Journal of Prosthetic Dentistry最新文献

{"title":"A digital technique for recording and assessing mouth opening based on intraoral scanning","authors":"LiuQing Fan MDS,&nbsp;Chenyang Xie PhD,&nbsp;Manlin Sun PhD,&nbsp;Meijun Zhan MDS,&nbsp;Haiyang Yu DDS, PhD","doi":"10.1016/j.prosdent.2026.04.035","DOIUrl":"10.1016/j.prosdent.2026.04.035","url":null,"abstract":"<div><div>To avoid intraoperative instrument obstruction, the accurate evaluation of a patient with limited mouth opening is essential as a critical step in preoperative planning for guided implant surgery. This article presents a digital technique based on intraoral scanning for recording and evaluating the mouth opening at implant surgical sites. Dentition data were acquired by using an intraoral scanner, and the maxillomandibular positional relationship at maximal mouth opening was recorded with a combination of polyvinyl siloxane putty impression material and occlusal registration silicone material. After digitization and data alignment, 3-dimensional maxillary and mandibular dentition data at maximal mouth opening were obtained. Virtual instruments with dimensions corresponding to the actual handpiece and drill were established in the software program to simulate instrument positioning. This technique enabled digital reconstruction of the maxillomandibular relationship at maximal mouth opening and allowed instrument-specific evaluation of mouth opening adequacy during implant planning.</div></div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"136 2","pages":"Pages e36-e39"},"PeriodicalIF":5.6,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147982308","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 influence of simulated gastric acid aging on the Martens indentation parameters of subtractive and additive manufactured resins","authors":"Ahmed Altarazi BDS, MSc, PhD,&nbsp;Shaymaa Mudhaffer BDS, MSc, PhD,&nbsp;Hanan Al-Johani BDS, MSD, PG Cert, PhD,&nbsp;Taiseer Sulaiman DDS, PhD, FICD,&nbsp;Abdulaziz Alhotan BSc, MPhil, PhD","doi":"10.1016/j.prosdent.2026.05.022","DOIUrl":"10.1016/j.prosdent.2026.05.022","url":null,"abstract":"<div><h3>Statement of problem</h3><div>Limited data exist regarding the mechanical performance of subtractively (SM) and additively manufactured (AM) resin-based restorative materials subjected to simulated gastric acid challenges.</div></div><div><h3>Purpose</h3><div>The purpose of this study was to evaluate the effects of simulated gastric acid exposure on the Martens hardness (H_M), indentation modulus (E_IT), indentation depth (I_D), and indentation creep (C_IT) of SM and AM resin materials over time.</div></div><div><h3>Material and methods</h3><div>Four materials were tested: SM (Lava Ultimate (LU) and VITA Enamic (VE)) and AM resins (NextDent C&amp;B MFH (ND) and Crowntec (CT)) (<em>n</em>=5). Specimens were aged in artificial saliva or simulated gastric acid (0.113% HCl, pH=1.2) at 37°C. Measurements of Martens parameters were recorded with a universal instrumented indentation testing device at baseline (T₀), after 2.5 years (T₁), and after 10 years (T₂) of artificial aging. Data were assessed with a generalized linear model and Bonferroni-corrected post hoc tests (α=.05).</div></div><div><h3>Results</h3><div>Resin type significantly influenced all Martens parameters (<em>P</em>&lt;.001). H_M, E_IT, and I_D were impacted by aging solvent (<em>P</em>≤.044) and time point (<em>P</em>≤.001). SM resins exhibited higher H_M and E_IT and lower I_D and C_IT compared to AM resins across all conditions. Gastric acid significantly reduced H_M and E_IT, while increasing I_D and C_IT. VE displayed 7.6% hardness reduction after gastric acid-induced challenges, while ND exhibited 38.7% reduction.</div></div><div><h3>Conclusions</h3><div>Simulated gastric acid aging adversely affected the indentation resistance of SM and AM resins, with AM resins showing greater susceptibility to indentation. Material composition and manufacturing technique strongly influenced the degree of surface degradation.</div></div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"136 2","pages":"Pages e383-e390"},"PeriodicalIF":5.6,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148176062","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 a method of optimizing digital dental crown design with antagonist tooth-wear facets: A prospective clinical study","authors":"Xiaohan Chai MS,&nbsp;Jingwen Yang DDS, PhD,&nbsp;Yong Wang MS,&nbsp;Ting Jiang DDS, PhD","doi":"10.1016/j.prosdent.2026.02.012","DOIUrl":"10.1016/j.prosdent.2026.02.012","url":null,"abstract":"<div><h3>Statement of problem</h3><div>Artificial intelligence (AI) has been applied to crown design and can produce acceptable morphology. However, occlusal morphology and contact area distribution generated by AI may differ from natural teeth. Whether they can approach ideal static and dynamic occlusion remains unknown.</div></div><div><h3>Purpose</h3><div>The purpose of this prospective clinical study was to assess whether using a technique based on the wear facets of antagonist teeth improved the performance of occlusal morphology and contact area distribution of AI generated crowns.</div></div><div><h3>Material and methods</h3><div>In the study, 23 participants were enrolled. Four types of crowns for maxillary first molars were analyzed: natural tooth (NA), technician designed crown (TE), AI generated crown (AT), and the Facets Align technique adjusted AT crown (FA). Occlusal morphology was evaluated by cusp inclination and root mean square (RMS). Occlusal contact area distribution was evaluated by area, F1-score, and occlusal contact separation distance. Finite element analysis (FEA) was used to analyze the stress distribution of the crowns. Statistical analysis was performed using the Friedman 2-way rank nonparametric test and Bonferroni post hoc tests (α=.05).</div></div><div><h3>Results</h3><div>The cusp inclination of AT was lower than that of NA (<em>P</em>&lt;.01) on the distobuccal and distopalatal cusps. The occlusal contact area of AT was smaller than that of NA (<em>P</em>&lt;.01). The occlusal contact separation distance of AT was the shortest during protrusive, working side, and nonworking side lateral movements (<em>P</em>&lt;.01). FA did not differ significantly from NA and AT in cusp inclination. FA had smaller RMS (<em>P</em>&lt;.01) and larger occlusal contact area (<em>P</em>&lt;.001) than AT in several regions. FA improved the occlusal contact separation distance of AT during lateral movement on the working side (<em>P</em>&lt;.05), while no significant difference was observed during protrusive and nonworking side lateral movement. The mean F1-score was 0.60 for FA, and the difference was significant between FA and AT (<em>P</em>&lt;.001). As for finite element analysis (FEA), FA tended to exhibit higher stress and deformation values than AT but remained lower than NA.</div></div><div><h3>Conclusions</h3><div>The Facets Align technique optimized AI generated crowns in both static and dynamic occlusion when there were wear facets on the antagonist tooth.</div></div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"136 2","pages":"Pages 438-445"},"PeriodicalIF":5.6,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147433763","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-dimensionally printed denture base resins modified with green-synthesized TiO2 nanoparticles: A multiparametric assessment","authors":"Amr Azab BDS, MSc, PhD,&nbsp;Dina Abozaid BDS, MSc,&nbsp;Mohammed H. Ahmed BDS, MSc, PhD,&nbsp;Pansai A. Mohamed BDS, MSc","doi":"10.1016/j.prosdent.2026.03.045","DOIUrl":"10.1016/j.prosdent.2026.03.045","url":null,"abstract":"&lt;div&gt;&lt;h3&gt;Statement of problem&lt;/h3&gt;&lt;div&gt;Three-dimensionally (3D) printed denture base resins offer advantages in digitally assisted dentistry but still show inferior mechanical performance and color stability compared with conventional and milled resins. Green-synthesized titanium dioxide nanoparticles (TiO₂NPs) may provide improved dispersion and reduced agglomeration compared with chemically synthesized forms, potentially enhancing the performance of printed resins.&lt;/div&gt;&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 effect of incorporating TiO₂NPs, green-synthesized utilizing grape seed extract (GSE-TiO₂NPs), on the biaxial flexural strength (BFS), Weibull reliability, microhardness, surface roughness, and color stability of a 3D printed denture base resin before and after thermocycling.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Material and methods&lt;/h3&gt;&lt;div&gt;GSE-TiO₂NPs were synthesized, transmission electron microscope (TEM)-characterized, silanized, and incorporated into a printable denture base resin at 0.5 wt% and 0.75 wt%. Disk specimens were 3D printed and assigned to control, 0.5 wt% TiO₂, and 0.75% TiO₂ groups. BFS (&lt;em&gt;n&lt;/em&gt;=24/group), Vickers microhardness, surface roughness, and color difference (ΔE00) (&lt;em&gt;n&lt;/em&gt;=12/group) were evaluated before and after 600 thermocycles (between 5 °C and 55 °C). The data were analyzed using a statistical software program (jamovi v2.6.44). BFS was analyzed using robust ANOVA (20% trimmed means, bootstrap CIs) with robust post hoc tests. Microhardness and surface roughness were evaluated using linear mixed-effects models with Bonferroni-adjusted post hoc tests. The Mann-Whitney &lt;em&gt;U&lt;/em&gt; test was used for color change assessment, and the Kruskal-Wallis test, followed by the Dunn post hoc test with Bonferroni correction were used to compare the percentage and ∆E change among groups (α=.05).&lt;/div&gt;&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Results&lt;/h3&gt;&lt;div&gt;TEM showed quasispherical nanoparticles (mean size 11.8 nm). Increasing TiO₂NP concentration produced a significant rise in BFS (&lt;em&gt;P&lt;/em&gt;&lt;.001), with values increasing from 51.73  ±2.56 MPa (control) to 73.58  ±4.73 MPa (0.75%) before aging. After thermocycling, reinforced groups maintained significantly higher BFS, and the control showed the greatest percentage reduction (–16.46%). Weibull analysis demonstrated higher characteristic strength and reliability in the 0.75 wt% group before and after aging. Microhardness increased in a concentration-dependent manner (control: 16.92  ±0.79 VHN; 0.75%: 23.08  ±0.79 VHN; &lt;em&gt;P&lt;/em&gt;&lt;.001), and reinforced groups exhibited less reduction after thermocycling. Surface roughness increased significantly with nanoparticle incorporation but remained well below the clinical threshold (0.2 µm). Color change values remained clinically acceptable across groups (ΔE00&lt;4.1, the clinically acceptable threshold).&lt;/div&gt;&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Conclusions&lt;/h3&gt;&lt;div&gt;Green-synthesized GSE-TiO₂NPs at 0.5% and 0.75% enhanced the BFS, micr","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"136 2","pages":"Pages e406-e415"},"PeriodicalIF":5.6,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147722983","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 grinding and polishing on the surface characteristics of additively manufactured monolithic zirconia: An in vitro study","authors":"Kevin Bibera DDS, MDS,&nbsp;Antheunis Versluis PhD,&nbsp;Angela Gullard DMD, PhD, MDS,&nbsp;Wainscott Hollis DDS, MDS,&nbsp;Jane Moore DMD, PhD","doi":"10.1016/j.prosdent.2026.04.013","DOIUrl":"10.1016/j.prosdent.2026.04.013","url":null,"abstract":"<div><h3>Statement of problem</h3><div>Whether additively manufactured zirconia produced by stereolithography (SLA) or digital light processing (DLP) techniques can be polished effectively to achieve surface smoothness comparable with that of milled zirconia is unclear.</div></div><div><h3>Purpose</h3><div>The purpose of this in vitro study was to compare the surface roughness and topography of 2 additively manufactured zirconia materials fabricated via DLP and SLA with conventionally milled zirconia after a common zirconia finishing and polishing technique.</div></div><div><h3>Material and methods</h3><div>Three types of monolithic zirconia specimens were fabricated (n=10): milled, DLP-processed (Lithoz), and SLA-processed (3D Ceram). Surface roughness (R_a) was measured at 4 stages: as-sintered, ground, ground and polished, and polished. Grinding and polishing were performed using a standard zirconia polishing system. Surface morphology and roughness were characterized, followed by 2-way ANOVA and pairwise comparisons (α=.05).</div></div><div><h3>Results</h3><div>Both additively manufactured groups demonstrated significantly lower as-sintered surface roughness than milled zirconia (<em>P</em>&lt;.05). Grinding increased surface roughness across all groups, with the largest change observed in the SLA group. Grinding followed by polishing and polishing untreated surfaces significantly reduced surface roughness for all specimens except the SLA group, which exhibited minimal difference from its as-sintered state. This was attributed to its horizontally oriented build layers. All polished surfaces achieved R_a values below 0.2 µm, the threshold for plaque accumulation. Scanning electron microscopy confirmed the elimination of grinding grooves and comparable smoothness among groups after polishing.</div></div><div><h3>Conclusions</h3><div>The tested additively manufactured zirconia produced by DLP and SLA achieved smoother as-sintered surfaces than milled zirconia. Polishing effectively reduced surface roughness below the clinical threshold, demonstrating that the additively manufactured zirconia could meet surface quality standards for long-term intraoral performance.</div></div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"136 2","pages":"Pages e352-e359"},"PeriodicalIF":5.6,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147774801","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":"Precision and predictability in tooth rehabilitation using a chairside digital workflow: A 6-year follow-up","authors":"Rodrigo de Castro Albuquerque DDS, MSc, PhD,&nbsp;Rodrigo Keigo Nakagawa DDS, MSc, PhD,&nbsp;Lucas Moreira Maia DDS, MSc, PhD,&nbsp;Rodrigo Richard da Silveira DDS, MSc, PhD,&nbsp;Nelson Renato Franca Alves Silva DDS, MSc, PhD","doi":"10.1016/j.prosdent.2026.03.038","DOIUrl":"10.1016/j.prosdent.2026.03.038","url":null,"abstract":"<div><div>The long-term success of endodontically treated teeth depends on the integrity and adaptation of the post-and-core restoration. Advances in computer-aided design and computer-aided manufacturing (CAD-CAM) technologies have enabled the fabrication of accurate custom posts, optimizing adaptation and biomechanical performance. This clinical report presents the 6-year follow-up of a severely compromised maxillary anterior tooth restored using a fully integrated chairside digital workflow. The protocol involved guided and conservative fiber-post removal, endodontic retreatment, periodontal surgery, and prosthetic rehabilitation with a custom CAD-CAM-fabricated, glass-fiber post-and-core and a leucite-reinforced ceramic crown. This treatment highlighted the potential of advanced digitally assisted dentistry to improve precision, efficiency, and long-term success in complex restorative treatments.</div></div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"136 2","pages":"Pages 335-338"},"PeriodicalIF":5.6,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147973261","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":"Quantitative analysis with a digital registration method of three-dimensional implant placement accuracy by novice operators using freehand surgery: An in vitro study","authors":"Zhengda Wu DDS,&nbsp;Sha Li DDS,&nbsp;Yu Zhang DDS,&nbsp;Xi Jiang DDS,&nbsp;Ping Di DDS,&nbsp;Chun Yi DDS","doi":"10.1016/j.prosdent.2026.04.026","DOIUrl":"10.1016/j.prosdent.2026.04.026","url":null,"abstract":"<div><h3>Statement of problem</h3><div>Freehand implant placement by novices has been reported to be prone to 3-dimensional (3D) positional errors that may compromise clinical outcomes. Quantitative characterization of these errors and effective feedback methods in early implant training remain limited.</div></div><div><h3>Purpose</h3><div>The purpose of this in vitro study was to quantitatively evaluate the positional deviations of implants placed by novice dental students during their first in vitro freehand surgeries using a digital registration method.</div></div><div><h3>Material and methods</h3><div>This study was conducted using mandibular simulation models derived from a standard patient. Optimal implant position was preoperatively planned based on cone beam computed tomography (CBCT) and digital model data. A total of 88 novice dental students, without prior implant experience, placed single implants freehand on 3D printed mandibular models in a Typodont head model following standardized instructions. Implant positions were evaluated using a digital registration method by superimposing planned and actual implant data. Linear deviations at the entry and apical points (mesiodistal, buccolingual, and apex-entry direction), as well as angular deviations were calculated in 3D coordinates. Data were analyzed using 1-sample <em>t</em> tests or Wilcoxon signed-rank tests to assess deviations from planned positions (α=.05), and implant positions were interpreted using predefined clinical safety thresholds.</div></div><div><h3>Results</h3><div>Most implants showed buccal and distal deviations at both the entry and apical points. Mean entry point deviations were 0.98 mm buccally and 0.67 mm distally, while apical deviations averaged 1.52 mm in both directions. Mean depth deviation was 0.35 to 0.39 mm, and the overall angular deviation was 6.93 degrees. All implants remained within mesiodistal safety limits. Buccolingual deviations reduced bone thickness to &lt;1.5 mm in 42 placements and 40 implants exceeded the predefined vertical safety range.</div></div><div><h3>Conclusions</h3><div>Novice operators demonstrated clinically relevant deviations in freehand implant placement, particularly in buccal and distal directions. The use of digital registration enabled accurate assessment and effective feedback of positional errors.</div></div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"136 2","pages":"Pages e195-e204"},"PeriodicalIF":5.6,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147973283","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":"Microcomputed tomography analysis of marginal adaptation and internal fit of zirconia frameworks with direct-to-abutment connections using a deep learning artificial intelligence model","authors":"Fawaz M. Alzoubi BDM, MA, EdD,&nbsp;Aseel Altemimi MChD/BChD, MS, FRCDC, DABP,&nbsp;Liebert Parreiras Nogueira PhD,&nbsp;Burak Yilmaz DDS, PhD","doi":"10.1016/j.prosdent.2026.04.032","DOIUrl":"10.1016/j.prosdent.2026.04.032","url":null,"abstract":"&lt;div&gt;&lt;h3&gt;Statement of problem&lt;/h3&gt;&lt;div&gt;Despite the increased use of direct-to-abutment connections for implant-supported fixed complete dental prostheses (ISFCDPs), limited evidence exists regarding marginal adaptation and internal fit, 2 parameters critical for biomechanical performance.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Purpose&lt;/h3&gt;&lt;div&gt;This study evaluated the marginal adaptation and internal fit of zirconia frameworks with direct-to-abutment connections compared to conventional titanium base (Ti-base) connections. A novel method for internal fit assessment using a deep learning artificial intelligence (AI) model was also introduced, and level of agreement with traditional measurements was assessed. Internal fit was compared across the 3 designs using both traditional and AI-derived measurements.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Material and methods&lt;/h3&gt;&lt;div&gt;Zirconia specimens (n=24) were allocated to 3 groups: frameworks with Ti-base and regular screws (n=8), frameworks fabricated direct-to-abutment with regular screws (n=8), and frameworks fabricated direct-to-abutment with modified screws (n=8). Each specimen underwent microcomputed tomography scanning before and after thermomechanical aging (TMA) to assess internal fit and marginal adaptation. A deep learning-based AI segmentation model was developed using an image processing software program and achieved a final validation loss below 0.01, corresponding to a Dice Similarity Coefficient greater than 0.95. This metric indicates high spatial overlap and robust segmentation of the gap and abutment regions. Volumetric measurements were obtained for 1 straight and 1 angled transmucosal abutment per specimen. Specimens were subjected to 1.2 million loading cycles at 90 N, followed by repeated measurements. Ninety-six sites were evaluated before and after TMA. Two measurements each for straight and angled abutments for the 3 designs were averaged and difference scores were calculated as post-TMA minus pre-TMA values. Nonparametric statistical tests were applied because of heterogeneity of group variances. Post hoc Mann–Whitney &lt;em&gt;U&lt;/em&gt; tests, intraclass correlation and Bland-Altman analyses were conducted (α=.05).&lt;/div&gt;&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Results&lt;/h3&gt;&lt;div&gt;Significant differences in marginal adaptation among the 3 groups were identified before and after TMA. The Ti-base group demonstrated significantly superior marginal adaptation compared to both direct-to-abutment groups at both time points (&lt;em&gt;z&lt;/em&gt;=3.36, &lt;em&gt;P&lt;/em&gt;&lt;.001). Significant differences in internal fit were also observed among the 3 groups before and after TMA. Ti-base group showed significantly improved internal fit relative to both direct-to-abutment groups (standardized Mann–Whitney z values ranged from 3.15 to 3.36, &lt;em&gt;P&lt;/em&gt;&lt;.001). Intraclass correlations revealed a significant level of agreement between standardized measurements obtained using conventional and AI-based methods (&lt;em&gt;P&lt;/em&gt;&lt;.001), and Bland-Altman plots provided support for concurr","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"136 2","pages":"Pages e216-e227"},"PeriodicalIF":5.6,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147973258","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":"Osseodensification versus conventional drilling in dental implantology: An umbrella review of systematic reviews and meta-analyses","authors":"Sidhartha Tomar BDS, MDS,&nbsp;Pragati Rawat BDS, MDS","doi":"10.1016/j.prosdent.2026.05.002","DOIUrl":"10.1016/j.prosdent.2026.05.002","url":null,"abstract":"<div><h3>Statement of problem</h3><div>Osseodensification has been proposed as a bone preserving osteotomy technique to improve implant primary stability compared with conventional drilling; however, evidence from existing systematic reviews remains inconsistent.</div></div><div><h3>Purpose</h3><div>The purpose of this umbrella review was to synthesize and critically appraise systematic reviews comparing osseodensification with conventional drilling.</div></div><div><h3>Material and methods</h3><div>This umbrella review followed a protocol registered in PROSPERO (CRD420251116804). Electronic searches were conducted in PubMed (MEDLINE), Scopus, Web of science, LILACS, and Cochrane Library. Systematic reviews and meta-analyses evaluating implant placement with osseodensification and conventional drilling were included. Methodological quality was assessed using AMSTAR-2, and findings were synthesized descriptively.</div></div><div><h3>Results</h3><div>Nine systematic reviews were included. Most reported higher primary implant stability, measured by insertion torque and implant stability quotient, with osseodensification, particularly in low-density bone. Marginal bone level changes and implant survival were generally comparable between techniques, with survival exceeding 95% in both groups.</div></div><div><h3>Conclusions</h3><div>Osseodensification was associated with higher primary stability with no demonstrable long-term advantages in marginal bone preservation or implant survival. Its clinical use may be most appropriate in low-density bone situations, although higher-quality randomized controlled trials are needed to confirm these findings.</div></div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"136 2","pages":"Pages e129-e135"},"PeriodicalIF":5.6,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148163400","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":"Alignment of artificial intelligence-generated responses with systematic reviews in implant prosthodontics","authors":"João Vicente Calazans Neto DDS, MSc,&nbsp;Juliana Dela Líbera DDS, MS,&nbsp;João Gabriel S. Souza DDS, MSc, PhD,&nbsp;Bruna Egumi Nagay DDS, MSc, PhD,&nbsp;Valentim A.R. Barão DDS, MS, PhD","doi":"10.1016/j.prosdent.2026.05.001","DOIUrl":"10.1016/j.prosdent.2026.05.001","url":null,"abstract":"<div><h3>Statement of problem</h3><div>Large language model (LLM)-based artificial intelligence (AI) platforms have emerged as tools to support clinical decision-making in dentistry, but their alignment with high-level evidence from systematic reviews in implant prosthodontics remains unclear.</div></div><div><h3>Purpose</h3><div>The purpose of this study was to evaluate the degree of alignment between responses generated by ChatGPT and Google Gemini and the conclusions of published systematic reviews in implant prosthodontics.</div></div><div><h3>Material and methods</h3><div>Systematic reviews published between 2023 and 2025 addressing clinical questions in implant prosthodontics were included, with their conclusions used as reference standards and operationalized as expected-answer statements. Methodological quality of the included reviews was assessed using Assessing the Methodological Quality of Systematic Reviews 2 (AMSTAR 2). Standardized population, intervention, comparison, outcome (PICO)-based questions were submitted to ChatGPT and Google Gemini using identical prompts and no prior context. Agreement between AI responses and review conclusions was scored on a 5-point Likert scale by 2 blinded evaluators, with interrater reliability assessed using weighted Cohen kappa. Platform comparisons used the Wilcoxon matched-pairs signed-rank test, and domain analyses used the Kruskal–Wallis test with Dunn post hoc comparisons (α=.05).</div></div><div><h3>Results</h3><div>Seventy-four systematic reviews were included and categorized into 5 prosthodontic domains. Both ChatGPT and Google Gemini showed high agreement across domains, with no significant differences between platforms or domains (<em>P</em>&gt;.05). Interrater agreement was almost perfect (κ=0.88–0.97). Although agreement was similar, ChatGPT more often reported moderate certainty, whereas Google Gemini more frequently expressed high certainty.</div></div><div><h3>Conclusions</h3><div>ChatGPT and Google Gemini showed high agreement with systematic review conclusions in implant prosthodontics. Differences in certainty expression highlighted the need for cautious interpretation and professional oversight.</div></div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"136 2","pages":"Pages 523-531"},"PeriodicalIF":5.6,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148150290","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}