Journal of Prosthetic Dentistry最新文献

{"title":"Fully digital workflow for retrofitting a new crown to an existing removable partial denture","authors":"Alexandru E. Petre DDS, MS, PhD ,&nbsp;Andrei Macris DDS, PhD ,&nbsp;Tudor C. Spinu DDS, PhD ,&nbsp;Andreea M. Smarandache DDS, PhD","doi":"10.1016/j.prosdent.2023.02.020","DOIUrl":"10.1016/j.prosdent.2023.02.020","url":null,"abstract":"<div><div><span><span>A fully digital technique for retrofitting a new crown to a removable partial denture (RPD) is presented. The conventional crown preparation was followed by intraoral scanning of the preparation, the antagonists, and the </span>occlusal relationship and by scanning the RPD both in situ and outside the </span>oral cavity<span>. All the standard tessellation language (STL) files were indexed in a design software program, and the new crown was designed. After conventional dynamic adaptation against the antagonist teeth in the software program, the existing RPD was designated as the antagonist cast, and a second regular static adaptation was performed. This straightforward approach produced a crown which fit the occlusal rest and reciprocating arm without sending the existing prosthesis to the dental laboratory.</span></div></div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"133 2","pages":"Pages 380-382"},"PeriodicalIF":4.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9231039","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 prerestorative short-term clear aligner therapy in restorative treatment planning","authors":"Bora Korkut DDS, PhD ,&nbsp;Tuna Unal DDS, PhD ,&nbsp;Naci Murat PhD ,&nbsp;Mutlu Özcan DMD, PhD","doi":"10.1016/j.prosdent.2023.02.024","DOIUrl":"10.1016/j.prosdent.2023.02.024","url":null,"abstract":"<div><h3>Statement of problem</h3><div><span><span>One of the major challenges in restorative dentistry<span> is to provide optimal esthetics in a minimally invasive way. The optimization of dental esthetics and function is directly related to the position and alignment of the </span></span>anterior teeth, but whether prerestorative clear </span>aligner therapy will enhance esthetics and minimize restorative needs is unclear.</div></div><div><h3>Purpose</h3><div>The purpose of this clinical study was to evaluate the effect of prerestorative maxillary and mandibular second premolar<span> to second premolar clear aligner therapy in minimizing the need for restorative treatment.</span></div></div><div><h3>Material and methods</h3><div><span>Fifty adult patients treated with clear aligners (Invisalign Go; Align Technology) were included in this study. Previously generated 3-dimensional orthodontic<span> simulations and clinical photographs in the ClinCheck/6.0 software program were used. Three restorative treatment plans for each participant were generated for initial (no aligners), Express (after using 7 aligners), and Lite Packages (after using 20 aligners) by 2 blinded restorative dentistry instructors. The maxillary and mandibular teeth in the smile-line (to the second premolars) were included. Assessment criteria were the estimated number of restorations, restoration surfaces and preparations and incisal edge inclusion, and the need for gingival leveling. The </span></span>Friedman test and Cochran Q test were used for statistical analyses (α=.05).</div></div><div><h3>Results</h3><div>A strong positive correlation was found between the 2 instructors (<em>P</em>&lt;.001). Estimated number of restorations (10 [3 to 16]^a) decreased significantly for Express (6 [0 to 14]^b) and Lite Packages (4 [0 to 8]^c) (<em>P</em>&lt;.001). The estimated number of restoration surfaces (28.5 [9 to 48]^a) decreased significantly for Express (15 [0 to 42]^b) and Lite Packages (9.5 [0 to 24]^c) (<em>P</em>&lt;.001). While the estimated number of teeth to be prepared for recontouring (7 [0 to 16]^a) was significantly less for Express (3 [0 to 10]^b) and Lite Packages (0 [0 to 4]^c) (<em>P</em>&lt;.001), the incisal edge inclusion (10 [3 to 16]^a) was significantly less for Express (6 [0 to 14]^b) and Lite Packages (4 [0 to 8]^c) (<em>P</em>&lt;.001). The need for gingival leveling (26 [52%]^a) decreased significantly for Express (20 [40%]^a) and Lite Packages (7 [14%]^b) (<em>P</em>&lt;.001).</div></div><div><h3>Conclusions</h3><div>Prerestorative short-term clear aligner therapy might conserve tooth structure and reduce the number of restorations. The application of the Invisalign Lite Package was more effective than the Invisalign Express Package for second premolar to second premolar alignment.</div></div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"133 2","pages":"Pages 455-463"},"PeriodicalIF":4.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9807003","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Essentials","authors":"","doi":"10.1016/S0022-3913(25)00018-6","DOIUrl":"10.1016/S0022-3913(25)00018-6","url":null,"abstract":"","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"133 2","pages":"Page A8"},"PeriodicalIF":4.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143444458","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 intraoral polishing on the surface property, phase change, and color stainability of monolithic zirconia.","authors":"Buket Karalar, Okan Karalar, Nuran Yanıkoğlu","doi":"10.1016/j.prosdent.2024.12.025","DOIUrl":"https://doi.org/10.1016/j.prosdent.2024.12.025","url":null,"abstract":"<p><strong>Statement of problem: </strong>How glazing and polishing affects the phase change and color stainability of monolithic zirconia restorations is unclear.</p><p><strong>Purpose: </strong>The purpose of this in vitro study was to investigate the phase changes and color stainability of monolithic zirconia after applying polishing systems and storage in different solutions.</p><p><strong>Material and methods: </strong>Sixty Ø15×1.2 ±0.01-mm disks of 2 monolithic zirconia materials (Katana, GC Initial Zircon) were prepared, glazed, and assigned to 3 groups: A control group with no additional treatment after glaze; and 2 groups in which the glaze layer was removed and the surfaces polished using 2 different polishing systems (OptraFine and Ceramiste Shofu). One specimen from each group was examined under a scanning electron microscope. All specimens were kept in solution (coffee and cola) for 28 days. Color differences were calculated using CIEDE 2000 (ΔE₀₀), and phase change was analyzed with an X-ray diffractometer. Data were analyzed with ANOVA and Tukey post hoc tests (α=.05).</p><p><strong>Results: </strong>Material type had a significant effect on phase change (P=.012), and the ΔE₀₀ values were significantly different between monolithic zirconia materials (P=.027). Katana had higher X_M values than GC, while GC had higher ΔE₀₀ values than Katana.</p><p><strong>Conclusions: </strong>Cola and coffee changed the color of zirconia materials. Although glaze was the most successful process, intraoral zirconia polishing kits also provided acceptable surface properties.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143080370","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":"Does the use of conventional complete dentures influence taste perception? A systematic review","authors":"Maria Eduarda Lemos Avelino DDS ,&nbsp;Taciana Emília Leite Vila-Nova DDS, MSc ,&nbsp;Rayanna Thayse Florêncio Costa DDS, MSc ,&nbsp;Eduardo Piza Pellizzer DDS, MSc, PhD ,&nbsp;Belmiro Cavalcanti do Egito Vasconcelos DDS, MSc, PhD ,&nbsp;Sandra Lúcia Dantas Moraes DDS, MSc, PhD","doi":"10.1016/j.prosdent.2023.02.018","DOIUrl":"10.1016/j.prosdent.2023.02.018","url":null,"abstract":"<div><h3>Statement of problem</h3><div><span>Although conventional complete dentures<span> are widely used, a systematic review of their influence on wearers' </span></span>taste perception is lacking.</div></div><div><h3>Purpose</h3><div><span>The purpose of this systematic review was to determine whether conventional complete dentures influence the taste perception of </span>edentulous patients.</div></div><div><h3>Material and methods</h3><div><span>This systematic review was registered in the International Prospective Register of Systematic Reviews (PROSPERO) (CRD42022341567), and the guidelines of the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) were followed. The guiding question was: “Does the use of complete dentures influence the taste perception of edentulous patients?” Two reviewers searched articles in the PubMed/MEDLINE, Scopus, Cochrane Library, and </span><span><span>https://clinicaltrials.gov</span><svg><path></path></svg></span> databases up to June 2022. The risk of bias in each study was assessed using the risk of bias in nonrandomized studies of interventions and the risk of bias based on the Cochrane risk of bias tool for randomized trials. The certainty of evidence was assessed using grading of recommendations, assessment, development, and evaluation (GRADE).</div></div><div><h3>Results</h3><div>A total of 883 articles were found with the search, and 7 were included in this review. Various changes in taste perception were identified in some of these studies.</div></div><div><h3>Conclusions</h3><div>The use of conventional complete dentures can influence the perception of the 4 primary tastes (sweet, salty, sour, and bitter) of edentulous patients, which may negatively interfere with the perception of flavor.</div></div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"133 2","pages":"Pages 438-444"},"PeriodicalIF":4.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9169233","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":"Antimicrobial effects of nano titanium dioxide and disinfectants on maxillofacial silicones","authors":"Pinar Cevik DDS, PhD ,&nbsp;Gulcin Akca MD, PhD ,&nbsp;Neset Volkan Asar DDS, PhD ,&nbsp;Emine Avci MD ,&nbsp;Sudarat Kiat-amnuay DDS, MS ,&nbsp;Burak Yilmaz DDS, PhD","doi":"10.1016/j.prosdent.2023.03.001","DOIUrl":"10.1016/j.prosdent.2023.03.001","url":null,"abstract":"<div><h3>Statement of problem</h3><div><span><span><span>Deficient hygiene of maxillofacial prostheses can be a source of infection, and various </span>disinfectants, including nano-oxides, have been suggested for the disinfection of silicone prostheses. While maxillofacial </span>silicones involving nano-oxides at different sizes and concentrations have been evaluated in terms of their mechanical and physical properties, reports are lacking on the antimicrobial effect of nano titanium dioxide (TiO</span>₂<span>) incorporated into maxillofacial silicones contaminated by different biofilms.</span></div></div><div><h3>Purpose</h3><div><span>The purpose of this in vitro study was to evaluate the antimicrobial effects of 6 different disinfectants and nano TiO</span>₂ incorporation into maxillofacial silicone contaminated with <span><span>Staphylococcus aureus</span><em>, Escherichia coli</em></span>, and <span><em>Candida albicans</em></span> biofilms.</div></div><div><h3>Material and methods</h3><div>A total of 258 silicone specimens (129 pure silicones and 129 nano TiO₂-incorporated silicones) were fabricated. Specimens in each silicone group (with or without nano TiO₂<span>) were divided into 7 disinfectant groups (control, 0.2% chlorhexidine gluconate<span><span>, 4% chlorhexidine gluconate, 1% sodium hypochlorite, neutral soap, 100% white </span>vinegar, and effervescent) in each biofilm group. Contaminated specimens were disinfected, and the suspension of each specimen was incubated at 37 °C for 24 hours. Proliferated colonies were recorded in colony-forming units per mL (CFU/mL). The differences in microbial levels among specimens were evaluated to test the effect of the type of silicone and the disinfectant (α=.05).</span></span></div></div><div><h3>Results</h3><div>Significant difference was found among disinfectants regardless of the silicone type (<em>P</em>&lt;.05). Nano TiO₂ incorporation showed an antimicrobial effect on <em>S aureus</em>, <em>E coli</em>, and <em>C albicans</em> biofilms. Nano TiO₂ incorporated silicone cleaned with 4% chlorhexidine gluconate had statistically less <em>C albicans</em><span> than pure silicone. Using white vinegar or 4% chlorhexidine gluconate led to no </span><em>E coli</em> on either silicone. Nano TiO₂ incorporated silicone cleaned with effervescent had fewer <em>S aureus</em> or <em>C albicans</em> biofilms.</div></div><div><h3>Conclusions</h3><div>The tested disinfectants and nano TiO₂ incorporation into silicone were effective against most of the microorganisms used in this study.</div></div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"133 2","pages":"Pages 608-614"},"PeriodicalIF":4.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9248490","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":"Accuracy of static computer-aided implant surgery (S-CAIS) using CAD-CAM surgical templates fabricated from different additive manufacturing technologies","authors":"Anshu Bathija BDS, MS ,&nbsp;Panos Papaspyridakos DDS, MS, PhD ,&nbsp;Matthew Finkelman PhD ,&nbsp;Yongjeong Kim DDS ,&nbsp;Kiho Kang DDS, MS ,&nbsp;Andre B. De Souza DMD, MSc","doi":"10.1016/j.prosdent.2023.03.025","DOIUrl":"10.1016/j.prosdent.2023.03.025","url":null,"abstract":"<div><h3>Statement of problem</h3><div>Different 3D printers are available for guided implant surgery, but studies that evaluate their source of errors and their cost-effectiveness are lacking.</div></div><div><h3>Purpose</h3><div>The purpose of this in vitro study was to compare the accuracy of different 3-dimensional (3D) printed surgical templates<span> made using different additive manufacturing technologies and to evaluate the effect of implant location on the accuracy of fully guided implant placement.</span></div></div><div><h3>Material and methods</h3><div><span><span>Fifty partially edentulous maxillary typodonts with edentulous sites in the right second premolar (SP), right </span>lateral incisor<span> (LI), left central incisor (CI), and left </span></span>first molar (FM) locations were scanned and printed from the standard tessellation language (STL) datasets. The study compared 5 groups for the fabrication of implant surgical templates: Varseo S–Bego (Bego), Polyjet–Stratasys (Poly), Low Force Stereolithography–FormLabs (LFS), P30+–Straumann (P30), and M2–Carbon (M2). After fully guided implant placement, the typodont was scanned, and the 3D implant positions were compared with the master model by superimposing the STL files. Descriptive statistics were calculated for groups and subgroups, and comparisons among the groups and subgroups were conducted via 2-way mixed analysis of variance, Tukey honest significant difference, and post hoc Bonferroni tests (α=.05).</div></div><div><h3>Results</h3><div>The results were site specific and not consistent within each group. For angle deviation, the within-group analysis for P30 demonstrated significantly lower values for implants positioned at site SP (1.4 ±0.8 degrees) than for sites LI (2.3 ±0.7 degrees; <em>P</em>=.001) and CI (2.3 ±0.8 degrees; <em>P</em>=.007). For 3D offset at base for implant CI, LFS was significantly higher than Bego (<em>P</em>=.002), Poly (<em>P</em>=.035), or M2 (<em>P</em>=.001); P30 was also significantly higher than Bego (<em>P</em>=.014) and M2 (<em>P</em>=.006). LFS had a significantly higher 3D offset at the tip than Bego (<em>P</em>=.001) and M2 (<em>P</em>=.022) for implant CI.</div></div><div><h3>Conclusions</h3><div>The choice of 3D printer seemed to influence fully guided implant surgery in terms of the final implant position compared with initial implant planning. However, although statistically significant differences were present across groups, all additive manufacturing technologies were within clinically acceptable values.</div></div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"133 2","pages":"Pages 524-529"},"PeriodicalIF":4.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9373840","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":"Role of gender and age in influencing dentist perceptions of effective leadership capabilities","authors":"Elizabeth O. Carr RDH, DHA ,&nbsp;Neil I. Park DMD ,&nbsp;Jason A. Griggs PhD ,&nbsp;Sreenivas Koka DDS, MS, PhD, MBA","doi":"10.1016/j.prosdent.2023.04.011","DOIUrl":"10.1016/j.prosdent.2023.04.011","url":null,"abstract":"<div><h3>Statement of the problem</h3><div>The characteristics of effective leaders in dentistry are unknown, especially as they relate to the perceptions of attributes associated with emotional intelligence.</div></div><div><h3>Purpose</h3><div>The purpose of this study was to survey dentists about their perceptions of the relative importance of emotional intelligence domains in effective leadership and in effective leaders with whom they have worked and to determine whether the differences were based on gender and age.</div></div><div><h3>Material and methods</h3><div>A survey was sent to a list of over 50 000 dentists. The survey asked respondents to rate important qualities found in effective leaders in general and to identify important qualities found in the most effective leaders with whom they had worked or by whom they had been mentored. Additionally, demographic information such as the age and gender of the participants was captured in the survey. Descriptive statistics were created and statistical differences (α=.05) between genders were determined.</div></div><div><h3>Results</h3><div><span>A total of 256 respondents completed the survey. Self-management and relationship management were perceived to be more important than social awareness or self-awareness. Adaptability was the highest ranked personal competence skill, while conflict management was perceived as the least important personal competence skill. The social competence skills of empathy, organizational awareness, influence, and inspirational leadership were similarly ranked as highly important. When asked to identify the most important leadership skill of previous leaders, respondents noted that conflict management was most important and emotional self-awareness was least important. Women viewed the attributes of adaptability, organizational awareness, and conflict management as more important. Men viewed </span>achievement orientation and coaching or mentoring as more important attributes of leaders. When answers were stratified for age group responses, younger respondents valued relationship management and adaptability, and whether their leader valued and exhibited conflict management more than older respondents. Older respondents were more likely to respond “yes” to valuing self-management and to whether their leader valued and exhibited inspirational leadership.</div></div><div><h3>Conclusions</h3><div>Different genders and different age groups view leadership skills in effective leaders differently. The results of this study indicate that women may need different leadership skills to lead colleagues of different ages.</div></div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"133 2","pages":"Pages 498-504"},"PeriodicalIF":4.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9557288","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 the ambient color lighting on the accuracy of complete arch implant scans recorded by using two intraoral scanners","authors":"Gastón Ochoa-López DDS, MSD ,&nbsp;Marta Revilla-León DDS, MSD, PhD ,&nbsp;Miguel Gómez-Polo DDS, PhD","doi":"10.1016/j.prosdent.2024.03.030","DOIUrl":"10.1016/j.prosdent.2024.03.030","url":null,"abstract":"<div><h3>Statement of problem</h3><div>The influence of different ambient factors including lighting has been previously studied. However, the influence of ambient color lighting settings on intraoral scanning accuracy remains uncertain.</div></div><div><h3>Purpose</h3><div>The purpose of this in vitro study was to assess the influence of ambient color lighting on the accuracy of complete arch implant scans recorded by using 2 intraoral scanners (IOSs).</div></div><div><h3>Material and methods</h3><div>An edentulous maxillary cast with 6 implant scan bodies was digitized by using a laboratory scanner (DW-7–140) to obtain a reference file. Two groups were created based on the IOS tested: TRIOS 4 (IOS-1) and i700 (IOS-2). Seven subgroups were developed depending on the ambient color lighting (red, green, blue, yellow, cyan, magenta, and white) (n=15). Scanning accuracy was analyzed by using a metrology software program (Geomagic Control X). The Kruskal-Wallis, 1-way ANOVA, and pairwise comparisons were used to analyze the data (α=.05).</div></div><div><h3>Results</h3><div>Significant trueness and precision values were found across the groups (<em>P</em>&lt;.05) and subgroups (<em>P</em>&lt;.05). For IOS-1, blue ambient lighting obtained the best trueness (19.8 ±1.8 µm) (<em>P</em>&lt;.05); in precision, white light (20.8 ±7.3 µm) and blue light (22.1 ±13.5) showed the best results (<em>P</em>&lt;.05). For IOS-2, white light showed the best trueness (51.9 ±16.7 µm); the best precision was obtained under magenta (38.6 ±10.4 µm) and yellow light (52.6 ±24.0 µm) (<em>P</em>&lt;.05).</div></div><div><h3>Conclusions</h3><div>The optimal ambient color lighting varied between the IOSs assessed. As the best condition for maximizing accuracy was not found, ambient color lighting must be individualized for the IOS system used.</div></div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"133 2","pages":"Pages 552-559"},"PeriodicalIF":4.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140778382","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 transcutaneous electrical nerve stimulation (TENS) on the electromyographic activity of human masticatory muscles in young people with normal occlusion","authors":"Xingyu Wang MS ,&nbsp;Hao Liu MS ,&nbsp;Xiangting Zhang MS ,&nbsp;Zhe Qu PhD ,&nbsp;Jiaming Zhao PhD","doi":"10.1016/j.prosdent.2024.03.022","DOIUrl":"10.1016/j.prosdent.2024.03.022","url":null,"abstract":"<div><h3>Statement of problem</h3><div>Transcutaneous electrical nerve stimulation (TENS) has been used in several clinical areas. However, the effect of TENS on the masticatory muscles of young individuals with normal occlusion remains unclear.</div></div><div><h3>Purpose</h3><div>The purpose of the study was to assess the effect of TENS on the surface electromyographic (sEMG) activity of masticatory muscles in a young population with normal occlusion.</div></div><div><h3>Material and methods</h3><div>Twenty residents (5 men and 15 women, mean 24.27 ±2.59 years) of Dalian Stomatological Hospital were enrolled as the study participants. A trained operator collected the required information from the participants. The experiment was divided into 3 stages: pre-TENS acquisition, TENS application, and post-TENS acquisition. The pre-TENS stage was performed using surface electromyography (sEMG) (Myotronics Inc) to acquire the potential values of masticatory muscles in the following 3 states 5 times each: resting, intercuspal occlusion (ICO), and maximum voluntary clench (clenching). The potential values of the anterior of temporalis (TA), the masseter (MM), the sternocleidomastoid (SCM), and the anterior digastric (DA) muscles were collected in the resting state, and TA and MM were collected in the ICO and clenching states. During the TENS application phase, a TENS Unit device (J5 Myomonitor) (J5) was used on each participant for 45 minutes. The post-TENS acquisition phase involved the same procedure as the pre-TENS phase. The experimental data were recorded, and the normality of each group was analyzed using the Shapiro-Wilk test in a statistical software program (IBM SPSS Statistics, v26.0). The paired-sample <em>t</em> test was used to compare the differences in the mean values of sEMG and the asymmetry index (As); the independent-sample <em>t</em> test was used to compare the activity index (Ac) and torque index (To) (α=.05).</div></div><div><h3>Results</h3><div>Significant differences were observed in the mean potential values of TA, MM, LSCM, and RDA before and after TENS in the resting state and RTA, LMM, and RMM before and after TENS in the clenching state (<em>P</em>&lt;.05). Moreover, although As_DA values showed a significant difference (<em>P</em>=.027) before and after TENS in the resting state, the differences in As values for the other muscles in the resting state were statistically similar. Furthermore, in each state, the mean values of Ac and To after TENS showed no significant differences before and after TENS (<em>P</em>&gt;.05).</div></div><div><h3>Conclusions</h3><div>The resting EMG values of the TA and MM differed significantly before and after TENS. After TENS, the resting EMG activity decreased, whereas the functional EMG activity tended to increase.</div></div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"133 2","pages":"Pages 489-497"},"PeriodicalIF":4.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140876705","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}