Journal of prosthodontic research最新文献

{"title":"Load distribution for screw-retained fixed dental prostheses with different implant-abutment connection: A nonlinear finite element analysis.","authors":"Diler Deniz, Nigar Baghirova, Kıvanç Akça","doi":"10.2186/jpr.JPR_D_26_00036","DOIUrl":"https://doi.org/10.2186/jpr.JPR_D_26_00036","url":null,"abstract":"<p><strong>Purpose: </strong>The purpose of this nonlinear finite element analysis study was to assess the impact of two different implant-restoration connection types on stress distribution at implant components and bone as well as displacement at the implant-abutment-restoration interface.</p><p><strong>Methods: </strong>Two different implant-restoration connection types (indirect and direct) were utilized in the modeling process, and two implant-supported distal 3-unit cantilevered restorations with surrounding bone were designed. Nonlinear friction contact was defined between the implant, abutment, cap, and occlusal screw components for indirect implant-restoration connection and between the implant, abutment, and screw components for direct implant-restoration connection. Vertical and oblique forces were applied separately to the restorations under four different loading conditions. The study assessed both the magnitude and distribution of the Von Mises stresses, as well as the characteristics of displacement.</p><p><strong>Results: </strong>Oblique load conditions resulted in increased stress and displacement values at the implant-abutment complex. Especially in the direct implant-restoration connection, the stress values in the screws and implants were notably higher. The highest displacement was observed in the screws for the indirect connection and in the abutments for the direct connection.</p><p><strong>Conclusions: </strong>Connection design may influence stress, strain, and displacement within the implant-abutment complex and surrounding bone. Different types of implant-restoration connections may lead to variations in these biomechanical parameters. Further clinical studies are required to evaluate the clinical relevance of these findings.</p>","PeriodicalId":16887,"journal":{"name":"Journal of prosthodontic research","volume":" ","pages":""},"PeriodicalIF":3.8,"publicationDate":"2026-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148829580","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":"Periodontal tissue responses following vertical root fracture repair with 4-META/MMA-TBB resin mixed with nano-hydroxyapatite.","authors":"Chuta Kooanantkul, Masako Nagasawa, Hikaru Koide, Katsumi Uoshima","doi":"10.2186/jpr.JPR_D_25_00213","DOIUrl":"https://doi.org/10.2186/jpr.JPR_D_25_00213","url":null,"abstract":"<p><strong>Purpose: </strong>Vertical root fracture (VRF) repair remains clinically challenging because of poor periodontal regenerative capacity, often leading to persistent deep periodontal pockets and impaired healing. This study aimed to evaluate periodontal tissue responses after VRF repair using 4-methacryloxyethyl trimellitate anhydride/methyl methacrylate tri-n-butylborane (4-META/MMA-TBB) resin cement (Super-Bond, SB) and nano-hydroxyapatite (naHAp)-incorporated SB (naHAp/SB) in a rat model.</p><p><strong>Methods: </strong>VRFs were induced in both maxillary first molars of Sprague-Dawley rats. Each fracture was repaired with one of the two materials, followed by tooth replantation. Periodontal tissue responses were assessed using electron probe microanalysis (EPMA), histological analysis, and immunohistochemistry targeting osterix (OSX), osteocalcin (OCN), and periostin (POSTN) markers at 2, 4, and 6 weeks post-replantation.</p><p><strong>Results: </strong>EPMA showed strong calcium and phosphorus deposition near the material-tissue interface in the naHAp/SB group. Conversely, only weak calcium and phosphorus signals were observed in the SB group. Histological analysis showed that the naHAp/SB group consistently exhibited minimal inflammatory responses throughout the study period. The SB group exhibited early mild-to-moderate inflammation, which gradually subsided over time. Compared with SB, the naHAp/SB group showed significantly higher expression of OSX at all time points (P < 0.01), OCN at 6 weeks (P < 0.01), and POSTN at 4 weeks (P < 0.01).</p><p><strong>Conclusions: </strong>Incorporating naHAp significantly enhanced osteogenic responses and created a more favorable environment for periodontal healing after VRF repair in vivo.</p>","PeriodicalId":16887,"journal":{"name":"Journal of prosthodontic research","volume":" ","pages":""},"PeriodicalIF":3.8,"publicationDate":"2026-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148829570","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":"Relationship between lifestyle diseases and oral function in older adults: The Toon Health Study.","authors":"Saki Takeda-Hino, Seiko Hongama, Koutatsu Maruyama, Ryoichi Kawamura, Yasunori Takata, Haruhiko Osawa, Daisuke Uchida","doi":"10.2186/jpr.JPR_D_26_00087","DOIUrl":"10.2186/jpr.JPR_D_26_00087","url":null,"abstract":"<p><strong>Purpose: </strong>Lifestyle diseases are established risk factors for oral function decline; however, the age-dependent dynamics of these associations, specifically between \"young-old\" and \"old-old\" phases, remain unclear. This study investigated the relationship between six major lifestyle diseases and seven oral function measures across age strata to identify the critical windows for medical and dental intervention.</p><p><strong>Methods: </strong>This cross-sectional analysis within the \"Toon Health Study\" recruited 395 community-dwelling individuals (mean age 68.8 ± 8.9 years), stratified into middle-aged, young-old, and old-old groups. Systemic status and oral function were evaluated using standard diagnostic criteria. Associations were analyzed using logistic regression models adjusted for age, sex, and family dentist status. The predicted probability plots visualized age-dependent associations.</p><p><strong>Results: </strong>Logistic regression analysis revealed age-dependent associations between diabetes mellitus (DM) and oral hypofunction. Although DM showed a protective association in the old-old group (odds ratio [OR] = 0.28, P = 0.014), it significantly increased the risk of oral hypofunction in the young-old group (OR = 7.75, P = 0.003). Decreased masticatory function was significantly associated with DM and obesity (P < 0.05). Although these conditions increased the risk of decreased masticatory function in the young-old group, none of the participants with DM in the old-old group exhibited such an impairment.</p><p><strong>Conclusions: </strong>DM and OBE may exacerbate oral function decline in young-old individuals more strongly than aging itself, whereas continuous dental care may mitigate these effects in the old-old. This highlights the importance of integrating age-specific oral management with lifestyle disease prevention.</p>","PeriodicalId":16887,"journal":{"name":"Journal of prosthodontic research","volume":" ","pages":""},"PeriodicalIF":3.8,"publicationDate":"2026-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148725051","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":"Digital assessment of rest seat and guide plane preparations in removable partial denture education: A pilot study.","authors":"Tasuku Yoshimoto, Yoko Hasegawa, Jumpei Okawa, Shohei Kodama, Weng EnChih, Shoko Hori, Hinako Takano, Natsuki Kishimoto, Masaki Sakata, Kaho Yamada, Ma Therese Sta Maria, Min Thu Ya, Kazuhiro Hori","doi":"10.2186/jpr.JPR_D_25_00132","DOIUrl":"https://doi.org/10.2186/jpr.JPR_D_25_00132","url":null,"abstract":"<p><strong>Purpose: </strong>This study evaluated the reliability, efficiency, and educational validity of digital model-based assessment in removable partial denture (RPD) training compared to conventional methods in terms of agreement, evaluation time, and assessment tendencies.</p><p><strong>Methods: </strong>Thirty-seven dental students prepared the occlusal rest seats and distal guide planes on mandibular resin models. The preparations were scanned (TRIOS3^®, 3Shape) to generate digital models. Eleven dentists (three prosthodontic specialists [experts] and eight non-specialists) independently evaluated the jaw and digital models using a standardized rubric to assess the undercuts, surface roughness, sharp edges, and dimensional accuracy. Preparations that met all criteria were classified as PERFECT. Statistical analyses included agreement coefficients and exploratory comparisons of the categorical and continuous outcomes.</p><p><strong>Results: </strong>Digital assessments required longer evaluation times than conventional assessments. Variations in the evaluative tendencies were observed between the modalities, particularly for surface roughness. The intra-rater agreement suggested moderate levels for rest seat size and guide plane roughness/size (κ = 0.44-0.53), whereas lower agreement was observed for rest undercut, rough surface, and sharp edge. Agreement for the composite PERFECT criterion tended to be higher in digital models than in jaw models (κ = 0.34 vs. 0.12, respectively). The experts tended to assign fewer PERFECT scores to digital assessments.</p><p><strong>Conclusions: </strong>Digital assessment showed advantages in standardization and agreement, but required more time and had limited reliability for tactile-dependent criteria. It may be more suitable for quantitative parameters and hybrid approaches may improve its application in RPD education.</p>","PeriodicalId":16887,"journal":{"name":"Journal of prosthodontic research","volume":" ","pages":""},"PeriodicalIF":3.8,"publicationDate":"2026-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148620305","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 high filler content of zirconia and ceramic on the properties of 3D-printed resin for dental restorations.","authors":"Jung-Hwa Lim, Seong-Keun Cho, Sang-Yub Lee, Reuben Kim, Won-Suck Oh, Jong-Eun Kim","doi":"10.2186/jpr.JPR_D_25_00277","DOIUrl":"https://doi.org/10.2186/jpr.JPR_D_25_00277","url":null,"abstract":"<p><strong>Purpose: </strong>To evaluate the mechanical and physical properties of three-dimensional (3D)-printed resins containing >50 wt% inorganic fillers, and compare them with a computer-aided design and computer-aided manufacturing (CAD-CAM) nano-hybrid ceramic resin block and a conventional resin-based 3D-printed material.</p><p><strong>Methods: </strong>3D-printed resins, including an unfilled resin (RP), a high-filler resin containing >50 wt% inorganic fillers (RCP), and a zirconia-containing high-filler resin (>60 wt% inorganic fillers; RZP), as well as a CAD-CAM nano-hybrid ceramic resin block (RCM), were investigated. Biaxial flexural strength, Weibull reliability, surface hardness, water sorption, and solubility were evaluated. Data were analyzed using one-way analysis of variance (ANOVA), followed by Bonferroni post hoc tests (α = 0.05). Weibull probability analysis with 95% confidence intervals was used to determine the characteristic strength and reliability for each material group.</p><p><strong>Results: </strong>The RZP exhibited the highest flexural strength, followed by RCP and RCM, all outperforming the RP. RZP and RCP demonstrated superior absolute strength but greater variability, while RCM demonstrated higher reliability. Vickers hardness was highest in RCM, though both high-filler resins exceeded RP. RZP showed the greatest water sorption, and RCM showed the lowest solubility. Surface and elemental analyses supported differences in fracture behavior and filler composition.</p><p><strong>Conclusions: </strong>High-filler 3D-printed resins show mechanical performance comparable to that of CAD-CAM nano-hybrid ceramic resin blocks and are promising materials for restorations requiring enhanced strength and durability.</p>","PeriodicalId":16887,"journal":{"name":"Journal of prosthodontic research","volume":" ","pages":""},"PeriodicalIF":3.8,"publicationDate":"2026-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148620364","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Clinical survival of CAD-CAM composite resin crowns in anterior and posterior teeth: A four-year retrospective cohort study.","authors":"Asako Fuchida, Fumiko Nishio, Tadahiro Higashinakao, Masatomo Ibuki, Kanako Hodate, Asami Uenodan, Kyoko Sugimoto, Sadaaki Murahara, Hiroyuki Minami","doi":"10.2186/jpr.JPR_D_26_00066","DOIUrl":"https://doi.org/10.2186/jpr.JPR_D_26_00066","url":null,"abstract":"<p><strong>Purpose: </strong>Although computer-aided design/computer-aided manufacturing (CAD-CAM) composite resin crowns are widely used, complications such as debonding and fracture have been reported. This study aimed to evaluate the clinical survival of CAD-CAM composite resin crowns, including those applied to anterior teeth, and identify factors influencing long-term prognosis.</p><p><strong>Methods: </strong>This retrospective cohort study included 402 CAD-CAM composite resin crowns fabricated and cemented at Kagoshima University Hospital between September 2020 and August 2024. Four resin block materials (Materials I-IV) were selected according to the tooth region based on Japan's National Health Insurance classification. Patient characteristics, abutment conditions, antagonist tooth, luting agents, and operators were extracted from medical records. Clinical outcomes were analyzed using Kaplan-Meier survival analysis and multivariate Cox proportional hazards regression.</p><p><strong>Results: </strong>During a mean follow-up period of 30 months, 41 crowns (10.2%) experienced complications, primarily debonding (n = 22). The cumulative success rate was 82.9%. Crowns on vital teeth demonstrated a significantly higher hazard ratio than those on metal or resin cores (P < 0.05). In contrast, crowns fabricated from Material IV for anterior teeth were associated with a significantly lower hazard ratio (P < 0.05).</p><p><strong>Conclusions: </strong>CAD-CAM composite resin crowns demonstrated acceptable midterm clinical performance comparable to that reported in previous studies. Crowns placed on vital teeth were associated with an increased risk of failure, whereas anterior crowns fabricated from Material IV had a reduced risk of failure. These findings suggest that biomechanical factors, accurate tooth preparation, and proper execution of bonding procedures are critical for clinical success.</p>","PeriodicalId":16887,"journal":{"name":"Journal of prosthodontic research","volume":" ","pages":""},"PeriodicalIF":3.8,"publicationDate":"2026-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148536237","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":"Treatment efficacy of non-metal and single-retainer resin-bonded prostheses for anterior single-tooth loss: A systematic review.","authors":"Hajime Minakuchi, Shoko Miura, Akikazu Shinya, Takuya Horimai, Yoshizo Matsuka, Katsushi Tamaki, Kazuo Okura, Akira Nishiyama, Masamitsu Oshima, Masaki Kakudo, Kazuya Doi, Yoshihiro Yamaguchi, Megumi Watanabe, Kazuyoshi Baba, Takuo Kuboki","doi":"10.2186/jpr.JPR_D_25_00320","DOIUrl":"https://doi.org/10.2186/jpr.JPR_D_25_00320","url":null,"abstract":"<p><strong>Purpose: </strong>This systematic review aimed to evaluate the treatment efficacy of resin-bonded fixed partial dentures (RBFPDs) in adults with single-tooth loss. The target interventions included the use of: (1) non-metal retainers, (2) single-retainer (SR) RBFPDs, and (3) non-metal SR-RBFPDs, compared with conventional metal and two-retainer (TR) RBFPDs.</p><p><strong>Study selection: </strong>A comprehensive literature search of the MEDLINE, CENTRAL, Web of Science, and Ichushi databases up to November 30, 2025 was conducted; additionally, reference list screening and manual searches were performed by an external organization. Target outcomes included RBFPD survival rate, abutment tooth prognosis, oral health-related quality of life (OHRQoL), patient satisfaction, esthetics, periodontal status, and oral function. Two reviewers independently conducted study selection, data extraction, and risk of bias assessment, with disagreements resolved through discussion.</p><p><strong>Results: </strong>A total of eight, six, and three articles were included for each respective comparison. There were no significant differences in survival rate, esthetics, OHRQoL, patient satisfaction, or periodontal condition between non-metal and metal retainer RBFPDs. Comparisons involving SR-RBFPDs suggested a tendency toward favorable survival and abutment tooth outcomes; however, these findings were based on a limited number of studies and should be interpreted with caution. No clear differences in OHRQoL, patient satisfaction, or esthetics were identified.</p><p><strong>Conclusions: </strong>Based on the available evidence, non-metal RBFPDs and SR-RBFPDs may be considered viable treatment options compared with metal and/or TR-RBFPDs. However, the current evidence is limited and applies primarily to anterior single-tooth loss. Further well-designed clinical studies are required to clarify the indications and long-term outcomes of SR-RBFPDs.</p>","PeriodicalId":16887,"journal":{"name":"Journal of prosthodontic research","volume":" ","pages":""},"PeriodicalIF":3.8,"publicationDate":"2026-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148456116","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":"Intra- and inter-examiner reliability of an occlusal force-measuring device equipped with a capacitive-type pressure-mapping sensor sheet.","authors":"Yoshihiro Kugimiya, Masaharu Murakami, Yu Nakano, Honoka Sato, Sae Nagai, Junya Nakamura","doi":"10.2186/jpr.JPR_D_25_00164","DOIUrl":"10.2186/jpr.JPR_D_25_00164","url":null,"abstract":"<p><strong>Purpose: </strong>To clarify the intra- and inter-examiner reliability of an occlusal force-measuring device equipped with a capacitive-type pressure-mapping sensor sheet in older adults.</p><p><strong>Methods: </strong>Thirty-eight individuals (23 women) aged ≥65 (mean ± SD: 79.3±6.1) years were included. The numbers of present and functional teeth were visually examined. Occlusal force was measured using the Oramo-bf device (Sumitomo Riko Co., Aichi, Japan). To evaluate intra-examiner reliability, one dentist measured each participant's occlusal force thrice and calculated the intraclass correlation coefficient (ICC; case 1) and the coefficient of variation (CV). To examine inter-examiner reliability, three dentists measured the occlusal force once per participant and calculated the ICC case 2.</p><p><strong>Results: </strong>The median (first quartile-third quartile [Q1-Q3]) numbers of present and functional teeth were 22.5 (18-27) and 28 (26-28), respectively. The median (Q1-Q3) occlusal force measured by a single examiner across the measurements was 604.8 (261.7-731.5) N. The ICC for a single measurement by one examiner based on all three measurements per participant was 0.982 (95% confidence interval [CI]: 0.969-0.990). The ICC (1,3) for the mean of three repeated measurements by one examiner was 0.994 (95% CI: 0.990-0.997). The mean ± SD CV was 0.052 ± 0.046. The ICC (2,1) for inter-examiner reliability was 0.950 (95% CI: 0.917-0.972).</p><p><strong>Conclusions: </strong>This study revealed high intra- and inter-examiner reliability of measurements obtained using an occlusal force-measuring device equipped with a capacitive-type pressure-mapping sensor sheet. This device may provide reliable results with a single measurement, regardless of the examiner.</p>","PeriodicalId":16887,"journal":{"name":"Journal of prosthodontic research","volume":" ","pages":"398-403"},"PeriodicalIF":3.8,"publicationDate":"2026-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145437835","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":"Cementing innovation: High-energy titanium abutments via UV photofunctionalization unlock superior crown retention.","authors":"Rune Shibata, Jasper Kim, Jeong Kim, Nicholas Her, Keiji Komatsu, Takanori Matsuura, Akiko Yoneda, Justin Choi, Denny Chao, Takahiro Ogawa","doi":"10.2186/jpr.JPR_D_25_00143","DOIUrl":"10.2186/jpr.JPR_D_25_00143","url":null,"abstract":"<p><strong>Purpose: </strong>Evaluation of the impact of ultraviolet (UV) photofunctionalization on titanium-cement interfaces, specifically its ability to transform titanium into a high-energy surface and enhance crown retention.</p><p><strong>Methods: </strong>Commercial titanium abutments (standard: 4.0 mm; long: 5.5 mm) were treated with vacuum UV (VUV) light at 172 nm for 1 min. Milled polymethyl methacrylate crowns were cemented using resin-modified glass ionomer cement. Tensile testing quantified the maximum tensile load and interfacial energy. Surface changes were analyzed using contact angle measurements and X-ray photoelectron spectroscopy (XPS). Post-failure interfaces were examined via scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX).</p><p><strong>Results: </strong>UV-treated standard-length abutments exhibited a 4.1-fold increase in maximum tensile load and 27-fold increase in bonding energy compared with untreated control counterparts. UV-treated long abutments showed a 4.6-fold increase in maximum tensile load and 54-fold increase in bonding energy. UV treatment rendered the titanium surface superhydrophilic and low in carbon, whereas untreated specimens remained carbon-rich and hydrophobic. UV-treated long abutments exhibited 3.1-fold higher energy than UV-treated standard abutments. Notably, long abutments without UV treatment did not outperform standard untreated abutments. SEM and EDX confirmed extensive residual cement on UV-treated abutments, indicating cohesive failure and strong interfacial bonding.</p><p><strong>Conclusions: </strong>A 1-min UV photofunctionalization transforms titanium into a superhydrophilic, high-energy surface that significantly enhances cement bonding. This physicochemical surface strategy outperforms geometric modifications alone. As a rapid, non-invasive approach, UV photofunctionalization may establish a new standard for durable implant-supported restorations, reducing prosthetic failure and influencing both material selection and clinical and laboratory workflows.</p>","PeriodicalId":16887,"journal":{"name":"Journal of prosthodontic research","volume":" ","pages":"383-397"},"PeriodicalIF":3.8,"publicationDate":"2026-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145185861","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":"Development of a device for continuous salivary pH measurement at two locations in the oral cavity.","authors":"Thida Aung, Hiroshi Churei, Kairi Hayashi, Kazuyoshi Tsuchiya, Kazuma Sasaki, Gen Tanabe, Toshiaki Ueno, Kenji Fueki","doi":"10.2186/jpr.JPR_D_25_00145","DOIUrl":"10.2186/jpr.JPR_D_25_00145","url":null,"abstract":"<p><strong>Purpose: </strong>Conventional handheld pH meters have measurement limitations. Therefore, this study aimed to continuously measure the salivary pH at two intraoral locations using a newly developed sensor system.</p><p><strong>Methods: </strong>In this pilot study, we developed custom-made intraoral mouthguards (MG) with two pH sensors in the anterior region (Channel 1: Ch1) and the buccal side of the maxillary molar (Channel 2: Ch2) to continuously monitor salivary pH at two different locations in the oral cavity.</p><p><strong>Results: </strong>The coefficient of determination (R²) for all MG sensor measurements was ≥0.99, with a high level of accuracy. Both sensor channels exhibited similar mean pH values for standard solutions, with small and constant variations. However, notable unstable differences in intraoral measurements were observed during rehydration owing to positional differences. Nonetheless, the MG sensors demonstrated excellent reliability with consistently high Intraclass Correlation Coefficients ranging from 0.977 to 0.999.</p><p><strong>Conclusions: </strong>This pilot study provides valuable insights into salivary pH fluctuations, particularly during exercise, through continuous measurements using a sensor system for the simultaneous acquisition of real-time data from different anatomical sites. These results emphasize the potential of developing an intraoral sensor system that can detect subtle variations in salivary pH.</p>","PeriodicalId":16887,"journal":{"name":"Journal of prosthodontic research","volume":" ","pages":"414-423"},"PeriodicalIF":3.8,"publicationDate":"2026-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145900759","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}