Journal of Prosthetic Dentistry最新文献

{"title":"Effect of free gingival graft dimension on postsurgical shrinkage in posterior implant placement: A prospective parallel cohort study.","authors":"Ning Wei, Ziyao Han, Yiping Wei, Wenjie Hu, Kwok-Hung Chung","doi":"10.1016/j.prosdent.2024.12.011","DOIUrl":"https://doi.org/10.1016/j.prosdent.2024.12.011","url":null,"abstract":"<p><strong>Statement of problem: </strong>The impact of free gingival graft (FGG) dimensions on the postsurgical shrinkage of keratinized tissue width (KTW) and surface area in posterior implant sites is unclear. Standardized assessments of how graft dimensions influence KTW and surface area shrinkage rates over a 6-month period after FGG are lacking.</p><p><strong>Purpose: </strong>The purpose of this prospective parallel cohort study was to examine the impact of the graft dimensions on the postsurgical shrinkage of KTW and surface area over a 6-month follow-up period after FGG in the posterior regions.</p><p><strong>Material and methods: </strong>Thirty partially edentulous participants with insufficient buccal KTW in the posterior regions were recruited. Before implant placement, participants received FGG procedures and were categorized into single-tooth and dual-tooth groups according to the range of recipient area. Intraoral scanning was performed before and after FGG and at subsequent follow-ups for 6 months. The KTW and surface area shrinkage rates of the grafted area were calculated and statistically analyzed by using the Student t test and ANOVA, and Bonferroni post hoc tests were performed to compare the shrinkage rate of KTW at various edentulous sites (α=.05).</p><p><strong>Results: </strong>The mean ±standard deviation KTW shrinkage rate was 18.84 ±5.11% over 6 months postoperatively, and the mean ±standard deviation SA shrinkage rate was 21.53 ±5.70%. The dual-tooth group had a statistically significantly higher KTW shrinkage rate (28.42 ±2.46%) when the second molar edentulous sites were involved (P<.05). Differences in surface area shrinkage rates between the single-tooth and dual-tooth groups over 6 months were statistically similar (P=.239). However, grafts in the second molar area exhibited significantly higher surface area shrinkage rates compared with those at the premolar and first molar areas (P<.001).</p><p><strong>Conclusions: </strong>The dimension of free gingival graft tissues did not significantly affect surface area shrinkage rates, and a mean 25% shrinkage rate occurred in the second molar areas.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142983845","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":"Global research interest and publication trends on guided surgery in implant dentistry: A metrics-based analysis.","authors":"Natalia de Oliveira Miranda, Lucas Menezes Dos Anjos, Aurélio de Oliveira Rocha, Felipe Gomes Dallepiane, Ariadne Cristiane Cabral da Cruz, Mariane Cardoso, Bruno Henriques, César Augusto Magalhães Benfatti, Ricardo de Souza Magini","doi":"10.1016/j.prosdent.2024.11.017","DOIUrl":"https://doi.org/10.1016/j.prosdent.2024.11.017","url":null,"abstract":"<p><strong>Statement of problem: </strong>Digital surgical guides improve precision by detailing the direction, position, and angle of implants, which reduces surgery time and complications. A bibliometric analysis of guided surgery in implant dentistry is lacking.</p><p><strong>Purpose: </strong>The aim of this metrics-based analysis was to analyze the trends and key characteristics of articles related to guided surgery in implant dentistry.</p><p><strong>Material and methods: </strong>The search was conducted in February 2024 on the Web of Science. The main characteristics of the studies were extracted and analyzed. Collaborative networks were generated using the Vosviewer software program. Dimension was consulted to measure Altmetric data. Correlation among data was determined by using the Spearman test.</p><p><strong>Results: </strong>A total of 799 articles published between 1993 and 2023 were included. Most were case reports or series (n=26) using static guided surgery (n=672), primarily for dental implant placement (n=754). The studies typically employed a combination of cone beam computed tomography (CBCT) and digital scanning (n=316) for surgical planning. The most frequently used software program was coDiagnostiX (n=89), and the most commonly used guide type was the printed guide (n=161). The country with the most articles was the USA (n=137), though Europe stood out as the leading continent (n=398). The Vosviewer demonstrated strong collaborations among authors. According to Dimensions, significant mentions were identified in Mendeley, news outlets, and X.</p><p><strong>Conclusions: </strong>An emerging trend in guided implant dentistry research was identified over the past 30 years through the use of software programs and 3D-printers for the fabrication of surgical guides. Europe showed the greatest interest in this topic, predominantly conducting research on static guided surgery for implant placement. Additional clinical studies and systematic reviews are needed.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142983848","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":"Computer-aided design and fabrication of statistically shaped nasal prostheses: A feasibility study.","authors":"Tjitske Bannink, Masu de Ridder, Shirley Bouman, Maarten J A van Alphen, Robert L P van Veen, Michiel W M van den Brekel, M Baris Karakullukçu","doi":"10.1016/j.prosdent.2024.12.008","DOIUrl":"https://doi.org/10.1016/j.prosdent.2024.12.008","url":null,"abstract":"<p><strong>Statement of problem: </strong>A nasal prosthesis may compensate for a partial or complete defect of the nose associated with trauma or amputation. However, the design and production is time-consuming, expensive, and expertize-dependent. Computer-generated prosthesis models and 3D printing can optimize the process.</p><p><strong>Purpose: </strong>The purpose of this pilot study was to evaluate a novel method for nasal prosthesis design utilizing statistical shape modeling (SSM) on a cohort of participants.</p><p><strong>Material and methods: </strong>The prosthesis shapes were generated by a design algorithm and fabricated through a 3-dimensionally (3D) printed mold. Combining a semi-automated algorithm with 3D printing reduced the dependence on expertize. A proof-of-concept assessment was conducted by enrolling 20 participants with total nose amputation with a conventionally created prosthesis (Cp). The faces of the participants were scanned with an optical scanner to acquire 3D surface scans that were loaded into the algorithm to create the statistically shape modeled prosthesis (SSMp). Participants were asked to digitally modify the SSMp by changing 9 parameters using the Scalismo Lab software program, allowing them to shape their preferred nose model, the patient-preferred prosthesis (PPp). The SSMps were fabricated using 3D printed molds and mailed to the participants for testing. They were asked to complete questionnaires comprising three FACE-Q modules: satisfaction with the nose and psychological and social function. In addition, the SSMp and Cp were compared with the PPp using anthropometric measurements.</p><p><strong>Results: </strong>Fifteen participants were able to fit the SSMp and complete the questionnaire. The median satisfaction, psychological, and social function scores were 56, 67, and 62, respectively. All 20 participants filled out the questionnaires on their Cp, with scores of 71, 67, and 62, respectively. Anthropometric measurements comparing the SSMp with the PPp showed that the algorithm generates noses with a wider nasal root, a larger nostril floor width to nasal width ratio, a smaller columella length to nasal width as well as nostril floor width ratio than the patients prefer according to their set PPp. Comparing the Cp with the PPp showed a larger nasal width to nasal height ratio and nasal root width to intercanthal distance ratio.</p><p><strong>Conclusions: </strong>SSM can facilitate the design and fabrication of nasal prostheses. Using the current models, however, patients were less satisfied than with prostheses made by the anaplastologist in consultation with the patient. Improving the SSM algorithm and incorporating patient manipulations into the resulting model should increase patient satisfaction and enable the production of nasal prostheses with minimal expert dependence.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142965491","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":"Mechanical and optical properties of additively manufactured denture base resin in different colors modified with antimicrobial substances: An in vitro study.","authors":"Rafat Sasany, Faris Z Jamjoom, Burak Yilmaz","doi":"10.1016/j.prosdent.2024.12.018","DOIUrl":"https://doi.org/10.1016/j.prosdent.2024.12.018","url":null,"abstract":"<p><strong>Statement of problem: </strong>Acrylic denture base resins are subject to colonization by oral and nonoral bacteria, contributing to the onset of denture stomatitis. However, how the addition of antimicrobial substances affects the mechanical and optical properties of additively manufactured denture base resin remains unclear.</p><p><strong>Purpose: </strong>The purpose of this in vitro study was to investigate the surface roughness, color stainability, and flexural strength of antimicrobial-modified, additively manufactured polymethyl methacrylate (PMMA) denture base resin in tooth and gingiva colors.</p><p><strong>Material and methods: </strong>Three antibacterial agents, e-poly-L-lysine+ methacryloyloxyethyl phosphorylcholine (e-MP), silver nanoparticles (AG-P), quaternized ammonium monomer (QA-P) synthesized via the reaction of octyl bromide and DMAEMA, were separately incorporated into tooth- or gingiva-colored 3-dimensionally (3D) printable PMMA specimens, simulating an implant-supported overdenture base or the artificial teeth (n=80). Unaltered specimens served as controls. Autopolymerizing acrylic resin was used to attach titanium matrix housings to gingiva-colored specimens. All specimens underwent coffee thermal cycling (CTC) comprising 10 000 cycles between 5 °C and 55 °C, and their color coordinates were measured. Surface roughness, color change (ΔE00), and flexural strength were calculated before and after CTC. The results were analyzed and compared by using ANOVA and the Tukey post hoc test (α=.05).</p><p><strong>Results: </strong>All antibacterial agent-incorporated specimens showed lower ΔE00 values than the control (P=.001), with eM-P exhibiting the least color change (P=.001). The control group had the highest post-CTC roughness (Ra) values (P<.001), while all test groups demonstrated higher flexural strength than the control (P=.001). CTC had no significant effect on flexural strength (P>.115).</p><p><strong>Conclusions: </strong>The addition of antimicrobial agents to 3D printable implant overdenture base resin in tooth and gingiva color affected the materials' surface properties, color stainability, and flexural strength. Smoother surface, lower color stainability, and higher flexural strength were observed with the addition of eM-P.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142950514","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":"Fully digital workflow for a CAD-CAM custom healing abutment with an optimal emergence profile: A dental technique.","authors":"Rania E Ramadan, Mahmoud Khamis Abdel Razek, Faten S Mohamed, Mervat E Abd-Ellah","doi":"10.1016/j.prosdent.2024.09.033","DOIUrl":"https://doi.org/10.1016/j.prosdent.2024.09.033","url":null,"abstract":"<p><p>The preoperative fabrication of well-contoured, computer-aided design and computer-aided manufacturing (CAD-CAM), custom healing abutments is essential for guiding soft tissue healing and saving chairside time. This dental technique involves a fully digital workflow to fabricate a CAD-CAM custom healing abutment that relies on preoperative digital implant planning. The healing abutment is designed with an optimal emergence profile that can predictably direct the anatomy of the peri-implant mucosa.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142950513","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":"Performance of the ChatGPT-3.5, ChatGPT-4, and Google Gemini large language models in responding to dental implantology inquiries.","authors":"Noha Taymour, Shaimaa M Fouda, Hams H Abdelrahaman, Mohamed G Hassan","doi":"10.1016/j.prosdent.2024.12.016","DOIUrl":"https://doi.org/10.1016/j.prosdent.2024.12.016","url":null,"abstract":"<p><strong>Statement of problem: </strong>Artificial intelligence (AI) chatbots have been proposed as promising resources for oral health information. However, the quality and readability of existing online health-related information is often inconsistent and challenging.</p><p><strong>Purpose: </strong>This study aimed to compare the reliability and usefulness of dental implantology-related information provided by the ChatGPT-3.5, ChatGPT-4, and Google Gemini large language models (LLMs).</p><p><strong>Material and methods: </strong>A total of 75 questions were developed covering various dental implant domains. These questions were then presented to 3 different LLMs: ChatGPT-3.5, ChatGPT-4, and Google Gemini. The responses generated were recorded and independently assessed by 2 specialists who were blinded to the source of the responses. The evaluation focused on the accuracy of the generated answers using a modified 5-point Likert scale to measure the reliability and usefulness of the information provided. Additionally, the ability of the AI-chatbots to offer definitive responses to closed questions, provide reference citation, and advise scheduling consultations with a dental specialist was also analyzed. The Friedman, Mann Whitney U and Spearman Correlation tests were used for data analysis (α=.05).</p><p><strong>Results: </strong>Google Gemini exhibited higher reliability and usefulness scores compared with ChatGPT-3.5 and ChatGPT-4 (P<.001). Google Gemini also demonstrated superior proficiency in identifying closed questions (25 questions, 41%) and recommended specialist consultations for 74 questions (98.7%), significantly outperforming ChatGPT-4 (30 questions, 40.0%) and ChatGPT-3.5 (28 questions, 37.3%) (P<.001). A positive correlation was found between reliability and usefulness scores, with Google Gemini showing the strongest correlation (ρ=.702).</p><p><strong>Conclusions: </strong>The 3 AI Chatbots showed acceptable levels of reliability and usefulness in addressing dental implant-related queries. Google Gemini distinguished itself by providing responses consistent with specialist consultations.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142932185","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":"Exploring the potential of machine learning models to predict nasal measurements through facial landmarks.","authors":"Remya Ampadi Ramachandran, Merve Koseoglu, Esra Incesu Cinka, Valentim A R Barão, Funda Bayindir, Alvin G Wee, Judy Chia-Chun Yuan, Cortino Sukotjo","doi":"10.1016/j.prosdent.2024.12.012","DOIUrl":"https://doi.org/10.1016/j.prosdent.2024.12.012","url":null,"abstract":"<p><strong>Statement of problem: </strong>Information on predicting the measurements of the nose from selected facial landmarks to assist in maxillofacial prosthodontics is lacking.</p><p><strong>Purpose: </strong>The objective of this study was to identify the efficiency of machine learning models in predicting the length and width of the nose from selected facial landmarks.</p><p><strong>Material and methods: </strong>Two-dimensional frontal and lateral photographs were made of 100 men and 100 women. Different eye, nose, and ear landmarks were manually measured on the digital images. Various machine learning regression techniques were validated to confirm the accuracy of the length of the nose (LON), nasal bridge length (NBL), lateral alar width (LAW), and nasal tip protrusion (NTP).</p><p><strong>Results: </strong>The regression models used in this study to predict the width and length of the nose parameters demonstrated a robust predictive capability, as evidenced by the high coefficient of determination score obtained (greater than 0.95). This coefficient of determination suggested the implemented model was able to effectively capture the underlying patterns and relationships within the data, leading to enhanced efficiency in predicting the outcomes. SHapley Additive ExPlanations values demonstrated that for the men-only and women-only datasets, the measurement of the auricular projection was the most important predictor of the LAW, the ear length was the most significant contributor to the LON, and the angle between the nasal bridge length and the ear length was the most significant contributor to the NBL and NTP. For the combined datasets, the distance between the superior edge of the ear to the line measuring the medial canthus width contributed most to the LON and NBL, the ear length was the most significant contributor to LAW, and the angle between the nasal bridge length and the ear length was the most significant predictor of NTP.</p><p><strong>Conclusions: </strong>All selected algorithms provided precise width and length predictions for all data groups and were highly correlated with the actual value. The frontal images can be used to predict the LON and LAW, whereas the lateral images can be used to evaluate the NBL and NTP.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142927043","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of different print orientations on properties and behavior of additively manufactured resin dental devices: A systematic review and meta-analysis.","authors":"Mohammed Ahmed Alghauli, Ahmed Yaseen Alqutaibi, Rola Aljohani, Sarah Almuzaini, Musab Hamed Saeed","doi":"10.1016/j.prosdent.2024.12.002","DOIUrl":"https://doi.org/10.1016/j.prosdent.2024.12.002","url":null,"abstract":"<p><strong>Statement of problem: </strong>Different factors affect 3-dimensionally (3D) printed resin products. However, evidence on the effect of the print orientation on resin dental devices is lacking.</p><p><strong>Purpose: </strong>The purpose of this systematic review and meta-analysis was to assess the impact of print orientation on the properties and accuracy of 3D printed implant surgical guides, occlusal devices, clear orthodontic retainers, and aligners.</p><p><strong>Material and methods: </strong>The electronic databases PubMed (MEDLINE), Cochrane, and Scopus were comprehensively searched in July 2024. A modified Consolidated Standards of Reporting Trials (CONSORT) statement was used to judge the included studies, and the data were analyzed by the RevMan 5.4 software program of the Cochrane collaboration by applying an inverse variance analysis (α=.05).</p><p><strong>Results: </strong>Twenty-six records were included. Complete arch, solid surgical guides with horizontal printing orientation exhibited the highest accuracy (P≤.01). Short-span surgical guides printed vertically showed relatively high accuracy (P≤.05). Hollow or mesh devices might not be affected by orientations. Occlusal device accuracy favored horizontal orientation, but correlated with the technology and materials, while the accuracy of orthodontic aligners revealed controversial findings, assuming the limited impact of orientation on orthodontic aligners. The cytotoxicity of occlusal devices was a material-related biological characteristic and unaffected by orientation. Although flexural strength favors horizontal orientation, conflicting results were observed for physical and other mechanical properties due to several variables.</p><p><strong>Conclusions: </strong>Horizontal orientation is recommended for printing complete arch surgical guides, while the accuracy of short surgical guides might favor vertical orientation. The physical mechanical properties depend on the printing orientation, technology, material, and printed parts, but horizontal orientation might produce parts with the best mechanical performance.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142927175","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 implant loading protocols and associated factors on the success rate of implant therapy: A retrospective clinical study.","authors":"Hanin Sager Hammoudeh, Lisa A Lang, Paola C Saponaro, Scott D Barnett, Leonardo Mohamad Nassani, Shereen A Azer, Yuan-Lynn Hsieh","doi":"10.1016/j.prosdent.2024.12.005","DOIUrl":"https://doi.org/10.1016/j.prosdent.2024.12.005","url":null,"abstract":"<p><strong>Statement of problem: </strong>Although immediate implant loading has shown promising clinical results and high survival rates, an increased risk of implant failure and complications has been reported. Achieving consistently predictable outcomes with this approach remains a challenge, but evidence-based guidelines to assist in selecting suitable patients are lacking.</p><p><strong>Purpose: </strong>The purpose of this retrospective clinical study was to investigate the success rate, survival rate, and complications of immediate implant loading compared with early and delayed loading. Also, it sought to identify the potential risk factors of immediate implant loading.</p><p><strong>Material and methods: </strong>Dental records for dental implants that were surgically placed at 1 center between January 2016 and October 2021 were reviewed for different loading protocols. Time from surgical placement to load was calculated, and the implants were divided into 3 groups: immediate (IL: <3 weeks), early (EL: 3 weeks to 3 months), and delayed (DL: >3 months). Patient, procedural, and restorative parameters were also recorded. Adverse events reported were implant failure and mechanical and biological complications, and the incident rates per 100 person-years (100 PY) for each adverse event were calculated. The Kaplan-Meier and Cox Proportional Hazards models with time to event approach were stratified by time-to-load (unit of analysis: the implant). Five-year survival rates were evaluated with Kaplan-Meier survival estimates. All statistical analyses were completed with a statistical software program (α=.05).</p><p><strong>Results: </strong>A total of 258 implants (20.1%) were in the IL group, 24 implants (1.9%) in the EL group, and 985 implants (76.8%) in the DL group. The incident rate of any adverse event was 3-fold more among implants in the IL group and EL groups as compared with the DL group (21.0/100 PY, 19/100 PY, 5.8/100 PY, respectively). Immediate implant loading was a significant predictor of implant failure (IL, HR: 30.94; 95% CI: 8.23-116.36, P=.001), failure to osseointegrate (IL, HR: 215.66; 95% CI: 7.17.98-2598, P=.001), loss of osseointegration (IL, HR: 23.77; 95% CI: 6.32-89.48, P=.001), any mechanical complications (IL, HR: 0.32; 95% CI: 0.11-0.93, P=.036), and peri-implantitis (IL, HR: 17.02; 95% CI: 1.54-17.02, P=.008). The 5-year survival rates of IL versus DL for any implant failure were 60% versus 99% and for peri-implantitis were 91% versus 99%. Diabetes and moderate periodontitis were associated with increased implant failure in the IL group.</p><p><strong>Conclusions: </strong>Immediate loading was a significant predictor of implant failure, mechanical complication, and peri-implantitis. Diabetes and moderate periodontitis might be risk factors with immediate loading.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142927026","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":"Bond strength comparison of chemically activated hard reline materials on CAD-CAM milled and conventional heat-polymerized PMMA denture bases.","authors":"Sasiya Bhumpattarachai, Joseph Y K Kan, Charles J Goodacre, Udochukwu E Oyoyo, Umaporn Vimonkittipong","doi":"10.1016/j.prosdent.2024.12.001","DOIUrl":"https://doi.org/10.1016/j.prosdent.2024.12.001","url":null,"abstract":"&lt;p&gt;&lt;strong&gt;Statement of problem: &lt;/strong&gt;Comprehensive data are needed on the performance of chemically activated, chairside hard reline materials when used with computer-aided design and computer-aided manufacturing (CAD-CAM) milled polymethyl methacrylate (PMMA) denture bases and conventionally processed bases. This lack of data affects decisions regarding the chairside reline material to be used for improving the fit and retention of relined complete dentures.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Purpose: &lt;/strong&gt;The purpose of this in vitro study was to evaluate and compare the shear bond strength (SBS) of 3 chemically activated, chairside hard reline materials on CAD-CAM milled and conventional heat-polymerized PMMA denture bases.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Material and methods: &lt;/strong&gt;A total of 120 cylindrical specimens were prepared and divided into 2 groups: 60 specimens fabricated from CAD-CAM milled PMMA and 60 specimens fabricated from conventional heat-polymerized PMMA. Following thermocycling to simulate aging, the specimens were divided into 3 subgroups (n=20) and relined with 1 of 3 chemically activated reline materials: Ufi Gel, Rebase II, and Unifast. After 24 hours of storage at 37 °C, the SBS was determined using a universal testing machine. Adhesive, cohesive, and mixed failures were examined using a stereomicroscope and scanning electron microscope (SEM). Statistical analysis was conducted using the generalized linear model (GLM) with post hoc comparisons using the Holm-Bonferroni correction. Chi-squared tests evaluated failure mode differences, and Weibull analysis determined bond strength reliability (α=.05).&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Results: &lt;/strong&gt;Ufi Gel and Unifast exhibited significantly higher SBS on CAD-CAM milled PMMA than conventional heat-polymerized PMMA (P&lt;.001). Rebase II also showed a significant difference between both denture base types (P=.001), but its overall SBS was lower. Ufi Gel achieved the highest SBS, while Rebase II had the lowest across both denture base types. Weibull analysis revealed that CAD-CAM milled PMMA with Ufi Gel had the highest bond strength and reliability. Conversely, conventional heat-polymerized PMMA with Rebase II had the weakest performance, marked by the lowest bond strength and increasing failure rates. SEM analysis showed more cohesive and mixed failures with CAD-CAM milled PMMA, while adhesive failures were more prevalent in conventional heat-polymerized PMMA. No significant difference in failure types was observed between the 2 denture base materials (P=.079).&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Conclusions: &lt;/strong&gt;This study demonstrated that CAD-CAM milled PMMA provided better bond strength and reliability compared with conventionally processed PMMA, particularly when combined with Ufi Gel. Ufi Gel exhibited the highest bond strength and reliability, making it suitable for long-term clinical use. Unifast also performed well but had slightly lower bond strength, while Rebase II showed the weakest bond strength and more adhesive fail","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142926920","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}