Journal of prosthodontic research最新文献

{"title":"Additive manufacturing of dental ceramics in prosthodontics: The status quo and the future.","authors":"Han Zhu, Jimin Jiang, Yujie Wang, Sijie Wang, Yong He, Fuming He","doi":"10.2186/jpr.JPR_D_23_00119","DOIUrl":"10.2186/jpr.JPR_D_23_00119","url":null,"abstract":"<p><strong>Purpose: </strong>This review aims to summarize the available technologies, material categories, and prosthodontic applications of additive manufacturing (AM) dental ceramics, evaluate the achievable accuracy and mechanical properties in comparison with current mainstream computer-aided design/computer-aided manufacturing (CAD/CAM) subtractive manufacturing (SM) methods, and discuss future prospects and directions.</p><p><strong>Study selection: </strong>This paper is based on the latest reviews, state-of-the-art research, and existing ISO standards on AM technologies and prosthodontic applications of dental ceramics. PubMed, Web of Science, and ScienceDirect were amongst the sources searched for narrative reviews.</p><p><strong>Results: </strong>Relatively few AM technologies are available and their applications are limited to crowns and fixed partial dentures. Although the accuracy and strength of AM dental ceramics are comparable to those of SM, they have the limitations of relatively inferior curved surface accuracy and low strength reliability. Furthermore, functionally graded additive manufacturing (FGAM), a potential direction for AM, enables the realization of biomimetic structures, such as natural teeth; however, specific studies are currently lacking.</p><p><strong>Conclusions: </strong>AM dental ceramics are not sufficiently developed for large-scale clinical applications. However, with additional research, it may be possible for AM to replace SM as the mainstream manufacturing technology for ceramic restorations.</p>","PeriodicalId":16887,"journal":{"name":"Journal of prosthodontic research","volume":" ","pages":"380-399"},"PeriodicalIF":3.2,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139723076","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exploring the relationship between oral health and multiple health conditions: An outcome-wide approach.","authors":"Shiho Kino, Yudai Tamada, Kenji Takeuchi, Atsushi Nakagomi, Koichiro Shiba, Taro Kusama, Takafumi Yamamoto, Jun Aida","doi":"10.2186/jpr.JPR_D_23_00091","DOIUrl":"10.2186/jpr.JPR_D_23_00091","url":null,"abstract":"<p><strong>Purpose: </strong>A growing body of evidence suggests that oral health is associated with a wide range of health outcomes; however, opinions tend to vary because of inconsistent findings. This study aimed to simultaneously examine the association between oral health status and multiple health and well-being indicators using outcome-wide epidemiology.</p><p><strong>Methods: </strong>Data were obtained from the Japan Gerontological Evaluation Study. Oral health status was categorized as: ≥20 teeth, 10-19 teeth with dental prosthesis, 0-9 teeth with prosthesis, 10-19 teeth without prosthesis, and 0-9 teeth without prosthesis. We examined the associations between oral health status in 2013 and 35 health and well-being outcomes in 2019, including physical/cognitive health, psychological distress, subjective health, social well-being, prosocial/altruistic behaviors, and health behaviors, using two databases (n=32,827 and 15,905).</p><p><strong>Results: </strong>Compared to individuals with ≥20 teeth, those with <20 teeth had a 10-33% higher risk of mortality and a 6-14% higher risk of functional disability six years later. Additionally, individuals with fewer than 20 teeth tended to go out less frequently and eat fewer vegetables and fruits. Furthermore, individuals with 0-9 teeth without a prosthesis were more likely to have severe functional disability (risk ratio (RR):1.17, 95% confidence interval (CI):1.05-1.31), engage in fewer intellectual activities (standardized difference: 0.17, 95% CI: 0.10-0.24), and feel more hopeless (RR: 1.21, 95% CI: 1.04-1.41).</p><p><strong>Conclusions: </strong>The prevention of tooth loss and prosthodontic treatment may be associated with reduced mortality and functional disability, as well as maintenance of intellectual ability, frequency of going out, and improvements in dietary lifestyle.</p>","PeriodicalId":16887,"journal":{"name":"Journal of prosthodontic research","volume":" ","pages":"415-424"},"PeriodicalIF":3.2,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9992685","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":"Developing tongue coating status assessment using image recognition with deep learning.","authors":"Jumpei Okawa, Kazuhiro Hori, Hiromi Izuno, Masayo Fukuda, Takako Ujihashi, Shohei Kodama, Tasuku Yoshimoto, Rikako Sato, Takahiro Ono","doi":"10.2186/jpr.JPR_D_23_00117","DOIUrl":"10.2186/jpr.JPR_D_23_00117","url":null,"abstract":"<p><strong>Purpose: </strong>To build an image recognition network to evaluate tongue coating status.</p><p><strong>Methods: </strong>Two image recognition networks were built: one for tongue detection and another for tongue coating classification. Digital tongue photographs were used to develop both networks; images from 251 (178 women, 74.7±6.6 years) and 144 older adults (83 women, 73.8±7.3 years) who volunteered to participate were used for the tongue detection network and coating classification network, respectively. The learning objective of the tongue detection network is to extract a rectangular region that includes the tongue. You-Only-Look-Once (YOLO) v2 was used as the detection network, and transfer learning was performed using ResNet-50. The accuracy was evaluated by calculating the intersection over the union. For tongue coating classification, the rectangular area including the tongue was divided into a grid of 7×7. Five experienced panelists scored the tongue coating in each area using one of five grades, and the tongue coating index (TCI) was calculated. Transfer learning for tongue coating grades was performed using ResNet-18, and the TCI was calculated. Agreement between the panelists and network for the tongue coating grades in each area and TCI was evaluated using the kappa coefficient and intraclass correlation, respectively.</p><p><strong>Results: </strong>The tongue detection network recognized the tongue with a high intersection over union (0.885±0.081). The tongue coating classification network showed high agreement with tongue coating grades and TCI, with a kappa coefficient of 0.826 and an intraclass correlation coefficient of 0.807, respectively.</p><p><strong>Conclusions: </strong>Image recognition enables simple and detailed assessment of tongue coating status.</p>","PeriodicalId":16887,"journal":{"name":"Journal of prosthodontic research","volume":" ","pages":"425-431"},"PeriodicalIF":3.2,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41130546","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":"Machine learning model to predict the width of maxillary central incisor from anthropological measurements.","authors":"Remya Ampadi Ramachandran, Merve Koseoglu, Hatice Özdemir, Funda Bayindir, Cortino Sukotjo","doi":"10.2186/jpr.JPR_D_23_00114","DOIUrl":"10.2186/jpr.JPR_D_23_00114","url":null,"abstract":"<p><strong>Purpose: </strong>To improve smile esthetics, clinicians should comprehensively analyze the face and ensure that the sizes selected for the maxillary anterior teeth are compatible with the available anthropological measurements. The inter commissural (ICW), interalar (IAW), intermedial-canthus (MCW), interlateral-canthus (LCW), and interpupillary (IPW) widths are used to determine the width of maxillary central incisors (CW). The aim of this study was to develop an automated approach using machine learning (ML) algorithms to predict central incisor width in a young Turkish population using anthropological measurements. This automation can contribute to digital dentistry and clinical decision-making.</p><p><strong>Methods: </strong>In the initial phase of this cross-sectional study, several ML regression models-including multiple linear regression (MLR), multi-layer-perceptron (MLP), decision-tree (DT), and random forest (RF) models-were validated to confirm the central width prediction accuracy. Datasets containing only male and female measurements, as well as combined were considered for ML model implementation, and the performance of each model was evaluated for an unbiased population dataset.</p><p><strong>Results: </strong>Compared with the other algorithms, the RF algorithm showed improved performance for all cases, with an accuracy of 96%, which represents the percentage of correct predictions. The plot reveals the applicability of the RF model in predicting the CW from anthropological measurements irrespective of the candidate's sex.</p><p><strong>Conclusions: </strong>These results demonstrated the possibility of predicting central incisor widths based on anthropometric measurements using ML models. The accurate central incisor width prediction from these trials also indicates the applicability of the proposed model to be deployed for enhanced clinical decision-making.</p>","PeriodicalId":16887,"journal":{"name":"Journal of prosthodontic research","volume":" ","pages":"432-440"},"PeriodicalIF":3.2,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49678752","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":"Applications and performance of artificial intelligence models in removable prosthodontics: A literature review.","authors":"Islam E Ali, Chihiro Tanikawa, Manabu Chikai, Shuichi Ino, Yuka Sumita, Noriyuki Wakabayashi","doi":"10.2186/jpr.JPR_D_23_00073","DOIUrl":"10.2186/jpr.JPR_D_23_00073","url":null,"abstract":"<p><strong>Purpose: </strong>In this narrative review, we present the current applications and performances of artificial intelligence (AI) models in different phases of the removable prosthodontic workflow and related research topics.</p><p><strong>Study selection: </strong>A literature search was conducted using PubMed, Scopus, Web of Science, and Google Scholar databases between January 2010 and January 2023. Search terms related to AI were combined with terms related to removable prosthodontics. Articles reporting the structure and performance of the developed AI model were selected for this literature review.</p><p><strong>Results: </strong>A total of 15 articles were relevant to the application of AI in removable prosthodontics, including maxillofacial prosthetics. These applications included the design of removable partial dentures, classification of partially edentulous arches, functional evaluation and outcome prediction in complete denture treatment, early prosthetic management of patients with cleft lip and palate, coloration of maxillofacial prostheses, and prediction of the material properties of denture teeth. Various AI models with reliable prediction accuracy have been developed using supervised learning.</p><p><strong>Conclusions: </strong>The current applications of AI in removable prosthodontics exhibit significant potential for improving the prosthodontic workflow, with high accuracy levels reported in most of the reviewed studies. However, the focus has been predominantly on the diagnostic phase, with few studies addressing treatment planning and implementation. Because the number of AI-related studies in removable prosthodontics is limited, more models targeting different prosthodontic disciplines are required.</p>","PeriodicalId":16887,"journal":{"name":"Journal of prosthodontic research","volume":" ","pages":"358-367"},"PeriodicalIF":3.2,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41133975","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":"A new proposal for the workflow using CAD/CAM technology for fabrication of resin-based removable partial dentures.","authors":"Akinori Tasaka, Ryota Mori, Takeshi Hirabayashi, Sato Kogawa, Kosei Ito, Juro Wadachi, Shuichiro Yamashita","doi":"10.2186/jpr.JPR_D_23_00153","DOIUrl":"10.2186/jpr.JPR_D_23_00153","url":null,"abstract":"","PeriodicalId":16887,"journal":{"name":"Journal of prosthodontic research","volume":" ","pages":"355-357"},"PeriodicalIF":3.2,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49678750","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":"Freehand vs. depth-gauge rotary instruments for veneer preparation: A controlled randomized simulator study.","authors":"M Oliver Ahlers, Georg Cachovan, Holger A Jakstat, Daniel Edelhoff, Jakob C Roehl, Ursula Platzer","doi":"10.2186/jpr.JPR_D_22_00317","DOIUrl":"10.2186/jpr.JPR_D_22_00317","url":null,"abstract":"<p><strong>Purpose: </strong>To investigate whether depth-gauge burs in veneer preparations influence preparation depth in a randomized, controlled, single-blinded trial and whether inexperienced operators can perform adequate veneer preparations.</p><p><strong>Methods: </strong>Participants were 20 undergraduate dental students with no prior veneer preparation experience. The instruments used were the \"Laminate Veneer System\" (LVS), \"Keramik-Veneers. de\" (KVD), and a \"Freehand\" group (FH) for reference. All participants prepared three educational acrylic resin maxillae and three mandibular central incisors mounted in typodonts in patient simulators. The objectives were to achieve a preparation depth of 0.6 mm (tooth 11) and 0.4 mm (tooth 31). The sequences of the instruments used and prepared teeth were randomized. The measurements were performed using a laser triangulation coordinate-measuring machine. The data were stratified according to tooth location.</p><p><strong>Results: </strong>The preparation depths of both depth-gauge-instrument-groups LVS and KVD achieved the objectives significantly better than did the instruments from the \"Freehand\" group (P < 0.001). The differences between the depth gauge groups were insignificant, although the maximum preparation depths were smaller in the KVD group. Regarding the prepared teeth, the preparation depths in the mandibular incisors were lower, and the differences were smaller.</p><p><strong>Conclusions: </strong>The use of special depth-gauge burs for initial veneer preparation leads to significantly lower preparation depths than \"Freehand\" preparations. The tapered instruments resulted in a lower incidence of extreme preparation depths. The inexperienced operators performed veneer preparation remarkably well.</p>","PeriodicalId":16887,"journal":{"name":"Journal of prosthodontic research","volume":" ","pages":"407-414"},"PeriodicalIF":3.2,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49678751","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 the number of teeth, occlusal force, occlusal contact area, and dietary hardness in older Japanese adults: The SONIC study.","authors":"Tomoaki Mameno, Yoshitaka Tsujioka, Motoyoshi Fukutake, Yuki Murotani, Toshihito Takahashi, Kodai Hatta, Yasuyuki Gondo, Kei Kamide, Tatsuro Ishizaki, Yukie Masui, Yusuke Mihara, Yuichi Nishimura, Hiromasa Hagino, Kotaro Higashi, Suzuna Akema, Yoshinobu Maeda, Mai Kabayama, Hiroshi Akasaka, Hiromi Rakugi, Ken Sugimoto, Hitomi Okubo, Satoshi Sasaki, Kazunori Ikebe","doi":"10.2186/jpr.JPR_D_23_00050","DOIUrl":"10.2186/jpr.JPR_D_23_00050","url":null,"abstract":"<p><strong>Purpose: </strong>Individuals with impaired masticatory function tend to prefer soft foods, which results in decreased masticatory muscle activity. This study examined the association between the oral condition (number of teeth, occlusal force, and occlusal contact area) and dietary hardness using a daily dietary questionnaire.</p><p><strong>Methods: </strong>This cross-sectional study evaluated 1841 participants aged 69-71 and 79-81 years. Registered dentists examined the number of teeth, occlusal force, and occlusal contact area. Dietary hardness was defined as the estimated masticatory muscle activity required for a habitual diet. Habitual diet during the preceding month was assessed using a brief self-administered diet history questionnaire. Confounding factors, such as age, sex, socioeconomic status, smoking habits, history of chronic diseases (hypertension, hyperlipidemia, and diabetes), and cognitive function were also evaluated. Multivariate linear regression analyses were performed to assess the association between dietary hardness and each oral condition.</p><p><strong>Results: </strong>Occlusal force (standardized regression coefficients [β]=0.08, P < 0.01) and occlusal contact area (β=0.06, P < 0.01) were significantly associated with dietary hardness after adjusting for the confounding factors. Number of teeth was not significantly associated with dietary hardness. In addition, the associations between dietary hardness, sex, and a history of diabetes were stronger than those between dietary hardness and oral factors.</p><p><strong>Conclusions: </strong>Occlusal force and contact area were significantly associated with dietary hardness as estimated from the masticatory muscle activity using a daily diet questionnaire.</p>","PeriodicalId":16887,"journal":{"name":"Journal of prosthodontic research","volume":" ","pages":"400-406"},"PeriodicalIF":3.2,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10494627","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 effects of collagen cross-link deficiency on osseointegration process of pure titanium implants.","authors":"Mubarak Suliman, Masako Nagasawa, Farah A Al-Omari, Katsumi Uoshima","doi":"10.2186/jpr.JPR_D_22_00249","DOIUrl":"10.2186/jpr.JPR_D_22_00249","url":null,"abstract":"<p><strong>Purpose: </strong>This study aimed to investigate the effect of collagen cross-link deficiency on collagen fiber formation around an implant and its effect on the osseointegration process.</p><p><strong>Methods: </strong>Wistar rats were fed 0.1% beta-aminopropionitrile (BAPN) dissolved in water to induce collagen cross-link deficiency. Custom-made mini-implants with machined surfaces were placed proximal to the tibia. At 1, 2, and 4 weeks postoperatively, the bone area around the implant, bone-implant contact ratio, osteoclast/osteocyte activity, and osseointegration strength were evaluated using histological and immunohistochemical analyses and biomechanical tests.</p><p><strong>Results: </strong>Long-term disturbance of collagen cross-link formation in the BAPN group resulted in faster collagen fiber maturation than that in controls, with a defective collagen structure, low bone formation quantity, and low bone-implant contact values. Deficiency of collagen cross-links resulted in increased bone resorption and decreased osteocyte activity.</p><p><strong>Conclusions: </strong>Collagen cross-linking is important for the formation of the collagen matrix, and their deficiency may impair bone activity around implants, affecting the osseointegration process.</p>","PeriodicalId":16887,"journal":{"name":"Journal of prosthodontic research","volume":" ","pages":"449-455"},"PeriodicalIF":3.2,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41133964","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":"Reduced number of teeth with and without dental prostheses and low frequency of laughter in older adults: Mediation by poor oral function.","authors":"Yudai Tamada, Kenji Takeuchi, Taro Kusama, Masashige Saito, Tetsuya Ohira, Kokoro Shirai, Chikae Yamaguchi, Katsunori Kondo, Jun Aida, Ken Osaka","doi":"10.2186/jpr.JPR_D_23_00071","DOIUrl":"10.2186/jpr.JPR_D_23_00071","url":null,"abstract":"<p><strong>Purpose: </strong>Laughter is expected to have health-protective effects, but the potential link between tooth loss and laughter remains unclear. Therefore, this study aimed to examine the association between tooth loss and a low frequency of laughter among older adults in Japan, to elucidate whether this association could be mitigated by dental prostheses, and to evaluate the magnitude of the association mediated by poor oral function.</p><p><strong>Methods: </strong>We used cross-sectional data from 157,708 functionally independent participants aged ≥65 years (46.3% male) from the Japan Gerontological Evaluation Study. A modified Poisson regression model was applied to examine the association between the number of remaining teeth (≥20/10-19/0-9), dental prostheses use, and infrequent laughter (i.e., laughing never or almost never). Causal mediation analysis was performed to assess whether the association was mediated by difficulties in eating hard foods, choking, or dry mouth.</p><p><strong>Results: </strong>Among the participants, 9,129 reported infrequent laughter. Participants with ≤9 and 10-19 teeth who did not use dental prostheses had a 1.29 and 1.14 times higher likelihood of infrequent laughter than those with ≥20 teeth, respectively. Furthermore, difficulty eating hard foods, choking, and dry mouth mediated 22.8%, 0.4%, and 4.3% of the association between fewer remaining teeth and infrequent laughter, respectively. Meanwhile, we did not find evidence for the differences in infrequent laughter between participants with ≤19 teeth using dental prostheses and those with ≥20 teeth.</p><p><strong>Conclusions: </strong>Tooth loss among individuals without dental prostheses was associated with infrequent laughter, and this association was mediated by poor oral function.</p>","PeriodicalId":16887,"journal":{"name":"Journal of prosthodontic research","volume":" ","pages":"441-448"},"PeriodicalIF":3.2,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41162071","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}