Journal of Prosthetic Dentistry最新文献

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Assessment of the internal connection of an angled screw channel system 斜螺槽系统内部连接的评定。
IF 4.3 2区 医学
Journal of Prosthetic Dentistry Pub Date : 2025-03-01 DOI: 10.1016/j.prosdent.2024.12.019
Seoyoun Hahn DDS, MSD , Van Ramos Jr DDS , Jonathan An DDS, PhD , Chandur P.K. Wadhwani BDS, MSD , Jeffrey E. Rubenstein DMD, MS , Alan Sutton DDS, MS , Kwok-Hung Chung DDS, MS, PhD
{"title":"Assessment of the internal connection of an angled screw channel system","authors":"Seoyoun Hahn DDS, MSD ,&nbsp;Van Ramos Jr DDS ,&nbsp;Jonathan An DDS, PhD ,&nbsp;Chandur P.K. Wadhwani BDS, MSD ,&nbsp;Jeffrey E. Rubenstein DMD, MS ,&nbsp;Alan Sutton DDS, MS ,&nbsp;Kwok-Hung Chung DDS, MS, PhD","doi":"10.1016/j.prosdent.2024.12.019","DOIUrl":"10.1016/j.prosdent.2024.12.019","url":null,"abstract":"<div><h3>Statement of problem</h3><div>The angled screw channel (ASC) design has been well accepted for implant prostheses. However, investigation into the behavior of the ASC connection is sparse.</div></div><div><h3>Purpose</h3><div>The purpose of this in vitro study was to assess the effect of cyclic loading on the internal connection of an ASC system compared with straight access systems by measuring reverse torque values (RTVs) and using microcomputed tomography (µCT) imaging.</div></div><div><h3>Material and methods</h3><div>Thirty dental implants (SLActive; Institut Straumann AG) were embedded in autopolymerizing acrylic resin and divided into 3 groups: Group V0, prefabricated abutment with a straight access channel; Group V25, prefabricated abutment with a 25-degree access channel; and Group C, cemented custom abutment with straight access. All specimens were initially secured with 10 Ncm using a digital torque gauge. A subset of specimens from each group (n=4) were randomly selected and assigned for µCT imaging examination and then reimaged after tightening to 35 Ncm. All specimens were subjected to cyclic loading for 5000 cycles with a loading force of 155 ±5 N at 1.2 Hz frequency in a 37 °C water bath using a fatigue machine. Repeat µCT imaging was done after cyclic loading for the representative specimens. The changes to the internal connection were measured on µCT images using a software program, and the RTV measurement of each specimen after cyclic loading treatment was recorded. The ANOVA test was used to analyze the statistical significance of the RTVs among groups (α=.05). The paired <em>t</em> test was used to conduct within-group comparisons of the measurement data.</div></div><div><h3>Results</h3><div>Mean ±standard deviation of RTVs varied from 29.05 ±2.99 Ncm to 29.75 ±2.61 Ncm, with no statistically significant differences among the 3 groups (<em>P</em>=.820). The distances from the base of the screw head to the apex of the screw-abutment-implant (SAI) system and internal air space volume within the groups V0 and V25 decreased significantly (<em>P</em>&lt;.05) between the 10-Ncm and 35-Ncm torque applications. Off-axis loading resulted in rotational movement of the abutment that might have created a tensional force on the implant screw.</div></div><div><h3>Conclusions</h3><div>Results for the prefabricated abutment groups (V0, V25) indicated that the RTVs were not affected by the amount of angle correction. A counterclockwise rotational movement of the abutment and screw within the SAI system would be formed during off-axial loading.</div></div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"133 3","pages":"Pages 844.e1-844.e9"},"PeriodicalIF":4.3,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142909813","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}
引用次数: 0
Digitally designed and milled implant-retained maxillofacial prosthesis for velopharyngeal closure in a patient with a nonsurgically treated cleft palate: A clinical report 数字化设计和铣制的种植体固位颌面修复体,用于非手术治疗腭裂患者的咽鼓管闭合:临床报告。
IF 4.3 2区 医学
Journal of Prosthetic Dentistry Pub Date : 2025-03-01 DOI: 10.1016/j.prosdent.2024.06.007
Ji-Hyun Park DDS, MSD , In-Sung Luke Yeo DDS, MSD, PhD
{"title":"Digitally designed and milled implant-retained maxillofacial prosthesis for velopharyngeal closure in a patient with a nonsurgically treated cleft palate: A clinical report","authors":"Ji-Hyun Park DDS, MSD ,&nbsp;In-Sung Luke Yeo DDS, MSD, PhD","doi":"10.1016/j.prosdent.2024.06.007","DOIUrl":"10.1016/j.prosdent.2024.06.007","url":null,"abstract":"<div><div>An implant-retained maxillofacial overdenture with a pharyngeal speech aid prosthesis was fabricated for a patient with a nonsurgically treated cleft palate who was unable to achieve velopharyngeal closure. Computer-aided design and computer-aided manufacturing were used to fabricate a metal-reinforced prosthesis using the Ivotion Denture System and subtractive manufacturing with geographic guides. Magnetic attachments were incorporated to improve the retention and stability of the prosthesis. Masticatory function, deglutition, and esthetics were found to be improved at the 6-month follow-up.</div></div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"133 3","pages":"Pages 908-914"},"PeriodicalIF":4.3,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141590588","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}
引用次数: 0
Comparative analyses of time efficiency and cost in fabricating fixed implant-supported prostheses in digital, hybrid, and conventional workflows: A systematic review and meta-analysis 在数字化、混合和传统工作流程中制作固定种植体支持修复体的时间效率和成本比较分析:系统回顾和荟萃分析。
IF 4.3 2区 医学
Journal of Prosthetic Dentistry Pub Date : 2025-03-01 DOI: 10.1016/j.prosdent.2024.06.024
Marion Bessadet DDS, MSc, PhD , Chantal Auduc DDS, MSc , Noémie Drancourt DDS, MSc , Emmanuel Nicolas DDS, MSc, PhD, HDR , Nada El Osta DDS, MSc, PhD, HDR
{"title":"Comparative analyses of time efficiency and cost in fabricating fixed implant-supported prostheses in digital, hybrid, and conventional workflows: A systematic review and meta-analysis","authors":"Marion Bessadet DDS, MSc, PhD ,&nbsp;Chantal Auduc DDS, MSc ,&nbsp;Noémie Drancourt DDS, MSc ,&nbsp;Emmanuel Nicolas DDS, MSc, PhD, HDR ,&nbsp;Nada El Osta DDS, MSc, PhD, HDR","doi":"10.1016/j.prosdent.2024.06.024","DOIUrl":"10.1016/j.prosdent.2024.06.024","url":null,"abstract":"<div><h3>Statement of problem</h3><div>Economic considerations affect whether new technologies are adopted in dental practice. Limited evidence exists regarding the time and cost efficiency of different workflows for fabricating implant-supported restorations.</div></div><div><h3>Purpose</h3><div>The purpose of this systematic review and meta-analysis was to compare the time and cost involved in fabricating fixed implant-supported prostheses using digital, hybrid, and conventional methods throughout the entire prosthetic treatment by analyzing both clinical and laboratory steps.</div></div><div><h3>Material and methods</h3><div>A systematic review was conducted following the Preferred Reporting Items for Systematic reviews and Meta-Analyses (PRISMA)-P 2015 guidelines. The methods and inclusion criteria were specified in a protocol registered with the International Prospective Register of Systematic Reviews (PROSPERO) (registration number CRD42023458734). The databases PubMed, Cochrane, and PROSPERO were searched using keywords: (Prosthodontic OR restorative dentistry OR denture) AND (CAD CAM OR Digital workflow OR Computer Dentistry OR Digital Design) AND (Economic OR cost OR Financial OR time efficiency). Two investigators selected articles independently.</div></div><div><h3>Results</h3><div>A qualitative synthesis of 12 articles published from 2010 to 2023 showed that digital scans took less time than conventional impressions (<em>P</em>&lt;.05) in 7 out of 9 articles. Additionally, 8 articles revealed significant reductions in laboratory working time with digital workflows, intermediate times with hybrid workflows, and longer times with conventional workflows (<em>P</em>&lt;.001). Meta-analysis confirmed the time efficiency of digital scanning over conventional impressions (Hedges g=1.65, 95% CI [0.33, 2.98]) and a substantial reduction in laboratory time with digital workflows compared with other workflows (Hedges g=6.55, 95% CI [2.69; 10.42]). However, no significant difference was found in adjustment time between digital and other workflows (Hedges g=0.91, 95% CI [−0.72; 2.55]). Direct laboratory costs were observed to be higher in conventional workflows compared with hybrid or digital workflows, with hybrid workflows also showing elevated costs compared with digital workflows (<em>P</em>&lt;.05).</div></div><div><h3>Conclusions</h3><div>The digital workflow demonstrates potential benefits in reducing scan time, laboratory processing time, and direct laboratory costs for implant-supported restorations in partial edentulism. Further research is needed to validate these findings, particularly for long-span implant-supported fixed partial prostheses.</div></div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"133 3","pages":"Pages 689-712"},"PeriodicalIF":4.3,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141788382","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}
引用次数: 0
Letter to the Editor regarding, “An up to thirty-year retrospective study on the success and survival of single unit and splinted implant-supported crowns in a dental school setting” 致编辑的信,内容涉及 "关于牙科学校环境中单体和夹板种植体支撑牙冠的成功率和存活率的长达三十年的回顾性研究"。
IF 4.3 2区 医学
Journal of Prosthetic Dentistry Pub Date : 2025-03-01 DOI: 10.1016/j.prosdent.2024.10.040
Pitchaipillai Sankar Ganesh PhD, Naji Naseef Pathoor MSc, Rajesh Kanna Gopal PhD
{"title":"Letter to the Editor regarding, “An up to thirty-year retrospective study on the success and survival of single unit and splinted implant-supported crowns in a dental school setting”","authors":"Pitchaipillai Sankar Ganesh PhD,&nbsp;Naji Naseef Pathoor MSc,&nbsp;Rajesh Kanna Gopal PhD","doi":"10.1016/j.prosdent.2024.10.040","DOIUrl":"10.1016/j.prosdent.2024.10.040","url":null,"abstract":"","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"133 3","pages":"Pages 938-939"},"PeriodicalIF":4.3,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142750749","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}
引用次数: 0
Residual dentin thickness and biomechanical performance of post-and-core-restored mandibular premolars: A finite element analysis study 后核修复下颌前磨牙残余牙本质厚度与生物力学性能的有限元分析。
IF 4.3 2区 医学
Journal of Prosthetic Dentistry Pub Date : 2025-03-01 DOI: 10.1016/j.prosdent.2024.11.014
Yi Sun BDS , Ze-feng Wang MSD , Yue-dan Xu DDS , Ling Zhang DDS
{"title":"Residual dentin thickness and biomechanical performance of post-and-core-restored mandibular premolars: A finite element analysis study","authors":"Yi Sun BDS ,&nbsp;Ze-feng Wang MSD ,&nbsp;Yue-dan Xu DDS ,&nbsp;Ling Zhang DDS","doi":"10.1016/j.prosdent.2024.11.014","DOIUrl":"10.1016/j.prosdent.2024.11.014","url":null,"abstract":"&lt;div&gt;&lt;h3&gt;Statement of problem&lt;/h3&gt;&lt;div&gt;Endodontically treated teeth often require post-and-core restorations for structural support because of extensive hard tissue loss. Assessment of the effect of the residual dentin thickness on the biomechanical performance of these restorations is lacking.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Purpose&lt;/h3&gt;&lt;div&gt;The purpose of this study was to evaluate the residual dentin thickness in mandibular premolars after post-and-core restorations using cone beam computed tomography (CBCT) and to analyze the stress distribution with finite element analysis (FEA).&lt;/div&gt;&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Material and methods&lt;/h3&gt;&lt;div&gt;The CBCT data from 236 mandibular premolars having undergone post-and-core restorations were examined. An imaging software program (NNT; NewTom) was used to measure the buccolingual and mesiodistal root diameters in cross-sections 5 to 11 mm from the radiologic apex. The CBCT derived measurements were subsequently integrated into an FEA model. A 3-dimensional (3D) mandibular premolar model reflecting the residual dentin thickness was created with a computer-aided design software program (Hypermesh 9.0; Altair Engineering). A static force of 100 N was applied directly to the buccal cusp tip at 45, 60, 75, and 90 degrees to the long axis of the tooth, and the stress distribution of dentin was analyzed by using an FEA software program (ANSYS APDL 18.0; Ansys Inc).&lt;/div&gt;&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Results&lt;/h3&gt;&lt;div&gt;CBCT analysis showed that the buccolingual root diameter was wider than the mesiodistal diameter and that the residual dentin thickness of the buccal aspect was approximately 0.3 mm thinner compared with the lingual aspect along the root. The proportions of residual dentin thickness values in the buccolingual direction of the mandibular premolar teeth no less than 1 mm exceeded 96.2% at 5 to 11 mm from the apex. The proportions of residual dentin thickness values in the mesiodistal direction of the mandibular premolar teeth &gt;1 mm were 92.1% and 88.2% at 11 mm from the apex after post space preparation and decreased further to 70.8% and 58.9% at 5 mm from the apex. The von Mises stresses of the mandibular premolar model with residual dentin thickness were mainly localized to the cervical area (region C, cervix) and the post apex (region A, apex) in the buccolingual direction. Tensile and compressive stress were concentrated on regions C and A on the buccal and lingual sides, respectively. The actual residual dentin thickness model demonstrated higher maximum tensile stress compared with the 1-mm residual dentin thickness model under various loading conditions.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Conclusions&lt;/h3&gt;&lt;div&gt;During the process of post space preparation in mandibular premolars, sufficient dentin thickness should be retained in the apical region. The tensile stresses of mandibular premolars after clinical post-and-core restoration were mainly concentrated in the cervical area and the post apex, and the maximum tensile stress value was higher t","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"133 3","pages":"Pages 820.e1-820.e8"},"PeriodicalIF":4.3,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142895523","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}
引用次数: 0
Comparison of implant placement and loading protocols for single anterior maxillary implants: A systematic review and network meta-analysis 上颌单前牙种植体植入和加载方案的比较:系统综述和网络荟萃分析。
IF 4.3 2区 医学
Journal of Prosthetic Dentistry Pub Date : 2025-03-01 DOI: 10.1016/j.prosdent.2024.05.033
Xinyi Qian DMD , Boldizsár Vánkos DMD , Kata Kelemen DMD , Noémi Gede PhD , Gábor Varga PhD , Péter Hegyi MD, PhD , Gábor Gerber DMD, PhD , Péter Hermann DMD, PhD , Árpád Joób-Fancsaly DMD, PhD , Krisztina Mikulás DMD, PhD
{"title":"Comparison of implant placement and loading protocols for single anterior maxillary implants: A systematic review and network meta-analysis","authors":"Xinyi Qian DMD ,&nbsp;Boldizsár Vánkos DMD ,&nbsp;Kata Kelemen DMD ,&nbsp;Noémi Gede PhD ,&nbsp;Gábor Varga PhD ,&nbsp;Péter Hegyi MD, PhD ,&nbsp;Gábor Gerber DMD, PhD ,&nbsp;Péter Hermann DMD, PhD ,&nbsp;Árpád Joób-Fancsaly DMD, PhD ,&nbsp;Krisztina Mikulás DMD, PhD","doi":"10.1016/j.prosdent.2024.05.033","DOIUrl":"10.1016/j.prosdent.2024.05.033","url":null,"abstract":"<div><h3>Statement of problem</h3><div>With increasing esthetic needs, patients prefer missing anterior teeth to be restored as soon as possible, but how the timing of implantation and prosthetic loading influences peri-implant tissue and the esthetic results remains unclear.</div></div><div><h3>Purpose</h3><div>The purpose of this systematic review and network meta-analysis of randomized controlled trials was to investigate and rank the hard-tissue and soft-tissue outcomes, esthetics, and patient satisfaction of single maxillary implant placement and loading protocols.</div></div><div><h3>Material and methods</h3><div>A systematic search was conducted to identify studies with at least a 1-year follow-up that compared different implant placement and loading protocols and reported on survival, marginal bone loss (MBL), soft tissue, and esthetics. A random effects model and a Bayesian approach were applied to compare protocols by using mean differences (MD) with 95% credible intervals (CrI) and surface under the cumulative ranking curve (SUCRA) values.</div></div><div><h3>Results</h3><div>A total of 43 articles were included, with a follow-up of 1 to 5 years. All protocols had high survival rates and no significant differences for 1-year or 2-year MBL. Immediate placement with immediate loading ranked first in pink and white esthetic scores and satisfaction and was statistically significantly better than immediate placement with delayed loading or late placement protocols in pink esthetic scores, where its advantage over late placement with late loading was also clinically relevant [MD: −1.74, CrI: −2.34 to −1.15].</div></div><div><h3>Conclusions</h3><div>Immediate implantation with immediate loading showed a considerable esthetic advantage over later rehabilitation, whereas only a slight difference in MBL resulted from different protocols.</div></div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"133 3","pages":"Pages 677-688"},"PeriodicalIF":4.3,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141759389","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}
引用次数: 0
Using a smartphone three dimensional scanning application (Polycam) to three dimensionally print an ear cast: A technique 使用智能手机三维扫描应用程序(Polycam)来三维打印耳朵模型:一种技术。
IF 4.3 2区 医学
Journal of Prosthetic Dentistry Pub Date : 2025-03-01 DOI: 10.1016/j.prosdent.2023.04.026
Ceyda Başak İnal DDS, PhD , Merve Bankoğlu Güngör DDS, PhD , Seçil Karakoca Nemli DDS, PhD
{"title":"Using a smartphone three dimensional scanning application (Polycam) to three dimensionally print an ear cast: A technique","authors":"Ceyda Başak İnal DDS, PhD ,&nbsp;Merve Bankoğlu Güngör DDS, PhD ,&nbsp;Seçil Karakoca Nemli DDS, PhD","doi":"10.1016/j.prosdent.2023.04.026","DOIUrl":"10.1016/j.prosdent.2023.04.026","url":null,"abstract":"<div><div>This technique describes the use of a smartphone application for scanning an ear for 3-dimensional (3D) printing of an auricular prosthesis cast. The intact ear was scanned by using a smartphone and a 3D scan application (Polycam). The standard tessellation language (STL) file of the 3D data was used to produce a mirror image of the ear, which was sent to the 3D printing center where a resin cast was printed. This technique is harmless for the patient compared with radiological imaging methods, more comfortable, and cost-effective and is straightforward for the maxillofacial prosthodontist.</div></div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"133 3","pages":"Pages 926-928"},"PeriodicalIF":4.3,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9924219","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}
引用次数: 0
Effect of chairside polishing systems on the surface roughness of different CAD-CAM denture base materials 椅边抛光系统对不同CAD-CAM义齿基托材料表面粗糙度的影响。
IF 4.3 2区 医学
Journal of Prosthetic Dentistry Pub Date : 2025-03-01 DOI: 10.1016/j.prosdent.2024.11.011
Nareudee Limpuangthip DDS, PhD , Sarita Apiromwijit DDS , Prarom Salimee DDS, PhD
{"title":"Effect of chairside polishing systems on the surface roughness of different CAD-CAM denture base materials","authors":"Nareudee Limpuangthip DDS, PhD ,&nbsp;Sarita Apiromwijit DDS ,&nbsp;Prarom Salimee DDS, PhD","doi":"10.1016/j.prosdent.2024.11.011","DOIUrl":"10.1016/j.prosdent.2024.11.011","url":null,"abstract":"&lt;div&gt;&lt;h3&gt;Statement of problem&lt;/h3&gt;&lt;div&gt;Adjusting and polishing a denture base affects surface roughness and, consequently, microbial adhesion. Since various computer-aided design and computer-aided manufacturing (CAD-CAM) denture base materials are available, the efficiency of chairside polishing systems to achieve a proper surface roughness should be investigated.&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 compare the surface roughness of milled and 3-dimensional (3D) printed denture base materials with that of heat-polymerized acrylic resin after the use of 2 different chairside polishing systems.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Material and methods&lt;/h3&gt;&lt;div&gt;Heat-polymerized (control), milled, and 3D printed denture base materials were tested. Laboratory polished and unpolished denture bases served as positive and negative controls. Specimens were divided into 2 chairside silicone polishing systems (AcryPoint system and Exa technique). Surface roughness was measured before and after polishing. Surface morphology of the unpolished and polished specimens was observed via scanning electron microscopy. The surface hardness of unpolished specimens was measured using a Vickers hardness tester. Stress-strain behavior of the silicone matrix and abrasive filler size of each polisher was assessed. The effects of denture base materials and polishing systems on surface roughness and hardness were evaluated using 1-way, 2-way, and repeated measures analyses of variance (ANOVA) (α=.05), along with Weibull proportional hazards regression to assess the likelihood of achieving clinically acceptable surface roughness. The Spearman correlation assessed the relationship between the hardness of unpolished denture bases and final surface roughness.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Results&lt;/h3&gt;&lt;div&gt;The surface roughness of all denture bases decreased with increased polishing duration, reaching a plateau after 60 seconds. For the heat-polymerized and milled dentures, the Exa technique consistently yielded lower roughness than the AcryPoint system (&lt;em&gt;P&lt;/em&gt;&lt;.001). Conversely, both polishing systems produced comparable surface roughness on the 3D printed denture base. The Vickers hardness of the unpolished milled denture was significantly higher than of the others (&lt;em&gt;P&lt;/em&gt;=.010). The stress-strain behavior of the polisher matrix revealed distinct characteristics between coarse or medium and fine polishers within each polishing system. The abrasive filler size of the AcryPoint coarse polisher was relatively larger than that of the Exa technique.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Conclusions&lt;/h3&gt;&lt;div&gt;Regardless of polishing protocols, the 3D printed denture base exhibited the highest surface roughness, followed by heat-polymerized and milled denture bases. The surface roughness of the polished denture was not related with the material hardness. For heat-polymerized and milled dentures, a chairside silicone polishing system can be used to attain a level of surface rou","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"133 3","pages":"Pages 891.e1-891.e8"},"PeriodicalIF":4.3,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142791947","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}
引用次数: 0
Preorthodontic functional long-term trial restoration of a worn dentition for optimizing outcomes: A clinical report 牙列磨损前正畸功能长期试验修复优化结果:一份临床报告。
IF 4.3 2区 医学
Journal of Prosthetic Dentistry Pub Date : 2025-03-01 DOI: 10.1016/j.prosdent.2023.04.030
Rami Albahri DDS, MMSc , Chen-Hsing Lin DDS, MMSc , Jason D. Lee DDS, MMSc , Hani Tohme DDS, MSc, PhD , Ghida Lawand BDS, MSc
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引用次数: 0
The Essentials
IF 4.3 2区 医学
Journal of Prosthetic Dentistry Pub Date : 2025-03-01 DOI: 10.1016/S0022-3913(25)00166-0
{"title":"The Essentials","authors":"","doi":"10.1016/S0022-3913(25)00166-0","DOIUrl":"10.1016/S0022-3913(25)00166-0","url":null,"abstract":"","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"133 3","pages":"Page A8"},"PeriodicalIF":4.3,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143593169","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}
引用次数: 0
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