Ilgın Arı, Gülin Acar, Emre Tosun, Mehmet Muhtaroğulları
{"title":"Assessment of different treatment alternatives for patients with total maxillectomy.","authors":"Ilgın Arı, Gülin Acar, Emre Tosun, Mehmet Muhtaroğulları","doi":"10.1111/jopr.13947","DOIUrl":"https://doi.org/10.1111/jopr.13947","url":null,"abstract":"<p><strong>Purpose: </strong>To assess the biomechanical advantages of combining zygoma and partial subperiosteal implants for maxillary reconstruction in severely atrophic maxillae, offering potential solutions to the challenges posed by traditional reconstruction methods.</p><p><strong>Material and methods: </strong>A finite element analysis used a craniofacial model simulating a totally resected maxilla. Four treatment scenarios (SCs) were evaluated: SC-1, the quad zygoma approach; SC-2, two zygoma implants (ZIs) and a one-piece subperiosteal implant (SI); SC-3, two ZI and a two-piece SI; and SC-4, four ZI and a one-piece SI. Stress distributions on bone, implants, abutments, and metal frameworks were compared under occlusal forces.</p><p><strong>Results: </strong>For the simulated bone regions under vertical and oblique forces, SC-4 values were higher than SC-1, while SC-2 and SC-3 values were comparable for p<sub>max</sub> and p<sub>min</sub>. In addition, SC-2 and SC-3 values were lower than those of SC-1 and SC-4. The most balanced von Mises stress values on the ZIsand were observed in SC-3 under vertical and oblique forces. Furthermore, lower von Mises stress values on the abutments were seen in SC-3 under oblique and vertical forces. Although the lower von Mises stress values on the metal frameworks at the lateral incisor and first premolar side were seen in SC-3, lower von Mises values were observed in SC-4 in the first molar region.</p><p><strong>Conclusions: </strong>Overall, this study suggests that combining zygoma and partial subperiosteal implants may be a promising approach for reconstructing severely atrophic maxillae. These implants may offer improved biomechanical properties compared to ZIs alone.</p>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142330818","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Comparative analysis of three jaw motion tracking systems: A study on precision and trueness.","authors":"Wei Zhao, Yue Feng, Rongkai Cao, Jiyu Sun, Jiayao Zhang, Xinhuan Zhao, Weicai Liu","doi":"10.1111/jopr.13953","DOIUrl":"https://doi.org/10.1111/jopr.13953","url":null,"abstract":"<p><strong>Purpose: </strong>The purpose of this study was to assess the precision and trueness of three jaw motion tracking systems, the KaVo ARCUSdigma system, SDiMatriX system, and Modjaw system, in recording mandibular movements based on optical and ultrasonic principles.</p><p><strong>Materials and methods: </strong>Twenty-five healthy subjects were selected for the present study to measure protrosive movement and left and right lateral movements using the three jaw motion tracking systems. Each subject's mandibular movement was recorded twice with a 1-week interval. Five parameters-sagittal condylar inclination (SCI) angle, incisal guide angle, Bennett angle, lateral condylar inclination angle, and Fischer's angle-were acquired for further analysis. The precision of the jaw motion tracking systems was evaluated by comparing the results of two measurements of the same parameter. Simultaneously, cone beam computed tomography (CBCT) was utilized during the initial data acquisition and was aligned with intercuspal position (ICP) and edge-to-edge occlusion intraoral scan data. Bone landmarks were used to calculate bilateral SCI as a reference for comparison with the SCI values from each jaw motion tracking system. An independent-sample t-test was conducted to compare parameter differences, with statistical significance set at a p-value below 0.05.</p><p><strong>Results: </strong>There were no significant differences among the three jaw motion tracking systems regarding the corrected values of SCI, incisal guide angle, Bennett angle, lateral condylar inclination angle, and Fischer's angle during the 1-week interval (p > 0.05). The values of bilateral SCI obtained by CBCT were 48.57 ± 6.74 (L) and 48.35 ± 5.28 (R), respectively. No significant differences were found between the reference SCI and those parameters measured by the KaVo ARCUSdigma system and the Modjaw system (p > 0.05), while the results obtained from the SDiMatriX system indicated a significant difference compared to the reference SCI (p < 0.05).</p><p><strong>Conclusions: </strong>The three jaw motion tracking systems exhibited favorable results in terms of precision. Regarding trueness, both the KaVo ARCUSdigma system and the Modjaw system demonstrated a satisfactory levels suitable for applications in digital prosthodontics within clinical settings. However, further refinement is needed to enhance the trueness of the SDiMatriX system.</p>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142330819","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Laura Lourenço Morel, Marcus Vinícius Rocha de Almeida, Karoline Moraes Dos Santos, Maryana Fernandes Praseres, Ana Luíza Gonçalves Girundi, Larissa Dolfini Alexandrino, Wander José da Silva
{"title":"Reinforcement of 3D-printed resins for denture base by adding aramid fibers: Effect on mechanical, surface, and optical properties.","authors":"Laura Lourenço Morel, Marcus Vinícius Rocha de Almeida, Karoline Moraes Dos Santos, Maryana Fernandes Praseres, Ana Luíza Gonçalves Girundi, Larissa Dolfini Alexandrino, Wander José da Silva","doi":"10.1111/jopr.13957","DOIUrl":"https://doi.org/10.1111/jopr.13957","url":null,"abstract":"<p><strong>Purpose: </strong>The present study evaluated the mechanical, surface, and optical properties of 3D-printed resins for removable prostheses reinforced by the addition of aramid fibers.</p><p><strong>Materials and methods: </strong>According to ISO 20795-1:2013 standards, specimens were printed using a digital light processing 3D printer and divided into two groups (n = 06/group): 3D-printed resin for denture base as the control group, and a group with the same 3D-printed resin in addition of 5% aramid fibers as the experimental group. Red aramid fibers were chosen for aesthetic characterization. The specimens were evaluated for their mechanical properties, such as elastic modulus (GPa), flexural strength (MPa), and superficial properties by their surface microhardness (KHN), surface roughness (μm), and surface free energy (mJ/m<sup>2</sup>). Optical properties were evaluated by the color difference (∆E00) between groups. The statistical test chosen after the exploratory analysis of the data was One-way ANOVA followed by Tukey's HSD (α = 0.05).</p><p><strong>Results: </strong>The results showed statistical differences in elastic modulus (p < 0.0001), flexural strength (p < 0.0001), surface free energy polar variable (p = 0.0322), total surface free energy (p = 0.0344), with higher values for the experimental. Surface hardness and surface roughness showed no statistical difference (p ≥ 0.05). The color difference (∆E00) obtained through the CIEDE2000 calculus was below the perceptibility threshold (≤1.1).</p><p><strong>Conclusion: </strong>Adding aramid fibers to 3D-printed resin for denture bases resulted in better mechanical properties, without major alterations in surface properties. In addition, it is an easy-to-apply choice for mechanical reinforcement and aesthetic characterization, with the expression of small blood vessels in the 3D-printed resin for removable denture bases.</p>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142330824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Nathaniel C Lawson, Yamen Safadi, Aaron Alford, Himanshi Aggarwal, Pranit V Bora, Thomas J Lawson, Daniel A Givan
{"title":"Flexural strength, fracture toughness, translucency, stain resistance, and water sorption of 3D-printed, milled, and conventional denture base materials.","authors":"Nathaniel C Lawson, Yamen Safadi, Aaron Alford, Himanshi Aggarwal, Pranit V Bora, Thomas J Lawson, Daniel A Givan","doi":"10.1111/jopr.13955","DOIUrl":"https://doi.org/10.1111/jopr.13955","url":null,"abstract":"<p><strong>Purpose: </strong>To compare mechanical, optical, and physical properties of denture base materials fabricated with various 3D printing systems to reference milled and conventionally heat-processed denture base materials.</p><p><strong>Materials and methods: </strong>Specimens of denture base materials were either 3D-printed (DLP in-office printer, CLIP laboratory printer, or material jetting laboratory printer), milled, or heat processed. 3-point bend flexural strength testing was performed after 50 hours of water storage following 1hour of drying (dry testing) or in 37°C water (wet testing). Fracture toughness was performed with a notched beam specimen after 7 days of water storage and tested dry. The translucency parameter was measured with 2 mm thick specimens. Stain resistance was measured as color change following 14 days of storage in 37°C coffee. Water sorption was measured following 7 days of storage in 37°C distilled water.</p><p><strong>Results: </strong>For dry testing, all but one of the 3D-printed materials attained higher or equivalent flexural strength as the reference materials. For wet testing, all 3D-printed materials attained higher or equivalent strength as the reference materials and dry-tested materials. For 3D-printed materials, wet testing increased displacement before fracture whereas it decreased displacement for the reference materials. Only two of the 3D-printed materials had similar fracture toughness as the reference materials. One of the 3D-printed materials was more translucent and one was more opaque than the reference materials. Only one of the 3D-printed materials absorbed more water than the reference materials.</p><p><strong>Conclusion: </strong>3D-printed denture base materials have mostly equivalent mechanical, optical, and physical properties to conventional and milled denture base materials.</p>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142330823","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"An approach for accurately orienting artificial teeth into their denture base sockets of CAD-CAM milled dentures: A dental technique.","authors":"Abdulaziz M Alqarni, Thamer Y Marghalani","doi":"10.1111/jopr.13928","DOIUrl":"https://doi.org/10.1111/jopr.13928","url":null,"abstract":"<p><p>A novel technique was devised to create a stabilizing guide to accurately maintain the position of CAD-CAM-milled artificial teeth in their denture base socket during the bonding process. This ensures that the artificial teeth and denture base are adequately bonded to reproduce the designed occlusion and reduce chair-side adjustment.</p>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142299326","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Luiz Carvalho, Ryan Becker, Udochukwu Oyoyo, Dwight D Rice, Mathew T Kattadiyil
{"title":"Identifying marginal adaptation discrepancies of lithium disilicate crowns using seven different vertical X-ray angulations.","authors":"Luiz Carvalho, Ryan Becker, Udochukwu Oyoyo, Dwight D Rice, Mathew T Kattadiyil","doi":"10.1111/jopr.13945","DOIUrl":"https://doi.org/10.1111/jopr.13945","url":null,"abstract":"<p><strong>Purpose: </strong>To study the effect of different vertical angulations on the ability to radiographically assess vertical marginal discrepancies of lithium disilicate crowns.</p><p><strong>Materials and methods: </strong>Twenty-one lithium disilicate crowns were fabricated for three different prepared natural teeth: incisor, canine, and premolar. Vertical marginal discrepancies ranging from 0 to 300 µm were intentionally created. The seated crowns were radiographed using seven different vertical angulations, totaling 147 images. Thirty experienced evaluators scored each image for marginal discrepancy, and values were statistically analyzed.</p><p><strong>Results: </strong>Significant differences in the ability to accurately assess marginal discrepancies from radiographs were observed for the study factors of angulation, tooth type, and degree of marginal discrepancy (p < 0.001).</p><p><strong>Conclusions: </strong>The radiographic interpretation of the marginal discrepancies of lithium disilicate crowns is significantly affected by the dimension of the marginal discrepancy. Specifically on premolar crowns, it is significantly affected by different vertical angulations of the X-ray beam. When evaluating marginal discrepancy on lithium disilicate crowns radiographically, vertical beam angulation within ±10° to the cemento-enamel junctionCEJ plane is recommended.</p>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142299357","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Victor Augusto Alves Bento, Pedro Antônio de Souza Rolim, José Roberto Vergínio de Matos, Cleidiel Aparecido de Araújo Lemos, Eduardo Piza Pellizzer, Aimée Maria Guiotti
{"title":"Does the surface conditioning of glass and hybrid ceramics with self-etching silane present a bond strength similar to that of conventional bonding? Systematic review and meta-analysis of in vitro studies.","authors":"Victor Augusto Alves Bento, Pedro Antônio de Souza Rolim, José Roberto Vergínio de Matos, Cleidiel Aparecido de Araújo Lemos, Eduardo Piza Pellizzer, Aimée Maria Guiotti","doi":"10.1111/jopr.13940","DOIUrl":"https://doi.org/10.1111/jopr.13940","url":null,"abstract":"<p><strong>Purpose: </strong>To evaluate, through in vitro studies, the bond strength of vitreous and hybrid ceramics with self-etching surface treatment compared to conventional treatment.</p><p><strong>Methods: </strong>This systematic review followed the preferred reporting items for systematic reviews and meta-analyses (PRISMA) and was registered on the open science framework (OSF) platform for in vitro studies. A population, intervention, control, and outcome (PICO) question was formulated: \"Does the surface conditioning of glass and hybrid ceramics with self-etching silane present a bond strength similar to that of conventional bonding?\". A literature search was carried out in the PubMed, Embase, Web of Science, Cochrane Library, and ProQuest databases until September 2023. The Joanna Briggs Institute (JBI) critical appraisal guidelines for quasi-experimental studies were used for risk assessment of bias. The meta-analysis was based on the inverse variance (IV) method (p < 0.05).</p><p><strong>Results: </strong>A total of 29 in vitro studies published between 2017 and 2022 were included in this systematic review, totaling 1889 ceramic samples. The meta-analysis indicated a significant decrease in the bond strength of HF 4%-5% with silane compared to self-etching (p < 0.05; MD: 0.34; 95% CI: 0.13-0.35; I<sup>2</sup> = 3%, p = 0.42), while it indicated that there was no significant difference between self-etching compared to 9%-10% HF with silane (p = 0.92; MD: 0.02; 95% CI: -0.32 to 0.36; I<sup>2</sup> = 14%, p = 0.32).</p><p><strong>Conclusion: </strong>Self-etching primer presents bond strength that is superior to or similar to conventional surface treatment on glass and hybrid ceramics.</p>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142299330","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Saja Adel Bani-Younes, Rami S Al Fodeh, Lina Khasawneh, Abedelmalek Tabnjh
{"title":"Clinical internal and marginal fit of metal-ceramic fixed dental prostheses fabricated with selective laser melting and 3D-printed pattern casting using cobalt-chromium metal alloy.","authors":"Saja Adel Bani-Younes, Rami S Al Fodeh, Lina Khasawneh, Abedelmalek Tabnjh","doi":"10.1111/jopr.13949","DOIUrl":"https://doi.org/10.1111/jopr.13949","url":null,"abstract":"<p><strong>Purpose: </strong>To evaluate the fit of metal-ceramic three-unit fixed dental prostheses (FDPs) fabricated using selective laser melting (SLM) and 3D-printed casting pattern (CP) and to compare the effect of tooth type and ceramic veneering on marginal and internal gaps.</p><p><strong>Materials and methods: </strong>Patients requiring posterior three-unit FDPs were selected. For each subject, two FDPs were fabricated using SLM and CP. Silicon replica was used to measure the internal and marginal fit of frameworks before and after ceramic veneering. For each replica, 36 measurements were performed using a stereomicroscope: 4 marginal and 32 internal (4 deep chamfers, 12 axial, 4 axio-occlusal, and 12 occlusal). Statistical analysis was performed using two-way ANOVA and paired t-test.</p><p><strong>Results: </strong>A total of 44 metal-ceramic FDPs were fabricated in 22 patients. The results showed that the fabrication method had no significant effect on the marginal, deep chamfer, or occlusal gaps. However, the method significantly affected the axial, axio-occlusal, and total internal fit, and the SLM had larger gaps than the CP. For the effect of ceramic veneering, measurements were significantly higher in the CP group at all gaps, except for the premolar axial and molar occlusal gaps. The SLM fit was less affected by ceramic veneering. Only premolar gaps significantly increased at the marginal, deep chamfer, and axial and axio-occlusal positions.</p><p><strong>Conclusion: </strong>Metal-ceramic FDPs fabricated using SLM and CP techniques provided a similar marginal fit. Premolars had smaller discrepancies compared to molars. The ceramic veneering process increased the gap of the prostheses, with SLM being less affected by ceramic veneering.</p>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142299327","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hefei Bai, Hongqiang Ye, Kenan Ma, Sukun Tian, Hu Chen, Yong Wang, Yongsheng Zhou, Yuchun Sun
{"title":"Template-aided and freehand guiding plane preparation for removable partial dentures: A randomized controlled trial.","authors":"Hefei Bai, Hongqiang Ye, Kenan Ma, Sukun Tian, Hu Chen, Yong Wang, Yongsheng Zhou, Yuchun Sun","doi":"10.1111/jopr.13948","DOIUrl":"https://doi.org/10.1111/jopr.13948","url":null,"abstract":"<p><strong>Purpose: </strong>To evaluate the accuracy of guiding plane preparation for removable partial dentures (RPDs) using 3D-printed templates compared to the freehand method.</p><p><strong>Materials and methods: </strong>Twenty partially edentulous patients requiring RPDs were randomly divided into two groups: the template-aided group (n = 10) and the freehand group (n = 10). Fifty-six guiding planes were prepared by a single clinician using two different methods. The angle deviation between the prepared guiding plane and the RPD path of placement was measured for both groups. The 3D deviations between the prepared guiding plane and the designed guiding plane were measured for the template-aided group. Patient satisfaction with the RPD was evaluated 2 weeks post-RPD wearing.</p><p><strong>Results: </strong>The angular deviation observed in the template-aided group (1.77±1.11 degrees) was significantly lower than that (6.29±4.18 degrees) in the freehand group (p < .001). Additionally, the 3D deviation between the prepared guiding plane and the designed guiding plane of the template-aided group was 106.2±40.9 µm. No significant difference in patient satisfaction scores related to RPD wearing was found between the two groups.</p><p><strong>Conclusions: </strong>Utilizing the cobalt-chromium (CoCr) alloy template significantly improved the accuracy of guiding plane preparation in the clinic, irrespective of the site of the abutment tooth.</p>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142299358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Anne Karoline de Holanda Cavalcanti Pereira, Rayanna Thayse Florêncio Costa, Rafaella de Souza Leão, Bruno Gustavo da Silva Casado, Andre Ulisses Dantas Batista, Sandra Lúcia Dantas Moraes
{"title":"Effectiveness of different surface treatments on bond strength between 3D-printed teeth and denture base.","authors":"Anne Karoline de Holanda Cavalcanti Pereira, Rayanna Thayse Florêncio Costa, Rafaella de Souza Leão, Bruno Gustavo da Silva Casado, Andre Ulisses Dantas Batista, Sandra Lúcia Dantas Moraes","doi":"10.1111/jopr.13941","DOIUrl":"https://doi.org/10.1111/jopr.13941","url":null,"abstract":"<p><strong>Purpose: </strong>To investigate the effects of different surface treatments and thermal cycling on the shear bond strength between 3D-printed teeth and denture bases.</p><p><strong>Material and methods: </strong>For the shear bond strength (SBS) test, the specimens were the maxillary central incisors (11 × 9 × 7 mm) bonded on a cylindrical base (20 × 25 mm). The control group was heat-cured polymethylmethacrylate (PMMA) (N = 20). The printed group was divided into five subgroups (N = 20): no treatment, sandblasting with aluminum oxide (Al<sub>2</sub>O<sub>3</sub>), methyl methacrylate monomer, acetone, and adhesive with urethane dimethacrylate. Half of the samples were subjected to 2000 thermal cycling cycles, and all samples were subjected to the SBS test. The failure mode was established as adhesive, cohesive, or mixed through stereomicroscopic analysis. The surface roughness test (Sa) was performed using optical profilometry, and the rectangular specimens (14 × 14 × 2.5 mm) were divided into four groups according to the surface treatments (N = 7 per group). Paired T and Wilcoxon tests were conducted to perform comparisons within the same group. The Kruskal-Wallis and Dwass-Steel-Critchlow-Fligner post-hoc tests were conducted to compare the groups.</p><p><strong>Results: </strong>Al<sub>2</sub>O<sub>3</sub> sandblasting in the 3D-printed groups achieved high SBS values comparable to those of the control group in the thermal cycled (p = 0.962) and non-thermal cycled samples (p = 0.319). It was the only treatment capable of modifying the surface of the 3D-printed resin, thereby increasing the roughness (p = 0.016).</p><p><strong>Conclusions: </strong>Sandblasting is recommended to increase the bond strength between the tooth and denture bases.</p>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142299356","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}