1
|
Shah K, Lawson NC, Sayed Ahmed A, Nizami B, Lawson TJ, Kee E, Nejat AH. Wear of lithium disilicate opposed by various ceramic materials. J ESTHET RESTOR DENT 2024; 36:356-362. [PMID: 37526391 DOI: 10.1111/jerd.13115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 06/27/2023] [Accepted: 07/14/2023] [Indexed: 08/02/2023]
Abstract
OBJECTIVES To compare volumetric wear of lithium disilicate against different ceramic (3 mol% yttria-stabilized (3Y) zirconia, 5 mol% yttria-stabilized (5Y) zirconia, lithium disilicate, porcelain and enamel antagonists). MATERIALS AND METHODS Forty lithium disilicate (e.max CAD) specimens (n = 8/antagonist) were wet sanded to 1200grit SiC and mounted into a UAB wear device. Antagonist spheres (diameter = 4.75 mm) were made from polished 3Y zirconia, 5Y zirconia, lithium disilicate, porcelain and human enamel. A two-body wear test was performed with 20 N load and 1.5 mm slide for 400,000 cycles at 1 Hz. 33% glycerin was used as a lubricant. Wear facets were measured with optical profilometry. Wear scar areas of antagonists were measured with digital microscopy. Scanning electron microscopy was performed on wear facets and scars. Vicker's microhardness was measured of all antagonist materials. All data were compared with 1-way ANOVA and Tukey post-hoc analysis. RESULTS Significant differences in lithium disilicate volumetric wear (mm3 ) occurred with various antagonist materials: 0.38 ± 0.01a (3Y zirconia), 0.33 ± 0.01b, (5Y zirconia), 0.16 ± 0.01c (lithium disilicate), 0.11 ± 0.03d, (enamel), and 0.07 ± 0.01e (porcelain). The lithium disilicate antagonist demonstrated a larger wear scar than other materials. Zirconia was the hardest material and enamel the least hard. CONCLUSIONS Zirconia causes significant wear on lithium disilicate and lithium disilicate causes significant wear against itself. CLINICAL SIGNIFICANCE When selecting a material to oppose an existing lithium disilicate crown, a porcelain or lithium disilicate surface would cause significantly less wear to the existing crown. If an existing zirconia crown exists opposed to a prepared tooth, lithium disilicate may not be an ideal material selection to restore the tooth.
Collapse
Affiliation(s)
- Krisha Shah
- Division of Biomaterials, UAB School of Dentistry, Birmingham, Alabama, USA
| | - Nathaniel C Lawson
- Division of Biomaterials, UAB School of Dentistry, Birmingham, Alabama, USA
| | - Akram Sayed Ahmed
- Division of Biomaterials, UAB School of Dentistry, Birmingham, Alabama, USA
| | - Bushra Nizami
- Division of Biomaterials, UAB School of Dentistry, Birmingham, Alabama, USA
| | - Thomas J Lawson
- Division of Biomaterials, UAB School of Dentistry, Birmingham, Alabama, USA
| | - Edwin Kee
- Division of Prosthodontics, LSU School of Dentistry, New Orleans, Louisiana, USA
| | - Amir H Nejat
- Division of Prosthodontics, LSU School of Dentistry, New Orleans, Louisiana, USA
| |
Collapse
|
2
|
Naffah N, Ounsi H, Ozcan M, Salameh Z. Evaluation of the Color Stability of Three Resin-Ceramic Materials Using a Spectrophotometer and a Digital Photography Software. Contemp Clin Dent 2024; 15:44-50. [PMID: 38707666 PMCID: PMC11068248 DOI: 10.4103/ccd.ccd_656_18] [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: 08/27/2018] [Revised: 11/15/2018] [Accepted: 11/26/2018] [Indexed: 05/07/2024] Open
Abstract
Background Computer-aided design/computer-aided manufacturing (CAD/CAM) resin ceramics allow easier milling than glass ceramics but are suspected to be more stainable. Although Photoshop® is widely used for picture analysis, its potential for shade selection has not been properly assessed. Aim Purpose primary: To evaluate the color stability of three CAD/CAM resin ceramics and Lithium Disilicate. Secondary: to compare the color evaluation between a spectrophotometer (Vita Easyshade compact) and Photoshop software. Materials and Methods Three CAD/CAM resin ceramic materials (n = 10) and a fourth group of lithium disilicate were used. Half of each group were thermocycled (5°C and 55°C; 3000 cycles). All samples were immersed in colored beverages (coffee, tea and red wine) for 30 days. Values were obtained by spectrophotometry and photographs analyzed using Photoshop software. The parameters measured were CIEL*a*b, and the color difference (ΔE) was analyzed. A mixed model test was used to compare the results through time and materials (α = 0.05). The comparison between the spectrophotometer and Photoshop results was performed using the bivariate Pearson's correlation test. Results Lithium disilicate glass ceramic exhibited less color change (ΔE = 14) than resin ceramics (15.7 < ΔE < 18.7). The least change was noted with GC Cerasmart (ΔE = 15.7) followed by Vita Enamic (ΔE = 17*) and Brilliant Crios (ΔE = 18.7*). Spectrophotometer and Photoshop values showed low correlations. Conclusions Resin ceramics may suffer from color change in clinical use. Photoshop is technique sensitive; pictures are easily affected by the light conditions and camera settings.
Collapse
Affiliation(s)
- Nicolas Naffah
- Department of Prosthodontics, Faculty of Dental Medicine, Lebanese University, Beirut, Lebanon
| | - Hani Ounsi
- Department of Endodontics, Faculty of Dental Medicine, Lebanese University, Beirut, Lebanon
- Faculty of Dental Medicine, Siena University, Siena, Italy
| | - Mutlu Ozcan
- University of Zurich, Division of Dental Biomaterials, Clinic of Reconstructive Dentistry, Center of Dental Medicine, Zurich, Switzerland
| | - Ziad Salameh
- Department of Prosthodontics, Faculty of Dental Medicine, Lebanese University, Beirut, Lebanon
| |
Collapse
|
3
|
Kosewski P, De Angelis F, Sorrentino E, Mielczarek A, Buonvivere M, D’Arcangelo C. Effect of the Abutment Rigidity on the Wear Resistance of a Lithium Disilicate Glass Ceramic: An In Vitro Study. J Funct Biomater 2023; 14:395. [PMID: 37623640 PMCID: PMC10455685 DOI: 10.3390/jfb14080395] [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: 06/29/2023] [Revised: 07/20/2023] [Accepted: 07/21/2023] [Indexed: 08/26/2023] Open
Abstract
Lithium disilicate (LDS) glass ceramics are among the most common biomaterials in conservative dentistry and prosthodontics, and their wear behavior is of paramount clinical interest. An innovative in vitro model is presented, which employs CAD/CAM technology to simulate the periodontal ligament and alveolar bone. The model aims to evaluate the effect of the abutment rigidity on the wear resistance of the LDS glass ceramic. Two experimental groups (LDS restorations supported by dental implants, named LDS-on-Implant, or by hybrid ceramic tooth replicas with artificial periodontal ligament, named LDS-on-Tooth-Replica) and a control group (LDS-Cylinders) were compared. Fifteen samples (n = 15) were fabricated for each group and subjected to testing, with LDS antagonistic cusps opposing them over 120,000 cycles using a dual axis chewing simulator. Wear resistance was analyzed by measuring the vertical wear depth (mm) and the volume loss (mm3) on each LDS sample, as well as the linear antagonist wear (mm) on LDS cusps. Mean values were calculated for LDS-Cylinders (0.186 mm, 0.322 mm3, 0.220 mm, respectively), LDS-on-Implant (0.128 mm, 0.166 mm3, 0.199 mm, respectively), and LDS-on-Tooth-Replica (0.098 mm, 0.107 mm3, 0.172 mm, respectively) and compared using one-way-ANOVA and Tukey's tests. The level of significance was set at 0.05 in all tests. Wear facets were inspected under a scanning electron microscope. Data analysis revealed that abutment rigidity was able to significantly affect the wear pattern of LDS, which seems to be more intense on rigid implant-abutment supports compared to resilient teeth replicas with artificial periodontal ligament.
Collapse
Affiliation(s)
| | - Francesco De Angelis
- Unit of Restorative Dentistry and Endodontics, Department of Medical, Oral and Biotechnological Science, School of Dentistry, “G. D’Annunzio” University of Chieti, 66100 Chieti, Italy; (M.B.); (C.D.)
| | - Edoardo Sorrentino
- Department of Innovative Technologies in Medicine & Dentistry, “G. D’Annunzio” University of Chieti, 66100 Chieti, Italy;
| | - Agnieszka Mielczarek
- Department of Conservative Dentistry, Medical University of Warsaw, 02091 Warsaw, Poland;
| | - Matteo Buonvivere
- Unit of Restorative Dentistry and Endodontics, Department of Medical, Oral and Biotechnological Science, School of Dentistry, “G. D’Annunzio” University of Chieti, 66100 Chieti, Italy; (M.B.); (C.D.)
| | - Camillo D’Arcangelo
- Unit of Restorative Dentistry and Endodontics, Department of Medical, Oral and Biotechnological Science, School of Dentistry, “G. D’Annunzio” University of Chieti, 66100 Chieti, Italy; (M.B.); (C.D.)
| |
Collapse
|
4
|
Tokunaga J, Ikeda H, Nagamatsu Y, Awano S, Shimizu H. Wear of Polymer-Infiltrated Ceramic Network Materials against Enamel. MATERIALS 2022; 15:ma15072435. [PMID: 35407767 PMCID: PMC8999962 DOI: 10.3390/ma15072435] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 03/16/2022] [Accepted: 03/23/2022] [Indexed: 12/25/2022]
Abstract
Polymer-infiltrated ceramic network materials (PICNs) have high mechanical compatibility with human enamel. However, the wear properties of PICN against natural human enamel have not yet been clarified. We investigated the in vitro two-body wear behaviors of PICNs and an enamel antagonist. Two PICNs were used: Experimental PICN (EXP) prepared via the infiltration of methacrylate-based resin into the porous silica ceramic network and commercial Vita Enamic (ENA). Two commercial dental ceramics, lithium disilicate glass (LDS) and zirconia (ZIR), were also characterized, and their wear performance was compared to PICNs. The samples were subjected to Vickers hardness tests and two-body wear tests that involve the samples being cyclically impacted by enamel antagonists underwater at 37 °C. The results reveal that the Vickers hardness of EXP (301 ± 36) was closest to that of enamel (317 ± 17). The volumetric wear losses of EXP and ENA were similar to those of LDS but higher than that of zirconia. The volumetric wear loss of the enamel antagonist impacted against EXP was moderate among the examined samples. These results suggest that EXP has wear behavior similar to that of enamel. Therefore, PICNs are mechanically comparable to enamel in terms of hardness and wear and are excellent tooth-restoration materials.
Collapse
Affiliation(s)
- Jumpei Tokunaga
- Division of Biomaterials, Department of Oral Functions, Kyushu Dental University, Fukuoka 803-8580, Japan; (J.T.); (Y.N.); (H.S.)
- Division of Clinical Education Development and Research, Department of Oral Functions, Kyushu Dental University, Fukuoka 803-8580, Japan;
| | - Hiroshi Ikeda
- Division of Biomaterials, Department of Oral Functions, Kyushu Dental University, Fukuoka 803-8580, Japan; (J.T.); (Y.N.); (H.S.)
- Correspondence:
| | - Yuki Nagamatsu
- Division of Biomaterials, Department of Oral Functions, Kyushu Dental University, Fukuoka 803-8580, Japan; (J.T.); (Y.N.); (H.S.)
| | - Shuji Awano
- Division of Clinical Education Development and Research, Department of Oral Functions, Kyushu Dental University, Fukuoka 803-8580, Japan;
| | - Hiroshi Shimizu
- Division of Biomaterials, Department of Oral Functions, Kyushu Dental University, Fukuoka 803-8580, Japan; (J.T.); (Y.N.); (H.S.)
| |
Collapse
|
5
|
Kihara T, Ikawa T, Shigeta Y, Shigemoto S, Ihara K, Sasaki K, Hirai K, Ogawa T. Considerations for the selection of interim restoration materials using wear test results. J Prosthodont Res 2021; 66:176-183. [PMID: 34321371 DOI: 10.2186/jpr.jpr_d_20_00103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
PURPOSE The purpose of this study was to examine the wear of resin materials using two-body wear tests and to verify a selection method for optimal interim restoration materials from findings of a diagnostic occlusal dev ice. METHODS Specimens were prepared from nine different resins used for diagnostic occlusal devices (soft resin) and interim restorations. Wear tests were conducted using an abrasion testing machine. The resulting wear on resin specimens and antagonist stainless-steel styluses was measured using a laser confocal scanning microscope, and the surface conditions were observed through a scanning electron microscope. The data were analyzed with one-way ANOVA and Tukey's multiple comparison test. The findings of the previous study on diagnostic occlusal devices were referred to in order to verify the selection method of optimal interim restoration materials. RESULTS The maximum wear depth of the soft resin specimens was significantly greater than that of the other specimens (p<0.05) and was equivalent to the wear depth of a diagnostic occlusal device used for 14 nights. The wear of bis-acryl resin material was shallower than that of the other materials (Polymethyl methacrylate and polyethyl methacrylate), and its antagonist stylus was significantly worn (p<0.05). CONCLUSIONS The findings of the previous and present studies showed a relationship among the parameters of Electromyography, wear depth of the diagnostic occlusal device, and wear of materials used for interim restorations. Findings related to bruxism can guide in the selection of interim restoration material and the determination of a suitable duration of wear.
Collapse
Affiliation(s)
- Takuya Kihara
- Department of Fixed Prosthodontics, School of Dental Medicine, Tsurumi University, Yokohama
| | - Tomoko Ikawa
- Department of Fixed Prosthodontics, School of Dental Medicine, Tsurumi University, Yokohama
| | - Yuko Shigeta
- Department of Fixed Prosthodontics, School of Dental Medicine, Tsurumi University, Yokohama
| | - Shuji Shigemoto
- Department of Fixed Prosthodontics, School of Dental Medicine, Tsurumi University, Yokohama
| | - Keisuke Ihara
- Dental Technician Training Institute, School of Dental Medicine, Tsurumi University, Yokohama
| | - Keita Sasaki
- Department of Fixed Prosthodontics, School of Dental Medicine, Tsurumi University, Yokohama
| | - Kentaro Hirai
- Department of Fixed Prosthodontics, School of Dental Medicine, Tsurumi University, Yokohama
| | - Takumi Ogawa
- Department of Fixed Prosthodontics, School of Dental Medicine, Tsurumi University, Yokohama
| |
Collapse
|
6
|
Effects of surface roughness on the time-dependent wear performance of lithium disilicate glass ceramic for dental applications. J Mech Behav Biomed Mater 2021; 121:104638. [PMID: 34171718 DOI: 10.1016/j.jmbbm.2021.104638] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 05/31/2021] [Accepted: 06/05/2021] [Indexed: 11/21/2022]
Abstract
OBJECTIVES Purpose of the present study was to evaluate the effect of surface roughness on the time-dependent wear performance of lithium disilicate (LD) glass-ceramic. METHODS Friction pairs (pin and disk specimens) were prepared by IPS e.max® Press lithium disilicate glass-ceramic. The lateral faces of friction pairs (N = 12) were grinded with silicon carbide papers, and 6 friction pairs were polished with a 0.25 μm diamond suspension after grinding. The friction pairs were tested for wear performance using a pin-on-disk tribometer with 10 N for 1.02 × 106 wear cycles in artificial saliva. Wear analysis of the pin and disk was performed with a 3D profilometer. The microstructure and worn surface morphology were examined with scanning electron microscopy. One-way analysis of variance and Tukey's post-hoc pairwise comparison were used to analyze the wear data. RESULTS The two group LD friction pairs presented strong time-dependent wear performance. The polished group (GP) exhibited a high wear rate and extensive surface wear during 0-1 × 105 cycles (running-in wear stage). The wear rate, height loss and surface roughness were obviously lower than those of grinded group (GG) in running-in wear stage. However, these wear parameters were similar during the steady wear stage. The worn surface topographies of the pin and disk in GP were smoother at the same cycle before the GG entering the steady wear stage. CONCLUSION Running-in, which means the initial stage of wear process, is a critical period to determine the final wear loss and surface degradation, when compare the wear behavior of lithium disilicate ceramic with different initial surface states. Ceramic layer with smooth contact area leads to low wear rate and short running-in wear stage.
Collapse
|
7
|
Wiedenmann F, Böhm D, Eichberger M, Edelhoff D, Stawarczyk B. Influence of different surface treatments on two-body wear and fracture load of monolithic CAD/CAM ceramics. Clin Oral Investig 2020; 24:3049-3060. [PMID: 31836916 DOI: 10.1007/s00784-019-03173-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Accepted: 12/04/2019] [Indexed: 11/26/2022]
Abstract
OBJECTIVES To investigate two-body wear (2BW) and fracture load (FL) of monolithic ceramics after different surface pretreatments. MATERIALS AND METHODS Zirconia (MOZ), lithium-disilicate (LIT), and leucite-reinforced (LEU) specimens (n = 60/group) were manufactured with CAD/CAM-technology and underwent (n = 15/subgroup): 1) grinding + polishing (GrPo), 2) grinding + glazing (GrGz), 3) grinding (Gr), or 4) glazing (Gz). Scanning electron microscope (n = 3/subgroup) and 3D measurements of the ceramic crowns and antagonists (N = 180) were performed to determine 2BW before and after 120,000/1,200,000 masticatory cycles. FL was examined for all specimens (N = 180). Data were analyzed using Kolmogorov-Smirnov, one-way ANOVA, Scheffé post hoc, Kruskal-Wallis, Mann-Whitney-U, and Wilcoxon (p < 0.05). RESULTS MOZ presented the highest FL independent on pretreatment (6960-9250 N), while LEU (1405-2320 N) showed the lowest (p < 0.001). Ceramic and antagonist wear increased between 120,000 and 1,200,000 masticatory cycles (p < 0.001). For pretreatments GrPo, GrGz, and Gz, MOZ showed the lowest wear of the ceramic, while causing the highest antagonist wear (p < 0.001). GrPo resulted in the lowest wear for MOZ (p < 0.001), with Gr leading to the highest antagonist wear (p = 0.008). LIT specimens presented the highest wear of the ceramic and antagonist after Gz (p < 0.001), while GrPo resulted in the lowest antagonist wear (p < 0.001). GrGz led to the highest antagonist wear for LEU (p < 0.001). CONCLUSIONS With FL exceeding maximum masticatory forces, the three tested ceramics can be recommended for restorations, even in posterior regions. While glazing resulted in higher wear and impaired FL, polishing improved mechanical properties while largely preserving the antagonist. CLINICAL RELEVANCE While surface pretreatment after grinding is vital to ensure a ceramic's optimal mechanical properties, glazing and polishing varies with regard to material properties, costs, and time.
Collapse
Affiliation(s)
- Felicitas Wiedenmann
- Department of Prosthetic Dentistry, University Hospital, LMU Munich, Goethestraße 70, 80336, Munich, Germany.
| | - Denise Böhm
- Department of Prosthetic Dentistry, University Hospital, LMU Munich, Goethestraße 70, 80336, Munich, Germany
- Private Practice, Munich, Germany
| | - Marlis Eichberger
- Department of Prosthetic Dentistry, University Hospital, LMU Munich, Goethestraße 70, 80336, Munich, Germany
| | - Daniel Edelhoff
- Department of Prosthetic Dentistry, University Hospital, LMU Munich, Goethestraße 70, 80336, Munich, Germany
| | - Bogna Stawarczyk
- Department of Prosthetic Dentistry, University Hospital, LMU Munich, Goethestraße 70, 80336, Munich, Germany
| |
Collapse
|
8
|
HAYASHI S, HOMMA S, TAKANASHI T, HIRANO T, YOSHINARI M, YAJIMA Y. Wear properties of esthetic dental materials against translucent zirconia. Dent Mater J 2019; 38:250-256. [DOI: 10.4012/dmj.2018-133] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Shota HAYASHI
- Department of Oral and Maxillofacial Implantology, Tokyo Dental College
- Oral Health Science Center, Tokyo Dental College
| | - Shinya HOMMA
- Department of Oral and Maxillofacial Implantology, Tokyo Dental College
- Oral Health Science Center, Tokyo Dental College
| | - Takuya TAKANASHI
- Department of Oral and Maxillofacial Implantology, Tokyo Dental College
| | - Tomoki HIRANO
- Department of Oral and Maxillofacial Implantology, Tokyo Dental College
- Oral Health Science Center, Tokyo Dental College
| | | | - Yasutomo YAJIMA
- Department of Oral and Maxillofacial Implantology, Tokyo Dental College
- Oral Health Science Center, Tokyo Dental College
| |
Collapse
|
9
|
Wear Behavior of Ceramic CAD/CAM Crowns and Natural Antagonists. MATERIALS 2017; 10:ma10030244. [PMID: 28772602 PMCID: PMC5503368 DOI: 10.3390/ma10030244] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Revised: 02/23/2017] [Accepted: 02/25/2017] [Indexed: 11/16/2022]
Abstract
OBJECTIVE Evaluation of wear behavior of computer-aided design/computer-aided manufacturing (CAD/CAM) crowns from various restorative materials and natural antagonists. METHOD Full CAD/CAM crowns fabricated with nanoceramic resin (Lava Ultimate (LU)), a glass ceramic in a resin interpenetrating matrix (Vita Enamic (VE)) and a lithium silicate reinforced ceramic enriched with zirconia (Vita Suprinity (VS)) were cemented on human molars. The crown and antagonists were subjected to simulated chewing. 3D data sets, before and after the chewing simulation, were generated and matched. Occlusal surface roughness, vertical and volume loss of the crowns and antagonists were analyzed. RESULTS Crown roughness was significantly different between the LU and VE groups after chewing simulation. Crown vertical loss differed in all groups. The highest crown volume loss was found in the LU group, and the lowest in the VE group. Comparisons between the LU and VE groups and the LU and VS groups were significantly different. The highest antagonist volume loss was reached in the VE group, the lowest was in the LU group. CONCLUSION Roughness increased after chewing simulation. LU crowns are the most natural antagonist-friendly; these were the most susceptible to vertical and volume loss. Of the tested materials, the VE crowns are the most stable regarding occlusion.
Collapse
|