Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry最新文献

{"title":"Comparative trueness of complete-arch implant position acquisition using auxiliary geometric device-aided and noncalibrated scanbody-based intraoral scanning versus smartphone-based and dedicated extraoral photogrammetry.","authors":"Mohamed Sherif Omar, Yi-Hao Lan, Toshiki Nagai, Chao-Chieh Yang, Wei-Shao Lin","doi":"10.1111/jopr.70244","DOIUrl":"https://doi.org/10.1111/jopr.70244","url":null,"abstract":"<p><strong>Purpose: </strong>To compare the trueness of four techniques for complete-arch implant position acquisition: intraoral implant scanning (IOIS) using auxiliary geometric devices (AGDs), IOIS using horizontally extended noncalibrated scanbodies (NCSBs), smartphone-based extraoral photogrammetry (EPG), and EPG with a dedicated scanner, with the null hypothesis that no significant differences in trueness would be observed among the techniques.</p><p><strong>Materials and methods: </strong>This in vitro study used a mandibular edentulous stone cast with four straight multiunit abutment analogs positioned at sites #19, #22, #27, and #30. Four experimental groups were evaluated: DynamicAbut, using AGD-aided IOIS; TruAbut, using horizontally extended NCSBs; PICApp, using smartphone-based EPG; and MicronMapper, using dedicated EPG. Ten repeated acquisitions were performed per group (n = 10; N = 40). A reference dataset was obtained with a calibrated laboratory scanner. All standard tessellation language (STL) files were imported into computer-aided design software, converted to a uniform multiunit abutment library representation, and analyzed in 3D inspection software after best-fit superimposition to the reference file. Primary outcomes were mean per-implant axis deviation, pooled interimplant distance deviation, and pooled interimplant angulation deviation. Secondary outcomes included pairwise interimplant deviations and short-span versus long-span comparisons. Kruskal-Wallis tests with Dunn post hoc comparisons were used for between-group analyses, and Wilcoxon signed-rank tests were used for within-group span comparisons (α = 0.05).</p><p><strong>Results: </strong>Significant differences were identified among groups for all primary outcomes. DynamicAbut showed the highest mean per-implant axis deviation (0.418 ±0.073), whereas TruAbut showed the lowest deviation (0.122 ±0.018). PICApp (0.204 ±0.044) and MicronMapper (0.239 ±0.030) showed intermediate axis deviations. For pooled interimplant distance deviation, PICApp (22.8 ±7.5 µm) and MicronMapper (22.1 ±2.9 µm) demonstrated significantly lower deviations than DynamicAbut (46.3 ±22.4 µm) and TruAbut (35.3 ±5.9 µm). For pooled interimplant angulation deviation, DynamicAbut showed the greatest deviation (0.343 ±0.175), while TruAbut (0.118 ±0.033) and PICApp (0.133 ±0.012) showed the lowest and statistically comparable deviations; MicronMapper showed intermediate values (0.199 ±0.069). Pairwise analyses showed that no single system was uniformly superior across all implant pairs. Span analysis showed that DynamicAbut had significantly greater long-span angulation deviation than short-span angulation deviation (p = 0.027), whereas PICApp and MicronMapper showed favorable long-span distance deviations.</p><p><strong>Conclusion: </strong>The photogrammetric workflows, including both smartphone-based and dedicated systems, provided the most favorable interimplant distance trueness, particularly ","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":" ","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149031873","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":"Artificial intelligence in radiographic quantification and severity assessment of peri-implant marginal bone loss: A systematic review.","authors":"Hooman Khanzadeh, Sanaz Azizigermi, Aida Mokhlesi, Rasoul Gheisari, Gülce Çakmak, Pedro Molinero-Mourelle, Andrea Roccuzzo, Seyed Ali Mosaddad","doi":"10.1111/jopr.70245","DOIUrl":"https://doi.org/10.1111/jopr.70245","url":null,"abstract":"<p><strong>Purpose: </strong>To critically assess artificial intelligence (AI)-based radiographic models for quantitative measurement, localization/detection, segmentation/keypoints, diagnostic classification, and severity or morphology assessment of peri-implant marginal bone loss (MBL) and peri-implantitis-related bone defects.</p><p><strong>Methods: </strong>PubMed/MEDLINE, Scopus, Web of Science, Embase, the Cochrane Library, Google Scholar, and reference lists were searched from inception through August 11, 2026. Eligible original studies evaluated AI-based radiographic assessment of existing dental implants. Quality Assessment of Diagnostic Accuracy Studies-3 (QUADAS-3) was applied at the prespecified estimate level for diagnostic/image-analysis studies and PROBAST for the prediction-model study.</p><p><strong>Results: </strong>A total of 1485 records were identified, and 17 studies were included. Fourteen reported localization/detection outcomes, six segmentation/keypoint outcomes, 10 severity/morphology outcomes, 12 diagnostic/classification outcomes, and six direct AI-clinician comparisons; categories overlapped. Implant/peri-implant tissue detection reached precision of 0.977, recall of 0.992, F1 score of 0.984, and mean intersection over union (IoU) of 0.916. Implant segmentation achieved a Dice of 0.986 and IoU of 0.974, whereas downstream peri-implantitis classification precision was 0.777. Sensitivity across diagnostic/prediction tasks ranged from approximately 66% to 96%. No study reported the complete prespecified absolute MBL measurement-agreement outcome set. Six studies used explicitly independent multi-rater reference standards with consensus and/or reported reliability, and none underwent clearly traceable independent multicenter external validation.</p><p><strong>Conclusions: </strong>Reported performance is task-specific and is frequently derived from retrospectively selected, enriched, internally split, or augmented datasets. Current models may support research and carefully supervised radiographic image-analysis tasks, but none can be recommended for routine clinical use until independent multicenter external validation and prospective studies demonstrate clinically acceptable absolute measurement error and patient-relevant benefit.</p>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":" ","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149018367","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":"Accuracy of removable partial denture frameworks fabricated by selective laser melting and conventional casting techniques: A systematic review and meta-analysis.","authors":"Sheetal Shingan, Naisargi Shah, Vishrut Bhatnagar, Pratiksha Haveri, Nikhil Bhanushali, Rahul Malu","doi":"10.1111/jopr.70236","DOIUrl":"https://doi.org/10.1111/jopr.70236","url":null,"abstract":"<p><strong>Purpose: </strong>This systematic review aimed to compare the fit accuracy of removable partial denture (RPD) frameworks fabricated by selective laser melting (SLM) and conventional lost-wax (C-LW) casting techniques.</p><p><strong>Methods: </strong>A comprehensive electronic and manual literature search was conducted for studies published between 2015 and 2025 across databases, including PubMed, Cochrane, EBSCOhost, and Google Scholar. Five studies (in vitro and clinical) that directly compared fit accuracy of frameworks fabricated by SLM and C-LW casting technique were included. Risk of bias was assessed using the Cochrane and QUIN tools. Data were synthesized and meta-analyzed, following preferred reporting items for systematic reviews and meta-analyses (2020 guidelines).</p><p><strong>Results: </strong>All studies compared the fit accuracy of RPD frameworks fabricated using SLM versus the C-LW casting technique. Although all assessed overall RPD framework fit, one focused on retentive clasps, another used 3D surface scans, one evaluated fit before and after finishing/polishing, and two examined fit at the rest seat. The meta-analysis indicated that RPD frameworks produced with the C-LW casting technique had significantly greater fit accuracy than those made using SLM. Moderate heterogeneity among studies was observed, largely due to differences in measurement methods and study designs.</p><p><strong>Conclusions: </strong>Conventional casting showed better fit accuracy than SLM in fabricating RPD frameworks, supporting its continued use in prosthodontic practice. However, additional standardized clinical studies are necessary to validate these results and develop clear clinical guidelines.</p>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":" ","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149018424","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":"Zirconia full-arch implant-supported prostheses: An up to 8-year retrospective study with 140 jaws from private practice.","authors":"Panos Papaspyridakos, Avinash S Bidra, Armand Bedrossian, Sindhu Kanikicharla, Abdul Basir Barmak, Panagiotis Ntovas, Lawrence Brecht, Marisa Notturno, Konstantinos Chochlidakis","doi":"10.1111/jopr.70232","DOIUrl":"https://doi.org/10.1111/jopr.70232","url":null,"abstract":"<p><strong>Purpose: </strong>To assess the survival and complication rates of 140 monolithic zirconia implant-supported full-arch fixed complete dental prostheses (IFCDPs) with an up to 8-year follow-up at a private practice setting.</p><p><strong>Materials and methods: </strong>A total of 140 edentulous jaws underwent complete-arch fixed implant treatment with a digital workflow and were rehabilitated with monolithic zirconia IFCDPs. The primary outcome was to assess survival and complication rates, whereas the secondary outcome was to measure the cross-sectional surface area (CSSA) dimensions (prosthetic space) of those 140 monolithic zirconia IFCDPs and to correlate potential technical complications with the prosthetic space dimensions.</p><p><strong>Results: </strong>Out of the 140 zirconia IFCDPs, six fractured, yielding a 95.7% survival rate up to 8-year follow-up. Out of these, three fractures were located in the maxilla and three in the mandible. Non-fractured maxillary IFCDPs had a mean CSSA of 80.5 mm², whereas fractured ones measured 62.5 mm². The connector CSSA of the non-fractured maxillary IFCDPs was 17.9 mm² greater and was statistically significant (p < 0.001). Non-fractured mandibular IFCDPs averaged 79.4 mm², whereas fractured ones measured 54 mm². The connector CSSA of the non-fractured mandibular IFCDPs was 25.4 mm² greater, and the difference was statistically significant (p < 0.001). Non-fractured maxillary IFCDPs had a mean posterior linear height measurement (prosthetic space) of 10.58 mm, whereas fractured ones measured 9 mm. The 1.58 mm difference was statistically significant (p = 0.018). Non-fractured mandibular IFCDPs had a mean posterior prosthetic space of 11.89 mm, compared to 9.55 mm in fractured ones. The 2.34 mm difference was statistically significant (p < 0.001).</p><p><strong>Conclusion: </strong>Monolithic zirconia IFCDPs yielded a 95.7% survival rate after a mean observation period of 3 years (range of 1-8 years). Within the limitations of this study, the maxillary and mandibular connector CSSA should be at least 80 mm², and the linear measurements should be more than 10 mm during CAD design of the final prosthesis to ensure zirconia prosthesis strength against fracture.</p>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":" ","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148983926","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":"Assessing angular and linear misfits in zirconia frameworks through torque/time graph interpretation: A proof of concept.","authors":"Carla Vidal-Ponsoda, Lucas Queiroz Caponi, Emilio Quirós Alcón, Pablo Rodríguez Martínez, Oscar Figueras-Álvarez, Miguel Roig","doi":"10.1111/jopr.70238","DOIUrl":"https://doi.org/10.1111/jopr.70238","url":null,"abstract":"<p><strong>Purpose: </strong>Passive fit in implant-supported complete-arch prostheses is the key to long-term success. The aim of this in vitro, proof-of-concept study was to examine whether torque/time graphs generated from a surgical motor during the prosthetic screw insertion process show consistent patterns of digitally controlled angular and linear misfits in monolithic zirconia frameworks.</p><p><strong>Materials and methods: </strong>Eight high-strength, low-translucency zirconia blocks, suitable for complete-arch prosthetic frameworks, were manufactured and assessed. A standardized edentulous model with three implants was used. The two outer prosthetic screws were screwed and secured, whereas the central screw was tightened using a surgical motor, allowing real-time acquisition of torque/time graphs for each framework. Framework design was intentionally modified to introduce controlled degrees of angular and linear misfit. The resulting torque/time curves were analyzed to identify graphical patterns associated with each specific level of angular and linear misfit.</p><p><strong>Results: </strong>Torque/time graphs were recorded for all zirconia frameworks. The control sample showed a gradual rise in torque to 13.7 N cm with a stable 5 revolutions per minute (rpm), indicating optimal passive fit. Frameworks with small linear (≤80 µm) or angular (≤1.9°) discrepancies displayed similar, clinically acceptable patterns. Linear misfits beyond 120 µm resulted in delayed torque progression and higher resistance, whereas at 160 µm, screw engagement failed, with torque plateau at 2.0 N cm. Angular misfits greater than 2.9° resulted in irregular torque curves and early mechanical tension. Deviations of 3.8° produced unstable torque, reduced rpm, and incomplete screw seating. At 4.8°, no engagement of the screw occurred, with torque values less than 2.0 N cm.</p><p><strong>Conclusions: </strong>Within the limitations of this in vitro, proof-of-concept study, interpreting torque/time graphs obtained during prosthetic screw insertion may represent a promising non-invasive approach to detect misfits in zirconia complete-arch frameworks. This suggests a feasible approach to improve the objectivity of passive fit assessment in clinical practice, although further validation, both in vitro and in vivo, is recommended.</p>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":" ","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148983938","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":"Effect of access-opening closure materials on fluid-related mass gain and volumetric change in three-dimensionally printed closed-hollow obturator specimens.","authors":"Wisarut Prawatvatchara, Soranun Chantarangsu, Raiwint Khunwisetkul, Visaluk Punyawattananon, Cheewin Towithelertkul, Murali Srinivasan, Dusit Nantanapiboon","doi":"10.1111/jopr.70239","DOIUrl":"10.1111/jopr.70239","url":null,"abstract":"<p><strong>Purpose: </strong>To investigate how denture base resin and access-opening closure material affect fluid-related mass gain and micro-computed tomography-derived volumetric changes in three-dimensionally printed closed-hollow obturator specimens.</p><p><strong>Materials and methods: </strong>Specimens were printed from NextDent Denture 3D+ or Apex Base resin. Access-opening specimens had two 3-mm openings sealed with self-cure acrylic, material-matched printed resin (3D), PermaFlo Pink (PF), or CHAIRSIDE composite (ZC) (8 subgroups, n = 10; 80 specimens), plus 2 nonaccess-opening controls. After 24 h of conditioning, specimens underwent thermocycling (5°C-55°C; 2500-10,000 cycles) with gravimetric and micro-computed tomography measurements at baseline and after cycling. Net fluid-related mass gain (dW), relative fluid-related mass gain (rW), net micro-computed tomography-derived volumetric change (dV), and relative micro-computed tomography-derived volumetric change (rV) were analyzed.</p><p><strong>Results: </strong>The thermocycling interval and closure material affected all outcomes, whereas the parent resin affected only dW. Gravimetric change was lowest with ZC and highest with self-cure acrylic; dV was lowest with 3D and highest with PF. Both outcome families were moderately correlated at all intervals (r = 0.39-0.56). dV/rV reached approximately 22%, 53%, and 80% of the 10,000-cycle values after 2500, 5000, and 7500 cycles, respectively. The controls exhibited the highest dW/rW and rV; net dV was highest in the PF access-opening groups.</p><p><strong>Conclusion: </strong>ZC minimized gravimetric change, whereas 3D minimized volumetric change. The preferred closure material depended on the prioritized outcome. Eliminating the access-opening interface did not prevent mass gain or cavity air-volume replacement.</p>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":" ","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148972001","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":"Accuracy and clinical passive fit of reverse and standard scan body protocols for complete-arch implant-supported digital impressions: An in vitro study.","authors":"Rabia Kilicaslan Dasdelen, Ikbal Leblebicioglu Kurtulus, Kerem Kilic","doi":"10.1111/jopr.70241","DOIUrl":"https://doi.org/10.1111/jopr.70241","url":null,"abstract":"<p><strong>Purpose: </strong>The purpose of this in vitro study was to compare the reverse scan body (RSB) and standard scan body (SCB) protocols for complete-arch implant-supported digital impressions with respect to root mean square (RMS), linear deviation, and angular deviation values, as well as clinical passive fit.</p><p><strong>Materials and methods: </strong>Configurations with four and six implants were created on edentulous maxillary and mandibular casts. Digital impressions were obtained with an intraoral scanner using the standard and RSB protocols (10 scans per subgroup; 80 datasets total) and superimposed onto reference datasets acquired with a laboratory scanner. RMS, linear, and angular deviation values were calculated. Clinical passive fit of cobalt-chromium verification jigs fabricated from digital data was evaluated by visual inspection, screw-resistance test, and radiographic assessment.</p><p><strong>Results: </strong>Total RMS values did not differ significantly between the standard and RSB protocols (0.0384 ± 0.0017 vs. 0.0395 ± 0.0012 mm; p = 0.530), although the scan protocol × jaw interaction was significant (p = 0.001). In four-implant casts, the RSB protocol demonstrated significantly lower linear deviation than the SCB protocol (0.0618 vs. 0.0951 mm; p < 0.001); in six-implant casts, no main effect of protocol was found, although several interactions were significant. Angular deviation findings were configuration-dependent. Clinical passive fit was acceptable in 95% of verification jigs fabricated with the RSB protocol and 90% of verification jigs fabricated with the SCB protocol.</p><p><strong>Conclusions: </strong>Within the limitations of this in vitro study, the RSB protocol demonstrated accuracy comparable to the SCB protocol, with more stable implant position transfer in four-implant configurations and a high clinical passive fit rate, supporting its use as a reliable alternative in complete-arch digital implant workflows.</p>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":" ","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148972012","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":"Redefining the role of custom post and core systems: Moving beyond retention to structural reinforcement of severely compromised teeth: An in vitro study.","authors":"Mahmoud Shams, Walid Al-Zordk, Nesma Elgohary, Mohamed Ghazy","doi":"10.1111/jopr.70229","DOIUrl":"https://doi.org/10.1111/jopr.70229","url":null,"abstract":"<p><strong>Purpose: </strong>To evaluate the reinforcing potential of custom post and core restorations of varying materials and designs on the fracture resistance and failure modes of endodontically treated maxillary first premolars.</p><p><strong>Materials and methods: </strong>Fifty-six extracted maxillary first premolars were divided into seven groups (n = 8) based on custom post and core material and design. Three materials were investigated: lithium disilicate in classical (C) and modified (LM) designs, polyetherketoneketone (PEKK) in classical (PC) and modified (PM) designs, and zirconia in classical (ZC) and modified (ZM) designs, alongside a control group restored with zirconia crowns only. All experimental teeth underwent standardized tooth preparation and adhesive cementation and were subsequently restored with zirconia crowns. Following thermomechanical aging (10,000 thermal cycles and 240,000 cyclic loading cycles), fracture resistance was evaluated under compressive loading, failure modes were recorded, and the resulting data were statistically analyzed.</p><p><strong>Results: </strong>A significant interaction was found between material and design. The LM group achieved the highest fracture resistance (2900.25 ± 325.36 N), closely approaching the control group (3213.12 ± 406.74 N) with predominantly favorable failure modes (62.5%-75%). The PEKK groups demonstrated comparably lower fracture resistance values (PC: 1287.63 ± 122.97 N; PM: 1132.75 ± 138.34 N) yet exhibited exclusively favorable failure modes (100%). The ZM group recorded the lowest fracture resistance (879 ± 170.35 N) with the highest prevalence of unfavorable failure modes (87.5%-100%).</p><p><strong>Conclusion: </strong>All tested groups demonstrated clinically acceptable fracture resistance values. Lithium disilicate and PEKK custom post and core restorations each contributed to structural reinforcement in a distinct way-lithium disilicate through superior load-bearing capacity and PEKK through superior biomechanical protective capacity.</p>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":" ","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148957321","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":"Color stability of three-dimensionally printed versus conventional removable dental prosthesis exposed to beverages and disinfectants: A systematic review and meta-analysis of in vitro studies.","authors":"Zhi Hui Janice Tan, Shaun Tan, Kai Yuit Ang, Na Yu, John Rong Hao Tay","doi":"10.1111/jopr.70216","DOIUrl":"https://doi.org/10.1111/jopr.70216","url":null,"abstract":"<p><strong>Purpose: </strong>This systematic review and meta-analysis evaluated the color stability of three-dimensionally (3D)-printed dentures compared with conventional heat-polymerized polymethylmethacrylate (PMMA) resin dentures following exposure to staining beverages and disinfectants.</p><p><strong>Materials and methods: </strong>A comprehensive search of CENTRAL, Embase, MEDLINE, and Scopus was conducted up to March 2025, supplemented by gray literature. In vitro experimental studies were included, and the primary outcome was color change (ΔE). The Risk of Bias tool for Dental Material studies (RoBDEMAT tool) was used to evaluate the risk of bias. Meta-analyses were conducted for each outcome measure (CIELAB or CIEDE2000) and stratified by type and duration of exposure.</p><p><strong>Results: </strong>Nineteen studies were included for quantitative analysis. After accounting for multiple measurements within studies, no statistically significant difference in color change was found between 3D-printed and conventional resins for either exposure or either color system. For colored beverages, the mean difference (3D-printed minus conventional) was 0.44 (95%CI -0.09 to 0.98) for CIELAB and 0.02 (95%CI -1.06 to 1.09) for CIEDE2000; for disinfectants, it was 0.19 (95%CI -1.85 to 2.22) for CIELAB and -0.53 (95%CI -1.10 to 0.04) for CIEDE2000. Unadjusted analyses suggested a small difference in the CIELAB beverage comparison that did not persist after adjustment. Heterogeneity was high across all analyses.</p><p><strong>Conclusion: </strong>3D-printed and conventional PMMA resins showed no statistically significant difference in color stability for any exposure or color system, and any observed differences remained below established clinical perceptibility thresholds. Given the small number of studies, high heterogeneity, and in vitro nature of the evidence, results should be interpreted cautiously.</p>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":" ","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148957243","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":"Effect of post-polymerization exposure times and material thickness on color stability of 3D-printed definitive restoration resins: An in vitro study.","authors":"Yasemin Özden, Safa Özden, Farhad Salmanpour","doi":"10.1111/jopr.70234","DOIUrl":"https://doi.org/10.1111/jopr.70234","url":null,"abstract":"<p><strong>Purpose: </strong>This study aimed to investigate the effect of post-polymerization exposure time and material thickness on the color stability of three-dimensional (3D)-printed definitive restoration resins with varying filler compositions.</p><p><strong>Materials and methods: </strong>Three A1-shaded definitive restoration resins, VarseoSmile Crown Plus (R1), saremco print CROWNTEC (R2), and P-Crown V3 Ceramic (R3), were evaluated. Disk-shaped specimens (8 × 2 mm, 8 × 4 mm) were 3D-printed under controlled conditions. Subsequently, each material thickness group was divided into four subgroups (n = 15) representing post-polymerization exposure times of 0, 2000, 4000, and 6000 flashes using a post-curing device (Otoflash; NK Optik GmbH). Color coordinates were measured using a spectrophotometer, and color differences (ΔE₀₀) were calculated using the CIEDE2000 formula. The Vita 3D Master 1M2 shade was used as the control reference. Data were analyzed using three-way analysis of variance and Tukey's test (α = 0.05).</p><p><strong>Results: </strong>All tested resins exhibited color changes exceeding the clinical acceptability threshold (ΔE₀₀ > 2.25), with color deviations recorded for R1 (ΔE₀₀ = 3.43-6.79), R2 (ΔE₀₀ = 3.54-6.45), and R3 (ΔE₀₀ = 7.30-12.14). Among the post-polymerized specimens, R2 at 4 mm thickness with 6000 flashes post-polymerization achieved the best color fidelity (ΔE₀₀ = 3.54 ± 0.31). Notably, the manufacturer-recommended 4000-flash protocol produced the greatest overall color deviation. Resin type (partial η² = 0.940), post-polymerization exposure time (partial η² = 0.733), and material thickness (partial η² = 0.089) significantly affected color stability (p ≤ 0.001). Overall color fidelity ranked as R2 (mean ΔE₀₀ = 5.07), followed by R1 (mean ΔE₀₀ = 5.60), and R3 (mean ΔE₀₀ = 9.55).</p><p><strong>Conclusions: </strong>Manufacturer shade designations alone are insufficient for predicting the final color of 3D-printed resins. Post-fabrication shade verification is essential, as the final color deviates significantly depending on the material and post-polymerization protocol. The optical properties of additively manufactured definitive restorations may deviate from standard shade references to a clinically unacceptable level depending on material thickness and post-polymerization protocols. Relying exclusively on manufacturers' nominal shade codes or recommended curing protocols could result in esthetic mismatches.</p>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":" ","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148921563","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}