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

{"title":"Effects of complete-arch digital scanning techniques on the passive fit of CAD-CAM verification devices.","authors":"Natalie Asavanant, Chao-Chieh Yang, Hawra AlQallaf, Amirali Zandinejad, Dean Morton, Toshiki Nagai, Wei-Shao Lin","doi":"10.1111/jopr.14084","DOIUrl":"10.1111/jopr.14084","url":null,"abstract":"<p><strong>Purpose: </strong>To evaluate the impact of different complete-arch digital scanning techniques on the passive fit of computer-aided design and computer-aided manufacturing (CAD-CAM) verification devices.</p><p><strong>Materials and methods: </strong>A mandibular master cast with four multiunit abutment implant analogs was used as the basis for fabricating verification devices through three impression techniques. Group 1 employed a conventional open-tray impression technique using polyvinyl siloxane material, Group 2 utilized digital scans of splinted scanbodies reinforced with a light-polymerizing acrylic resin and metal mesh, and Group 3 applied digital scans of reverse scanbodies connected to a passively fitting interim prosthesis. A total of 60 CAD-CAM verification devices were fabricated, including 10 milled and 10 3D-printed devices across the three groups. The misfit of verification devices was assessed using visual inspection, tactile sensation, and a one-screw test, with any disagreements between the two primary examiners resolved by a third evaluator. Agreement between the clinicians was assessed using crosstabs, kappa statistics, and percent agreement separately for the visual and tactile evaluations. The percentage of misfits was calculated for each group and compared between groups using Fisher's exact tests (α = 0.05).</p><p><strong>Results: </strong>Milled verification devices exhibited superior passive fit compared to 3D-printed devices across all groups. The Group 1 conventional open-tray technique with milled devices achieved a misfit percentage of 0%, significantly outperforming other groups. Group 3 reverse scanbodies with milled devices followed with a 20% misfit rate, while Group 2 splinted scanbodies with auxiliary features and milled devices showed the highest misfit rate at 60%. Among 3D-printed devices, Group 1 had the lowest misfit rate at 50%, followed by Group 3 at 60%, and Group 2 at 80%. The agreement between examiners was substantial, with a kappa statistic of 0.77 and 88% consistency. Statistical analysis revealed significant differences in misfit rates, highlighting the advantages of conventional methods and milled devices in achieving superior fit.</p><p><strong>Conclusion: </strong>The conventional splinted open-tray impression technique, combined with milled verification devices, demonstrated superior fit and outperformed other impression and manufacturing techniques. The reverse scanbody protocol performed better than splinted scanbodies with auxiliary features, although it still showed variability. Conversely, 3D-printed verification devices demonstrated higher misfit rates, limiting their clinical applicability for verifying implant positions in complete-arch prostheses.</p>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144334254","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":"Passivity of complete arch implant-supported fixed dental prostheses fabricated using a scan gauge system and conventional scan bodies: An in vitro study.","authors":"Stacey Kerzhner, Huan-Chun Lin, Frank Tuminelli","doi":"10.1111/jopr.14079","DOIUrl":"https://doi.org/10.1111/jopr.14079","url":null,"abstract":"<p><strong>Purpose: </strong>Intraoral scanning of an edentulous full arch with implants is subject to scanning errors. These errors may lead to a misfit of the final implant-supported restoration if a verification procedure is not employed. The purpose of this in vitro study was to compare the passivity of fit of metal frameworks on full arch multi-unit abutments (MUAs) fabricated using different intraoral impressions of full arch dental implants.</p><p><strong>Materials and methods: </strong>Maxillary and mandibular master casts were fabricated with Type IV gypsum with MUAs located 0.5 mm subgingivally. The maxillary cast consisted of two straight MUA anterior analogs and two distally angulated MUA posterior analogs. The mandibular cast consisted of six MUA straight analogs. Digital scans of the maxillary and mandibular master casts were completed by one operator with a Trios 4 intraoral scanner (3Shape). One set of scans was completed with scan gauges and the other with scan bodies. Screw-retained metal bars were fabricated from each of the four scans. In addition, two bars were fabricated with intentional misfit to serve as a negative control. All bars were milled with the same bar design dimensions. Twelve evaluators were asked to evaluate the bars and to provide a yes or no answer to three questions related to bar fit on the casts. A Fisher's Exact test was used to analyze the data.</p><p><strong>Results: </strong>Twelve evaluators completed a clinical assessment of each bar. In the maxilla, a significant number of prosthodontists considered the bar fabricated using the Nexus technology more accurate than the bar fabricated using conventional scan bodies (p < 0.001). Ten out of twelve (83.33%, p < 0.05) of evaluators reported that the maxillary Nexus bar passed the one screw test and had a clinically acceptable fit. Only 8.33% of evaluators felt that the bars fabricated from the conventional scan bodies had a passive fit and were clinically acceptable. In the mandible, a majority (75%, p < 0.05) of evaluators responded that the Nexus bars had a clinically acceptable fit, whereas none of the conventional scan body bars did. Only 16.66% of evaluators determined the conventional scan body bars to have a passive fit, while 58.33% (p = 0.089) determined that the Nexus bars did have a passive fit. All the evaluators deemed the bars fabricated with intentional misfit clinically unacceptable.</p><p><strong>Conclusion: </strong>Over 75% of the evaluators reported that both the maxillary and mandibular bars fabricated utilizing the Nexus scan gauge system achieved a clinically acceptable result. Future studies are needed that expand on more objective findings.</p>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144295190","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":"Evaluation and comparison of occlusal interference markings with articulating papers of varying thicknesses: An in vivo study.","authors":"Disha Oberoi, Chethan Hegde","doi":"10.1111/jopr.14086","DOIUrl":"https://doi.org/10.1111/jopr.14086","url":null,"abstract":"<p><strong>Purpose: </strong>This study aimed to evaluate the effectiveness of different thicknesses of articulating paper (100, 40, and 12 µm) in detecting occlusal interferences. The goal was to identify an optimal thickness range that could reliably mark clinically significant occlusal contacts, ensuring better outcomes in restorative procedures.</p><p><strong>Materials and methods: </strong>An in vivo study was conducted with 13 patients requiring a single-tooth porcelain-fused-to-metal (PFM) crown restoration. Occlusal contacts were assessed using three thicknesses of articulating papers (100, 40, and 12 µm) during maximum intercuspation. Each thickness was applied sequentially, and any occlusal interference, identified by a \"bull's eye\" marking, was recorded. Statistical analysis was performed using chi-square test to assess differences in detection efficacy among the papers.</p><p><strong>Results: </strong>Of the 82 attempts to locate occlusal interferences, the 100 µm and 40 µm papers effectively marked contacts, with the 100 µm paper registering interferences in 58 attempts and the 40 µm paper in 60 attempts. The 12 µm paper, however, failed to mark interferences in 71 attempts. Statistical analysis showed no significant difference between 100 and 40 µm papers in detecting interferences.</p><p><strong>Conclusions: </strong>Both 100 and 40 µm articulating papers effectively detected occlusal interferences, with 100 µm providing larger, more visible marks and 40 µm offering greater precision in localized contact detection. In contrast, 12 µm paper showed limited efficacy under standard occlusal forces, underscoring the need for thicker papers in clinical settings for ease of visualization. Optimizing articulating paper selection can enhance diagnostic accuracy, facilitating more precise occlusal adjustments and improved patient outcomes.</p>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144267769","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":"Issue Information - Editorial Board","authors":"","doi":"10.1111/jopr.13711","DOIUrl":"https://doi.org/10.1111/jopr.13711","url":null,"abstract":"","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":"34 5","pages":"447-448"},"PeriodicalIF":3.4,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jopr.13711","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144244338","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 surface treatments on the bond strength between additively manufactured or injection-molded high-performance polymers and titanium.","authors":"Ahmet Serkan Küçükekenci, Doğu Ömür Dede, Oğuz Süleyman Özdemir, Burak Yilmaz","doi":"10.1111/jopr.14085","DOIUrl":"https://doi.org/10.1111/jopr.14085","url":null,"abstract":"<p><strong>Purpose: </strong>To investigate the effect of surface treatment and fabrication techniques of high-performance polymers on their shear bond strength (SBS) to grade IV titanium.</p><p><strong>Materials and methods: </strong>A total of 120 pre-milled titanium abutments were sectioned. Cylindrical polyetherketoneketone (PEKK) specimens (3 × 2 mm) were fused-filament fabricated (FFF) 3D-printed, and similar-sized polyetheretherketone (PEEK) specimens were either FFF 3D-printed or cut from injection-molded (INJ) rods (n = 40). The specimens were divided into 4 groups according to surface treatments (n = 10): non-thermal air plasma (Ntp), 98% sulfuric acid (SA), sandblasted by 110 µm silicate-coated alumina particles (Roc), and sandblasted by 30 µm silicate-coated alumina particles (Coj). Surface-treated polymer specimens were cemented onto bonding agent-applied titanium specimens. After 24 h of water storage at 37°C, SBS tests were performed; data were analyzed using Kruskal-Wallis and Dunn's multiple comparison tests (α = 0.05). The failure mode was classified using an optical microscope.</p><p><strong>Results: </strong>The high-performance polymer surface was affected by both the fabrication method and the surface treatment. While the SA (18.86 ±1.46 MPa) and Coj (15.83 ±1.26 MPa) surface treatments demonstrated the highest SBS values for the INJ-PEEK polymer, the Roc (14.86-15.76 MPa) and Coj (11.78-15.92 MPa) treatments for FFF 3D-printed polymers (p < 0.05). The failure type was mostly adhesive, but the INJ-PEEK failures were mixed; no cohesive failures were observed. A very weak but significant correlation between SBS and failure type was detected.</p><p><strong>Conclusion: </strong>The optimal surface treatment technique for a high SBS between high-performance polymers and grade IV titanium depends on the polymer fabrication technique. High bond strength was achieved when SA was used on INJ-PEEK and when silicate-coated alumina particle air abrading was applied on printed PEEK and PEKK.</p>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144259236","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":"Microbiota and clinical outcomes of implant-supported full-mandible dentures on patients with a history of periodontitis: A 5-year prospective cohort study.","authors":"Jefferson Antônio Gomes, Yumi Chokyu Del-Rey, Alice Ramos de Freitas, Ivete Aparecida de Mattias Sartori, Cássio do Nascimento","doi":"10.1111/jopr.14081","DOIUrl":"https://doi.org/10.1111/jopr.14081","url":null,"abstract":"<p><strong>Purpose: </strong>To characterize the microbiota of implant-supported full-mandible dentures and its correlation to clinical outcomes for up to 5 years after implant loading in patients with a history of periodontal disease.</p><p><strong>Materials and methods: </strong>Twelve individuals with a history of periodontitis (Stage IV and Grade B) received five immediate implants and a fixed complete-arch mandibular prosthesis. Microbiological (total counts, microbial profile, and diversity) and clinical outcomes (probing depth, bleeding on probing, and bone resorption) were assessed before tooth extraction and at 4 and 5 years postloading. Thirty-five microbial species were detected and quantified by DNA checkerboard analysis.</p><p><strong>Results: </strong>The microbiota significantly changed after 5 years of implant loading, with an increase in the abundance of periodontal pathogens and microbial diversity over time. The biofilm microbial profile and genome counts of implants were substantially different from the ones found in the remaining teeth at baseline, but no correlations between microbial taxa/counts and clinical outcomes were observed.</p><p><strong>Conclusion: </strong>The microbiota of dental implants was found to be different from the remaining teeth in patients with a history of periodontitis. Significant microbial shifts occurred in the microbiota of implants after 5 years of function; nonetheless, the microbiological changes did not impact clinical outcomes, which were consistent with health throughout the follow-up period.</p>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144250529","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 different factors on microleakage and fracture strength of CAD-CAM produced inlays.","authors":"Meryem Gülce Subaşı, Gürel Pekkan, Meral Arslan Malkoç, Hilal Ekşi Özsoy","doi":"10.1111/jopr.14080","DOIUrl":"https://doi.org/10.1111/jopr.14080","url":null,"abstract":"<p><strong>Purpose: </strong>To investigate the effects of occlusal finish line, material, cement, and aging type on the microleakage and fracture strength of inlay restorations in vitro.</p><p><strong>Materials and methods: </strong>Mesio-occluso-distal (MOD) inlay cavities were prepared in all teeth with an occlusal finish line in the form of a butt joint (BJ) or hollow-ground chamfer (HC) in one wall (buccal) (n = 80 each). Inlay restorations were designed using a computer-aided design and computer-aided manufacturing (CAD-CAM) device and milled from blocks (lithium disilicate ceramic [IPS e.max CAD] [LD] and resin nanoceramic [Lava Ultimate] [RN] [n = 40 each]). Inlay restorations were cemented to each tooth with dual-cure resin cement (RelyX Ultimate) (RU) or dual-cure self-adhesive resin cement (RelyX U200) (RU2) (n = 20 each). Specimens were divided into two groups (control [C] and thermomechanical aging [TM]) (n = 10 each). Microleakage and fracture strength tests were performed. The failure types were determined. Microleakage data (mm³) and fracture strength data (N) were analyzed by 4-way analysis of variance (ANOVA). Pairwise comparisons were made by Bonferroni testing. Fisher-Freeman-Halton testing was used to examine the relationship between categorical data. The correlation between microleakage and fracture strength was analyzed using Pearson's correlation analysis (p = 0.05).</p><p><strong>Results: </strong>Although the occlusal finish line, cement, and aging type affected the microleakage (p < 0.001), only the occlusal finish line type affected the fracture strength (p = 0.007). Relationships between the microleakage and fracture strength data were nonsignificant in all subgroups.</p><p><strong>Conclusions: </strong>For inlay restorations, an HC finish line and RU resin cement can be recommended.</p>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144250527","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":"High-speed sintering on monolithic zirconia: Effects on surface and antagonist wear in vitro.","authors":"Turki Alsubaie, Rayan Ahmed Alhebshi, Abdul Samad Khan, Mohammed M Gad, Abdulrahman A Balhaddad, Haidar Alalawi","doi":"10.1111/jopr.14083","DOIUrl":"https://doi.org/10.1111/jopr.14083","url":null,"abstract":"<p><strong>Purpose: </strong>This study aimed to assess the influence of zirconia's chemical structure and the sintering method on the wear behavior of the material itself and the opposing enamel.</p><p><strong>Materials and methods: </strong>Two different types of zirconia, 3 mol% yttria-stabilized tetragonal zirconia polycrystal (3Y-TZP (Whitepeaks Dental Solutions Inc., Hamminkeln, Germany) and 5 mol% yttria-stabilized tetragonal zirconia polycrystal (5Y-PSZ) (Whitepeaks Dental Solutions Inc., Hamminkeln, Germany), were fabricated via conventional and high-speed sintering methods and investigated for their wear behavior. The two-body wear of zirconia and opposing enamel was induced using a chewing simulation device under a vertical load of 50 N, and a sliding movement of 0.7 mm until 1,200,000 chewing cycles were achieved. A three-dimensional data measuring software (GeoMagic Control X, 2018) was used to calculate volume loss following cyclic fatigue. Two-way ANOVA and Tukey tests analyzed the data.</p><p><strong>Results: </strong>The results demonstrated that both material types, 3Y-TZP and 5Y-PSZ, and the sintering method, conventional or high-speed sintering, significantly affected the wear of enamel and zirconia (p < 0.001). The amount of enamel wear induced by 3Y-TZP and 5Y-PSZ high-speed sintering zirconia was reported to be 502.91 ± 44.91 and 635.07 ± 78.32 µm, respectively, which was significantly higher (p < 0.001) than the same materials when they were sintered conventionally (12.05 ± 0.90 and 13.40 ± 0.65 µm). Comparing the 3Y-TZP and 5Y-TZP high-speed sintered zirconia, the amount of wear of enamel associated with 5Y-PSZ was significantly higher than 3Y-TZP (p < 0.05). When the zirconia wear behavior was evaluated, minor surface loss of less than 15 µm was observed among all the groups.</p><p><strong>Conclusion: </strong>High-speed sintering of zirconia caused substantial enamel loss and minor wear on the zirconia itself. As a result, clinicians may consider using conventionally sintered zirconia to minimize the wear of the antagonist. Clinicians may consider using conventionally sintered zirconia to minimize the wear of the antagonist and avoid the associated clinical complications.</p>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144250528","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":"Clinical outcome of translucent zirconia and metal-ceramic posterior crowns in a digital workflow: A 5-year prospective randomized clinical trial.","authors":"Mustafa Gseibat, Veronica Rodriguez, Carlos Lopez-Suarez, Celia Tobar, Jesus Pelaez, Maria J Suarez","doi":"10.1111/jopr.14078","DOIUrl":"https://doi.org/10.1111/jopr.14078","url":null,"abstract":"<p><strong>Purpose: </strong>To evaluate and compare the clinical outcomes of translucent monolithic zirconia (TMZ) and metal-ceramic (MC) posterior crowns fabricated with digital workflow over a 5-year observation period.</p><p><strong>Materials and methods: </strong>Fifty-two patients, in need of a posterior crown, were included in the study and randomly divided into 2 groups to receive either TMZ or MC crowns (n = 30 each). The restorations were fabricated with a digital workflow and cemented with resin cement. The clinical outcomes and periodontal parameters were assessed at baseline and yearly for 5 years. Statistical analysis was performed using the Wilcoxon signed-rank test, Friedman test, and Mann-Whitney U test.</p><p><strong>Results: </strong>The survival rate at 5 years was 100% for both groups. Mechanical complications were detected in the MC group due to minor ceramic chipping. No biological complications were observed. All crowns were assessed as satisfactory in both groups. A significant variation in gingival index (GI) scores was observed in both groups throughout the observation period.</p><p><strong>Conclusions: </strong>Translucent monolithic zirconia may be considered a reliable alternative to MC posterior crowns within the assessed follow-up period. The digital workflow provided satisfactory clinical performance.</p>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144200611","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 angulation between multi-unit abutments on trueness of photogrammetry systems.","authors":"Abdulelah Andejani Bin Farrah, Leila Ahmadian, David Shonberg, Rand Harlow, Bin Yang","doi":"10.1111/jopr.14074","DOIUrl":"https://doi.org/10.1111/jopr.14074","url":null,"abstract":"<p><strong>Purpose: </strong>To compare the trueness between conventional impressions (CI) and photogrammetry for full-arch implant-supported prosthesis and to evaluate the effect of increased inter-abutment angulation on trueness.</p><p><strong>Materials and methods: </strong>Three edentulous reference models containing four multiunit abutment (MUA) replicas with different inter-abutment angulations were used: 0-degree (0D), 10-degree (10D), or 20-degree (20D). Three impression techniques were utilized on each model (n = 10): ICam4D-photogrammetry (IP), PIC-photogrammetry (PP), and CI. Standard tessellation language (STL) datasets of samples were created. A reverse engineering software (Geomagic ControlX; 3D Systems) was used to measure three-dimensional (3D) and angular deviations between samples and reference models. Means and standard deviations were calculated and analyzed using linear regression models. The significance level was set at p < 0.05.</p><p><strong>Results: </strong>The combined total mean 3D deviations were (29 ± 10 µm) for CI, (48 ± 7 µm) for PP, and (51 ± 8 µm) for IP. The combined total mean angular deviations were (0.16 ± 0.07 degrees) for CI, (0.46 ± 0.12 degrees) for IP, and (0.62 ± 0.23 degrees) for PP. Linear regression showed significant differences for 3D and angular deviations: The CI technique was significantly lower compared to PP and IP across all models (p < 0.001). Increased inter-abutment angulation showed significant differences within the PP and IP groups (p < 0.05), while no significant differences were seen within the CI groups (p > 0.05).</p><p><strong>Conclusion: </strong>Within the limits of the study, CI demonstrated statistically higher trueness compared to the two photogrammetry systems tested with up to 20 degrees of inter-abutment angulation, which may not be clinically significant. Increased inter-abutment angulation affected the photogrammetry scans to variable degrees.</p>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144192427","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}