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Fayad BR, Zohdy MM, Hussein GA, Farag EA. Color stability and marginal adaptation of ceramic veneers cemented using different composite resins. Minerva Dent Oral Sci 2024; 73:88-95. [PMID: 37066892 DOI: 10.23736/s2724-6329.23.04761-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/18/2023]
Abstract
BACKGROUND The purpose of this study was to compare the color stability and marginal adaption of lithium disilicate veneers before and after thermocycling using various resin composite materials employed as cement. METHODS Laminate veneer preparation was done on an acrylic tooth according to standardized procedures. The veneer preparations were duplicated into twenty-one dies. The veneers were fabricated from lithium disilicate using the CEREC in Lab system. According to the cement type, the twenty-one die specimens were randomly divided into three equal groups: group I, with light cured adhesive resin cement (N.=7), group II, with flowable light cured composite, and group III, with preheated nano filled composite. The cemented specimens underwent 5000 thermocycling cycles. Color was assessed using a reflective spectrophotometer. The vertical marginal gap, following cementation and thermocycling, was measured using a digital microscope. One-way ANOVA followed by Tukey's post-hoc test was used to statistically assess the data. RESULTS After thermocycling, there was no statistically significant difference in ΔE among cement type groups for color stability (P=0.369). However, the preheated composite showed the lowest ΔE mean values. Within adhesive resin cement and flowable composite groups, marginal gap means values recorded after thermocycling were significantly higher than those after cementation (P=0.013 and P<0.001, respectively). CONCLUSIONS Although preheated composite cement showed the highest marginal discrepancy, it would be the best choice regarding color stability.
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Affiliation(s)
- Basma R Fayad
- Department of Fixed Prosthodontics, British University, Cairo, Egypt -
| | - Maged M Zohdy
- Department of Fixed Prosthodontics, British University, Cairo, Egypt
- Department of Fixed Prosthodontics, Faculty of Dentistry, Ain Shams University, Cairo, Egypt
| | - Ghada A Hussein
- Department of Fixed Prosthodontics, Faculty of Dentistry, Ain Shams University, Cairo, Egypt
| | - Engy A Farag
- Department of Fixed Prosthodontics, British University, Cairo, Egypt
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Ahmed WM, Azhari AA, Sedayo L, Alhaid A, Alhandar R, Almalki A, Jahlan A, Almutairi A, Kheder W. Mapping the Landscape of the Digital Workflow of Esthetic Veneers from Design to Cementation: A Systematic Review. Dent J (Basel) 2024; 12:28. [PMID: 38392232 PMCID: PMC10888163 DOI: 10.3390/dj12020028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Revised: 12/27/2023] [Accepted: 01/26/2024] [Indexed: 02/24/2024] Open
Abstract
The purpose of this systematic review was to map all the existing literature on digitally designed and fabricated esthetic veneers. We aimed to compare the accuracy of digitally designed preparation and cementation guides for esthetic indirect veneers with the conventional workflow. We evaluated studies comparing the accuracy and predictability of workflows between digitally fabricated indirect-esthetic veneers and conventional indirect veneers. Searches were performed in August 2023 across three databases, specifically Google Scholar, Cochrane, and PubMed, and were restricted to English-language publications. The search strategy was based on the PICO criteria. Reference lists of identified articles were manually checked to find further pertinent studies that were not discovered during the electronic search. The titles and abstracts were reviewed in the first stage, and then the full article texts were reviewed and cross-matched against the predetermined inclusion criteria. Following the search, 169 articles were identified: 41 from Google Scholar, 44 from Cochrane, and 71 from PubMed, with 13 added manually. Of these, 20 were chosen for a detailed quality assessment of the digital veneer workflow and the accuracy of digital preparations and cementation guides for laminate veneers. Based on our findings, the digitally fabricated laminate-veneer workflow demonstrated superior predictability and accuracy compared to the conventional workflow.
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Affiliation(s)
- Walaa Magdy Ahmed
- Department of Restorative Dentistry, Faculty of Dentistry, King Abdulaziz University, Jeddah P.O. Box 80213, Saudi Arabia
| | - Amr Ahmed Azhari
- Department of Restorative Dentistry, Faculty of Dentistry, King Abdulaziz University, Jeddah P.O. Box 80213, Saudi Arabia
| | - Lamer Sedayo
- Faculty of Dental Medicine, Umm Al-Qura University, Makkah P.O. Box 16786, Saudi Arabia
| | - Alanod Alhaid
- Dental Department, King Khalid University, Asir P.O. Box 61421, Saudi Arabia
| | - Reem Alhandar
- Dental Department, Vision College, Riyadh P.O. Box 13226, Saudi Arabia
| | - Amirah Almalki
- Dental Department, Specialized Dental Complex, Jeddah P.O. Box 21444, Saudi Arabia
| | - Aishah Jahlan
- Department of Restorative Dentistry, Suliman Al-Habib Hospital, Riyadh P.O. Box 301578, Saudi Arabia
| | - Afnan Almutairi
- Department of Restorative Dentistry, Suliman Al-Habib Hospital, Riyadh P.O. Box 301578, Saudi Arabia
| | - Waad Kheder
- Department of Restorative Dentistry, College of Dental Medicine, University of Sharjah, Sharjah P.O. Box 27272, United Arab Emirates
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Măroiu AC, Jivănescu A, Șerban DA, Negru RM, Duma VF, Sinescu C, Romînu M. The Influence of a Novel, Crenelated Design of CAD-CAM Ceramic Veneers on the Debonding Strength. Materials (Basel) 2023; 16:ma16103694. [PMID: 37241322 DOI: 10.3390/ma16103694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2023] [Revised: 05/06/2023] [Accepted: 05/09/2023] [Indexed: 05/28/2023]
Abstract
(1) Background: Aesthetic dentistry has become one of the most dynamic fields in modern dental medicine. Ceramic veneers represent the most appropriate prosthetic restorations for smile enhancement, due to their minimal invasiveness and highly natural appearance. For long-term clinical success, accurate design of both tooth preparation and ceramic veneers is of paramount importance. The aims of this in vitro study were to assess the stress in anterior teeth restored with Computer-Aided Design (CAD) and Computer-Aided Manufacturing (CAM) ceramic veneers and compare the resistance to detachment and the fracture of ceramic veneers prepared using two different designs. (2) Methods: Sixteen lithium disilicate ceramic veneers were designed and milled using the CAD-CAM technology and divided into two groups according to the preparations (n = 8): Group 1, conventional (CO), with linear marginal contour and Group 2, crenelated (CR), the latter with our novel (patented) sinusoidal marginal design. All samples were bonded to anterior natural teeth. The mechanical resistance to detachment and fracture was investigated by applying bending forces on the incisal margin of the veneers in order to determine which type of preparation leads to better adhesion. An analytic method was employed, as well, and the results of the two approaches were compared. (3) Results: The mean values of the maximum force recorded at the veneer detachment were 78.82 ± 16.55 N for the CO group and 90.20 ± 29.81 N for the CR group. The relative increase, equal to 14.43%, demonstrated that the novel CR tooth preparation provided higher adhesive joints. In order to determine the stress distribution within the adhesive layer, a finite element analysis (FEA) was performed. The statistical t-test showed that the mean value of the maximum normal stresses is higher for the CR-type preparations. (4) Conclusions: The patented CR veneers represent a practical solution to augment the adhesion and mechanical properties of ceramic veneers. The obtained results demonstrated that CR adhesive joints triggered higher mechanical and adhesive forces, which subsequently led to a higher resistance to detachment and fracture.
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Affiliation(s)
- Alexandra-Cristina Măroiu
- Research Center in Dental Medicine Using Conventional and Alternative Technologies, School of Dental Medicine, "Victor Babes" University of Medicine and Pharmacy of Timisoara, 9 Revolutiei 1989 Ave., 300070 Timisoara, Romania
- Department of Prosthodontics, "Victor Babes" University of Medicine and Pharmacy, 9 Revolutiei 1989 Ave., 300070 Timisoara, Romania
| | - Anca Jivănescu
- Department of Prosthodontics, "Victor Babes" University of Medicine and Pharmacy, 9 Revolutiei 1989 Ave., 300070 Timisoara, Romania
- TADERP Research Center, 300041 Timisoara, Romania
| | - Dan-Andrei Șerban
- Faculty of Mechanics, Polytechnic University of Timisoara, 1 Mihai Viteazu Ave., 300222 Timisoara, Romania
| | - Radu-Marcel Negru
- Faculty of Mechanics, Polytechnic University of Timisoara, 1 Mihai Viteazu Ave., 300222 Timisoara, Romania
| | - Virgil-Florin Duma
- 3OM Optomechatronics Group, Faculty of Engineering, "Aurel Vlaicu" University of Arad, Str. Elena Dragoi No. 2, 310177 Arad, Romania
- Doctoral School, Polytechnic University of Timisoara, 1 Mihai Viteazu Ave., 300222 Timisoara, Romania
| | - Cosmin Sinescu
- Research Center in Dental Medicine Using Conventional and Alternative Technologies, School of Dental Medicine, "Victor Babes" University of Medicine and Pharmacy of Timisoara, 9 Revolutiei 1989 Ave., 300070 Timisoara, Romania
| | - Mihai Romînu
- Research Center in Dental Medicine Using Conventional and Alternative Technologies, School of Dental Medicine, "Victor Babes" University of Medicine and Pharmacy of Timisoara, 9 Revolutiei 1989 Ave., 300070 Timisoara, Romania
- Department of Prostheses Technology and Dental Materials, "Victor Babes" University of Medicine and Pharmacy, 9 Revolutiei 1989 Ave., 300070 Timisoara, Romania
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Jánosi KM, Cerghizan D, Rétyi Z, Kovács A, Szász A, Mureșan I, Albu AI, Hănțoiu LG. Influence of the Operator`s Experience, Working Time, and Working Position on the Quality of the Margin Width: In Vitro Study. Medicina (Kaunas) 2023; 59:medicina59020244. [PMID: 36837447 PMCID: PMC9966406 DOI: 10.3390/medicina59020244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 01/24/2023] [Accepted: 01/24/2023] [Indexed: 01/31/2023]
Abstract
Background and Objectives: Appropriate tooth preparation is mandatory to obtain a perfect marginal fit of fixed restorations. The heavy chamfer is the most commonly used finish line, especially for minimally invasive tooth preparation. The aim of the study was to compare the width of the finish line obtained during tooth preparation performed by experienced (university lecturers) and inexperienced persons (dental students) in different working times and positions. Materials and Methods: Forty left upper-second molars were prepared on the simulator by each participant, totalizing 160 prepared teeth. A new round-end tapered diamond was used to obtain the 0.5 mm width of the heavy chamfer. The prepared teeth were photographed using a Canon D5300 camera with a macro lens attached to a tripod. The measurements were made with the Image-Pro Insight software selecting the same eight reference points. From these points, perpendicular lines were drawn above the finish line to the axial walls and the distance between the chamfer's outer edge and the axial wall's inner edge was measured. GraphPad Instat and NCSS Dowson Edition software were used. The statistical significance was set at p < 0.05. The mean (M) and standard deviation (SD) were calculated. The used tests: one sample t-test, ANOVA test, and Tukey-Kramer Multiple Comparisons Test. Results: Statistically significant differences were obtained according to the experience of the participant, preparation time, patient's position, and the chamfer width on the prepared tooth different surfaces. Conclusions: Daytime or weeklong tiredness and patient position do not affect the width of the heavy chamfer prepared by experienced and inexperienced persons. The experience and the operator's working position influence the width of the prepared finish line.
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Affiliation(s)
- Kinga Mária Jánosi
- Faculty of Dental Medicine, George Emil Palade University of Medicine, Pharmacy, Science, and Technology of Targu Mures, 38 Gh. Marinescu Str., 540142 Targu Mures, Romania
| | - Diana Cerghizan
- Faculty of Dental Medicine, George Emil Palade University of Medicine, Pharmacy, Science, and Technology of Targu Mures, 38 Gh. Marinescu Str., 540142 Targu Mures, Romania
- Correspondence: ; Tel.: +4-07-400-768-76
| | - Zsigmond Rétyi
- Independent Researcher, SC Fusion Dental Clinic SRL, 520089 Sfantu Gheorghe, Romania
| | - Alpár Kovács
- Independent Researcher, SC Maxdent Office SRL, 540501 Targu Mures, Romania
| | - Andrea Szász
- Independent Researcher, SC Maxdent Office SRL, 540501 Targu Mures, Romania
| | - Izabella Mureșan
- Faculty of Dental Medicine, George Emil Palade University of Medicine, Pharmacy, Science, and Technology of Targu Mures, 38 Gh. Marinescu Str., 540142 Targu Mures, Romania
| | - Aurița Ioana Albu
- Faculty of Dental Medicine, George Emil Palade University of Medicine, Pharmacy, Science, and Technology of Targu Mures, 38 Gh. Marinescu Str., 540142 Targu Mures, Romania
| | - Liana Georgiana Hănțoiu
- Faculty of Dental Medicine, George Emil Palade University of Medicine, Pharmacy, Science, and Technology of Targu Mures, 38 Gh. Marinescu Str., 540142 Targu Mures, Romania
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Doriguêtto PVT, de Almeida D, de Lima CO, Lopes RT, Devito KL. Assessment of marginal gaps and image quality of crowns made of two different restorative materials: An in vitro study using CBCT images. J Dent Res Dent Clin Dent Prospects 2022; 16:243-250. [PMID: 37560496 PMCID: PMC10407872 DOI: 10.34172/joddd.2022.039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Accepted: 10/18/2022] [Indexed: 08/11/2023] Open
Abstract
Background The present study assessed the quality of images and the presence of marginal gaps on cone-beam computed tomography (CBCT) images of teeth restored with all-ceramic and metal-ceramic crowns and compared the gap sizes observed on CBCT images with those obtained on micro-CT images. Methods Thirty teeth restored with metal-ceramic and all-ceramic crowns, properly adapted and with gaps of 0.30 and 0.50 mm, were submitted to micro-CT and CBCT scans. Linear measurements corresponding to the marginal gap (MG) and the absolute marginal discrepancy (AMD) were obtained. The objective assessment of the quality of CBCT images was performed using the contrast-to-noise ratio (CNR), and the subjective assessment was defined by the diagnoses made by five examiners regarding the presence or absence of gaps. Results The measurements were always higher for CBCT, with a significant difference regarding AMD. No significant difference in image quality was observed using CNR between the crowns tested. Low accuracy and sensitivity values could be observed for both crowns. Conclusion Marginal mismatch measures were overestimated in CBCT images. No difference in image quality was observed between the crowns. The correct diagnosis of gaps was considered low, irrespective of crown type and gap size.
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Affiliation(s)
| | - Daniela de Almeida
- School of Dentistry, Federal University of Juiz de Fora, Juiz de Fora, Minas Gerais, Brazil
| | | | - Ricardo Tadeu Lopes
- Nuclear Engineering Department, COPPE, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Karina Lopes Devito
- Department of Dental Clinic, School of Dentistry, Federal University of Juiz de Fora, Juiz de Fora, Minas Gerais, Brazil
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Gaile M, Papia E, Zalite V, Locs J, Soboleva U. Resin Cement Residue Removal Techniques: In Vitro Analysis of Marginal Defects and Discoloration Intensity Using Micro-CT and Stereomicroscopy. Dent J (Basel) 2022; 10:55. [PMID: 35448050 PMCID: PMC9027873 DOI: 10.3390/dj10040055] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Revised: 03/02/2022] [Accepted: 03/15/2022] [Indexed: 01/27/2023] Open
Abstract
The objective was to compare marginal defects and evaluate discoloration for adhesively cemented veneers in vitro when using two cement removal techniques. Twenty premolars were prepared with chamfer and borders in enamel. IPS e.max CAD veneers were cemented using Panavia V5 and divided in two groups (n = 10): cement excess removed with a probe after tack-curing for 3–5 s, or cement excess removed with a brush, then completely polymerized. All teeth were stored in alginate gel until micro-CT examination. Scanning was performed twice: directly after cementation and after thermocycling (5000 cycles, between 5 and 55 °C). To analyze discoloration, teeth were colored using 0.5% basic fuchsine and examined under a stereomicroscope. Depth of dye infiltration was scored 0 (no discoloration) to 5 (discoloration along the entire margin). Statistically significant differences of cement defects before thermocycling were reported, where brushing showed more defects than probing (p = 0.0161). After thermocycling, the defects increased for both groups. Extensive discoloration was the most common (55.56%) when removing excess by probing; by brushing, 90% of the specimens exhibited slight discoloration (p = 0.008). Regression analysis showed no relationship between type of defect and degree of discoloration. Removing cement with a brush causes more marginal defects, however less discoloration after thermocycling.
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