Journal of Prosthetic Dentistry最新文献

{"title":"Accuracy of scannable anatomic healing abutments for implant-supported crown and fixed partial prostheses: An in vitro comparison with conventional scan bodies","authors":"Paolo Nava DDS,&nbsp;Carlo Nava,&nbsp;David Dunbar DDS,&nbsp;Pablo Galindo-Fernandez DDS,&nbsp;Khushboo Kalani BDS,&nbsp;Hamoun Sabri DDS, PgC,&nbsp;Junying Li DDS, MS, PhD","doi":"10.1016/j.prosdent.2026.06.021","DOIUrl":"10.1016/j.prosdent.2026.06.021","url":null,"abstract":"<div><h3>Statement of problem</h3><div>Accurate digital implant scanning is critical for the fit, function, and biological stability of implant-supported restorations. Anatomic scannable healing abutments (AHAs) have been proposed as an alternative to conventional scan bodies (SBs) to simplify digital workflows and facilitate the development of an adequate emergence profile. However, their accuracy in crown and short-span fixed dental prosthesis scenarios remains insufficiently investigated.</div></div><div><h3>Purpose</h3><div>The purpose of this in vitro study was to compare the trueness and precision of implant position detection obtained using AHAs versus SBs in single-crown and short-span fixed dental prosthesis configurations.</div></div><div><h3>Material and methods</h3><div>Two partially edentulous maxillary models were digitally designed and 3-dimensionally (3D) printed: 1 with a single molar edentulous site and 1 with a 3-tooth posterior edentulous span. Implant analogs were placed in the models to simulate a single implant site and a 3-unit implant fixed dental prosthesis site. AHAs (test group) or SBs (control group) were connected to the analogs. A desktop scanner was used to obtain baseline scans for each group, while 15 consecutive intraoral scans per group were acquired using an intraoral scanner. Linear (mesiodistal, buccolingual, coronoapical), angular, and overall 3D deviations at the implant platform center were calculated and analyzed using the <em>t</em> test and Mann–Whitney U test.</div></div><div><h3>Results</h3><div>For the single-crown model, AHAs demonstrated significantly better mean 3D trueness than SBs (20 µm and 74 µm; <em>P</em>&lt;.001), as well as better angular deviation (0.11 degrees and 0.44 degrees; <em>P</em>&lt;.001). Precision was also better for AHAs, with a mean 3D deviation of 10 ±5 µm compared with 67 ±37 µm for SBs (<em>P</em>&lt;.001). In the 3-unit fixed dental prosthesis model, AHAs consistently showed better trueness and precision at both premolar and molar positions. At the molar site, mean 3D trueness was 24 µm for AHAs versus 103 µm for SBs (<em>P</em>&lt;.001), and mean 3D precision was 22 ±9 µm versus 79 ±54 µm (<em>P</em>&lt;.001).</div></div><div><h3>Conclusions</h3><div>AHAs demonstrated significantly higher trueness and precision than SBs for implant position detection in single-crown and short-span fixed dental prosthesis scenarios.</div></div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"136 4","pages":"Pages 1141-1149"},"PeriodicalIF":5.6,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148411867","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of postpolymerization on the wear behavior of additively manufactured definitive crown resins","authors":"Merve Soydan DDS, MS,&nbsp;Taha Yasar Manav DDS, MS","doi":"10.1016/j.prosdent.2026.07.007","DOIUrl":"10.1016/j.prosdent.2026.07.007","url":null,"abstract":"&lt;div&gt;&lt;h3&gt;Statement of problem&lt;/h3&gt;&lt;div&gt;Additively manufactured definitive crown ceramic-reinforced composite (DC-CRC) resin materials have been increasingly used in clinical dentistry. However, their mechanical performance depends on postpolymerization parameters. Limited evidence is available regarding the influence of different postpolymerization techniques on the wear behavior of DC-CRC materials.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;Additively manufactured definitive crown ceramic-reinforced composite (DC-CRC) resin materials have been increasingly used in clinical dentistry. However, their mechanical performance depends on postpolymerization parameters. Limited evidence is available regarding the influence of different postpolymerization techniques on the wear behavior of DC-CRC materials.&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Purpose&lt;/h3&gt;&lt;div&gt;The purpose of this in vitro study was to evaluate the effects of several postpolymerization techniques and durations on the wear volume of additively manufactured DC-CRC specimens after thermomechanical aging and to compare these outcomes with those of a subtractively manufactured hybrid ceramic.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;The purpose of this in vitro study was to evaluate the effects of several postpolymerization techniques and durations on the wear volume of additively manufactured DC-CRC specimens after thermomechanical aging and to compare these outcomes with those of a subtractively manufactured hybrid ceramic.&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Material and methods&lt;/h3&gt;&lt;div&gt;Disk-shaped specimens (Ø12×2 mm) were digitally designed and fabricated either from a hybrid ceramic block (Vita Enamic) by milling (Group VE, &lt;em&gt;n&lt;/em&gt;=10) or from definitive crown resin (Saremco Crowntec) using a digital light processing (DLP) 3-dimensional (3D) printer (&lt;em&gt;n&lt;/em&gt;=50). Printed specimens were assigned to 5 postpolymerization protocols: ultraviolet (UV) light polymerization for 30 minutes (Group Sx1), UV-light polymerization for 2×30 minutes (Group Sx2), otoflash polymerization in a nitrogen atmosphere using 2×2000 flashes (Group Nx1), otoflash polymerization in a nitrogen atmosphere using 4×2000 flashes (Group Nx2), and light-emitting diode (LED) light polymerization for 2×40 seconds (Group LED). All specimens were finished and polished according to the manufacturer’s instructions and subjected to thermomechanical aging in a mastication simulator (50 N, 240 000 cycles, 5 to 55 °C). Pre-aging and post-aging digital scans were obtained with a laboratory scanner. Wear volume (mm³) was calculated by aligning STL files and performing a 3D analysis. Statistical evaluation was performed using 1-way ANOVA, followed by the Tukey post hoc test for multiple comparisons (α=.05).&lt;/div&gt;&lt;/div&gt;&lt;div&gt;Disk-shaped specimens (Ø12×2 mm) were digitally designed and fabricated either from a hybrid ceramic block (Vita Enamic) by milling (Group VE, &lt;em&gt;n&lt;/em&gt;=10) or from definitive crown resin (Saremco Crowntec) using a digital light processing (DLP) 3-dimensional (3D) printer (&lt;em&gt;n&lt;/em&gt;=50). Printed speci","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"136 4","pages":"Pages e125-e132"},"PeriodicalIF":5.6,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148604393","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":"Online removable complete denture postdelivery instructions: Concordance with American College of Prosthodontists denture care guidelines and health literacy benchmarks","authors":"Carson Chou BA,&nbsp;Tara Boroumand BS,&nbsp;Mohammad A. Sabeti DDS, MA,&nbsp;Sun Lim DMD,&nbsp;Ambika Parti DDS, MS","doi":"10.1016/j.prosdent.2026.07.006","DOIUrl":"10.1016/j.prosdent.2026.07.006","url":null,"abstract":"&lt;div&gt;&lt;h3&gt;Statement of problem&lt;/h3&gt;&lt;div&gt;The extent to which patient-directed, web-based removable complete denture postdelivery instructions are concordant with the American College of Prosthodontists (ACP) evidence-based guidelines for the care and maintenance of removable complete dentures and meet health literacy benchmarks is unclear.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;The extent to which patient-directed, web-based removable complete denture postdelivery instructions are concordant with the American College of Prosthodontists (ACP) evidence-based guidelines for the care and maintenance of removable complete dentures and meet health literacy benchmarks is unclear.&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Purpose&lt;/h3&gt;&lt;div&gt;The purpose of this cross-sectional content analysis was to evaluate the concordance of online removable complete denture postdelivery instructions with ACP denture care guidelines and to assess readability, understandability, and actionability.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;The purpose of this cross-sectional content analysis was to evaluate the concordance of online removable complete denture postdelivery instructions with ACP denture care guidelines and to assess readability, understandability, and actionability.&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Material and methods&lt;/h3&gt;&lt;div&gt;A prosthodontist-informed Google search identified U.S. webpages with patient-directed, removable complete denture postdelivery instructions. Two calibrated reviewers scored ACP concordance with a 15-item checklist and assessed understandability and actionability using the Patient Education Materials Assessment Tool for Printable Materials (PEMAT-P); interrater reliability was assessed with intraclass correlation coefficients. Readability was calculated as average grade level (AGL) from 4 indices. Benchmark comparisons used 1-sample &lt;em&gt;t&lt;/em&gt; tests. Practice-type comparisons used Welch 2-sample &lt;em&gt;t&lt;/em&gt; tests for ACP concordance, AGL, and PEMAT-P understandability and a Mann-Whitney &lt;em&gt;U&lt;/em&gt; test for PEMAT-P actionability. Holm-Bonferroni adjustment was applied across 7 primary inferential tests (α=.05).&lt;/div&gt;&lt;/div&gt;&lt;div&gt;A prosthodontist-informed Google search identified U.S. webpages with patient-directed, removable complete denture postdelivery instructions. Two calibrated reviewers scored ACP concordance with a 15-item checklist and assessed understandability and actionability using the Patient Education Materials Assessment Tool for Printable Materials (PEMAT-P); interrater reliability was assessed with intraclass correlation coefficients. Readability was calculated as average grade level (AGL) from 4 indices. Benchmark comparisons used 1-sample &lt;em&gt;t&lt;/em&gt; tests. Practice-type comparisons used Welch 2-sample &lt;em&gt;t&lt;/em&gt; tests for ACP concordance, AGL, and PEMAT-P understandability and a Mann-Whitney &lt;em&gt;U&lt;/em&gt; test for PEMAT-P actionability. Holm-Bonferroni adjustment was applied across 7 primary inferential tests (α=.05).&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Results&lt;/h3&gt;&lt;div&gt;Fifty-four webpages met the inclusion criteria. Mean ACP concordance wa","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"136 4","pages":"Pages 1170-1179"},"PeriodicalIF":5.6,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148620269","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":"Comment on “Readability and performance of AI chatbot responses to frequently asked questions in maxillofacial prosthodontics”","authors":"Rime Chraibi DDS,&nbsp;Hanae Bouzakhnin DDS,&nbsp;Soukaina Abidi DDS,&nbsp;Chaimae Loudili DDS,&nbsp;Yasmine Hanine DDS,&nbsp;Youssra Azzouz DDS,&nbsp;Oumaima Finnaoui DDS,&nbsp;Hicham Soualhi DDS","doi":"10.1016/j.prosdent.2026.06.020","DOIUrl":"10.1016/j.prosdent.2026.06.020","url":null,"abstract":"","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"136 4","pages":"Pages e143-e144"},"PeriodicalIF":5.6,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148456158","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":"Experimental approaches for evaluating the fracture resistance of removable complete dentures: A systematic review of in vitro studies","authors":"Xiaoxia Wang BDenTech, MSc,&nbsp;Andrew B. Cameron BOHDentTech, MDentTech, GCHE, PhD,&nbsp;John M. Aarts MHealSc, PGDipCDentTech, BEd, DipDentTech,&nbsp;Nicholas C.K. Heng BSc(Hons), PhD,&nbsp;Joanne Jung Eun Choi BDentTech (Hons), PGDipCDTech, PhD","doi":"10.1016/j.prosdent.2026.07.025","DOIUrl":"10.1016/j.prosdent.2026.07.025","url":null,"abstract":"&lt;div&gt;&lt;h3&gt;Statement of problem&lt;/h3&gt;&lt;div&gt;Fracture is a common complication with removable complete dentures, yet a standardized, clinically relevant, in vitro method for evaluating fracture resistance is lacking.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;Fracture is a common complication with removable complete dentures, yet a standardized, clinically relevant, in vitro method for evaluating fracture resistance is lacking.&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Purpose&lt;/h3&gt;&lt;div&gt;The purpose of this systematic review was to synthesize in vitro studies evaluating the fracture resistance of removable complete dentures using denture specimens (incorporating base and tooth components) or denture-base specimens (base only), to appraise methodologies, and to identify clinically relevant testing protocols.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;The purpose of this systematic review was to synthesize in vitro studies evaluating the fracture resistance of removable complete dentures using denture specimens (incorporating base and tooth components) or denture-base specimens (base only), to appraise methodologies, and to identify clinically relevant testing protocols.&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Material and methods&lt;/h3&gt;&lt;div&gt;An electronic search was conducted in the Ovid MEDLINE ALL, Embase, Scopus, and Web of Science databases up to January 2026, supplemented by manual searching. In vitro studies evaluating the fracture resistance of dentures or denture bases were included. Study selection, data extraction, and risk of bias assessment were performed independently by 2 reviewers.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;An electronic search was conducted in the Ovid MEDLINE ALL, Embase, Scopus, and Web of Science databases up to January 2026, supplemented by manual searching. In vitro studies evaluating the fracture resistance of dentures or denture bases were included. Study selection, data extraction, and risk of bias assessment were performed independently by 2 reviewers.&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Results&lt;/h3&gt;&lt;div&gt;Thirty-seven studies were included: 31 investigated maxillary specimens, 2 focused on mandibular specimens, and 4 assessed both arches. Eight testing configurations, categorized by loading location, support conditions, and specimen type, were identified. The most prevalent configurations were Type A (denture specimens) and Type E (denture-base specimens), both using midline loading with rigid support (&lt;em&gt;n&lt;/em&gt;=13 each). Type B, involving bilateral posterior loading and the support of simulated mucosa, demonstrated greater clinical relevance. Maximum fracture loads ranged from 126.2 N to 45 575.4 N. Risk of bias assessment classified 8 studies as low risk, 28 as medium risk, and 1 as high risk.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;Thirty-seven studies were included: 31 investigated maxillary specimens, 2 focused on mandibular specimens, and 4 assessed both arches. Eight testing configurations, categorized by loading location, support conditions, and specimen type, were identified. The most prevalent configurations were Type A (denture specimens) and Type E (denture-base specimens), both usi","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"136 4","pages":"Pages 1032-1048"},"PeriodicalIF":5.6,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148794658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of the particle size of monodispersed non-porous silica filler on surface, mechanical properties, and printing trueness of 3D printed dental resin","authors":"Di Chen BDS, MDS,&nbsp;Gan Jin BDS, PhD,&nbsp;Yifan Ma BDS,&nbsp;Zhihao Zhang BDS, MDS,&nbsp;Yunqi Liu BDS,&nbsp;So-Hee Lee BDS, MDS,&nbsp;Jong-Eun Kim DDS, MSD, PhD","doi":"10.1016/j.prosdent.2026.06.025","DOIUrl":"10.1016/j.prosdent.2026.06.025","url":null,"abstract":"<div><h3>Statement of problem</h3><div>The customization of silica fillers represents a prevailing trend in resin improvements, yet clinicians lack clarity regarding particle size effects when selecting materials for 3-dimensional (3D) printing.</div></div><div><h3>Purpose</h3><div>This study aimed to compare the effects of adding monodispersed, nonporous, spherical silica nanoparticles (150 nm) and microparticles (2.0 μm) at 1 to 2 wt% on the mechanical, surface properties, printing trueness, and biocompatibility of 3D printed dental resins, and to characterize the binary mixtures in optimizing filler selection.</div></div><div><h3>Material and methods</h3><div>A 3D printed resin (NextDent C&amp;B resin, 3D systems) was modified with monodispersed silica particles and fabricated into test specimens. Comprehensive analyses included surface characterization (surface roughness, Ra, n=10; scanning electron microscopy, SEM, and energy-dispersive X-ray spectroscopy, EDS, n=3), degree of conversion (DC, n=10), Vickers hardness (VHN, n=10), flexural strength (FS, n=10), 3D trueness (n=10), and relative cell viability. Statistical analysis included normality testing (Shapiro-Wilk test) and analysis of variance (ANOVA) with Tukey post hoc comparisons to assess differences (α=.05). The 2-way ANOVA examined interactive effects of silica particle size and concentration.</div></div><div><h3>Results</h3><div>Microparticles at 2 wt% increased surface roughness to 142 ±12 nm (82 ±11 nm in the control group) and hardness to 15.45 ±0.24 VHN (15.14 ±0.37 VHN in the control group). The inclusion of nanoparticles at 2 wt% exerted the opposite effects, reducing the surface roughness to 46 ±7 nm, improving DC, and reducing FS to 100.46 ±8.69 MPa (138.23 ±8.29 MPa in the control group). The mixed group showed the highest DC (63.11 ±2.13%) and balanced mechanical properties. At 2 wt%, both particle types reduced printing trueness, with root mean square (RMS) error rising above 100 μm (72.62 ±2.10 μm in the control). All formulations exhibited satisfactory short-term and long-term biocompatibility.</div></div><div><h3>Conclusions</h3><div>The monodispersed non-porous silica particles modified 3D printed dental resin. Particle size and concentration of silica critically influence resin performance. Microparticles exhibited stronger concentration-dependent effects than nanoparticles, improving VHN, FS, and Ra. Nanoparticles increased DC and resulted in smoother surfaces with lower Ra. Mixed particles offered a balanced performance through synergistic effects.</div></div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"136 4","pages":"Pages e101-e110"},"PeriodicalIF":5.6,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148421983","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":"Additively manufactured complete arch interim prosthesis directly connected to multiunit abutments: A dental technique","authors":"Yolanda Natali Raico Gallardo DDS, MS, PhD,&nbsp;Steve Kukunas DMD,&nbsp;Cortino Sukotjo DDS, PhD, MMSc, MHPE,&nbsp;Banu Karayazgan DDS, PhD","doi":"10.1016/j.prosdent.2026.07.020","DOIUrl":"10.1016/j.prosdent.2026.07.020","url":null,"abstract":"<div><div>A digital workflow using a digital library for multiunit abutments was used to generate the prosthetic interface, allowing the prosthesis to be directly connected to multiunit abutments. This technique was applied to manage a clinical complication involving the fracture of a previously fabricated prosthesis in a patient undergoing complete arch rehabilitation. The interim prosthesis directly connected to multiunit abutments was additively manufactured and delivered with appropriate fit, esthetics, and occlusion during the healing phase.</div></div><div>A digital workflow using a digital library for multiunit abutments was used to generate the prosthetic interface, allowing the prosthesis to be directly connected to multiunit abutments. This technique was applied to manage a clinical complication involving the fracture of a previously fabricated prosthesis in a patient undergoing complete arch rehabilitation. The interim prosthesis directly connected to multiunit abutments was additively manufactured and delivered with appropriate fit, esthetics, and occlusion during the healing phase.</div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"136 4","pages":"Pages 917-922"},"PeriodicalIF":5.6,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148706879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparative evaluation of precision, morphology, and structural stability in AI-based dental crown design software programs","authors":"Jae-Hyun Sim BS,&nbsp;Mi-Jun Noh MS, PhD,&nbsp;Hee-Ryung Kim BS,&nbsp;Ji-Hwan Kim MPH, PhD","doi":"10.1016/j.prosdent.2026.07.012","DOIUrl":"10.1016/j.prosdent.2026.07.012","url":null,"abstract":"&lt;div&gt;&lt;h3&gt;Statement of problem&lt;/h3&gt;&lt;div&gt;The design outcomes of dental crowns generated by artificial intelligence (AI)-based computer-aided design (CAD) systems have not been sufficiently evaluated in comparison with those produced by conventional CAD software programs.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;The design outcomes of dental crowns generated by artificial intelligence (AI)-based computer-aided design (CAD) systems have not been sufficiently evaluated in comparison with those produced by conventional CAD software programs.&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Purpose&lt;/h3&gt;&lt;div&gt;The purpose of this study was to compare the precision, morphology, and structural stability of dental crowns designed using AI-based software programs and a conventional CAD software program.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;The purpose of this study was to compare the precision, morphology, and structural stability of dental crowns designed using AI-based software programs and a conventional CAD software program.&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Material and methods&lt;/h3&gt;&lt;div&gt;A digital cast of the maxillary first molar was created from a typodont. Crowns were designed with 3 CAD software programs: a conventional software program (3Shape Dental Designer; 3Shape A/S) (CC group) and 2 AI-based software programs (3Shape Automate; 3Shape A/S) (AA group) and (Dentbird; Imagoworks Inc) (AD group) using the same prepared tooth standard tessellation language (STL) file. Sample size had been determined using an a priori power analysis with α=.05, 1-β=.80, and 10 specimens per group were fabricated using a 5-axis milling machine (BX5 PLUS; Dental Plus). The designs were evaluated for precision using root mean square (RMS) deviation, and the cusp angle of the functional cusp was analyzed for morphological comparison. Finite element analysis (FEA) was performed to compare the stress distribution among the groups. Statistical significance was assessed using the Kruskal-Wallis test and 1-way analysis of variance (ANOVA) (α=.05).&lt;/div&gt;&lt;/div&gt;&lt;div&gt;A digital cast of the maxillary first molar was created from a typodont. Crowns were designed with 3 CAD software programs: a conventional software program (3Shape Dental Designer; 3Shape A/S) (CC group) and 2 AI-based software programs (3Shape Automate; 3Shape A/S) (AA group) and (Dentbird; Imagoworks Inc) (AD group) using the same prepared tooth standard tessellation language (STL) file. Sample size had been determined using an a priori power analysis with α=.05, 1-β=.80, and 10 specimens per group were fabricated using a 5-axis milling machine (BX5 PLUS; Dental Plus). The designs were evaluated for precision using root mean square (RMS) deviation, and the cusp angle of the functional cusp was analyzed for morphological comparison. Finite element analysis (FEA) was performed to compare the stress distribution among the groups. Statistical significance was assessed using the Kruskal-Wallis test and 1-way analysis of variance (ANOVA) (α=.05).&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Results&lt;/h3&gt;&lt;div&gt;The CC group showed the highest precision, pr","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"136 4","pages":"Pages e37-e46"},"PeriodicalIF":5.6,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148760256","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 adherence to scanning protocol on the accuracy of digital interocclusal records","authors":"Omer Einhorn DMD,&nbsp;Yaniv Skvirsky DMD,&nbsp;Dror Aizenbud DMD,&nbsp;Zvi Gutmacher DMD","doi":"10.1016/j.prosdent.2026.07.001","DOIUrl":"10.1016/j.prosdent.2026.07.001","url":null,"abstract":"&lt;div&gt;&lt;h3&gt;Statement of problem&lt;/h3&gt;&lt;div&gt;The accuracy of virtual interocclusal records is critical in fully digital prosthodontic workflows. Although manufacturers provide recommended scanning protocols, clinicians may deviate from them in daily practice. The impact of such deviations on virtual articulation accuracy across intraoral scanners remains unclear.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;The accuracy of virtual interocclusal records is critical in fully digital prosthodontic workflows. Although manufacturers provide recommended scanning protocols, clinicians may deviate from them in daily practice. The impact of such deviations on virtual articulation accuracy across intraoral scanners remains unclear.&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Purpose&lt;/h3&gt;&lt;div&gt;The purpose of this in vitro study was to evaluate and compare the accuracy of virtual interocclusal records obtained using 4 intraoral scanners under manufacturer-recommended and alternative scanning protocols.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;The purpose of this in vitro study was to evaluate and compare the accuracy of virtual interocclusal records obtained using 4 intraoral scanners under manufacturer-recommended and alternative scanning protocols.&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Material and methods&lt;/h3&gt;&lt;div&gt;A typodont cast was duplicated in Type III dental stone, mounted in maximum intercuspal position (MIP) on a semi-adjustable articulator, and scanned. Four intraoral scanners—TRIOS 3 (TS), Primescan (PS), Smile Scan (SM), and CS3800 (CS)—were used to obtain interocclusal records (&lt;em&gt;n&lt;/em&gt;=10 per scanner per protocol) using manufacturer-recommended protocols and alternative protocols deviating from manufacturer instructions (complete arch or bilateral interocclusal registration scans). The standard tessellation language (STL) files were analyzed in Geomagic Control X, aligned to a reference cast, and trueness and precision were assessed at 3 standardized locations. Mixed-design ANOVA models were applied to RMS bias (trueness), with position (left, center, right) as a within-subject factor and scanner type as a between-subject factor; protocol was included as an additional between-subject factor, with a separate model for CS3800. Post hoc pairwise comparisons were performed using the Tukey adjustment (α=.05).&lt;/div&gt;&lt;/div&gt;&lt;div&gt;A typodont cast was duplicated in Type III dental stone, mounted in maximum intercuspal position (MIP) on a semi-adjustable articulator, and scanned. Four intraoral scanners—TRIOS 3 (TS), Primescan (PS), Smile Scan (SM), and CS3800 (CS)—were used to obtain interocclusal records (&lt;em&gt;n&lt;/em&gt;=10 per scanner per protocol) using manufacturer-recommended protocols and alternative protocols deviating from manufacturer instructions (complete arch or bilateral interocclusal registration scans). The standard tessellation language (STL) files were analyzed in Geomagic Control X, aligned to a reference cast, and trueness and precision were assessed at 3 standardized locations. Mixed-design ANOVA models were applied to RMS bias (trueness), with positi","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"136 4","pages":"Pages e72-e78"},"PeriodicalIF":5.6,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148456197","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":"Which 3D printing parameters impact the mechanical and structural properties of occlusal devices? A systematic review of methods","authors":"Bruna Castro Moreira DDS, MS,&nbsp;Bruna de Souza Guedes DDS,&nbsp;Cristine Miron Stefani DDS, MS, PhD,&nbsp;Rodrigo Antonio de Medeiros DDS, MS, PhD","doi":"10.1016/j.prosdent.2026.07.005","DOIUrl":"10.1016/j.prosdent.2026.07.005","url":null,"abstract":"&lt;div&gt;&lt;h3&gt;Statement of problem&lt;/h3&gt;&lt;div&gt;Variations in 3-dimensional (3D) printing parameters generate uncertainties regarding the mechanical properties and durability of occlusal devices.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;Variations in 3-dimensional (3D) printing parameters generate uncertainties regarding the mechanical properties and durability of occlusal devices.&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Purpose&lt;/h3&gt;&lt;div&gt;This methodological review aimed to identify and analyze the available scientific evidence regarding the influence of printing parameters on the mechanical properties of occlusal devices manufactured using 3D printing.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;This methodological review aimed to identify and analyze the available scientific evidence regarding the influence of printing parameters on the mechanical properties of occlusal devices manufactured using 3D printing.&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Material and methods&lt;/h3&gt;&lt;div&gt;Searches were conducted in the PubMed, Embase, Scopus, Web of Science, and LILACS databases, as well as in nonpeer-reviewed literature through a Google Scholar search, by following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) 2020 checklist. In vitro studies that evaluated the mechanical and structural properties of 3D printed occlusal devices, considering printing variables such as material composition, printer type, layer thickness and orientation, washing and postpolymerization protocols, and influencing variables such as storage and aging conditions were included.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;Searches were conducted in the PubMed, Embase, Scopus, Web of Science, and LILACS databases, as well as in nonpeer-reviewed literature through a Google Scholar search, by following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) 2020 checklist. In vitro studies that evaluated the mechanical and structural properties of 3D printed occlusal devices, considering printing variables such as material composition, printer type, layer thickness and orientation, washing and postpolymerization protocols, and influencing variables such as storage and aging conditions were included.&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Results&lt;/h3&gt;&lt;div&gt;The included studies consistently demonstrated that printing parameters influenced the mechanical and structural properties. Most studies indicated that thinner layers (25 to 50 μm) and printing angles of 45-degree orientation result in better mechanical properties and greater dimensional accuracy. Water immersion and thermocycling negatively influenced the mechanical properties. Light-polymerized resins showed significant mechanical improvements when associated with adequate postpolymerization treatment.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;The included studies consistently demonstrated that printing parameters influenced the mechanical and structural properties. Most studies indicated that thinner layers (25 to 50 μm) and printing angles of 45-degree orientation result in better mechanical properties and greater dimensional accuracy. Water immersion and thermo","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"136 4","pages":"Pages 1064-1070"},"PeriodicalIF":5.6,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148536303","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}