (International Commission on Illumination, CIE L*a*b*) color space (0, 4, 12, 24, 36, and 48 weeks.) Color differences (ΔE*) at 48 weeks were subjected to four-way analysis of variance (ANOVA). Mean values were compared with Fisher's (protected least significant difference) intervals (0.05 significance level). RESULTS Mean color differences (ΔE*) demonstrated color changes in each material. ANOVA-indicated color changes in teeth were significantly affected by both cleansers and teeth brand (p < 0.05), but not shade. Color changes in base resins were significantly affected by cleansers (p < 0.05), but not brand alone. Overall, KL produced the least color change while CB and PO3 produced the most for all materials. CONCLUSIONS After 48 weeks of daily simulation, TP teeth were more color stable than SR in all cleansers except EF (p < 0.0001). Base resin VA was less color stable than LU and PA. Cleanser KL resulted in the lowest color changes. CLINICAL SIGNIFICANCE All tested materials yield clinically acceptable color changes (ΔE* < 3.5); all cleansing methods tested can be recommended, although Kleenite demonstrated the least change after 48 weeks.
Collapse
Affiliation(s)
- Audrey Moon
- The University of Texas School of Dentistry at Houston, Houston, Texas, USA
| | | | | |
Collapse
|
30
|
Effect of 5.25 % sodium hypochlorite on color stability of acrylic and silicone based soft liners and a denture base acrylic resin. J Indian Prosthodont Soc 2014; 14:179-86. [PMID: 24757356 DOI: 10.1007/s13191-013-0309-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2013] [Accepted: 07/31/2013] [Indexed: 10/26/2022] Open
Abstract
The purpose of the current study was to investigate the effect of a chemical disinfectant (sodium hypochlorite 5.25 %) on color stability of a denture base acrylic resin and two processed soft denture lining materials of two different types (acrylic-based and silicone-based). Ten specimens from each type of materials tested were made (2 × 20 × 20 mm). All specimens were immersed in sodium hypochlorite (5.25 %). Colorimetric measurements for each specimen were taken before immersion, and after 24 h and 7 days of immersion. Color changes were evaluated using the CIE L*a*b* colorimetric system. Data were statistically analyzed with one-way analysis of variance (ANOVA) (α = 0.05). ANOVA was followed by Bonferroni test to determine which groups differed from each other. ΔE and ΔL* of the silicone-based liner at the 1st and 7th days of immersion were significantly more than of denture base acrylic resin and acrylic-based liner. Change in ΔL* values of denture base acrylic resin and acrylic-based liner was small and statistically insignificant after 24 h of its immersion. However, the increase in ΔL* values of the acrylic-based liner after 7 days of immersion was considerably more than of denture base acrylic resin. Color changes in denture base acrylic resin and soft denture liners tended to increase with longer immersion times, and the color stability of the soft denture liners was influenced by its chemical type.
Collapse
|
31
|
Piskin B, Sipahi C, Akin H. Effect of Different Chemical Disinfectants on Color Stability of Acrylic Denture Teeth. J Prosthodont 2014; 23:476-83. [DOI: 10.1111/jopr.12131] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/15/2013] [Indexed: 11/27/2022] Open
Affiliation(s)
- Bulent Piskin
- Associate Professor, Department of Prosthodontics; Gulhane Military Medical Academy; Ankara Turkey
| | - Cumhur Sipahi
- Associate Professor, Department of Prosthodontics; Gulhane Military Medical Academy; Ankara Turkey
| | - Hakan Akin
- Associate Professor, Department of Prosthodontics; Faculty of Dentistry, Cumhuriyet University; Sivas Turkey
| |
Collapse
|
32
|
Goiato MC, Nóbrega AS, dos Santos DM, Andreotti AM, Moreno A. Effect of different solutions on color stability of acrylic resin-based dentures. Braz Oral Res 2013; 28:S1806-83242013005000033. [PMID: 24878668 DOI: 10.1590/s1806-83242013005000033] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2013] [Accepted: 09/28/2013] [Indexed: 11/22/2022] Open
Abstract
The aim of this study was to evaluate the effect of thermocycling and immersion in mouthwash or beverage solutions on the color stability of four different acrylic resin-based dentures (Onda Cryl, OC; QC20, QC; Classico, CL; and Lucitone, LU). The factors evaluated were type of acrylic resin, immersion time, and solution (mouthwash or beverage). A total of 224 denture samples were fabricated. For each type of resin, eight samples were immersed in mouthwashes (Plax-Colgate, PC; Listerine, LI; and Oral-B, OB), beverages (coffee, CP; cola, C; and wine, W), and artificial saliva (AS; control). The color change (DE) was evaluated before (baseline) and after thermocycling (T1), and after immersion in solution for 1 h (T2), 3 h (T3), 24 h (T4), 48 h (T5), and 96 h (T6). The CIE Lab system was used to determine the color changes. The thermocycling test was performed for 5000 cycles. Data were submitted to three-way repeated-measures analysis of variance and Tukey's test (p<0.05). When the samples were immersed in each mouthwash, all assessed factors, associated or not, significantly influenced the color change values, except there was no association between the mouthwash and acrylic resin. Similarly, when the samples were immersed in each beverage, all studied factors influenced the color change values. In general, regardless of the solution, LU exhibited the greatest DE values in the period from T1 to T5; and QC presented the greatest DE values at T6. Thus, thermocycling and immersion in the various solutions influenced the color stability of acrylic resins and QC showed the greatest color alteration.
Collapse
Affiliation(s)
- Marcelo Coelho Goiato
- Department of Dental Materials and Prosthodontics, Araçatuba Dental School, Univ Estadual Paulista, Araçatuba, SP, Brazil
| | - Adhara Smith Nóbrega
- Department of Dental Materials and Prosthodontics, Araçatuba Dental School, Univ Estadual Paulista, Araçatuba, SP, Brazil
| | - Daniela Micheline dos Santos
- Department of Dental Materials and Prosthodontics, Araçatuba Dental School, Univ Estadual Paulista, Araçatuba, SP, Brazil
| | - Agda Marobo Andreotti
- Department of Dental Materials and Prosthodontics, Araçatuba Dental School, Univ Estadual Paulista, Araçatuba, SP, Brazil
| | - Amália Moreno
- Department of Dental Materials and Prosthodontics, Araçatuba Dental School, Univ Estadual Paulista, Araçatuba, SP, Brazil
| |
Collapse
|
33
|
Arocha MA, Mayoral JR, Lefever D, Mercade M, Basilio J, Roig M. Color stability of siloranes versus methacrylate-based composites after immersion in staining solutions. Clin Oral Investig 2012; 17:1481-7. [DOI: 10.1007/s00784-012-0837-7] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2011] [Accepted: 08/31/2012] [Indexed: 11/24/2022]
|
34
|
Singh SV, Aggarwal P. Effect of tea, coffee and turmeric solutions on the colour of denture base acrylic resin: an in vitro study. J Indian Prosthodont Soc 2012; 12:149-53. [PMID: 23997464 DOI: 10.1007/s13191-012-0122-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2011] [Accepted: 05/12/2012] [Indexed: 11/27/2022] Open
Abstract
Discoloration of acrylic resin denture base when it comes in contact with various food materials and beverages in the oral cavity may cause aesthetic concern to a denture wearer. The objective of this study was to evaluate the effect of tea, coffee and turmeric solutions on the colour of different brands of heat cure acrylic resin denture base materials commonly used in India. Spectrophotometer was used to evaluate the colour change. A significant difference was found when change in colour was statistically analysed.
Collapse
Affiliation(s)
- S V Singh
- Santosh Dental College and Hospital, Ghaziabad, U.P. India
| | | |
Collapse
|
35
|
Fernandes FHCN, Orsi IA, Villabona CA. Effects of the peracetic acid and sodium hypochlorite on the colour stability and surface roughness of the denture base acrylic resins polymerised by microwave and water bath methods. Gerodontology 2012; 30:18-25. [DOI: 10.1111/j.1741-2358.2012.00640.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
36
|
Gupta G, Gupta T. Evaluation of the effect of various beverages and food material on the color stability of provisional materials - An in vitro study. J Conserv Dent 2011; 14:287-92. [PMID: 22025835 PMCID: PMC3198561 DOI: 10.4103/0972-0707.85818] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2010] [Revised: 04/28/2011] [Accepted: 05/28/2011] [Indexed: 11/06/2022] Open
Abstract
Aim: This study evaluated the color stability of four provisional materials: 1) Poly-methyl methacrylates (DPI); 2) Bis-acryl composite (ProtempTM II – 3M ESPE); 3) Bis-acryl composite (Systemp® c and b – Ivoclar Vivadent) and 4) Light polymerized composite resin (Revotek LC- GC). Materials and Methods: The color and color difference of each specimen after immersion in different staining solutions i.e. 1) tea and artificial saliva, 2) coffee and artificial saliva, 3) Pepsi and artificial saliva, 4) turmeric solution and artificial saliva was measured using reflectance spectrophotometer with CIELAB system before immersion and after immersion at 2, 5 ,7 , 10 and 15 days. Results: Revotek LC- GC (light polymerized composite resin) was found to be the most color stable provisional restorative material followed by Protemp II (Bis-acryl composite), Systemp (Bis-acryl composite) and DPI (Methylmethacrylate resin). Turmeric solution had the maximum staining potential followed by coffee, tea and Pepsi.
Collapse
Affiliation(s)
- Gaurav Gupta
- Department of Prosthodontics, Guru Nanak Dev Dental College, Sunam, Punjab, India
| | | |
Collapse
|
37
|
Sepúlveda-Navarro WF, Arana-Correa BE, Ferreira Borges CP, Habib Jorge J, Urban VM, Campanha NH. Color Stability of Resins and Nylon as Denture Base Material in Beverages. J Prosthodont 2011; 20:632-8. [DOI: 10.1111/j.1532-849x.2011.00791.x] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
|
38
|
Moffa EB, Giampaolo ET, Izumida FE, Pavarina AC, Machado AL, Vergani CE. Colour stability of relined dentures after chemical disinfection. A randomised clinical trial. J Dent 2011; 39 Suppl 3:e65-71. [PMID: 22044774 DOI: 10.1016/j.jdent.2011.10.008] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2011] [Revised: 09/30/2011] [Accepted: 10/17/2011] [Indexed: 11/27/2022] Open
Abstract
BACKGROUND This randomised clinical study evaluated the effect of chemical disinfection with sodium perborate or chlorhexidine on the colour stability of a hard chairside reline resin during six months. METHODS Hard chairside reline resin (Tokuyama Rebase Fast II) was used to reline complete dentures. After baseline colour measurements, the patients were randomly divided into 3 groups (n = 15) and allocation was concealed with the use of the BioStat program. The dentures were cleansed according to three methods: CG (control group)--brushing with coconut soap and soft toothbrush, PG (Perborate group)--brushing according to previous methods and disinfection with warmed sodium perborate solution (Corega Tabs) for 5 min, once a day for 6 months and ChxG (Chlorhexidine Group)--brushing according to CG and disinfection with chlorhexidine digluconate 2% for 5min once a day for 6 months. The data of ΔE*, ΔL*, Δa* and Δb* were analysed by 2-way repeated-measures ANOVAs and Tukey tests (α = 0.05). RESULTS There were significant differences amongst groups for ΔL, Δa and Δb. The time had a significant effect on ΔE and ΔL, for all groups evaluated. CONCLUSION Changes in some colour parameters (ΔL, Δa and Δb) of the reline resin Tokuyama Rebase were observed when the dentures were disinfected by perborate and chlorhexidine digluconate 2% solutions. The colour stability of was also influenced by time, regardless of disinfection or nondisinfection. CLINICAL IMPLICATIONS Colour stability of the denture materials is one variable to be considered when choosing disinfection methods. The data in this study will be useful to clinicians when they are selecting disinfectant solutions for disinfection of relined denture.
Collapse
Affiliation(s)
- Eduardo Buozi Moffa
- Department of Dental Materials and Prosthodontics, Araraquara Dental School, UNESP - Univ Estadual Paulista, Rua Humaita, 1680 CEP 14801-903 Araraquara, São Paulo, Brazil
| | | | | | | | | | | |
Collapse
|
39
|
RUTKUNAS V, SABALIAUSKAS V, MIZUTANI H. Effects of different food colorants and polishing techniques on color stability of provisional prosthetic materials. Dent Mater J 2010; 29:167-76. [DOI: 10.4012/dmj.2009-075] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
40
|
Assunção WG, Barão VAR, Pita MS, Goiato MC. Effect of polymerization methods and thermal cycling on color stability of acrylic resin denture teeth. J Prosthet Dent 2009; 102:385-92. [PMID: 19961997 DOI: 10.1016/s0022-3913(09)60200-6] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Wirley Gonçalves Assunção
- Associate Professor, Department of Dental Materials and Prosthodontics, Araçatuba Dental School, São Paulo State University (UNESP), São Paulo, Brazil.
| | | | | | | |
Collapse
|
41
|
Yu H, Pan X, Lin Y, Li Q, Hussain M, Wang Y. Effects of carbamide peroxide on the staining susceptibility of tooth-colored restorative materials. Oper Dent 2009; 34:72-82. [PMID: 19192840 DOI: 10.2341/08-42] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This study investigated the effects of an at-home bleaching gel containing 15% carbamide peroxide on the susceptibility of tooth-colored restorative materials to different staining solutions. The tooth-colored restoratives used in this study were a nano resin composite (Filtek Z350), a packable resin composite (Filtek P60), a polyacid-modified composite (Dyract AP) and a glass-ionomer cement (Ketac Molar Easymix). Each material was equally divided into two groups (n = 34): the bleaching group and the control group. This study included two treatment segments. In the first part (days 1-14), the specimens of the bleaching group were bleached with 15% carbamide peroxide gels for eight hours daily, while the specimens in the control group were stored in deionized water. Subsequently, four specimens from each group were randomly selected for observation under an environmental scanning electron microscope. In the second part (days 15-42), the samples were not bleached. Instead, they were stored in five different kinds of solutions. Color measurements for each sample were taken at six different time periods using a spectrophotometer. The data was then analyzed using SPSS statistical software. After two-weeks of bleaching, all the specimens showed statistically significant color changes compared with the control specimens. Furthermore, the bleaching agents seriously affected the surface morphology of Dyract AP and Ketac Molar Easymix. Following exposure to the staining solutions, it was found that the bleached restorative materials exhibited greater staining susceptibility than the control materials. Filtek Z350 and P60 exhibited the best color stability, while Dyract AP exhibited the least color stability.
Collapse
Affiliation(s)
- Hao Yu
- Department of Prosthodontics, School and Hospital of Stomatology, Wuhan University, Wuhan, China
| | | | | | | | | | | |
Collapse
|
42
|
Influence of denture cleansers on the color stability of three types of denture base acrylic resin. J Prosthet Dent 2009; 101:205-13. [DOI: 10.1016/s0022-3913(09)60032-9] [Citation(s) in RCA: 89] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
43
|
Cal E, Güneri P, Kose T. Digital analysis of mouthrinses? staining characteristics on provisional acrylic resins. J Oral Rehabil 2007; 34:297-303. [PMID: 17371568 DOI: 10.1111/j.1365-2842.2007.01727.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Provisional restorations are expected to be both aestethically and physically durable during the preparation of permanent restorations. In this study, the staining properties of mouthrinses containing chlorhexidine gluconate, benzydamine hydrochloride and a hybrid mouthrinse were investigated on light and dark shades of a provisional acrylic resin. Totally 80 specimens were prepared and were photographed digitally to obtain the baseline L*, a*, b* values. Each sample was immersed in test solutions for 12 h which was equivalent time to 1 year of mouthrinse use, and the post-treatment images of the test materials were acquired. All L*, a*, b* values were analysed by a graphic software, and the total colour change (DeltaE*) of each specimen was calculated. Also the same colour analyses were performed on all test solutions to establish their colour parameters. Analysis of variance and Tukey's tests were used for statistical analyses and alpha was 0.05. All test solutions produced perceptible staining on the provisional material, with DeltaE values over 3.7. In both shades, hybrid rinse caused the highest staining (DeltaE=5.705), and was followed by chlorhexidine gluconate rinse, with DeltaE value of 4.120. The third highest staining was observed with benzydamine hydrochloride rinse (DeltaE=3.959), whereas the control caused the least staining (DeltaE=3.095). The lighter shade provisional material resulted with clinically observable staining even when immersed in distilled water; however, the dark shades showed clinically perceptible staining solely with the hybrid mouthrinse. In this study, the shade of the acrylic material was the determinator of the staining process.
Collapse
Affiliation(s)
- E Cal
- Department of Prosthodontics, School of Dentistry, Ege University, Bornova, Izmir, Turkey.
| | | | | |
Collapse
|
44
|
Shimada K, Nakazawa M, Kakehashi Y, Matsumura H. Influence of Abutment Materials on the Resultant Color of Heat-pressed Lithium Disilicate Ceramics. Dent Mater J 2006; 25:20-5. [PMID: 16706292 DOI: 10.4012/dmj.25.20] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The purpose of this study was to evaluate the influence of abutment materials on the color of IPS Empress 2 ceramic coping with different thicknesses. Ceramic coping specimens (12.0x12.0x0.8-2.0 mm) were fabricated from IPS Empress 2 material (Ingot-100, n=5/group). Abutment specimens were fabricated from a build-up composite, a gold alloy, or a silver-palladium alloy. Color was evaluated using a colorimeter according to the CIE L*a*b* system. The L*a*b* values of the ceramic coping specimens of different thicknesses on each abutment specimen were measured. Following which, the color difference (deltaE*ab) values between the ceramic coping specimens on various abutment specimens were calculated. Significant differences in deltaE*ab value were observed among different abutment specimens at certain ceramic coping thicknesses (P<0.05). Thus, it was concluded that the color of IPS Empress 2 coping material was influenced significantly by both the thickness of the coping and the color of the abutment material.
Collapse
Affiliation(s)
- Kazuki Shimada
- Department of Crown and Bridge Prosthodontics, Nihon University School of Dentistry, Tokyo, Japan.
| | | | | | | |
Collapse
|
45
|
Shimada K, Kakehashi Y, Matsumura H, Tanoue N. In vivo quantitative evaluation of tooth color with hand-held colorimeter and custom template. J Prosthet Dent 2004; 91:389-91. [PMID: 15116043 DOI: 10.1016/j.prosdent.2004.02.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
This article presents a technique for quantitatively evaluating the color of teeth, as well as color change in restorations and tooth surfaces. Through use of a custom template made of a thermoplastic polymer and a dental colorimeter, tooth surface color can be recorded periodically at the same location intraorally.
Collapse
|
46
|
Lai YL, Lui HF, Lee SY. In vitro color stability, stain resistance, and water sorption of four removable gingival flange materials. J Prosthet Dent 2003; 90:293-300. [PMID: 12942065 DOI: 10.1016/s0022-3913(03)00432-3] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
STATEMENT OF PROBLEM Evaluation of the color stability of materials used for removable gingival flange prostheses may provide information on their serviceability. PURPOSE This in vitro study compared the color stability, stain resistance, and water sorption of 4 materials commonly used for gingival flange prostheses. MATERIAL AND METHODS Forty-five cylindrical disks (15 mm in diameter and 10 mm thick) were fabricated out of 1 silicone (Gingivamoll), 1 copolyamide (Flexite Supreme), and 2 heat-polymerized acrylic resins (QC-20 and Vertex). Ten specimens of each material were evaluated by a spectrophotometer after 7, 14, 30, 60, 120, and 180 days of immersion in staining solutions of coffee and tea, whereas specimens placed in water and exposed to air, served as controls. Color differences before staining and after storage periods were assessed. Another 5 specimens of each material were tested for water sorption after 56 days. Data for color change (DeltaE) and weight difference (DeltaW) were analyzed by use of a repeated measures analysis of variance and Scheffe's multiple comparisons (alpha=.05). RESULTS The coffee solution produced the highest discoloration value in the silicone material (DeltaE=7.31 +/- 0.57, P<.001), followed by the copolyamide (DeltaE=4.22 +/- 0.40, P<.001), and 2 acrylic resins. In the tea solution, the copolyamide had the greatest staining (DeltaE=2.74 +/- 0.56), whereas the other materials had smaller color changes (P<.001). All investigated materials were relatively color stable (DeltaE < 2) when stored in air and water for 6 months. The copolyamide material showed the greatest water uptake, whereas silicone adsorbed the least water (P<.001). CONCLUSIONS All flange materials tested demonstrated color stability in air and water. However, the color changes of silicone and copolyamide materials stored in coffee solution for 180 days were greater than 3 NBS (National Bureau of Standards) units, which would be characterized as appreciable and considered clinically unacceptable.
Collapse
Affiliation(s)
- Yu-lin Lai
- School of Dentistry, National Yang-Ming University, Taipei, Taiwan 112, Republic of China
| | | | | |
Collapse
|
47
|
Hayakawa I, Keh ES, Morizawa M, Muraoka G, Hirano S. A new polyisoprene-based light-curing denture soft lining material. J Dent 2003; 31:269-74. [PMID: 12735921 DOI: 10.1016/s0300-5712(03)00031-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
OBJECTIVES The purpose of this study was to investigate some clinically relevant properties of Clearfit LC, a newly developed polyisoprene-based light-curing lining material. Its properties were compared with those of other four commercial products. MATERIALS AND METHODS Five soft lining materials, Clearfit LC, two plasticised acrylics (Super-soft, Soften) and two silicones (Molloplast B, Sofreliner) were used to determine water sorption, solubility, staining resistance, Shore A hardness and shear bond strength to denture base. Five specimens for each test were fabricated. The results of each test among the five materials were compared by one-way ANOVA and Scheffe's post-hoc test at alpha=0.05. RESULTS One-way ANOVA of each test showed that the differences among five materials were significant (P<0.05). Clearfit LC showed the intermediate water sorption and solubility (10.07; 1.72 microg/mm(3)). It also showed the lowest color change in beta-carotene/olive oil solution and instant coffee solution (DeltaE=1.19, 5.48, respectively). The shear bond strength of Clearfit LC was 1.56MPa, and no adhesive failure was found. Its Shore A hardness value (56.2) was located between two acrylics and silicones. It was also found that the softer materials tend to failure cohesively. CONCLUSIONS The polyisoprene-based lining material showed low water sorption and solubility, moderate softness, high staining resistance and satisfactory shear bond strength to denture base resin. It also provides clinicians sufficient working time due to its light-curing property. It would be an attractive alternative as a relining material.
Collapse
Affiliation(s)
- Iwao Hayakawa
- Department of Complete Denture Prosthodontics Graduate School, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, 113-8549, Tokyo, Japan.
| | | | | | | | | |
Collapse
|
48
|
Jin C, Nikawa H, Makihira S, Hamada T, Furukawa M, Murata H. Changes in surface roughness and colour stability of soft denture lining materials caused by denture cleansers. J Oral Rehabil 2003; 30:125-30. [PMID: 12535137 DOI: 10.1046/j.1365-2842.2003.01014.x] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Soft denture lining materials were immersed into solutions of denture cleansers for 8 h at room temperature, and immersed into distilled water for the remainder of the 24-h period at 37 degrees C. Surface roughness of the soft denture lining materials was measured by contact type surface roughness instrument. For the colour stability test, soft denture lining materials were immersed in the denture cleansers as described above for 180 days. Finally, the colour changes of each material were quantitatively measured by a photometrical instrument to obtain the colour differences between newly processed specimen and immersed specimens (P < 0.01). An autopolymerizing silicone material, Evatouch, exhibited severe changes in surface roughness by all denture cleanser, and the generic material GC Denture Relining showed the minimal changes. Severe colour changes were also observed with some liner and cleanser combinations (P < 0.01). Except for Evatouth, the four silicone soft liners were more stable in surface roughness and in colour change than the two acrylic soft liners. One autopolymerizing silicone (GC denture relining) and one heat curing silicone (Molloplast B) demonstrated the best stability.
Collapse
Affiliation(s)
- C Jin
- Department of Prosthetic Dentistry, Hiroshima University Faculty of Dentistry, Hiroshima, Japan
| | | | | | | | | | | |
Collapse
|
49
|
Allen EP, Bayne SC, Becker IM, Donovan TE, Hume WR, Kois JC. Annual review of selected dental literature: report of the Committee on Scientific Investigation of the American Academy of Restorative Dentistry. J Prosthet Dent 2000; 84:59-92. [PMID: 10898844 DOI: 10.1067/mpr.2000.107084] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- E P Allen
- Department of Periodontics, Baylor College of Dentistry, The Texas A&M University System, Dallas, Texas, USA.
| | | | | | | | | | | |
Collapse
|