Journal of prosthodontic research最新文献

Flexural strength of translucent zirconia for single crowns and fixed dental prostheses-A systematic review. 半透明氧化锆单冠和固定义齿抗折强度的系统评价。

IF 3.4 2区医学

Journal of prosthodontic research Pub Date : 2025-07-30 DOI: 10.2186/jpr.JPR_D_24_00277

Selina A Bernauer, Nicola M Lirgg, Alexis Ioannidis, Nicola U Zitzmann, Nadja Rohr

{"title":"Flexural strength of translucent zirconia for single crowns and fixed dental prostheses-A systematic review.","authors":"Selina A Bernauer, Nicola M Lirgg, Alexis Ioannidis, Nicola U Zitzmann, Nadja Rohr","doi":"10.2186/jpr.JPR_D_24_00277","DOIUrl":"https://doi.org/10.2186/jpr.JPR_D_24_00277","url":null,"abstract":"Purpose: The aim of this systematic review was to analyze the reported flexural strength values of commercially available translucent zirconia materials. Additionally, data were evaluated to assess the impact of different specimen preparations and test methods.Study selection: This systematic review was conducted according to the PRISMA guidelines. Electronic searches were performed to identify in vitro studies published between January 1, 2013, and March 15, 2025, that reported flexural strength values of translucent zirconia and included the names of the tested materials and manufacturers. Flexural strength values were analyzed to assess the effects of yttria content, specimen processing, surface treatments, and test methods using Kruskal-Wallis analysis of variance (α = 0.05) and forest plots.Results: A total of 78 laboratory studies met the inclusion criteria. The overall flexural strength values were significantly higher for 4Y-PSZ (803± 233 MPa) than for 5Y-PSZ materials (570 ± 116 MPa) (P = 0.005). Specimen processing, surface treatments, and test methods significantly affected the flexural strength values for 5Y-PSZ (P < 0.001) but not for 4Y-PSZ (P > 0.05).Conclusions: This systematic review highlights the challenges in comparing the flexural strength values of translucent zirconia owing to differences in processing parameters. Further standardization of test methods and adherence to ISO 6872 would improve comparability. Our findings support the clinical use of 4Y-PSZ for three-unit fixed dental prostheses (FDPs) and 5Y-PSZ for three-unit FDPs in the anterior region based on ISO 6872.","PeriodicalId":16887,"journal":{"name":"Journal of prosthodontic research","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144753671","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

Short- and long-term effects of mandibular advancement device therapy for obstructive sleep apnea on temporomandibular disorders: A systematic review and meta-analysis. 下颌推进装置治疗阻塞性睡眠呼吸暂停对颞下颌疾病的短期和长期影响：系统回顾和荟萃分析。

IF 3.2 2区医学

Journal of prosthodontic research Pub Date : 2025-07-24 DOI: 10.2186/jpr.JPR_D_25_00034

Shaoyuan Liu, Hiroyuki Ishiyama, Suvichaya Angkulmahasuk, Akira Nishiyama, Kenji Fueki

{"title":"Short- and long-term effects of mandibular advancement device therapy for obstructive sleep apnea on temporomandibular disorders: A systematic review and meta-analysis.","authors":"Shaoyuan Liu, Hiroyuki Ishiyama, Suvichaya Angkulmahasuk, Akira Nishiyama, Kenji Fueki","doi":"10.2186/jpr.JPR_D_25_00034","DOIUrl":"https://doi.org/10.2186/jpr.JPR_D_25_00034","url":null,"abstract":"Purpose: This systematic review and meta-analysis investigated the effects of mandibular advancement device (MAD) therapy on temporomandibular disorders (TMDs) in patients with obstructive sleep apnea (OSA).Study selection: We included 14 clinical studies assessing the signs and symptoms of TMDs in patients with OSA treated with MAD therapy. The analysis was divided into short-term (<6 months) and long-term (≥1 year) follow-up phases. Odds ratios (OR) and 95% confidence intervals (CI) were calculated for each study during follow-up. The certainty of the evidence was assessed using the Grading of Recommendations, Assessment, Development, and Evaluation (GRADE) methodology, and meta-analysis was conducted using Review Manager version 5.4.Results: Across the 14 studies included, the average follow-up period was 18.4 months, and the overall certainty of the evidence was rated as very low. Four studies used the Research Diagnostic Criteria for Temporomandibular Disorders (RDC/TMD), six used the Helkimo Anamnestic Index, and four employed questionnaires. In short-term follow-up, a significant increase in pain-related TMDs was observed, including pain in the temporomandibular joint (TMJ) or masticatory muscles (pain-related TMDs: OR:4.49; 95%CI: 1.46 to 13.81, TMJ or masticatory muscles pain: OR:2.90; 95%CI: 1.26 to 6.71). Conversely, during long-term follow-up, the odds of pain in the TMJ or masticatory muscles were significantly reduced (OR:0.21; 95%CI, 0.05 0.89)Conclusions: MAD therapy for OSA did not cause long-term adverse effects on the TMJ or masticatory muscles. However, its short-term use may result in pain-related TMDs, highlighting the need to monitor and manage these symptoms during this period.","PeriodicalId":16887,"journal":{"name":"Journal of prosthodontic research","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144707851","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

Accuracy of digitizing elastomeric impression materials using a dental laboratory scanner. 使用牙科实验室扫描仪数字化弹性体印模材料的准确性。

IF 3.2 2区医学

Journal of prosthodontic research Pub Date : 2025-07-24 DOI: 10.2186/jpr.JPR_D_24_00146

Jiyun Park, Takuya Kihara, Tomoko Ikawa, Yuko Shigeta, Mitsuhiko Ito, Shuji Shigemoto, Takumi Ogawa

{"title":"Accuracy of digitizing elastomeric impression materials using a dental laboratory scanner.","authors":"Jiyun Park, Takuya Kihara, Tomoko Ikawa, Yuko Shigeta, Mitsuhiko Ito, Shuji Shigemoto, Takumi Ogawa","doi":"10.2186/jpr.JPR_D_24_00146","DOIUrl":"https://doi.org/10.2186/jpr.JPR_D_24_00146","url":null,"abstract":"Purpose: This study compared the scanned data obtained from four conventional silicone impressions using a laboratory scanner to investigate the effects of impression materials on accuracy and precision.Methods: The master model was a gauge with four small height increments constructed from an assembly of ceramic gauge blocks. Impressions of the master model were made using four silicone impression materials (Imprinsis Regular: blue; Fusion II: pink; Fit Checker: white, Imprint3: yellow). The impressions were scanned under blue light using a laboratory scanner. The points of inquiry were 1) advisability of three-dimensional (3D) reconstruction, 2) reproducibility at the surface level, and 3) microstep detectability. Data were analyzed using a one-way analysis of variance and Tukey's multiple comparison test.Results: 3D reconstruction was achieved for all impressions except Imprint3. The scanning performance of the impression material affected the spectral reflection factor. There was no significant difference in surface reproducibility among the three impression materials, and the detectability of small step height in Imprinsis Regular was significantly better than that in other impression materials (P < 0.05).Conclusions: The color of the impression material affected digitization when a blue-light scanner was used. The digitization accuracy of Imprinsis Regular was higher than that of the other impression materials. However, the digitization accuracy of the three impression materials that could be 3D-reconstructed was within clinical tolerance. These findings can broaden the clinical applications of digital dentistry and mitigate the errors associated with dental materials.","PeriodicalId":16887,"journal":{"name":"Journal of prosthodontic research","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144707850","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

Evaluation of sleep bruxism by three-dimensional analysis of the deformation of acrylic resin occlusal appliances. 丙烯酸树脂咬合器三维变形分析评价睡眠磨牙症。

IF 3.2 2区医学

Journal of prosthodontic research Pub Date : 2025-07-10 DOI: 10.2186/jpr.JPR_D_24_00315

Aya Ozawa, Yoshitaka Suzuki, Kazuo Okura, Toyoko Tajima, Tatsuya Taniwaki, Akari Shibagaki, Fabillar Jaime Jr Moreno, Toshinori Okawa, Susumu Abe, Shuji Shigemoto, Yoshizo Matsuka

{"title":"Evaluation of sleep bruxism by three-dimensional analysis of the deformation of acrylic resin occlusal appliances.","authors":"Aya Ozawa, Yoshitaka Suzuki, Kazuo Okura, Toyoko Tajima, Tatsuya Taniwaki, Akari Shibagaki, Fabillar Jaime Jr Moreno, Toshinori Okawa, Susumu Abe, Shuji Shigemoto, Yoshizo Matsuka","doi":"10.2186/jpr.JPR_D_24_00315","DOIUrl":"https://doi.org/10.2186/jpr.JPR_D_24_00315","url":null,"abstract":"Purpose: To establish the relationship between rhythmic masticatory muscle activity (RMMA) of the masseter muscle during sleep bruxism (SB) and occlusal wear and distortion in the stabilization occlusal appliance (OcA) used for its treatment.Methods: Seventeen adults with SB wore OcAs composed of polymethyl methacrylate for 28 days. Weekly recordings included electromyography (EMG) of the masseter muscle using a wearable EMG device, evaluation of SB variables, and 3D scanning of the OcA using a 3D dental model scanner. The awake bite force at the time of recruitment was measured using a film-based bite force measurement system. The 3D data collected weekly before and after wearing the OcA were superimposed, and the weekly deformations in the coronal-apical directions were calculated. The masseter muscle activity per hour (RMMA index) and OcA deformation were compared weekly. Finally, we investigated the relationship between the frequency and intensity of the masseter muscle activity patterns and OcA deformation.Results: No significant differences were observed in weekly RMMA index; however, all OcA deformations were significant. Apical deformation, including occlusal wear, was positively correlated with awake bite force. Coronal deformation reflecting distortion was positively correlated with the number of sustained tonic masseter muscle activities and maximum masseter muscle activities.Conclusions: OcA deformation measured using this system reflects the frequency and intensity of the RMMA and masseter muscle activity in patients with SB, suggesting its potential as a novel clinical diagnostic tool for SB.","PeriodicalId":16887,"journal":{"name":"Journal of prosthodontic research","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144600840","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

The influences of different aging processes on color stability of amine-free light-cured resin luting agents. 不同老化工艺对无胺光固化树脂着色剂颜色稳定性的影响。

IF 3.2 2区医学

Journal of prosthodontic research Pub Date : 2025-07-10 DOI: 10.2186/jpr.JPR_D_24_00265

Yu Toida, Md Refat Readul Islam, Buer Qi, Shuhei Hoshika, Hidehiko Sano, Atsushi Tomokiyo

{"title":"The influences of different aging processes on color stability of amine-free light-cured resin luting agents.","authors":"Yu Toida, Md Refat Readul Islam, Buer Qi, Shuhei Hoshika, Hidehiko Sano, Atsushi Tomokiyo","doi":"10.2186/jpr.JPR_D_24_00265","DOIUrl":"https://doi.org/10.2186/jpr.JPR_D_24_00265","url":null,"abstract":"Purpose: To evaluate the color stability of light-cured resin luting agents after artificial aging using an amine-free initiator system.Methods: Five groups, each with eight samples, were produced. Specimens were divided as follows: two light-cured resin luting agents (PANAVIA Veneer LC; PVL [experimental group] and Variolink Esthetic LC; VEL [control group]), one dual-cured resin luting agent (PANAVIA V5; PV5 [control group]), and one composite resin (ESTELITE Σ QUICK; ESQ [control group]). The samples were divided into five groups subjected to different accelerated aging conditions: Condition 1 (air storage), Condition 2 (water storage), Condition 3 (temperature-moisture combination: as a control for Condition 2), Condition 4 (ultraviolet (UV) aging: to predict the performance in a laminate veneer restoration margin area), and Condition 5 (without UV aging to serve as a baseline control by eliminating environmental factors). Spectrophotometric measurements were performed. Changes in the color (∆E00) and a transparency parameter (ΔTP00) were determined. Data were analyzed using one- and two-way ANOVAs at a significance level of 5%.Results: PANAVIA V5 in water storage exhibited the highest ΔE00 across all materials, except Variolink Esthetic LC (P < 0.001). PANAVIA Veneer LC under Condition 1 did not show a statistically significant difference in ΔE00 compared to the other materials (P = 1.000). PANAVIA Veneer LC and ESQ showed significantly smaller ΔTP00 values than the other materials (P < 0.001).Conclusions: Based on the results of this study, PANAVIA Veneer LC shows better color stability, even under artificial aging conditions, which is clinically desirable.","PeriodicalId":16887,"journal":{"name":"Journal of prosthodontic research","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144600841","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

Predicting enamel depth distribution of maxillary teeth based on intraoral scanning: A machine learning study. 基于口腔内扫描预测上颌牙釉质深度分布的机器学习研究。

IF 3.2 2区医学

Journal of prosthodontic research Pub Date : 2025-06-24 DOI: 10.2186/jpr.JPR_D_24_00250

Du Chen, Xiang He, Qijing Li, Zhenyu Wang, Junfei Shen, Jiefei Shen

{"title":"Predicting enamel depth distribution of maxillary teeth based on intraoral scanning: A machine learning study.","authors":"Du Chen, Xiang He, Qijing Li, Zhenyu Wang, Junfei Shen, Jiefei Shen","doi":"10.2186/jpr.JPR_D_24_00250","DOIUrl":"https://doi.org/10.2186/jpr.JPR_D_24_00250","url":null,"abstract":"Purpose: Measuring enamel depth distribution (EDD) is of great importance for preoperative design of tooth preparations, restorative aesthetic preview and monitoring enamel wear. But, currently there are no non-invasive methods available to efficiently obtain EDD. This study aimed to develop a machine learning (ML) framework to achieve noninvasive and radiation-free EDD predictions with intraoral scanning (IOS) images.Methods: Cone-beam computed tomography (CBCT) and IOS images of right maxillary central incisors, canines, and first premolars from 200 volunteers were included and preprocessed with surface parameterization. During the training stage, the EDD ground truths were obtained from CBCT. Five-dimensional features (incisal-gingival position, mesial-distal position, local surface curvature, incisal-gingival stretch, mesial-distal stretch) were extracted on labial enamel surfaces and served as inputs to the ML models. An eXtreme gradient boosting (XGB) model was trained to establish the mapping of features to the enamel depth values. R2 and mean absolute error (MAE) were utilized to evaluate the training accuracy of XGB model. In prediction stage, the predicted EDDs were compared with the ground truths, and the EDD discrepancies were analyzed using a paired t-test and Frobenius norm.Results: The XGB model achieved superior performance in training with average R2 and MAE values of 0.926 and 0.080, respectively. Independent validation confirmed its robust EDD prediction ability, showing no significant deviation from ground truths in paired t-test and low prediction errors (Frobenius norm: 12.566-18.312), despite minor noise in IOS-based predictions.Conclusions: This study performed preliminary validation of an IOS-based ML model for high-quality EDD prediction.","PeriodicalId":16887,"journal":{"name":"Journal of prosthodontic research","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144505969","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

Removable partial denture, complete denture, and fixed partial denture use and health-related quality of life among older adults with tooth loss: A JAGES cross-sectional study. 可摘局部义齿、全口义齿和固定局部义齿的使用与牙齿脱落的老年人健康相关生活质量：一项JAGES横断面研究

IF 3.2 2区医学

Journal of prosthodontic research Pub Date : 2025-06-24 DOI: 10.2186/jpr.JPR_D_24_00286

Manami Hoshi-Harada, Kenji Takeuchi, Taro Kusama, Jun Aida, Hiroshi Egusa, Ken Osaka

{"title":"Removable partial denture, complete denture, and fixed partial denture use and health-related quality of life among older adults with tooth loss: A JAGES cross-sectional study.","authors":"Manami Hoshi-Harada, Kenji Takeuchi, Taro Kusama, Jun Aida, Hiroshi Egusa, Ken Osaka","doi":"10.2186/jpr.JPR_D_24_00286","DOIUrl":"https://doi.org/10.2186/jpr.JPR_D_24_00286","url":null,"abstract":"Purpose: To investigate the association of removable partial denture (RPD)/complete denture (CD) and fixed partial denture (FPD) use with health-related quality of life (HRQoL), evaluated using the EuroQol 5-dimension, 5-level instrument (EQ-5D-5L) among older adults with tooth loss.Methods: Cross-sectional data from the 2022 Japan Gerontological Evaluation Study. Participants were classified as RPD/CD users, FPD users, or nonusers. Generalized linear regression models stratified by the number of teeth were used to explore the association of RPD/CD and FPD use with the HRQoL evaluated using the EQ-5D-5L. The interactions among the number of teeth, RPD/CD, and FPD use were examined.Results: After adjusting for all covariates, RPD/CD and FPD users with 5-19 teeth had higher predicted HRQoL utility scores than nonusers (RPD/CD [n=14,297]: 0.837 vs. 0.850; FPD [n=7,476]: 0.858 vs. 0.861 [nonusers vs. users]). The interaction between number of teeth and RPD/CD and FPD use revealed that differences in HRQoL between users and nonusers were greater among those with 1-14 teeth for RPD/CD use and among those with 10-14 teeth for FPD use (RPD/CD: β = -0.008, P < 0.01; FPD: β = -0.008, P = 0.183).Conclusions: RPD/CD and FPD users with 5-19 teeth had a higher HRQoL than nonusers, with differences appearing to depend on the number of teeth. The World Health Organization has promoted the incorporation of oral health into universal health coverage (UHC). Given the minimal HRQoL difference between CD users and nonusers among edentulous individuals, unconventional dentures may merit inclusion in UHC.","PeriodicalId":16887,"journal":{"name":"Journal of prosthodontic research","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144505970","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

Improvement in food comminution at swallowing threshold with newly fabricated removable dentures. 新制作的活动义齿改善吞咽阈下食物粉碎。

IF 3.2 2区医学

Journal of prosthodontic research Pub Date : 2025-06-24 DOI: 10.2186/jpr.JPR_D_24_00287

Pinta Marito, Kazuhiro Murakami, Monika Werdiningsih, Lindawati Kusdhany, Muslita Indrasari, Takahiro Ono, Kazuhiro Hori

{"title":"Improvement in food comminution at swallowing threshold with newly fabricated removable dentures.","authors":"Pinta Marito, Kazuhiro Murakami, Monika Werdiningsih, Lindawati Kusdhany, Muslita Indrasari, Takahiro Ono, Kazuhiro Hori","doi":"10.2186/jpr.JPR_D_24_00287","DOIUrl":"https://doi.org/10.2186/jpr.JPR_D_24_00287","url":null,"abstract":"Purpose: Comminution of food into small particles through mastication is important for safe swallowing. However, few studies have evaluated the functional improvement provided by newly fabricated removable dentures in terms of changes in the comminution of food at the swallowing threshold (CF-ST). This prospective cohort study aimed to clarify the changes in CF-ST associated with the fabrication of newly removable dentures.Methods: Eighty patients (age: 57.3 ± 11.9 years) requiring new removable dentures were enrolled. Masticatory performance (MP) and CF-ST were assessed before and after new denture insertion. MP and CF-ST were defined as the increase in surface area of 5.5 g of test gummy jelly after 30 chewing cycles and after chewing until the premeasured swallowing threshold, respectively. Other oral functions, including tongue pressure, oral diadochokinesis, and stimulated salivary flow rate, were measured concurrently. All evaluation items were compared before and after new denture insertion. Multiple regression analysis was performed to identify factors affecting changes in CF-ST.Results: CF-ST, MP, and other oral functions significantly improved after new denture insertion. Multiple regression analysis identified changes in MP (β = 0.467), number of chewing cycles at the swallowing threshold (β = 0.322), and belonging to Eichner index C group (β = 0.245) as significant factors influencing changes in CF-ST.Conclusions: Newly fabricated removable dentures have the potential to improve CF-ST. This improvement may result from enhanced masticatory function and changes in masticatory behavior, such as increased chewing.","PeriodicalId":16887,"journal":{"name":"Journal of prosthodontic research","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144505968","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

Associations between sleep bruxism, oral wetness, and salivary flow: A quantitative analysis. 睡眠磨牙、口腔湿润和唾液流动之间的关系：一项定量分析。

IF 3.2 2区医学

Journal of prosthodontic research Pub Date : 2025-06-11 DOI: 10.2186/jpr.JPR_D_24_00318

Mizuki Shinkai, Yoshitaka Suzuki, Aya Ozawa, Akari Shibagaki, Kazuo Okura, Yoshizo Matsuka

{"title":"Associations between sleep bruxism, oral wetness, and salivary flow: A quantitative analysis.","authors":"Mizuki Shinkai, Yoshitaka Suzuki, Aya Ozawa, Akari Shibagaki, Kazuo Okura, Yoshizo Matsuka","doi":"10.2186/jpr.JPR_D_24_00318","DOIUrl":"https://doi.org/10.2186/jpr.JPR_D_24_00318","url":null,"abstract":"Purpose: Jaw movements in sleep bruxism (SB) presumably play a functional role in salivary stimulation and oral tissue protection. This study aimed to investigate the relationships between SB, oral wetness, and salivary flow.Methods: Participants underwent polysomnography in a sleep laboratory, during which rhythmic masticatory muscle activity (RMMA) and swallowing were recorded. The degree of oral moisture was measured before sleep, during sleep, and upon waking. The unstimulated salivary flow rate (USFR) and stimulated salivary flow rate (SSFR) were measured before sleep and upon waking. Correlations between the RMMA index, degree of oral moisture, and salivary flow were examined.Results: Seventeen participants (10 males, 7 females, 28.2 ± 8.6 years old) were included. The degree of oral moisture and USFR were not significantly correlated with the RMMA index. The SSFR before sleep demonstrated a significant moderately negative correlation with the RMMA index (ρ = -0.637). The frequency of RMMA that occurred with swallowing per hour demonstrated a significant negative correlation with the SSFR before sleep and upon waking (ρ = -0.703, -0.527, respectively). Swallowing occurred significantly more frequently in the last one-third of the RMMA episodes, and the frequency of phasic and mixed types of RMMA that occurred with swallowing demonstrated a significant negative correlation with the SSFR before sleep (ρ = -0.583, -0.511, respectively).Conclusions: These results suggest a relationship between SB and the ability to secrete stimulated saliva. SB may have a functional role in stimulating saliva secretion, and an increase in SSFR may alleviate SB.","PeriodicalId":16887,"journal":{"name":"Journal of prosthodontic research","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144275183","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

A developmental approach to reassessing the constancy of hyoid bone position. 一种重新评估舌骨位置稳定性的发展方法。

IF 3.2 2区医学

Journal of prosthodontic research Pub Date : 2025-06-07 DOI: 10.2186/jpr.JPR_D_24_00317

Yuko Shigeta, Eriko Ando, Norihiro Sugimoto, Tomoko Ikawa, Takuya Kihara, Shuji Shigemoto, Takumi Ogawa

{"title":"A developmental approach to reassessing the constancy of hyoid bone position.","authors":"Yuko Shigeta, Eriko Ando, Norihiro Sugimoto, Tomoko Ikawa, Takuya Kihara, Shuji Shigemoto, Takumi Ogawa","doi":"10.2186/jpr.JPR_D_24_00317","DOIUrl":"https://doi.org/10.2186/jpr.JPR_D_24_00317","url":null,"abstract":"Purpose: The hyoid bone plays a key role in several physiological functions by interacting with the attached muscles. Understanding its kinematics and positional stability is essential for evaluating its functions: swallowing, mastication, intraoral transport, vocalization, and respiration. This study aimed to assess the position of the hyoid bone relative to the cranial base and mandible using cephalometric imaging and to examine its stability.Methods: Cephalometric images of 140 patients were analyzed using specialized software. The positional relationship between the cranial base and hyoid bone was assessed by measuring the Porion-Hyoid distance (Po-Hy) and the angle between the Po-Hy and the Nasion-Porion line (∠CB-Hy). The relationship between the mandible and the hyoid bone and the cervical angle was also evaluated.Results: The ∠CB-Hy showed a narrow distribution (mean ± SD: 89.2 ± 5.12°). A weak, but statistically significant, correlation was observed between age and the ∠CB-Hy. Additionally, a significant negative correlation was found between the number of missing molars and ∠CB-Hy, while a strong positive correlation was identified between the cervical angle and ∠CB-Hy. The relationship between the cervical angle and ∠CB-Hy was represented by the following linear regression equation: ∠CB-Hy = 0.484 × Cervical angle + 37.4.Conclusions: Our findings suggest that the hyoid bone maintains a relatively stable position with respect to the cranial base with only slight variation. However, a significant relationship exists between ∠CB-Hy and cervical inclination. Clinicians and researchers should consider this relationship when assessing the hyoid position in clinical and research settings.","PeriodicalId":16887,"journal":{"name":"Journal of prosthodontic research","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144248437","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}

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