Journal of Prosthetic Dentistry最新文献

{"title":"Effect of cement line on radiographic detection accuracy of abutment-prosthesis misfit.","authors":"Pedro Henrique Hecher Viana, Gabriel Cunha Adiverci, Ingrid Torres de Almeida, Daniela Nascimento Silva, Sergio Lins de-Azevedo-Vaz","doi":"10.1016/j.prosdent.2026.08.006","DOIUrl":"https://doi.org/10.1016/j.prosdent.2026.08.006","url":null,"abstract":"<p><strong>Statement of problem: </strong>Proper prosthetic fit is essential to prevent biofilm accumulation and inflammatory reactions in the peri-implant region. Early detection of misfit at the abutment-prosthesis interface is critical, and periapical radiography has been widely used for this purpose during treatment. However, whether the presence of a cement line influences the accuracy of the radiographic detection of misfit at this interface remains unclear.</p><p><strong>Purpose: </strong>To evaluate the influence of a cement line on the detection of abutment-prosthesis misfit of different magnitudes using the bisecting-angle and paralleling periapical radiographic techniques.</p><p><strong>Material and methods: </strong>A total of 320 periapical radiographs obtained by the bisecting-angle and paralleling techniques were used to analyze 50-, 100-, and 150-µm simulated misfits between the abutment and the prosthetic crown. Three dentists evaluated the images using a 5-point confidence scale (definitely present, probably present, uncertain, probably absent, and definitely absent). Diagnostic accuracy, assessed by the area under the receiver operating characteristic curve (Az), sensitivity, and specificity, were analyzed using Generalized Linear Models (α=.05).</p><p><strong>Results: </strong>Sensitivity was higher in the cemented groups, particularly for 50 µm (0.87 versus 0.48; P<.001), whereas specificity was higher in the noncemented groups across all techniques and misfit magnitudes (P<.001). Az values were significantly influenced by radiographic technique (P=.005), cementation (P=.035), and misfit magnitude (P<.001), with significant interaction effects between cementation and both technique (P<.001) and magnitude (P=.002).</p><p><strong>Conclusions: </strong>The presence of a cement line increases sensitivity but reduces specificity, favoring the detection of misfit at the expense of a higher rate of false-positive findings.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":5.6,"publicationDate":"2026-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148891844","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":"Letter to the Editor regarding, \"Accuracy of 3D scan data of extraorally digitized removable complete dentures with or without metal bases obtained with intraoral scanners\".","authors":"Kai Wang, Lin Wang","doi":"10.1016/j.prosdent.2026.06.043","DOIUrl":"https://doi.org/10.1016/j.prosdent.2026.06.043","url":null,"abstract":"","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":5.6,"publicationDate":"2026-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148886961","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 stability and removal torque of custom CAD-CAM versus stock abutments before and after cyclic loading: A systematic review with meta-analysis and GRADE analysis.","authors":"Ankeet Niwesh, Neha Jain, Arpita Paul, Pankaj Dhawan","doi":"10.1016/j.prosdent.2026.08.004","DOIUrl":"https://doi.org/10.1016/j.prosdent.2026.08.004","url":null,"abstract":"<p><strong>Statement of problem: </strong>Advancements in computer-aided design and computer-aided manufacturing (CAD-CAM) have enabled greater precision and customization in implant abutment fabrication. However, current evidence remains limited regarding the comparative mechanical stability and torque retention of stock versus CAD-CAM-fabricated abutments, particularly under dynamic loading conditions.</p><p><strong>Purpose: </strong>The purpose of this study was to compare the stability and removal torque values of custom CAD-CAM abutments and stock abutments before and after dynamic loading.</p><p><strong>Material and methods: </strong>This systematic review was registered on PROSPERO (CRD42025634444) and conducted according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. A comprehensive electronic search was performed across the PubMed, Scopus, EBSCOhost, and Google Scholar databases for studies published between January 2010 and November 2025. Only English-language in vitro studies evaluating removal torque values for stock versus CAD-CAM abutments were included. Data extraction and meta-analysis were performed using the Review Manager (RevMan; version 5.4; Cochrane Collaboration) software program. Risk of bias was assessed using the Quality Assessment Tool for In Vitro Studies (QUIN), and certainty of evidence was evaluated using the Grading of Recommendations Assessment, Development and Evaluation (GRADE) approach on the GRADEpro platform. A leave-one-out sensitivity analysis was conducted to assess the robustness of the pooled estimates. Standardized mean differences (SMDs) with 95% confidence intervals (CIs) were calculated under a random-effects model. Heterogeneity was assessed using the I² statistic, and statistical significance was defined at α=.05 (P<.05).</p><p><strong>Results: </strong>Among 1222 identified studies, 5 met the inclusion criteria for qualitative synthesis and 4 for meta-analysis, comprising 107 implant-abutment assemblies. Meta-analysis revealed significantly higher removal torque values for stock abutments compared with CAD-CAM abutments both before (SMD=-0.91; 95% CI: -1.56 to -0.26; P=.006) and after (SMD=-1.05; 95% CI: -1.87 to -0.23; P=.01) cyclic loading. Moderate heterogeneity was observed (I²=54%). The overall certainty of evidence was rated as very low.</p><p><strong>Conclusions: </strong>Despite better customization, CAD-CAM abutments demonstrated greater torque reduction compared with stock abutments both before and after dynamic loading, suggesting reduced preload maintenance under functional stresses. Further long-term clinical studies are required to validate these in vitro findings.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":5.6,"publicationDate":"2026-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148880506","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":"Response to the Letter to the Editor regarding \"Prevalence of metal allergy in patients treated with intraoral prostheses and restorations: A systematic review and meta-analysis\".","authors":"Shaista Afroz, Amina Amina, Heba Ansar, Aisha Samreen, Faiz Noor Khan Yusufi, Sajjad Abdur Rahman","doi":"10.1016/j.prosdent.2026.08.005","DOIUrl":"https://doi.org/10.1016/j.prosdent.2026.08.005","url":null,"abstract":"","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":5.6,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148874490","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":"Modified additive manufacturing and injection molding for diastema closure with an integrated occlusal prop.","authors":"Leonardo M Nassani, Gretchen L Smith, Emma Workman, Daniel S Clark, Daria Buhtoiarova, Shereen S Azer, Rafat S Amer","doi":"10.1016/j.prosdent.2026.07.022","DOIUrl":"https://doi.org/10.1016/j.prosdent.2026.07.022","url":null,"abstract":"<p><p>The Additive Manufacturing and Injection Molding (AMIM) technique was modified by digitally integrating custom occlusal props into a translucent 3-dimensionally (3D) printed injection guide. The design improved mandibular stability, patient comfort, and clinical handling during the placement of multiple anterior composite resin restorations without interfering with the restorative procedure. The technique was demonstrated in a patient treated with direct composite veneers.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":5.6,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148874441","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":"Letter to the Editor regarding \"Prevalence of metal allergy in patients treated with intraoral prostheses and restorations: A systematic review and meta-analysis\".","authors":"Ahmad Shoeb Hashmi, N D Gupta, Saif Khan","doi":"10.1016/j.prosdent.2026.06.044","DOIUrl":"https://doi.org/10.1016/j.prosdent.2026.06.044","url":null,"abstract":"","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":5.6,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148874459","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":"Retrospective analysis of CAD-CAM occlusal devices.","authors":"Ayşegül Yıldıran, Helin Su Akyol Kurtça, Bilge Gökçen Röhlig","doi":"10.1016/j.prosdent.2026.08.009","DOIUrl":"https://doi.org/10.1016/j.prosdent.2026.08.009","url":null,"abstract":"<p><strong>Statement of problem: </strong>Limited evidence is available regarding the clinical behavior of the newly developed materials and computer-aided technologies used to fabricate occlusal devices.</p><p><strong>Purpose: </strong>The purpose of this retrospective study was to evaluate the effect of digital manufacturing techniques and materials on the clinical performance of occlusal devices.</p><p><strong>Material and methods: </strong>A total of 49 participants treated with computer-aided design and computer-aided manufacturing (CAD-CAM) occlusal devices were included in this retrospective clinical study. Two different manufacturing technologies, 3-dimensional (3D) printing and milling, and 3 different materials were investigated. Fully and hybrid digital workflows were applied. In the fully digital workflow, intraoral scans were imported into a dental software program, where the occlusal devices were designed and subsequently 3D printed or milled. In the hybrid workflow, maxillary and mandibular stone casts were scanned with an extraoral scanner, after which the devices were digitally designed and produced either additively or subtractively. The participants wore the occlusal devices for 6 months. Dental arch fit, surface wear, and participant satisfaction were evaluated. Descriptive statistical methods were used to evaluate the study data. ANOVA and the t test were used for comparisons. The chi-squared test was used to compare qualitative data (α=.05).</p><p><strong>Results: </strong>Milled occlusal devices demonstrated significantly better fit accuracy compared with the 3D printed ones (0.039 ±0.075 mm versus 0.28 ±0.304 mm; P<.001). Material-based analysis indicated that milled polymethyl methacrylate (PMMA) and polyetheretherketone (PEEK) occlusal devices exhibited lower fit deviations than 3D printed PMMA devices (P<.001). Additively manufactured occlusal devices, regardless of workflow, revealed greater surface wear (P<.001). Occlusal contact counts did not differ significantly between workflows (P>.05). However, a significant material‑based difference was found, with PEEK showing higher contact values than PMMA‑printed devices (P=.010).</p><p><strong>Conclusions: </strong>The results suggested that occlusal devices fabricated using digital techniques showed clinical outcomes and participant satisfaction similar to those produced using hybrid workflows.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":5.6,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148874500","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":"Interimplant distance and angulation measurement from CAD-generated multiunit abutment interfaces: A scan body-independent technique.","authors":"Mohamed Sherif Omar, Toshiki Nagai","doi":"10.1016/j.prosdent.2026.07.026","DOIUrl":"https://doi.org/10.1016/j.prosdent.2026.07.026","url":null,"abstract":"<p><p>Accurate measurement of interimplant distances and angulations is essential for evaluating implant scanning workflows in implant-supported complete arch fixed dental prostheses. Current methods such as root mean square (RMS) surface deviation and geometric primitive fitting do not capture these relationships directly: RMS lacks implant-specific localization, while geometric fitting remains operator- and geometry-dependent. A scan body-independent technique for measuring interimplant distances and angulations directly from computer-aided design-generated multiunit abutment bottom components is described. An open-source program (DIME: Direct Implant Measurement and Evaluation) was used to extract coordinates and axes from corresponding components and reports per-implant deviations and pairwise interimplant relationships. Demonstration included controlled-displacement validation on a synthetic dataset and application across digital recording workflows with different scan body geometries. By measuring the fitting surface used for framework fabrication, the method captures implant spatial data complementary to existing accuracy-evaluation approaches.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":5.6,"publicationDate":"2026-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148840561","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":"Goal-oriented digital orthodontic intrusion system for supra-erupted maxillary molars with temporary anchorage devices: A technique report.","authors":"Xiaoyan Feng, Ao Sun, Luxi Weng, Leilei Xue, Jun Lin, Huiyong Zhu","doi":"10.1016/j.prosdent.2026.06.038","DOIUrl":"https://doi.org/10.1016/j.prosdent.2026.06.038","url":null,"abstract":"<p><p>Permanent molar loss is commonly encountered in clinical practice, and eruption of the opposing teeth caused by their prolonged absence increases the complexity of restorative treatment. How to rapidly and efficiently regain precise restorative space presents a clinical challenge. Orthodontic temporary anchorage devices (TADs) have been regarded as a minimally invasive treatment alternative with absolute anchorage and can simplify orthodontic intrusion. This digital technique aims to simulate the definitive restorative treatment outcome using a digital workflow that guides the design and 3-dimensional (3D) printing of a metal occlusal veneer with implant guides to intrude the target teeth. This intrusion system enables the precise control of the target tooth movement, thereby facilitating subsequent restorative treatment and ensuring a more favorable outcome.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":5.6,"publicationDate":"2026-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148829612","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":"Response to Letter to the Editor regarding, \"Impact of maxillofacial prosthetic rehabilitation on oral health-related quality of life for patients with oral cancer: A prospective case series\".","authors":"Heather J Conrad, Kelli A Trauger, Jacqueline Medina, Qi Wang, Mike T John, Eric L Schiffman","doi":"10.1016/j.prosdent.2026.07.027","DOIUrl":"https://doi.org/10.1016/j.prosdent.2026.07.027","url":null,"abstract":"","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":5.6,"publicationDate":"2026-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148829643","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}