Journal of Prosthetic Dentistry最新文献

{"title":"A fully digital approach to autonomous robot-assisted immediate implant and interim restoration placement in the maxillary anterior esthetic zone: A case series.","authors":"Yuling Yang, Peng Xu, Qiao Zhou, Yaxin Bai, Minxue Yang, Tao Chen","doi":"10.1016/j.prosdent.2025.08.020","DOIUrl":"https://doi.org/10.1016/j.prosdent.2025.08.020","url":null,"abstract":"<p><strong>Statement of problem: </strong>Immediate implant and interim restoration placement in the maxillary anterior esthetic zone presents challenges in achieving optimal implant positioning, esthetics, and peri-implant tissue stability. A more accurate and efficient clinical workflow is needed to address these demands.</p><p><strong>Purpose: </strong>This study aimed to establish a fully digital workflow that combines autonomous robotic-assisted immediate implant placement and prefabricated interim restorations in the maxillary anterior esthetic region and to evaluate its accuracy and short-term clinical outcomes.</p><p><strong>Material and methods: </strong>Patients requiring immediate implant and interim restoration placement in the anterior esthetic zone were enrolled. A digital workflow was applied, including the virtual implant planning and computer-aided design and computer-aided manufacturing (CAD-CAM) fabrication of interim prostheses. During surgery, the robotic computer-assisted implant surgery (r-CAIS) system autonomously performed osteotomies and implant placement under clinical supervision. Prefabricated interim prostheses were delivered immediately after implantation. Implant placement accuracy was assessed using postoperative cone beam computed tomography (CBCT) imaging. Peri-implant soft and hard tissue status was clinically evaluated during definitive restoration delivery.</p><p><strong>Results: </strong>Six patients (with 7 implants) completed the protocol without complications. All interim restorations were seated immediately after surgery without the need for major adjustments. The mean ±standard deviation of coronal, apical, and angular deviations were 0.66 ±0.13 mm, 0.62 ±0.17 mm, and 1.45 ±0.51 degrees, respectively. At the 6-month follow-up, the mean ±standard deviation of marginal bone loss was 0.49 ±0.26 mm. The mean ±standard deviation of the pink esthetic score was 11.14 ±1.95, and the mean ±standard deviation of the visual analog scale score was 9.00 ±0.22, reflecting satisfactory esthetic outcomes and a high level of patient satisfaction.</p><p><strong>Conclusions: </strong>The integration of autonomous r-CAIS with prefabricated CAD-CAM interim restorations demonstrates high accuracy, favorable esthetic outcomes, and excellent patient satisfaction in immediate implant and interim restoration placement. Long-term, controlled studies are necessary to evaluate the stability and clinical advantages of this approach.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":4.8,"publicationDate":"2025-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144992825","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":"The diagnostic performance of AI based on dental radiographs in predicting marginal bone loss around dental implants: A systematic review and meta-analysis.","authors":"Yuanyuan Li, Xinbin Wang, Hongjie Zhu, Weijia Ye","doi":"10.1016/j.prosdent.2025.08.021","DOIUrl":"https://doi.org/10.1016/j.prosdent.2025.08.021","url":null,"abstract":"<p><strong>Statement of problem: </strong>The variable accuracy of conventional radiographic assessment makes reliable detection of marginal bone loss (MBL) around implants challenging. The diagnostic performance of artificial intelligence (AI) for this purpose remains unclear.</p><p><strong>Purpose: </strong>The purpose of this systematic review and meta-analysis was to evaluate the diagnostic performance of AI using dental radiographs for detecting MBL around implants.</p><p><strong>Material and methods: </strong>A systematic search of PubMed, Embase, and Web of Science was conducted up to February 2025, following the Preferred Reporting Items for a Systematic Review and Meta-analysis of diagnostic test accuracy (PRISMA-DTA) guidelines. Studies were included based on the population, intervention, control, outcome, study design (PICOS) framework, focusing on AI analysis of radiographs for detecting implant MBL. The revised Quality Assessment of Diagnostic Accuracy Studies (QUADAS)-2 tool assessed methodological quality. Sensitivity, specificity, and area under the curve (AUC) were pooled using a bivariate random-effects model (α=.05).</p><p><strong>Results: </strong>Of 240 identified records, 9 studies (7284 participants) met inclusion criteria. The pooled sensitivity of AI for detecting MBL was 0.84 (95% CI: 0.72 to 0.91), specificity was 0.91 (95% CI: 0.81 to 0.96), and AUC was 0.94 (95% CI: 0.91 to 0.96). Compared with dentists, whose pooled sensitivity and specificity were 0.78 (95% CI: 0.70 to 0.84) and 0.70 (95% CI: 0.63 to 0.77), respectively, AI showed significantly higher specificity (Z=4.01, P<.001). The Deeks funnel plot indicated no significant publication bias (P=.20).</p><p><strong>Conclusions: </strong>AI based on dental radiographs demonstrated excellent diagnostic performance for detecting implant MBL. The preliminary evidence suggests that AI may offer higher specificity than dentists, but this comparison was based on limited data and requires confirmation in future studies with larger sample sizes and more direct, head-to-head comparisons.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":4.8,"publicationDate":"2025-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144992845","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":"Articulation distortion in Mandarin-speaking individuals with complete arch maxillary implant-supported fixed dental prostheses","authors":"Yun Zhang MBBS ,&nbsp;Jie Liu BA ,&nbsp;Dedong Yu DDS ,&nbsp;Hongwei Ding PhD ,&nbsp;Yiqun Wu PhD","doi":"10.1016/j.prosdent.2023.10.008","DOIUrl":"10.1016/j.prosdent.2023.10.008","url":null,"abstract":"<div><h3>Statement of problem</h3><div>Implant-supported fixed dental prostheses<span><span> (IFPs) have been increasingly used to restore edentulous jaws, yet few studies have utilized </span>acoustic analysis for objective evaluation of postrestoration speech outcomes.</span></div></div><div><h3>Purpose</h3><div>The purpose of this clinical study was to assess speech articulation in edentulous individuals before and after the provision of IFPs by combining the results of subjective evaluations and objective acoustic analysis parameters.</div></div><div><h3>Material and methods</h3><div><span>The study included thirty-four individuals who had an edentulous maxilla and had been provided with an IFP for over 6 months, along with 6 dentate controls. Acoustic analysis was conducted, and mean opinion scores (MOS) were rated from recordings. The participants were interviewed about perceived speech changes. Changes in the parameters were evaluated using the paired </span><em>t</em> test or Wilcoxon signed-rank test (α=.05). A comparison between dentate controls and edentulous individuals (with or without prostheses) was made using an independent <em>t</em> test or Mann-Whitney U test (α=.025).</div></div><div><h3>Results</h3><div>Following restoration, the center of gravity (CoG) changes occurred in 11 of 12 consonants in edentulous individuals (<em>P</em>&lt;.05). Prosthesis use allowed the CoG of all affricates and fricatives to appear larger and closer to control values. Before restoration, the CoG of 9 of 12 consonants in edentulous individuals differed from controls (<em>P</em>&lt;.01); after restoration, this reduced to 3 out of 12 (<em>P</em>&lt;.01). MOS improved in 10 of 12 consonants (<em>P</em>&lt;.01), nearing a score of 4. Despite restoration, the CoG of alveolo-palatals [tɕ^h], [tɕ], and [ɕ] remained different from controls (<em>P</em>&lt;.01). Most participants were satisfied with the improvement, with few reporting discomfort with alveolars [s] and [ts^h].</div></div><div><h3>Conclusions</h3><div>IFPs can enhance speech in edentulous individuals, yet articulation distortions of alveolar and alveolo-palatal consonants persist. The improper palatal shape of IFPs or an abrupt joint between the IFP and atrophic natural bone may contribute to these distortions.</div></div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"134 3","pages":"Pages 704-711"},"PeriodicalIF":4.8,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136397885","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":"Instrumental and visual evaluation of the color adjustment potential of a recently introduced single‑shade composite resin versus multishade composite resins","authors":"Jiakang Zhu DDS, PhD ,&nbsp;Yue Xu DDS, PhD ,&nbsp;Mengxun Li DDS, PhD ,&nbsp;Cui Huang DDS, PhD","doi":"10.1016/j.prosdent.2023.09.037","DOIUrl":"10.1016/j.prosdent.2023.09.037","url":null,"abstract":"<div><h3>Statement of problem</h3><div>Single-shade composite resins simplify the process of shade selection by providing a narrow range of color but the ability to simulate all shades. However, evidence is limited for the color shifting ability of a newly developed single‑shade composite resin.</div></div><div><h3>Purpose</h3><div><span>The purpose of this in vitro study was to evaluate the instrumental color adjustment potential (CAP-I) and visual color adjustment potential (CAP-V) of a recently introduced single-shade composite resin compared with conventional multishade composite resins against different </span>background colors.</div></div><div><h3>Material and methods</h3><div><span><span>Four multishade composite resins (Spectrum TPH3, Beautifil II, Clearfil AP-X, and Gradia Direct) and a single-shade composite resin (Charisma Diamond One) were tested. Four base shades (A1, A2, A3, and A3.5) of the same composite resin (Filtek Z350XT) were selected as different background colors. Dual specimens (an outer base material with an inner hole filled with inner test material) and single specimens of all test and base materials were prepared (n=6 per group). </span>Spectral reflectance<span> values were obtained by using a spectroradiometer. The color difference (ΔE</span></span>₀₀) and relative translucency parameter (RTP) were calculated by using the CIEDE2000 and RTP_CIEDE2000 formula. Visual scoring of color matching was performed by independent observers. The CAP-I and CAP-V values were calculated according to ΔE₀₀ and visual scoring. Analysis of variance (ANOVA) was used for statistical analysis (α=.05).</div></div><div><h3>Results</h3><div>CAP-I and CAP-V were significantly affected by composite resin type, background color, and their interaction (<em>P</em>&lt;.001). Positive CAP-I and CAP-V values were found for the majority of test materials. Charisma Diamond One exhibited the highest CAP-I value under all background colors, the highest CAP-V value under most background colors, and the significantly highest RTP value (<em>P</em>&lt;.001).</div></div><div><h3>Conclusions</h3><div>The color adjustment potential was dependent on the material type and background color. Charisma Diamond One exhibited the highest color adjustment potential and the most pronounced color shifting ability.</div></div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"134 3","pages":"Pages 832-839"},"PeriodicalIF":4.8,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71424538","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":"Influence of different primers and adhesive system combinations on the durability of resin bonding to lithium disilicate","authors":"Christine Yazigi MSc, Dr med dent ,&nbsp;Shila Alawi ,&nbsp;Sebastian Wille Dr Ing ,&nbsp;Matthias Kern Prof. Dr med dent Habil","doi":"10.1016/j.prosdent.2025.03.019","DOIUrl":"10.1016/j.prosdent.2025.03.019","url":null,"abstract":"<div><h3>Statement of problem</h3><div>The long-term performance of universal dental primers and adhesive systems where all the different components are mixed in a single composition has not yet been thoroughly investigated.</div></div><div><h3>Purpose</h3><div>The purpose of this in vitro study was to evaluate the bond strength and the durability of various luting composite resins to lithium disilicate ceramic after the application of the system’s specific primer or after the application of a pure silane primer (Hoffmann’s Silan).</div></div><div><h3>Material and methods</h3><div>A total of 128 lithium disilicate specimens were etched with hydrofluoric acid and randomly divided into 4 main groups according to the assigned adhesive system. Each group was further divided into 2 subgroups: the first was conditioned with the specified system’s primer, while the second was conditioned with a pure silane primer. Plexiglas tubes filled with composite resin (Clearfil FII New Bond) were adhesively bonded to the lithium disilicate specimens using the assigned luting composite resin. Half of the specimens in each subgroup were stored in distilled water at 37 °C for 3 days, while the other half were subjected to artificial aging over 150 days and 37 500 thermal cycles (5 °C to 55 °C). All surviving specimens underwent tensile bond strength (TBS) testing in a universal testing machine. Statistical evaluation was carried out using 3-way ANOVA, followed by separate 2-way and 1-way ANOVAs. The Tukey HSD test was applied as a post hoc test for pairwise comparisons (α=.05).</div></div><div><h3>Results</h3><div>All specimens survived storage and thermal cycling without failure of the adhesive bonds. After 150 days of artificial aging the mean TBS values ranged from 11.0 ±4.1 MPa to 50.7 ±7.4 MPa. The adhesive system had a significant effect on the resulting TBS, whereas the effect of the conditioning method and artificial aging was not statistically significant for all groups.</div></div><div><h3>Conclusions</h3><div>Artificial aging had a negative effect on the bond strength of all groups except 2. After 150 days, the adhesive system significantly influenced the resulting TBS. The use of freshly mixed silane resulted in higher bond strength for all systems after 150 days than the use of the system-specific primer or adhesive monomer, although the increase was not statistically significant for all systems.</div></div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"134 3","pages":"Pages 749-757"},"PeriodicalIF":4.8,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144031904","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":"Dental prosthesis use and mortality: A time-varying exposure analysis with machine learning","authors":"Yusuke Matsuyama DDS, PhD ,&nbsp;Jun Aida DDS, PhD","doi":"10.1016/j.prosdent.2025.05.007","DOIUrl":"10.1016/j.prosdent.2025.05.007","url":null,"abstract":"<div><h3>Statement of problem</h3><div>Tooth loss has been associated with an increased risk of mortality, and dental prosthesis use may mitigate the effect by recovering masticatory function. However, most studies investigated dental prosthesis use only at baseline and did not consider changes during the follow-up.</div></div><div><h3>Purpose</h3><div>The purpose of this prospective cohort study was to examine the association between dental prosthesis use as a time-varying exposure and mortality in older Japanese adults.</div></div><div><h3>Material and methods</h3><div>Data from the Japan Gerontological Evaluation Study were used, targeting independent adults aged ≥65 years. The baseline questionnaire survey was conducted in 2013, and all-cause mortality data of participants up to 2022 were obtained from the local municipality database (n=47 698; median follow-up: 9.2 years). The 2016 and 2019 questionnaire surveys collected time-varying exposure and covariate information. A doubly robust estimator with ensemble machine learning and controlling for covariates was used to estimate survival probability. The analysis was conducted on all participants, those with &lt;20 natural teeth and those with &lt;10 natural teeth.</div></div><div><h3>Results</h3><div>Of the participants, 19.0% died during follow-up and 55.8% used dental prostheses at baseline. Consistent dental prosthesis use was associated with higher survival probability than consistent nonuse (average treatment effect [ATE]=3.7% points; 95% confidence interval [CI]: 0.3, 7.0). Greater associations were revealed for those with fewer natural teeth (for those with &lt;10 natural teeth, ATE=10.0% points; 95% CI: −0.6, 20.6).</div></div><div><h3>Conclusions</h3><div>Consistent dental prosthesis use was associated with increased survival probability in older Japanese adults. This association was greater among participants with fewer natural teeth.</div></div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"134 3","pages":"Pages 730-738"},"PeriodicalIF":4.8,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144248432","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":"Integration of optical coherence tomography and intraoral scanning for enhanced subgingival finish line trueness: A comparative analysis","authors":"KeunBaDa Son PhD ,&nbsp;Weonjoon Lee PhD ,&nbsp;Kyoung Ho Kim BSE ,&nbsp;Hyosang Jeong MS ,&nbsp;Mansik Jeon PhD ,&nbsp;Jeehyun Kim PhD ,&nbsp;Kyu-Bok Lee DDS, PhD","doi":"10.1016/j.prosdent.2025.05.040","DOIUrl":"10.1016/j.prosdent.2025.05.040","url":null,"abstract":"<div><h3>Statement of problem</h3><div>Intraoral scanning of subgingival finish lines without gingival displacement cords may compromise the accuracy of fixed dental prostheses<span>. The integration of optical coherence tomography (OCT) may overcome this limitation, but further research is required.</span></div></div><div><h3>Purpose</h3><div><span>The purpose of this in vitro study was to compare the trueness of scan data obtained from an intraoral OCT system and an IOS for </span>tooth preparations with subgingival finish lines.</div></div><div><h3>Material and methods</h3><div><span>A maxillary left central incisor<span> was extracted and prepared for a zirconia crown. The prepared tooth was embedded in an artificial gingival model composed of silicone, with a refractive index similar to that of </span></span>gingival tissue<span>. The subgingival depth of the finish line was standardized between 0.50 and 0.70 mm. Scanning was performed using 4 methods: a CAD reference model (CRM) obtained using a laboratory scanner without gingiva, an IOS (i700; MEDIT) without gingiva (IOSO group), an IOS with artificial gingiva in place (IOSG group), and a dataset integrating OCT scans of the subgingival finish line with IOSG data (OCT group). Each group consisted of 15 specimens (n=15). The CRM dataset was used as the reference, and the best-fit alignment was performed for the IOSO, IOSG, and OCT datasets. The trueness of the finish line was assessed by measuring deviations at predefined points on virtual planes established relative to the CRM data. Additionally, 3-dimensional (3D) trueness was evaluated by calculating deviations across the entire point cloud of the CRM dataset. Statistical analysis was conducted using the Kruskal–Wallis test (α=.05).</span></div></div><div><h3>Results</h3><div>The IOSO group (median: 12.5 µm; interquartile range [IQR]: 10.5) and the OCT group (median: 17.3 µm; IQR: 16.7) exhibited significantly lower deviations compared with the IOSG group (median: 109.4 µm; IQR: 235.1) (<em>P</em>&lt;.05). For 3D trueness, no significant difference was observed between the IOSO and IOSG groups (<em>P</em>&gt;.05), while the IOSG group exhibited the highest deviation at the finish line (<em>P</em>&lt;.05).</div></div><div><h3>Conclusions</h3><div>The integration of an intraoral OCT system improved the trueness of subgingival finish line scans compared with conventional intraoral scanning with gingival interference.</div></div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"134 3","pages":"Pages 799.e1-799.e9"},"PeriodicalIF":4.8,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144340234","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":"Three-dimensional evaluation of the internal and marginal fit of multiunit implant-supported anterior fixed dental prostheses fabricated using different intraoral scanning protocols: An in vitro study","authors":"Minji Sun DDS, MSD ,&nbsp;Kyung Chul Oh DDS, PhD ,&nbsp;Jaeyoung Kim DDS, DMSc ,&nbsp;Hong Seok Moon DDS, MSD, PhD","doi":"10.1016/j.prosdent.2025.06.001","DOIUrl":"10.1016/j.prosdent.2025.06.001","url":null,"abstract":"<div><h3>Statement of problem</h3><div><span>The rapid advancement of intraoral scanners and the widespread adoption of </span>dental implant<span> scan bodies have streamlined the digital acquisition of implant position data and the subsequent fabrication of implant-supported prostheses. However, research on the fit of multiunit implant-supported fixed dental prostheses (FDPs) fabricated using a cast-free workflow is sparse.</span></div></div><div><h3>Purpose</h3><div>The purpose of this study was to evaluate the internal and marginal fit of 6-unit implant-supported FDPs fabricated from zirconia by using different intraoral scanning protocols and digital data superimposition and analysis techniques.</div></div><div><h3>Material and methods</h3><div><span>A definitive cast with implants placed in the maxillary right canine, right central incisor, and left canine positions was fabricated to simulate the </span>partial edentulism<span> of the 6 maxillary anterior teeth<span>. Implant scan bodies were attached to the implants, and 10 consecutive intraoral scans were made. Custom abutments were designed based on one of the scan datasets, and 6-unit zirconia prostheses (n=10) were fabricated in a single-step cast-free workflow (Group IL). The designed custom abutments were then fabricated and tightened onto the definitive cast, followed by an additional set of 10 intraoral scans to fabricate another set of 6-unit zirconia prostheses (Group AL; n=10). The intraoral scan data were analyzed by using a cube-embedded implant scan body library and custom abutment dataset. Distances between each cube in the intraoral scan data were measured, and their ratios calculated relative to those obtained from tabletop scan data. Additionally, implant angulation was measured, and angular discrepancies between implant pairs were calculated. The fabricated prostheses were fitted onto the definitive cast, and internal and marginal gaps were assessed by using 3-dimensional data superimposition techniques. The data were analyzed by using a 2-way analysis of variance test (α=.05).</span></span></div></div><div><h3>Results</h3><div>The distance ratio in Group IL was significantly closer to the reference value than that in Group AL (<em>P</em>&lt;.001). The angular discrepancy between implant positions was significantly smaller in Group IL than in Group AL (<em>P</em>&lt;.001). The mean internal gap in Group AL was significantly greater than that in Group IL (<em>P</em>=.007). However, no significant difference was observed between the groups when comparing the marginal gaps of the zirconia prostheses (<em>P</em>&gt;.05).</div></div><div><h3>Conclusions</h3><div>Zirconia prostheses fabricated through a single-step, cast-free workflow exhibited significantly smaller internal gaps than those fabricated through a 2-step process. However, the marginal fit of the zirconia prostheses did not significantly differ between the 2 scanning protocols.</div></div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"134 3","pages":"Pages 764.e1-764.e9"},"PeriodicalIF":4.8,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144540665","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":"A critical appraisal of Wang et al: Analysis of the risk of interproximal contact loss between adjacent teeth and implant-supported fixed prostheses: A retrospective cross-sectional study.","authors":"Parth Aphale, Himanshu Shekhar, Shashank Dokania","doi":"10.1016/j.prosdent.2025.07.023","DOIUrl":"https://doi.org/10.1016/j.prosdent.2025.07.023","url":null,"abstract":"","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":4.8,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144958210","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 an artificial intelligence-based program for locating the maxillomandibular relationship of scans acquired by using intraoral scanners","authors":"Marta Revilla-León DDS, MSD, PhD ,&nbsp;Miguel Gómez-Polo DDS, PhD ,&nbsp;Abdul B. Barmak MD, MSc, EdD ,&nbsp;John C. Kois DDS, MSD ,&nbsp;Jorge Alonso Pérez-Barquero DDS, PhD","doi":"10.1016/j.prosdent.2024.01.023","DOIUrl":"10.1016/j.prosdent.2024.01.023","url":null,"abstract":"<div><h3>Statement of problem</h3><div>An artificial-intelligence (AI) based program can be used to articulate scans in maximum intercuspal position (MIP) or correct occlusal collisions of articulated scans at MIP; however, the accuracy of the AI program determining the MIP relationship is unknown.</div></div><div><h3>Purpose</h3><div>The purpose of the present clinical study was to assess the influence of intraoral scanner (IOS) (TRIOS 5 or i700) and program (IOS or AI-based program) on the accuracy of the MIP relationship.</div></div><div><h3>Material and methods</h3><div>Casts of a participant mounted on an articulator were digitized (T710). A maxillary and a mandibular scan of the participant were recorded by using 2 IOSs: TRIOS 5 and i700. The scans were duplicated 15 times. Then, each duplicated pair of scans was articulated in MIP using a bilateral occlusal record. Articulated scans were duplicated and allocated into 2 groups based on the automatic occlusal collisions’ correction completed by using the corresponding IOS program: IOS-corrected and IOS-noncorrected group. Three subgroups were created based on the AI-based program (Bite Finder) method: AI-articulated, AI-IOS-corrected, and AI-IOS-noncorrected (n=15). In the AI-articulated subgroup, the nonarticulated scans were imported and articulated. In the AI-IOS-corrected subgroup, the articulated scans obtained in the IOS-corrected group were imported, and the occlusal collisions were corrected. In the AI-IOS-corrected subgroup, the articulated scans obtained in the IOS-noncorrected subgroup were imported, and the occlusal collisions were corrected. A total of 36 interlandmark measurements were calculated on each articulated scan (Geomagic Wrap). The distances computed on the reference scan were used as a reference to calculate the discrepancies with each experimental scan. Nonparametric 2-way ANOVA and pairwise multiple comparison Dwass-Steel-Critchlow-Fligner tests were used to analyze trueness. The general linear model procedure was used to analyze precision (α=.05).</div></div><div><h3>Results</h3><div>Significant maxillomandibular trueness (<em>P</em>=.003) and precision (<em>P</em>&lt;.001) differences were found among the subgroups. The IOS-corrected and IOS-noncorrected (<em>P</em>&lt;.001) and AI-articulated and IOS-noncorrected subgroups (<em>P</em>=.011) were significantly different from each other. The IOS-corrected and AI-articulated subgroups obtained significantly better maxillomandibular trueness and precision than the IOS-noncorrected subgroups.</div></div><div><h3>Conclusions</h3><div>The IOSs tested obtained similar MIP accuracy; however, the program used to articulate or correct occlusal collusions impacted the accuracy of the MIP relationship.</div></div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"134 3","pages":"Pages 809-817"},"PeriodicalIF":4.8,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140065382","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}