The International journal of prosthodontics最新文献

{"title":"Accuracy And Precision Evaluation of Facial Scanning with Smartphones Compared to Three-Dimensional Facial Digitization Technology: A Systematic Review and Meta-Analysis.","authors":"Carolina Pirugini Noronha, Tatiane Souza Dias, Vinicios Silva Moreira Santos, Fernanda Clares Alves de Souza, Newton Sesma, Emily Vivianne Freitas da Silva, Márcio Katsuyoshi Mukai","doi":"10.11607/ijp.9647","DOIUrl":"10.11607/ijp.9647","url":null,"abstract":"<p><p>This study aimed to evaluate the accuracy and precision of facial scanning using smartphones compared to traditional 3D facial digitization technology through a systematic review and meta-analysis. Following the Cochrane protocol, a comprehensive literature search was conducted in PubMed, Scopus, and Embase until March 2024 using keywords derived from the PICO question with no time or language restrictions. Non-randomized controlled trials (in vivo or in vitro) that compared facial scanning with smartphones to professional facial scanners using facial markers were included. Studies were assessed to compare the accuracy of facial scanning using mobile devices versus professional scanners, based on the ChR-ChL linear measurement. Data were analyzed using a fixed-effects meta-analysis in RevMan (Review Manager Cochrane). The risk of bias was assessed with the Quality Assessment of Diagnostic Accuracy Studies-2 (QUADAS-2) tool. The search yielded 2,355 studies, with five meeting the eligibility criteria. Of these, three provided sufficient data for the quantitative meta-analysis. The analysis showed no significant mean difference in the ChR-ChL measurement between mobile devices and professional scanners (MD: 0.51, 95% CI: -0.92 to 1.95, p = 0.49). There was moderate heterogeneity (I² = 49%) among the studies. Within the limitations of this systematic review, smartphone-based facial scanning demonstrates a clinically applicable performance for tasks that do not require micrometric precision.</p>","PeriodicalId":94232,"journal":{"name":"The International journal of prosthodontics","volume":"0 0","pages":"1-21"},"PeriodicalIF":1.8,"publicationDate":"2026-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147489182","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Intraoral, Extraoral, and Navigation Photogrammetry Trueness for Complete-Arch Digital Implant Impression: A Comparative Study.","authors":"Alessandro Pozzi, Andrea Laureti, Tiago Marques, Vincent Fehmer, Irena Sailer, Luis Azevedo","doi":"10.11607/ijp.9781","DOIUrl":"https://doi.org/10.11607/ijp.9781","url":null,"abstract":"<p><strong>Purpose: </strong>To compare, in vitro, the trueness of three photogrammetry-based systems-intraoral (IPG), extraoral (EPG), and navigation photogrammetry (NPG)-for complete-arch digital implant impressions.</p><p><strong>Materials and methods: </strong>An actual edentulous maxillary dental cast with four multi-unit abutment analogs was digitized with a desktop scanner to obtain reference dataset. The cast was scanned using IPG, EPG, and NPG (10 scans each). Test and reference standard tessellation language (STL) files were superimposed using a best-fit algorithm. Linear (ΔX, ΔY, ΔZ), angular (ΔANGLE), three-dimensional deviations (ΔEUC, global ΔRMS) were calculated. Data normality was assessed with Shapiro-Wilk test. Median regression models evaluated effects of photogrammetry system, implant position (anterior/posterior), and their interaction. Effective scanning time was recorded.</p><p><strong>Results: </strong>Minimal differences were observed among systems (ΔRMS: EPG 18.10 µm, IPG 20 µm, NPG 20.70 µm; ΔEUC: IPG 34.35 µm, EPG 44.05 µm, NPG 46.80 µm; ΔAngle: IPG 0.43°, EPG 0.45°, NPG 0.46°). Scanning time was similar for EPG and NPG (8, 8.5 s), while with IPG was significantly longer (46.5 s). Median regression showed significant effects of photogrammetry system and implant position on ΔX and ΔY (P <0.01), with significant interaction terms for ΔY and ΔZ (P <0.001).</p><p><strong>Conclusion: </strong>Intraoral, extraoral, and navigation photogrammetry demonstrated high accuracy suitable for complete-arch digital impressions. Differences among systems were small, and their clinical implications require further validation under clinical conditions. The IPG system showed slightly lower global linear deviations, whereas EPG and NPG provided significantly shorter implant-registration times. Both photogrammetry system and implant position significantly influenced linear deviation patterns, particularly along the horizontal axes, demonstrating system-dependent behavior between anterior and posterior sites.</p>","PeriodicalId":94232,"journal":{"name":"The International journal of prosthodontics","volume":"0 0","pages":"1-24"},"PeriodicalIF":1.8,"publicationDate":"2026-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147461459","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Functional Improvement of Occlusion for a Patient with Acquired Open Bite Using a Fully Digital Workflow of Computer-Guided Occlusal Adjustment.","authors":"Yaojun Zhang, Fanyu Yan, Xutong Song, Xiaoxiang Xu, Ye Cao","doi":"10.11607/ijp.9550","DOIUrl":"https://doi.org/10.11607/ijp.9550","url":null,"abstract":"<p><p>Traditional occlusal adjustment workflow involves complex articulator-based simulation and intraoral adjustments, requiring significant time and effort, and the final outcome is less predictable. This case report described a fully digital workflow for computer guided occlusal adjustment. Digital models of the maxillary and mandibular dentitions were acquired. Personalized jaw motion was recorded for virtual articulator mounting. Simulated occlusal adjustments were performed on the virtual articulator via deleting the occlusal contact area and lower the virtual incisal guide pin, until the desired occlusal relationship aligned with treatment goals was achieved. The locations and amounts of tooth tissue requiring occlusal adjustment were visualized. The range-indicating guide and depth-indicating guide were designed and 3D printed with light-polymerizing resin. Initial occlusal adjustment was conducted in the mouth using a dental bur with a stop ring with the aid of these guides. Then additional fine adjustments were performed until the treatment goals were met. This fully digital computer-guided workflow significantly optimizes preoperative analysis, reduces chairside time and labor intensity, and increases the predictability of achieving functional outcomes.</p>","PeriodicalId":94232,"journal":{"name":"The International journal of prosthodontics","volume":"0 0","pages":"1-16"},"PeriodicalIF":1.8,"publicationDate":"2026-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147319126","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluating the Passivity of Implant-Supported Monolithic Zirconia Three-Unit Fixed Partial Denture Screwed to Multi-Unit Abutments with and without a Titanium-Base.","authors":"Ameer Biadsee, Yara Mansour, Jamil Barbara, Shifra Levartovsky","doi":"10.11607/ijp.9574","DOIUrl":"https://doi.org/10.11607/ijp.9574","url":null,"abstract":"<p><strong>Purpose: </strong>This study aimed to evaluate the passive fit of two-unit monolithic zirconia screw-retained fixed partial dentures (FPDs) on multi-unit abutments (MUAs), by comparing restorations fabricated with and without a titanium base (T-base).</p><p><strong>Materials and methods: </strong>To simulate a three-unit fixed partial denture (FPD), two implant analogs were embedded in polymethyl methacrylate (PMMA) and connected to parallel multi-unit abutments (MUAs). Fifty monolithic zirconia restorations were fabricated and divided into two groups: Group 1 consisted of restorations cemented to T-bases, while Group 2 included screw-retained restorations without T-bases. The passive fit of each restoration was evaluated using the Sheffield (one-screw) test and scanning electron microscopy (SEM) by measuring vertical marginal discrepancies (VMD) at six predefined reference points per restoration. Data were statistically analyzed using two-way ANOVA, followed by Tukey's post-hoc test for multiple comparison. The level of significance was set at α = 0.05.</p><p><strong>Results: </strong>There were no statistically significant differences in VMD values between restorations with and without T-bases (P = .395). All recorded VMD values were below 150 µm, a threshold considered clinically acceptable. The lowest mean VMD was observed at the molar lingual site in Group 2 (17.24 ± 17.18 µm).</p><p><strong>Conclusion: </strong>The use of a titanium base did not significantly affect the passive fit of monolithic zirconia FPDs on MUAs. The results highlight the clinical reliability of screw-retained monolithic zirconia restorations, both with or without T-base and provides a foundation for future studies involving more complex restorative designs and conditions.</p>","PeriodicalId":94232,"journal":{"name":"The International journal of prosthodontics","volume":"0 0","pages":"1-20"},"PeriodicalIF":1.8,"publicationDate":"2026-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147319175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Unraveling Psychological Distress in Temporomandibular Disorders: The Interplay of Somatization, Oral Behaviors, and Personality Traits.","authors":"Adrian Ujin Yap, Siew Wui Chan, Abd Aziz Alias, Nur Hafizah Hanem Zubair, Jamaludin Marhazlinda, Kathreena Kadir, Zuraiza Mohamad Zaini","doi":"10.11607/ijp.9663","DOIUrl":"https://doi.org/10.11607/ijp.9663","url":null,"abstract":"<p><strong>Purpose: </strong>This study examined associations between temporomandibular disorders (TMDs), somatization, and their comorbidity with oral behaviors, personality traits, and psychological distress; explored interconnections among these factors; and identified predictors of moderate-to-severe distress in multiethnic Southeast Asian young adults.</p><p><strong>Methods: </strong>A cross-sectional survey among university students collected sociodemographic information and assessments using the Short-form Fonseca Anamnestic Index, Patient Health Questionnaire (PHQ)-15, Oral Behaviors Checklist (OBC), Big-Five Personality Inventory-10, and PHQ-4. Data were analyzed using Chi-square test, non-parametric methods, and logistic regression (α = 0.05).</p><p><strong>Results: </strong>Of 910 participants (mean age: 22.5±4.4 years; 65.9% female), 53.3% reported no TMDs/somatization (NS), 8.5% TMDs only (TO), 27.3% somatization only (SO), and 11.0% comorbidity (CS). Significant group differences were observed in OBC, personality traits (openness, conscientiousness, agreeableness, neuroticism), and PHQ-4 scores, with the highest burden in CS (p range: 0.001-0.006). Moderate correlations (rs = 0.40-0.52) were observed between TMD severity with OBC, somatization with OBC and PHQ-4 domains, and oral behavior with PHQ-4. In multivariate analysis, somatization (OR 3.99), comorbidity (OR 4.76), oral behavior (OR 1.04), and neuroticism (OR 0.81) were predictors of moderate-to-severe distress.</p><p><strong>Conclusion: </strong>Somatization, rather than TMD, was the primary determinant of psychological distress, highlighting the need for integrative, culturally informed care.</p>","PeriodicalId":94232,"journal":{"name":"The International journal of prosthodontics","volume":"0 0","pages":"1-18"},"PeriodicalIF":1.8,"publicationDate":"2026-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147319287","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Monolithic Zirconia Full-Arch Rehabilitation Using a Motion- Integrated Digital Workflow Combining M-4 and All-On-4 Protocols: A Clinical Report.","authors":"Mohamed I Alghraisi, Amr A El-Sawy, Rabia Dakhil, Mohammed A El-Sawy","doi":"10.11607/ijp.9732","DOIUrl":"https://doi.org/10.11607/ijp.9732","url":null,"abstract":"<p><p>A 45-year-old edentulous female presented for full-arch rehabilitation and was managed using a motion-integrated, fully digital workflow that combined the M-4 protocol in the maxilla with the All-on-4 concept in the mandible. Dual-scan CBCT and facial scans enabled prosthetically driven planning, while stackable and mucosa-supported surgical guides facilitated precise implant placement. Real-time jaw-motion data were incorporated into the design process to individualize occlusion, and definitive monolithic zirconia prostheses were fabricated and delivered on titanium multi-unit abutments using Rosen screws. This streamlined digital approach addressed both functional and esthetic challenges, offering a personalized and efficient solution for immediate full-arch rehabilitation.</p>","PeriodicalId":94232,"journal":{"name":"The International journal of prosthodontics","volume":"0 0","pages":"1-23"},"PeriodicalIF":1.8,"publicationDate":"2026-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147319147","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Restoration of Trumpet-Playing Ability using a Maxillofacial Prosthesis and External Pressure Support in a Patient with a Maxillary Defect: A Case Report.","authors":"Shunsuke Sawada, Yuki Nakamura, Hiroki Shikita, Yuki Sakamoto, Yuka Kojima","doi":"10.11607/ijp.9649","DOIUrl":"https://doi.org/10.11607/ijp.9649","url":null,"abstract":"<p><strong>Purpose: </strong>We present what is the first reported case of restoring playing function under high intraoral pressure using external compression applied to a maxillofacial prosthesis in a trumpet player with a maxillary defect, to our best knowledge.</p><p><strong>Materials and methods: </strong>A 51-year-old man with left maxillary sinus sarcoma underwent total maxillectomy with rectus abdominis myocutaneous flap reconstruction. A definitive obturator was fabricated; obturator and palatal contours were refined at chairside under simulated blowing with a trumpet mouthpiece and nasal endoscopic visualization. After adjuvant therapy, including a 70 Gy proton beam, playing trumpet was no longer possible with the final prosthesis alone due to high intraoral pressures during trumpet performance produced air leakage along the obturator-mucosa interface. A customized extraoral headband that applied localized pressure over the leakage pathway was effective and making it possible playing trumpet.</p><p><strong>Results: </strong>Playing ability was poor without the prosthesis, improved with the obturator, and further enhanced when the obturator was combined with the headband. Trumpet embouchure requires precise anterior support and sustained intraoral pressure beyond routine speech goals. Screening under simulated playing identified a leakage path not evident in daily life. Targeted external compression mitigated leakage without compromising comfort, enabling occupation-specific function.</p><p><strong>Conclusion: </strong>When an obturator alone is insufficient under high-pressure tasks, a temporary extraoral pressure support may help restore performance if pressure is carefully titrated and tissues are monitored.</p>","PeriodicalId":94232,"journal":{"name":"The International journal of prosthodontics","volume":"0 0","pages":"1-14"},"PeriodicalIF":1.8,"publicationDate":"2026-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147291835","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Anatomical Variations of Retromolar Pad on Edentulous Restoration.","authors":"Yiwen Zhou, Youwei Tan, Ping Li, Baixiang Cheng, Ruirui Liu","doi":"10.11607/ijp.9664","DOIUrl":"https://doi.org/10.11607/ijp.9664","url":null,"abstract":"<p><strong>Purpose: </strong>This study aimed to quantify the morphology of the retromolar pad (RMP) and its correlation with alveolar ridge resorption, as well as to evaluate its role in edentulous restorations through multidisciplinary research.</p><p><strong>Materials and methods: </strong>This multimethod study comprised three components: (1) a cross-sectional analysis of 200 edentulous mandibular models to quantify retromolar pad (RMP) dimensions-including height, area, and others- to classify RMP shapes (pear, triangular, bar) according to Cawood's classification of ridge resorption; (2) finite element analysis (FEA) simulating occlusal loads on three representative RMP morphologies to evaluate stress distribution and displacement; (3) Clinical trial involving 15 edentulous patients (Cawood classes V-VI), each receiving two dentures-one fabricated using a conventional tray (ATD group) and the other using a modified tray designed for the RMP (MTD group)-to compare patient satisfaction and denture fit, assessed via root mean square (RMS) deviation.</p><p><strong>Results: </strong>Model analysis revealed significant dimensional variations among RMP shapes, with a weak negative correlation between RMP morphology and alveolar ridge resorption (Rs = -0.31, P < .001). FEA identified pear-shaped RMP as exhibiting the lowest stress concentration (305.7 kPa) and minimal displacement (236.3 μm). Clinically, dentures from the MTD group demonstrated significantly better fit, indicated by a lower RMS value, and higher patient satisfaction regarding retention and comfort compared to the ATD group.</p><p><strong>Conclusion: </strong>RMP morphology influence restorative outcomes in edentulous jaws, with pear-shaped RMP providing superior effect. RMP can be utilized to enhance complete denture retention, particularly for patients with severe alveolar ridge resorption.</p>","PeriodicalId":94232,"journal":{"name":"The International journal of prosthodontics","volume":"0 0","pages":"1-22"},"PeriodicalIF":1.8,"publicationDate":"2026-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146260572","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Digital-To-Physical Mounting Strategy without Record Bases using A 3D-Printed Gyroid-Based Mounting Jig.","authors":"Sangmin Ham, Minseo Kim, Irena Sailer, Hyeonjong Lee","doi":"10.11607/ijp.9630","DOIUrl":"https://doi.org/10.11607/ijp.9630","url":null,"abstract":"<p><p>In patients with insufficient posterior occlusal support, transfer of the interocclusal relationship to a mechanical articulator commonly requires record bases to stabilize gypsum casts. This short communication describes a digital-to-physical workflow that combines intraoral scanner-derived interocclusal registration with a patient-specific, 3D-printed gyroid-based mounting jig. Digital mounting was established intraorally and transferred to gypsum casts mounted on an articulator without an additional clinical visit. The workflow was demonstrated in a single clinical case as a proof of concept. This approach may reduce clinical steps and facilitate efficient articulator mounting in selected clinical situations.</p>","PeriodicalId":94232,"journal":{"name":"The International journal of prosthodontics","volume":"0 0","pages":"1-8"},"PeriodicalIF":1.8,"publicationDate":"2026-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146260629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Diagnostic Accuracy of Different Evaluation Approaches for the 5Ts Screener in Temporomandibular Disorder Assessment.","authors":"Ni Luh Dewi, Adrian Ujin Yap, Wita Anggraini, Carolina Marpaung","doi":"10.11607/ijp.9481","DOIUrl":"https://doi.org/10.11607/ijp.9481","url":null,"abstract":"<p><strong>Purpose: </strong>This study aimed to compare the diagnostic performance of different 5Ts evaluation approaches and to establish the most accurate method and cut-off point (CP) in non-clinical populations.</p><p><strong>Materials and methods: </strong>A cross-sectional study was conducted with 278 participants (mean age 22.17 years [SD 1.82]) recruited from a large private university. Participants completed a survey including demographics, the 5Ts with no/yes responses, and 5Ts-F with frequency options. TMD diagnoses were established using the DC/TMD protocol and algorithms. Diagnostic accuracy was analyzed using the area under the receiver operating characteristic (ROC) curves, sensitivity, specificity, and predictive values for four approaches: A1 (5Ts; conventional), A2 (5Ts; CP 1.5), A3 (5Ts-F; CP 1.5), and A4 (5Ts-F; CP 2.5).</p><p><strong>Results: </strong>Among participants, 68.7% received a DC/TMD diagnosis. A1 identified 72.3% as TMD-positive, showing AUCs of 0.94 for all TMDs, PT, and IT. A2 to A4 had AUCs below 0.9. A1's sensitivity/specificity were 100%/88.5%. When items were analyzed separately, A1's AUCs increased to 0.99 for PT and 0.95 for IT.</p><p><strong>Conclusions: </strong>The conventional 5Ts assessment method was the most accurate, and total scores of ≥1 can identify the presence of TMDs in non-clinical samples when points are assigned for no/yes responses.</p>","PeriodicalId":94232,"journal":{"name":"The International journal of prosthodontics","volume":"0 0","pages":"1-14"},"PeriodicalIF":1.8,"publicationDate":"2026-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146260590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}