BMC Oral Health最新文献

{"title":"Mandibular condyle detection using deep learning and double attractor-based energy valley optimizer algorithm.","authors":"Mohamed Abd Elaziz, Abdelghani Dahou, Mushira Dahaba, Dina Mohamed ElBeshlawy, Mohammed Azmi Al-Betar, Mohammed A Al-Qaness, Ahmed A Ewees, Arwa Mousa","doi":"10.1186/s12903-025-05725-9","DOIUrl":"10.1186/s12903-025-05725-9","url":null,"abstract":"<p><p>The temporomandibular joint (TMJ) constitutes a bilateral ginglymoarthrodial joint, wherein each condyle interacts with its corresponding glenoid fossa of the temporal bone. There is a critical need to understand better and accurately characterize the temporomandibular joint's diverse and variable morphological features, which can reveal significant variability across individuals, genders, and age groups. Within this study, we present an innovative condyle detection technique harnessing the potential of deep learning and feature selection (FS) models. Our approach encompasses a multi-stage process, commencing with using YOLOv8 to identify the region of interest (ROI). Subsequently, leveraging a sophisticated deep learning model, we extract salient features from the identified ROI. We modified the Energy Valley Optimizer (EVO) as an FS technique. To substantiate the efficacy of our developed method, a comprehensive dataset of 3000 panoramic images is employed, meticulously classified by two experienced maxillofacial Radiologists into four distinctive types: flat, pointed, angled, and round. The evaluation and comparison results confirm the efficiency of the proposed method in detecting condyle based on various evaluation performance indicators.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"25 1","pages":"932"},"PeriodicalIF":2.6,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12144833/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144246338","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":"Oral health knowledge, perceptions and attitudes of pregnant women in Sub-Saharan Africa: a systematic review.","authors":"Torojah Mayaline Williams, Adetola Emmanuel Babalola, Olubusayo Bolarinwa, Victor Adeyanju Somoye, Oluwaseun Akinola Azeez, Olayinka Julianah Onasanya, Victor Miracle Johnson, Adaeze Favour Egemonye","doi":"10.1186/s12903-025-06249-y","DOIUrl":"10.1186/s12903-025-06249-y","url":null,"abstract":"<p><strong>Background: </strong>This systematic review aimed to assess pregnant women's knowledge, perceptions, and attitudes toward oral health changes in sub-Saharan Africa (SSA) and examine their oral health-seeking behavior during pregnancy.</p><p><strong>Methods: </strong>A comprehensive search was conducted across PubMed, Google Scholar, African Journals Online (AJOL), the Directory of Open Access Journals (DOAJ), and the Cochrane Library. Both Medical Subject Headings (MeSH) and free-text terms related to oral health, knowledge, attitudes, perceptions, antenatal care, pregnancy, and Africa were used. Boolean operators (\"AND,\" \"NOT,\" and \"OR\") refined the search strategy. Two independent reviewers screened studies and extracted data using Rayyan software, with a third reviewer resolving conflicts. The Robins-E tool assessed the risk of bias.</p><p><strong>Results: </strong>Fifteen of seventy-five studies initially identified met the inclusion criteria after full-text screening. Most employed a cross-sectional design. Findings revealed low oral health-seeking behavior among pregnant women in Africa, attributed to factors such as negative dental experiences, concerns about harm to the unborn child, and the belief that dental care is unnecessary. Many women visited dental clinics only when they noticed significant oral health changes.</p><p><strong>Conclusions: </strong>The reviewed studies demonstrated a low risk of bias and consistent findings. Pregnancy is a critical period, and poor oral health can adversely affect birth outcomes. Insufficient knowledge and misconceptions deter women from seeking dental care during pregnancy. To address this, targeted oral health education must improve awareness and overcome barriers to seeking care.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"25 1","pages":"937"},"PeriodicalIF":2.6,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12144732/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144246340","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":"Association between clinical findings and 3T MRI features in temporomandibular joint disorders.","authors":"Şelale Özel, Selmi Tunç, Abdullah Utku Şenol","doi":"10.1186/s12903-025-06283-w","DOIUrl":"10.1186/s12903-025-06283-w","url":null,"abstract":"<p><strong>Background: </strong>Temporomandibular joint disorders (TMD) commonly cause restricted mouth opening and pain, significantly affecting patients' quality of life. This study aims to explore the relationship between common clinical symptoms-clicking and limited mouth opening-and MRI findings in patients diagnosed with TMD.</p><p><strong>Methods: </strong>A total of 46 patients, with either clicking sounds or limited mouth opening, were examined using a 3T MRI scanner. The study evaluated disc position, disc deformity, and signs of osteoarthrosis, comparing MRI findings with clinical symptoms.</p><p><strong>Results: </strong>Results revealed that disc deformation was positively correlated with clicking. In contrast, limited mouth opening was significantly associated with anterior disc displacement without reduction and osteoarthrosis, indicating joint degeneration.</p><p><strong>Conclusions: </strong>The findings highlight that limited mouth opening is a more reliable clinical indicator of TMD than joint clicking, which may not always reflect underlying disc displacement. Although clicking was observed in discs with and without displacement, limited mouth opening showed a strong correlation with degenerative changes in the temporomandibular joint. The study underscores the reliability of clinical symptoms of TMD, which play a crucial role in treatment planing.</p><p><strong>Clinical trial number: </strong>Not applicable.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"25 1","pages":"921"},"PeriodicalIF":2.6,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12143089/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144233138","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":"Oral health and oral health-related quality of life in people with Marfan syndrome: a cross-sectional study.","authors":"Nick Jan Tetsch, Jeanette Köppe, Linda Daume, Johannes Kleinheinz, Marcel Hanisch, Ole Oelerich","doi":"10.1186/s12903-025-06318-2","DOIUrl":"10.1186/s12903-025-06318-2","url":null,"abstract":"<p><strong>Background: </strong>Marfan syndrome is a rare connective tissue disorder. This study was initiated to investigate the impact of Marfan syndrome on oral health.</p><p><strong>Methods: </strong>The person-reported perceived OHRQoL was determined using the German short version of the Oral Health Impact Profile (OHIP-G5). In addition, all study participants took part in a clinical examination in which the objective oral health was measured using the Physical Oral Health Index (PhOX).</p><p><strong>Results: </strong>A total of 29 patients took part in the study. Of these, 20 were female and nine male and the median age was 54 years (interquartile range (IQR): 15). The median OHIP-G5 score was three (IQR: 5) (range: 0-15). The median PhOX score was 79 (IQR: 14.5). A statistically significant correlation between the OHIP-G5 and the PhOX could not be determined (r=-0.34, p = 0.074).</p><p><strong>Conclusions: </strong>The study showed that OHRQoL in particular was reduced. The measured oral health was slightly reduced compared to the general population. Nevertheless, Marfan patients should pay great attention to oral hygiene which should be checked by dental professionals at regular intervals.</p><p><strong>Clinical trial number: </strong>Not applicable.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"25 1","pages":"925"},"PeriodicalIF":2.6,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12143032/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144233155","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":"Comparison of responses from different artificial intelligence-powered chatbots regarding the All-on-four dental implant concept.","authors":"Hasan Akpınar","doi":"10.1186/s12903-025-06294-7","DOIUrl":"10.1186/s12903-025-06294-7","url":null,"abstract":"<p><strong>Background: </strong>Recent advancements in Artificial Intelligence (AI) have transformed the healthcare field, particularly through chatbots like ChatGPT, OpenEvidence, and MediSearch. These tools analyze complex data to aid clinical decision-making, enhancing efficiency in diagnosis, treatment planning, and patient management. When applied in the \"All-on-Four\" dental implant concept, AI facilitates immediate prosthetic restorations and meets the demand for expert guidance. This integration boosts the long-term success of surgical outcomes by providing real-time support and improving patient education and postoperative satisfaction. This study aimed to evaluate the effectiveness of three AI-powered chatbots-ChatGPT 4.0, OpenEvidence, and MediSearch-in answering frequently asked questions regarding the All-on-Four dental implant concept.</p><p><strong>Method: </strong>This study investigated the response accuracy of three AI-powered chatbots to common queries about the All-on-Four dental implant concept. Using alsoasked.com, twenty pertinent questions-ten patient-focused and ten technical-were identified. Oral and maxillofacial surgeons evaluated the chatbot responses using a 5-point Likert scale. Statistical analysis was performed with the Kruskal-Wallis test, supplemented by pairwise Mann-Whitney U tests with Bonferroni correction, to assess the significance of differences among the chatbots' performances.</p><p><strong>Results: </strong>The Kruskal-Wallis test showed statistically significant differences between the three chatbots for both patient and technical questions (p < 0.01). Pairwise comparisons were evaluated using the Mann-Whitney U test. While significant differences were found among each chatbot for patient questions, no significant difference was observed between ChatGPT and MediSearch for technical questions (p = 0.158). When comparing responses of the same chatbot to patient and technical questions, it was found that MediSearch performed better in technical questions (p < 0.001).</p><p><strong>Conclusion: </strong>Advancements in technology have made AI-powered chatbots an inevitable influence in specialized medical fields such as Oral, Maxillofacial Surgery. Our findings indicate that these chatbots can provide valuable information for patients undergoing medical procedures and serve as a resource for healthcare professionals.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"25 1","pages":"922"},"PeriodicalIF":2.6,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12142943/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144233140","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":"Investigation of dermatoglyphic patterns for mandibular retrognathism or maxillary prognathism as a novel diagnostic approach for skeletal Class II malocclusion.","authors":"Naela Mohamed Al-Mogahed, Khalid Aldorae, Amourah Rashad Alfakhri, Maram Abdullah Taleb, Wafa'a Al-Sharaeai, Ahmad Mostafa Kahoul","doi":"10.1186/s12903-025-06224-7","DOIUrl":"10.1186/s12903-025-06224-7","url":null,"abstract":"<p><strong>Background: </strong>Dermatoglyphics, the study of fingerprint patterns, is derived from the ectoderm, the same embryological layer responsible for craniofacial development. Its potential as a non-invasive diagnostic tool has been explored in various medical and dental conditions, including skeletal Class II malocclusion.</p><p><strong>Objective: </strong>This study aims to evaluate the correlation between dermatoglyphic patterns and cephalometric angles (SNA and SNB) in Class II skeletal malocclusion to establish a novel diagnostic approach.</p><p><strong>Material and methods: </strong>A total of 100 participants (aged 18:35 years) diagnosed with skeletal Class II malocclusion were evaluated. The participants were divided into two groups: 50 with increased SNA (> 84°) and 50 with decreased SNB (< 78°). Dermatoglyphic patterns, including Whorls, Loops, Tented Loops, Central Pockets, and Arches, were analyzed for all 10 fingers using the ink-and-stamp method. Cephalometric measurements were conducted using standardized lateral cephalogram. Statistical analyses, including Chi-Square tests and correlation analysis, were performed to identify significant associations.</p><p><strong>Results: </strong>Whorl patterns were most associated with increased SNA, while Plain Loops correlated significantly with decreased SNB. The middle finger (F3) and Index finger (F7) emerged as the most reliable indicators of skeletal discrepancies. Chi-Square analysis confirmed a statistically significant association between fingerprint patterns and cephalometric measurements (p < 0.001).</p><p><strong>Conclusion: </strong>Dermatoglyphic patterns, particularly Whorls and Loops, demonstrate strong correlations with SNA and SNB angles in skeletal Class II malocclusion. This study establishes dermatoglyphics as a non-invasive, reliable diagnostic tool for early detection and personalized treatment planning in orthodontics.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"25 1","pages":"926"},"PeriodicalIF":2.6,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12142823/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144233154","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":"The effects of familial factors on the early childhood caries of preschool children: a cross-sectional study.","authors":"Zeynep Aslı Güçlü, Cansu Bilge Karadağ","doi":"10.1186/s12903-025-06140-w","DOIUrl":"10.1186/s12903-025-06140-w","url":null,"abstract":"<p><strong>Introduction: </strong>Early childhood caries (ECC) are highly prevalent globally. This study aims to identify evidence-based familial factors to increase the risk-based management of ECC.</p><p><strong>Methods: </strong>A total of 405 children (aged 0-72 months) presented to the pediatric dentistry department within 2 years were observed via a dental mirror and explorer under dental unit lighting. ECC was diagnosed via visual examination using World Health Organization (WHO) and International Caries Detection and Assessment System (ICDAS) scores. A total of 405 mothers and 399 fathers were interviewed in this study, and a questionnaire regarding parental variables was completed.</p><p><strong>Results: </strong>Most parents with low education levels visit the dental clinic when their child experiences pain or any complaint within 0-72 months. Maternal age was found to affect DMFT (Decayed, Missed, and Filled Permanent Teeth) scores. A statistically significant difference was found between the mean DMFT score according to the age of the mother at the time of delivery (p = 0.045). This study revealed a greater tendency of parents with a high education status to use fluoride. Parents of children without ECC were significantly more likely to have good oral hygiene habits, especially those with dental floss.</p><p><strong>Conclusion: </strong>ECC was found to be related to parents' habits and attention. Health providers should consider parents' knowledge, be aware of many aspects that could contribute to caries balance, and provide anticipatory guidance to parents regarding appropriate dental visits.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"25 1","pages":"920"},"PeriodicalIF":2.6,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12142995/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144233158","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":"Development and validation of a predictive nomogram for bilateral posterior condylar displacement using cone-beam computed tomography and machine-learning algorithms: a retrospective observational study.","authors":"Huachao Sui, Mo Xiao, Xueqing Jiang, Jiaye Li, Feng Qiao, Bin Yin, Yuanyuan Wang, Ligeng Wu","doi":"10.1186/s12903-025-06098-9","DOIUrl":"10.1186/s12903-025-06098-9","url":null,"abstract":"<p><strong>Background: </strong>Temporomandibular disorders (TMDs) are frequently associated with posterior condylar displacement; however, early prediction of this displacement remains a significant challenge. Therefore, in this study, we aimed to develop and evaluate a predictive model for bilateral posterior condylar displacement.</p><p><strong>Methods: </strong>In this retrospective observational study, 166 cone-beam computed tomography images were examined and categorized into two groups based on condyle positions as observed in the sagittal images of the joint space: those with bilateral posterior condylar displacement and those without. Three machine-learning algorithms-Random Forest, Least Absolute Shrinkage and Selection Operator (LASSO) regression, and Extreme Gradient Boosting (XGBoost)-were used to identify risk factors and establish a risk assessment model. Calibration curves, receiver operating characteristic curves, and decision curve analyses were employed to evaluate the accuracy of the predictions, differentiation, and clinical usefulness of the models, respectively.</p><p><strong>Results: </strong>Articular eminence inclination (AEI) and age were identified as significant risk factors for bilateral posterior condylar displacement. The area under the curve values for the LASSO and Random Forest models were both > 0.7, indicating satisfactory discriminative ability of the nomogram. No significant differences were observed in the differentiation and calibration performance of the three models. Clinical utility analysis revealed that the LASSO regression model, which incorporated age, AEI, A point-nasion-B point (ANB) angle, and facial height ratio (S-Go/N-Me), demonstrated superior net benefit compared to the other models when the probability threshold exceeded 45%.</p><p><strong>Conclusion: </strong>Patients with a steeper AEI, insufficient posterior vertical distance (S-Go/N-Me), an ANB angle ≥ 4.7°, and older age are more likely to experience bilateral posterior condylar displacement. The prognostic nomogram developed and validated in this study may assist clinicians in assessing the risk of bilateral posterior condylar displacement.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"25 1","pages":"916"},"PeriodicalIF":2.6,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12142821/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144233142","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":"Comparative evaluation of bone mineral density in premature birth and low birth weight children by fractal analysis on panoramic radiographs.","authors":"Berrin Çelik, Esra Ceren Tuğutlu, Zeynep Betül Arslan","doi":"10.1186/s12903-025-06312-8","DOIUrl":"10.1186/s12903-025-06312-8","url":null,"abstract":"<p><strong>Background: </strong>Bone mineral density (BMD) is a critical indicator of skeletal health, and its assessment is particularly important in children born premature or with low birth weight (LBW), as these conditions are associated with altered bone development. The aim of this study was to compare the BMD values of premature and LBW children with those of normal term and normal birth weight children via fractal dimension (FD) analysis of panoramic radiographs.</p><p><strong>Methods: </strong>This study included a total of 60 panoramic radiography images of children aged 6-15 years. The study group consisted of children born premature (before 37 weeks) and with low birth weight (less than 2500 g). The control group consisted of children born at normal term with normal birth weights. In addition, body mass index (BMI), maternal age at birth, and frequency and duration of incubation were recorded. FD values were measured in three mandibular regions on panoramic images. Independent t-tests and Mann-Whitney U tests were used to compare FD values between groups. The correlations between parameters were evaluated using Pearson and Spearman correlation coefficients. Statistical significance was set at P < 0.05.</p><p><strong>Results: </strong>Comparison of the FD values revealed no significant differences between the study and control groups for ROI1 and ROI2 (p > 0.05). However, a statistically significant difference was detected in ROI3 (p < 0.05), with the study group exhibiting lower mean FD values (1.15 ± 0.14) than the control group (1.22 ± 0.08). There was no statistically significant difference in BMI values between the groups (p > 0.05). The frequency of incubation was significantly higher in the study group (50%) than in the control group (6.7%) (p < 0.05).</p><p><strong>Conclusion: </strong>Fractal dimension values of the trabecular structure in the dentate region of the mandible were decreased in premature birth and LBW children. Further controlled trials with larger sample sizes are required to validate and expand upon these findings.</p><p><strong>Clinical trial number: </strong>Not applicable.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"25 1","pages":"915"},"PeriodicalIF":2.6,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12143029/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144233139","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":"Finite element analysis of occlusal stress in cervical dentin: effects of thickness and cross-section.","authors":"Niloofar Sadat Kashfi, Mohammad Mahdi Jalili, Mina Soltanianzadeh, Maryam Kazemipoor","doi":"10.1186/s12903-025-06184-y","DOIUrl":"10.1186/s12903-025-06184-y","url":null,"abstract":"<p><strong>Background & objective: </strong>The cervical region of dentin plays a crucial role in the distribution of masticatory forces, with vertical root fractures often initiating and spreading from this area. This study investigates the distribution of occlusal stresses in the cervical region of root dentin, considering varying thicknesses and cross-sections, using Finite Element Analysis.</p><p><strong>Materials & methods: </strong>Sections from central and premolar teeth were imported into CAD to create 3D models. The tooth structure and surrounding tissues were modeled using mechanical properties such as Young's modulus and Poisson's ratio. Four cross-sectional shapes-circular, oval, sand clock, and kidney-were designed. A force of 50 Newtons, representing the occlusal force of the opposing tooth, was applied to the palatal surface of the models at a 60° angle for anterior teeth and a 45° angle for premolars. The stress distribution in the cervical dentin was then analyzed.</p><p><strong>Results: </strong>Von Mises stress values indicated that stress points were highest in the kidney, sand clock, oval, and circular cross-sections, respectively. Increased thickness of the residual dentinal wall resulted in reduced maximum and minimum stress and a smaller area of stress regions. In all cross-sections, the minimum and maximum stress points were predominantly on the palatal and buccal sides of the cervical dentin, respectively.</p><p><strong>Conclusion: </strong>The study demonstrated that stress distribution in teeth varies with different root cross-sections, with higher stress observed in the sand clock and kidney cross-sections. Thinner dentin in the cervical region leads to greater stress concentration, especially in the buccal area of the tooth.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"25 1","pages":"924"},"PeriodicalIF":2.6,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12142983/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144233153","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}