Journal of Prosthetic Dentistry最新文献

{"title":"Effect of thiourethane on the polymerization and mechanical properties of composite resin: A systematic review.","authors":"Vitória Massoneto Piccolli, Rafael Leonardo Xediek Consani","doi":"10.1016/j.prosdent.2024.08.021","DOIUrl":"https://doi.org/10.1016/j.prosdent.2024.08.021","url":null,"abstract":"<p><strong>Statement of problem: </strong>Thiourethane has high chemical affinity with polymeric materials and its addition has been suggested for improving adhesives and composite resin. However, a systematic review of thiourethane addition is lacking.</p><p><strong>Purpose: </strong>The purpose of this systematic review was to analyze the articles in the dental literature that studied the effect of thiourethane added to the resin matrix of dental materials related to polymerization shrinkage and mechanical properties.</p><p><strong>Material and methods: </strong>The systematic review was prepared in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) 2020 guidelines and was registered in the Open Science Framework (osf.io/sb9my). The population, intervention, comparison, outcome, and study design (PICOS) were the following: composite resin, thiourethane addition, composite resin without addition, evaluation of polymerization and mechanical properties, and in vitro experimental studies. Initially, 204 articles were found, 150 of which were excluded because of duplication. After reading the titles and abstracts based on the application of eligibility criteria, 21 articles were selected for reading in full, and all were included in the systematic review. Three reviewers evaluated the articles independently in 2 phases based on the eligibility criteria (selection of the title and reading of the article in full), with the reviewers' doubts and discrepancies being analyzed and resolved in a meeting with the authors.</p><p><strong>Results: </strong>Most of the articles reported a significant improvement in the polymerization shrinkage and mechanical properties of experimental polymeric materials with the addition of oligomers.</p><p><strong>Conclusions: </strong>Thiourethane added to resin dental materials improved their polymerization shrinkage values and mechanical properties.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142391399","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":"One-piece endodontic crowns in posterior teeth: An overview of systematic reviews.","authors":"Susana Morimoto, Yuri Arakaki, Daniela P Raggio, Mutlu Özcan","doi":"10.1016/j.prosdent.2024.09.001","DOIUrl":"https://doi.org/10.1016/j.prosdent.2024.09.001","url":null,"abstract":"<p><strong>Statement of problem: </strong>The outcome of posterior nonvital teeth depends not only on endodontic factors but also on the effectiveness of the restoration. The growing trend in minimally invasive dentistry has led to increasing interest in 1-piece endodontic crowns as an alternative restoration. Nevertheless, their indications and longevity lack extensive exploration, thereby limiting their widespread acceptance in dental practice.</p><p><strong>Purpose: </strong>The purpose of this overview was to synthesize the available evidence from systematic reviews (SRs) about 1-piece endodontic crowns and to identify clinical outcomes such as survival, success rates, and patient-reported outcome measures (PROMs).</p><p><strong>Material and methods: </strong>A systematic search was performed in the electronic databases MEDLINE/PubMed, Cochrane, Web of Science, and OpenGrey, as well as a manual search, up to June 2024, with no language or time restriction. SRs that addressed clinical studies related to 1-piece endodontic crowns or endocrowns were included. The risk of bias and methodological quality was measured using the ROBIS and AMSTAR-2 tools, respectively.</p><p><strong>Results: </strong>The search identified 468 articles, of which 9 SRs were included. The best evidence reported in the SRs was that survival or success rates for ceramic and indirect resin 1-piece endodontic crowns were high at 5 years, similar to those for conventional crowns. Loss of retention was the main cause of failure with similar failure rates for molars and premolars. Evidence for the use of zirconia and metal 1-piece endodontic crowns is limited, and no SR was found that addressed PROMs. Methodological quality was considered low or critically low in most SRs. However, the risk of bias was low for 2 of the 3 SRs that provided the best evidence in the meta-analysis for ceramic and indirect resin 1-piece endodontic crowns. Overlap in the included studies was very high.</p><p><strong>Conclusions: </strong>Although the evidence generated by multiple RS only determined that ceramic and indirect resin 1-piece endodontic crowns can be a suitable and reliable option for restoring endodontically treated premolars and molars, with high success and survival rates comparable with those of complete crowns with posts, this overview concluded that it was not possible to provide firm conclusions regarding the outcomes of 1-piece endodontic crowns because of the lack of adequate high-quality primary studies with different materials, heterogenicity of the studies, variations in follow-up, preparation, and operative steps, and very high overlap of studies. Thus, additional well-designed clinical trials are necessary rather than SRs to strengthen the evidence in this area.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142391400","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":"Response to Letter to the Editor regarding, \"Antimycotic prophylaxis with multispecies probiotics against oral candidiasis in new complete denture wearers: A randomized clinical trial\".","authors":"Salma A Elsayes, Mohamed Sherine El Attar, Amany ElHadary, Aliaa Gamaleldin Aboulela, Marwa M Essawy, Ingy S Soliman","doi":"10.1016/j.prosdent.2024.09.019","DOIUrl":"https://doi.org/10.1016/j.prosdent.2024.09.019","url":null,"abstract":"","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142391401","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":"Artificial intelligence-driven automation of nasoalveolar molding device planning: A systematic review.","authors":"Ahmed Yaseen Alqutaibi, Hatem Hazzaa Hamadallah, Muath Saad Alassaf, Ahmad A Othman, Ahmad A Qazali, Mohammed Ahmed Alghauli","doi":"10.1016/j.prosdent.2024.09.011","DOIUrl":"10.1016/j.prosdent.2024.09.011","url":null,"abstract":"<p><strong>Statement of problem: </strong>Despite the increasing number of publications on applying artificial intelligence (AI) in the dental field, clarity regarding the performance of different approaches for nasoalveolar molding (NAM) planning and designing is lacking. Additionally, the overall robustness of the evidence in this field remains uncertain.</p><p><strong>Purpose: </strong>The purpose of this systematic review was to evaluate the role of AI in automating the prediction of anatomic landmarks and the design of NAM appliances.</p><p><strong>Material and methods: </strong>A comprehensive literature search was conducted in major databases up to April 2024 without language restrictions. Studies applying AI algorithms for NAM landmark detection or appliance design were included. Data on study characteristics, AI methods, outcomes, and limitations were extracted.</p><p><strong>Results: </strong>Six studies met the eligibility criteria. AI algorithms demonstrated high accuracy in automatically detecting landmarks and designing NAM appliances. Approaches ranged from fully automated to semi-automated workflows. Most studies reported significant time savings compared with manual methods.</p><p><strong>Conclusions: </strong>AI applications in NAM demonstrate substantial potential in improving workflow design, as demonstrated by the high accuracy reported in various studies. The incorporation of AI in NAM planning leads to a significant reduction in treatment appointment times when compared with conventional manual methods, thereby potentially decreasing the overall duration of treatment. Nevertheless, additional research is required to foster better collaboration between dental professionals and AI experts, ultimately facilitating more efficient clinical integration.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142378013","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":"Guided bone regeneration-associated tissue swelling: A digital three-dimensional assessment.","authors":"Vrisiis Kofina, Morvarid Monfaredzadeh, Swati Y Rawal, Andrew R Dentino, Maharaj Singh, Dimitris N Tatakis","doi":"10.1016/j.prosdent.2024.09.009","DOIUrl":"10.1016/j.prosdent.2024.09.009","url":null,"abstract":"<p><strong>Statement of problem: </strong>Postoperative swelling following guided bone regeneration (GBR) may affect the dimensions of interim restorations and/or delivery timing. However, quantitative assessment of post-GBR swelling or its evaluation for possible impact on regenerative outcomes is lacking.</p><p><strong>Purpose: </strong>The purpose of this prospective clinical study was to quantify post-GBR swelling and correlate it with clinical parameters and outcomes.</p><p><strong>Material and methods: </strong>Participants (n=25) undergoing standardized extraction and GBR protocol were recruited. Site-specific swelling was measured as ridge width, height, and volume changes based on intraoral scans recorded preoperatively, immediately postoperatively (IP), and at 2 days, 7 days, 14 days, and 4 months. The parameters and outcomes assessed were gingival and mucosal thickness, flap advancement, surgery duration, wound opening, and bone gain. The Friedman 2-way analysis of variance by ranks was performed, and the Spearman correlation coefficients (ρ) were computed (α=.05).</p><p><strong>Results: </strong>Ridge width and height peaked at 2 days (2.1 mm for both from IP; P<.001 for both) and reached IP levels by 7 days and 14 days (P>.999 and P=.888, respectively). At 4 months, both decreased significantly compared with IP (-4.2 mm and -1.9 mm respectively, P<.001). Volume increases peaked at 2 days (19%, P<.001), and peak swelling (2 days) preceded maximum wound opening (7 days). Bone width at 4 months was correlated with gingival thickness (ρ=0.45, P=.043), mucosal thickness (ρ=0.51, P=.021), and flap advancement (ρ=0.58, P=.008).</p><p><strong>Conclusions: </strong>Following GBR, site-specific swelling peaked on postoperative day 2 and subsided by day 7 (width) or 14 (height). Soft tissue thickness and flap advancement affected post-GBR bone width.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142375597","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":"Effects of print orientation and artificial aging on the flexural strength and flexural modulus of 3D printed restorative resin materials.","authors":"Shaymaa Mudhaffer, Julfikar Haider, Julian Satterthwaite, Nick Silikas","doi":"10.1016/j.prosdent.2024.08.008","DOIUrl":"10.1016/j.prosdent.2024.08.008","url":null,"abstract":"<p><strong>Statement of problem: </strong>The integration of computer-aided design and computer-aided manufacture (CAD-CAM) technology has revolutionized restorative dentistry, offering both additive and subtractive manufacturing methods. Despite extensive research on 3-dimensionally (3D) printed materials, uncertainties remain regarding the impact of print orientation on their mechanical properties, especially for definitive resin materials, necessitating further investigation to ensure clinical efficacy.</p><p><strong>Purpose: </strong>The purpose of this in vitro study was to investigate the influence of print orientation and artificial aging on the flexural strength (FS) and flexural modulus (FM) of 3D printed resin materials indicated for definitive and interim restorations.</p><p><strong>Material and methods: </strong>Specimens (2×2×25 mm) were additively manufactured in 3 orientations (0, 45, and 90 degrees) using five 3D printed resins: VarseoSmile Crownplus (VCP), Crowntec (CT), Nextdent C&B MFH (ND), Dima C&B temp (DT), and GC temp print (GC). A DLP 3D printer (ASIGA MAX UV) was used with postprocessing parameters as per the manufacturer recommendations. FS and FM were tested after storage in distilled water (DW) and artificial saliva (AS) for 24 hours, 1 month, and 3 months at 37 °C. Additional 2×2×16-mm specimens printed at 90 degrees were compared with the milled materials Lava Ultimate (LU) and Telio CAD (TC) after 24 hours of storage in AS at 37 °C (n=10). Measurements were conducted using a universal testing machine (Z020; Zwick/Roell) following the International Organization for Standardization (ISO) 4049 standard. Multiple way ANOVA, 1-way ANOVA, and Tukey HSD post hoc tests (α=.05) were used to analyze the data.</p><p><strong>Results: </strong>Print orientation significantly influenced the FS and FM of 3D printed resin materials, with the 90-degree orientation exhibiting superior mechanical properties (P<.05). Definitive resins (CT and VCP) exhibited higher FS and FM compared with interim resins (ND, DT, GC) at all time points (P<.001). LU had significantly higher FS and FM compared with other resins (P<.001), while TC had similar FS to definitive 3D printed resins. Aging time and media influenced FS and FM, with varying effects observed across different materials and time points. Strong positive correlations were found between filler weight and both FS (r=.83, P=.019) and FM. All materials met the minimum FS requirement of 80 MPa (ISO 4049) when printed at 90 degrees.</p><p><strong>Conclusions: </strong>The 90-degree orientation produced specimens with higher FS than 0- and 45-degree orientations. CT recommended for definitive restorations displayed higher FS compared with VCP and those intended for interim use after 3 months of aging. LU exhibited higher FS and FM than 3D printed resins, while TC had similar FS and FM to the latter. Aging effects on 3D printed resins were minimal and were material specific.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142375596","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":"Is the clinical performance of dental implants influenced by different macrogeometries? A systematic review and meta-analysis.","authors":"Gilda Rocha Dos Reis-Neta, Gabriel Felipe Marino Cerqueira, Michele Costa Oliveira Ribeiro, Marcela Baraúna Magno, Guido Artemio Maranón Vásquez, Lucianne Cople Maia, Altair A Del Bel Cury, Raissa M Marcello-Machado","doi":"10.1016/j.prosdent.2024.08.019","DOIUrl":"10.1016/j.prosdent.2024.08.019","url":null,"abstract":"<p><strong>Statement of problem: </strong>Although tapered and cylindrical implants have been widely used, a consensus on which macrogeometry offers better clinical performance is lacking.</p><p><strong>Purpose: </strong>The purpose of this systematic review and meta-analysis was to evaluate the influence of different macrogeometries (tapered and cylindrical) on the clinical performance of dental implants.</p><p><strong>Material and methods: </strong>The study was registered in the international prospective register of systematic reviews (PROSPERO) database (CRD42022347436). A search for clinical studies was conducted in 6 databases to identify randomized controlled clinical trials that evaluated the effectiveness of tapered and cylindrical implants placed in the maxilla or mandible of adult patients that had at least 1 clinical performance parameter as outcome. The risk of bias was evaluated using the revised Cochrane Risk-of-Bias Tool (RoB 2) tool. Meta-analyses on implant survival and success, marginal bone loss (MBL), implant stability (ISQ), and torque insertion (TI) were performed, with the certainty of evidence evaluated using the grading of recommendations, assessment, development, and evaluations (GRADE) checklist.</p><p><strong>Results: </strong>Of the 18 included studies, 7 had a low risk, 6 had some concerns, and 5 had a high risk of bias. Meta-analyses of survival (RR 0.99 [0.97, 1.01]; P=.38; I2=0%), implant success (RR 1.06 [0.99, 1.13] P=.08 I2=0%), 1-month MBL (MD -0.11 [-0.33, 0.10] P=.31 I2=98%), 3 months MBL (MD -0.21 [-0.27, 0.16] P=.26 I2=98%), 6 months MBL (MD -0.29 [-0.60, 0.01] P=.06 I²=74%), 1-year MBL (MD 0.01 [-0.07, 0.09] P=.77 I2=98%) and after 2 years MBL (MD -0.04 [-0.14, 0.07] P=.52 I2=0%), ISQ at implant installation (MD 0.35 [-0.72, 1.42] P=.52 I2=0%), %), after 2 months (MD 0.90 [-1.08, 2.87] P=.37 I2=0%) and at 1 year (MD -0.02 [-1.07, 1.03] P=.97 I2=0%), and insertion torque (MD 3.10 [-1.71, 7.92] P=.21 I2=80%) were statistically similar. However, tapered implants showed higher ISQ than cylindrical implants after 3 months (MD 1.20 [0.39, 2.01] P=.004 I2=17%). The certainty of evidence for the analyzed parameters ranged from high to very low.</p><p><strong>Conclusions: </strong>Both macrogeometries present good clinical performance, with certainty of evidence ranging from high to very low. Tapered implants showed better secondary stability at 3 months after implant installation, but with low certainty of evidence.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142375598","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":"Mapping the trends and impact of research collaboration between countries in oral implantology publications: A bibliometric analysis from 1999 to 2019","authors":"","doi":"10.1016/j.prosdent.2022.10.009","DOIUrl":"10.1016/j.prosdent.2022.10.009","url":null,"abstract":"<div><h3>Statement of problem</h3><div>Scientific collaboration provides a suitable strategy for enhancing the exchange of knowledge and technological development. However, the impact of collaboration in oral implantology research between countries and how it has been influenced by the income status of the country has not been previously evaluated.</div></div><div><h3>Purpose</h3><div><span>The purpose of this bibliometric analysis was to evaluate how collaboration between countries affected </span>oral implant publications and whether patterns of collaboration differ depending on the country’s income.</div></div><div><h3>Material and methods</h3><div>Articles were retrieved from 7 well-established journals whose scope included oral implantology at 5 time points (1999, 2004, 2009, 2014, and 2019). Data were extracted, and descriptive, bivariate, and multivariate logistic regression analyses were performed (α=.05).</div></div><div><h3>Results</h3><div>A total of 1944 articles were included; of which, 27.5% presented collaboration between countries. In 2009, 2014, and 2019, collaboration between countries was more likely to occur than at previous time points (<em>P</em>≤.005). Corresponding authors with a higher h-index (<em>P</em>&lt;.05) and authors from Europe and North America (<em>P</em>&lt;.001) were more likely to establish international connections. The possibility of collaboration between countries was higher for animal studies (<em>P</em>&lt;.001) and for articles published by Clinical Oral Implants Research (<em>P</em>=.026). Collaborations between high-income and upper-middle– or lower-middle–income countries were more likely to happen in 2014 and 2019 (<em>P</em>&lt;.05), as well as when the number of authors was higher (<em>P</em>=.015), compared with collaboration between high-income countries. With regard to the continent, European articles were less likely to have collaborations with upper-middle– or lower-middle–income countries (<em>P</em>&lt;.001).</div></div><div><h3>Conclusions</h3><div>The findings revealed that some parameters related to the study, authors, countries, and journals were statistically associated with the presence of collaboration between countries. However, the bibliometric parameters showed different trends when countries of different incomes established collaboration.</div></div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40707906","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":"One-time definitive attachment connection versus healing abutment placement for an implant-retained mandibular overdenture: Peri-implant metabolic activity","authors":"","doi":"10.1016/j.prosdent.2024.03.008","DOIUrl":"10.1016/j.prosdent.2024.03.008","url":null,"abstract":"<div><h3>Statement of problem</h3><div>Unscrewing the healing abutment can affect the soft tissue integration and apical migration of the biological width, which may compromise the integrity of peri-implant soft tissue.</div></div><div><h3>Purpose</h3><div>The purpose of this clinical study was to determine the level of glycosaminoglycan<span><span> (GAG) detected in the peri-implant crevicular fluid (PICF) between the test group (1-time abutment) and control group (healing abutment) for implant-retained mandibular </span>overdentures.</span></div></div><div><h3>Material and methods</h3><div><span>Two dental implants were installed in the canine regions of the mandibular ridge of 18 healthy completely edentulous participants using 2-stage surgery and a delayed loading protocol. At the second stage surgery, the implant on the right side was exposed, and a healing abutment was screwed onto the implant (control group), while on the left side the definitive ball abutment was screwed onto the implant (test group). After 10 days, the healing abutment in the control group was unscrewed and replaced with the definitive ball abutment. For both groups, the ball attachment was directly picked up to incorporate the attachment house to the mandibular denture. PICF samples were collected from the participants at 7 days, 3 months, and 6 months after overdenture use. Statistical analysis was done with an independent samples </span><em>t</em> test (α=.05).</div></div><div><h3>Results</h3><div>A significant difference was found in the volume of PICF and the level of GAG between the test and control groups at the 7-day evaluation period (<em>P</em>=.008, <em>P</em>=.002, respectively), while the volumes of PICF and the levels of GAG were not significantly different (<em>P</em>&gt;.05) at the other evaluation periods.</div></div><div><h3>Conclusions</h3><div>The 1-time abutment protocol offers biochemical and economic advantages compared with the conventional method of using the healing abutment before placement of the definitive attachment for an implant-retained overdenture with single attachments.</div></div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140784484","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":"Evaluating the effects of splinting implant scan bodies intraorally on the trueness of complete arch digital scans: A clinical study","authors":"","doi":"10.1016/j.prosdent.2024.03.004","DOIUrl":"10.1016/j.prosdent.2024.03.004","url":null,"abstract":"<div><h3>Statement of problem</h3><div>A predictable protocol for accurately scanning implants in a complete edentulous arch has not been established.</div></div><div><h3>Purpose</h3><div>The purpose of this clinical study was to investigate the effect of splinting implant scan bodies intraorally on the accuracy and scan time for digital scans of edentulous arches.</div></div><div><h3>Material and methods</h3><div>This single center, nonrandomized, clinical trial included a total of 19 arches. Definitive casts with scan bodies were fabricated and scanned with a laboratory scanner as the reference (control) scan. Each participant received 2 intraoral scans, the first with unsplinted scan bodies and the second with resin-splinted scan bodies. The scan time was also recorded for each scan. To compare the accuracy of the scans, the standard tessellation language (STL) files of the 2 scans were superimposed on the control scan, and positional and angular deviations were analyzed by using a 3-dimensional (3D) metrology software program. The Mann-Whitney U test was used to compare the distance and angular deviations between the splinted group and the unsplinted group with the control. The ANOVA test was conducted to examine the effect of the scan technique on trueness (distance deviation and angular deviation) and scan time (α=.05 for all tests).</div></div><div><h3>Results</h3><div>Statistically significant differences were found in the overall 3D positional and angular deviations of the unsplinted and splinted digital scans when compared with the reference scans (<em>P</em>&lt;.05). No statistically significant differences in overall 3-dimensional positional deviations (<em>P</em>=.644) and angular deviations (<em>P</em>=.665) were found between the splinted and unsplinted experimental groups. A faster scan time was found with the splinted group in the maxillary arch.</div></div><div><h3>Conclusions</h3><div>Conventional complete arch implant impressions were more accurate than digital complete arch implant scans. Splinting implant scan bodies did not significantly affect the trueness of complete arch digital scans, but splinting appeared to reduce the scan time. However, fabricating the splint was not considered in the time measurement.</div></div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140794771","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}