BMC Oral Health最新文献

{"title":"Effect of magnification and press-on force on resin composite polishing.","authors":"Tuna Unal, Bora Korkut, Dilek Tağtekin","doi":"10.1186/s12903-025-06844-z","DOIUrl":"10.1186/s12903-025-06844-z","url":null,"abstract":"<p><strong>Objective: </strong>To evaluate surface roughness (Ra) and gloss (GU) of two resin composites after polishing with two systems, using a novel press-on force guided (PFG) polishing simulator.</p><p><strong>Materials and methods: </strong>Eighty specimens were prepared using Essentia Universal (EU) and G-aenial Universal Injectable (GUI) composites. Surface roughness and gloss were assessed by a profilometer (Marsurf Ps10), and a glossmeter (Novo-Curve). They were polished with Sof-Lex and Twist Dia systems with or without magnification and PFG. Each polishing material was used for 30 s. Ra₁ and GU₁ measurements were repeated by the same operator. Data were analyzed using One-way ANOVA, Three-way ANOVA, and Robust ANOVA with Bonferroni Correction for multiple comparisons and Spearman's rho Correlation Coefficient (< 0.050).</p><p><strong>Results: </strong>Higher Ra values were observed in GUI group for Twist Dia (0.33 ± 0.05^z) compared to SofLex (0.22 ± 0.08^y). Roughness was higher when PFG was uncontrolled (0.31 ± 0.07^x), compared to the controlled (0.25 ± 0.09^w). No Ra difference was observed in EU group between SofLex (0.33 ± 0.04) and Twist Dia (0.29 ± 0.04)(P = .440). Uncontrolled PFG provided higher gloss for GUI and EU composites (69.7 ± 2.91^x, 54.63 ± 18.68^x, respectively). Twist Dia presented higher gloss for GUI and EU composites (72.3 ± 2.57^z,58.88 ± 13.73^z, respectively). Magnification did not affect the roughness or gloss for both composites (P ≥ .05). A moderate negative correlation was found between roughness and gloss in GUI (r=-.546)(P < .001), while no correlation was observed in EU (r=-.110)(P = .449).</p><p><strong>Conclusion: </strong>Higher surface roughness and gloss were observed with uncontrolled (not constant) press-on force. Even though SofLex may provide a lower surface roughness, Twist Dia can generate a greater surface gloss regardless of the composite type. 3.5X loupe magnification was not effective on surface roughness and gloss within a limited polishing time.</p><p><strong>Clinical relevance: </strong>Press-on force is an important factor affecting the composite polishing quality. Spiral polishing wheels can be advantageous for composite restoration polishing, as they better preserve the secondary and tertiary anatomies and provide a higher gloss. The effect of magnification on composite polishing can be related to the time spent using it.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"25 1","pages":"1600"},"PeriodicalIF":3.1,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12514787/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145273737","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":"Associations among smoking status, including the use of cigarettes, electronic cigarettes, and heated cigarettes, periodontal condition, and tooth loss in employed Japanese adults: a cross-sectional study.","authors":"Hiroko Hashimoto, Yoshihiro Shimazaki, Toshiya Nonoyama, Hisanao Kito, Nobuhiro Segawa, Makoto Okai, Noriyasu Uchibori, Sayuri Tomaru, Misako Kawahara","doi":"10.1186/s12903-025-07003-0","DOIUrl":"10.1186/s12903-025-07003-0","url":null,"abstract":"<p><strong>Background: </strong>Information on the effects of the use of electronic cigarettes and heated cigarettes on oral health status is sparse. In addition, few studies have reported the oral health behaviours of the users of such products. We examined the associations among smoking status (including the use of cigarettes and electronic/heated cigarettes), oral health behaviours, periodontal condition, and tooth loss in employed Japanese adults.</p><p><strong>Methods: </strong>The participants were 512 employees of 20 business offices of 19 companies that are members of the Aichi Branch of the Japan Health Insurance Association. Between December 2019 and March 2020, we performed dental examinations and asked the participants to complete self-administered questionnaires. We obtained the results of specific health check-ups from the Japan Health Insurance Association. Periodontal status was evaluated using the Community Periodontal Index and the loss of attachment. Multivariable linear regression analysis and structural equation modelling were performed to examine the relationship between periodontal condition/tooth loss and other factors.</p><p><strong>Results: </strong>In multivariable linear regression analysis, smokers had 1.38 fewer teeth on average compared to nonsmokers. Compared to nonsmokers, those who smoked cigarettes, electronic/heated cigarettes, or both had 15.4%, 17.9%, and 12.1% greater proportions of teeth with probing depth (PD) ≥ 4 mm and had 16.6%, 19.2%, and 9.99% greater proportions of teeth with attachment loss (AL) ≥ 4 mm, respectively. In structural equation modelling, cigarette smokers and participants who had no interest in oral health had fewer teeth. Cigarette smokers, electronic/heated cigarette smokers, and those who did not make an effort to care for their teeth still had more teeth with ≥ 4 mm PD and teeth with ≥ 4 mm AL.</p><p><strong>Conclusion: </strong>The use of all cigarette types was significantly associated with poor oral health status. Smokers tended to pay less attention to their oral health, leading to poorer oral hygiene habits and worsening periodontal status. Providing smoking cessation support in workplaces and dental offices is important for maintaining the oral health of occupational adults. Because cross-sectional studies cannot clarify causality or the direction of the association between smoking and oral health status, further longitudinal studies are needed.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"25 1","pages":"1590"},"PeriodicalIF":3.1,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12512885/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145273760","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":"Semi-automatic detection of anteriorly displaced temporomandibular joint discs in magnetic resonance images using machine learning.","authors":"Bin Ji, Yang Liu, Bin Zhou, Rui Mi, Yumeng Liu, Yungang Lv, Panying Wang, Yanjiao Li, Qingjun Sun, Nashan Wu, Yuping Quan, Songxiong Wu, Long Yan","doi":"10.1186/s12903-025-06981-5","DOIUrl":"10.1186/s12903-025-06981-5","url":null,"abstract":"<p><strong>Background: </strong>Accurate diagnosis of anterior disc displacement (ADD) is essential for managing temporomandibular joint disorders (TMJ). This study employed machine learning (ML) to automatically detect anteriorly displaced TMJ discs in magnetic resonance images (MRI).</p><p><strong>Methods: </strong>This retrospective study included patients with TMJ disorders who visited the Hospital between January 2023 and June 2024. Five machine learning models-decision tree (DT), K-nearest neighbors (KNN), support vector machine (SVM), random forest (RF), and logistic regression (LR)-were utilized to train and validate radiomics data derived from TMJ imaging. Model performance was assessed using an 8:2 train-test split, evaluating accuracy with metrics such as area under the curve (AUC), sensitivity, specificity, precision, and F1 score. After manual delineation of TMJ ROIs by an experienced radiologist (serving as reference standard), radiomic feature extraction included first-order statistics, size- and shape-based features, and texture features.The open-phase, close-phase, and open and close fusion radiomics image features were evaluated separately.</p><p><strong>Results: </strong>The study analyzed 382 TMJs from 191 patients, comprising 214 normal joints and 168 abnormal joints. The fusion radiomics model using five classifiers surpassed both open-phase and close-phase models, demonstrating superior performance in both training and validation cohorts. The fusion radiomics model consistently outperformed single-phase analyses across both diagnostic tasks. For normal vs. abnormal TMJ discrimination, the Random Forest (RF) classifier demonstrated robust performance with AUCs of 0.889 (95% CI: 0.854-0.924) in training and 0.874 (95% CI: 0.799-0.948) in validation.Complete performance metrics for all five classifiers are detailed in the main text.</p><p><strong>Conclusions: </strong>The fusion radiomics model effectively distinguished normal from abnormal joints and differentiated between ADDwR and ADDwoR, supporting personalized treatment planning.</p><p><strong>Clinical trial number: </strong>not applicable.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"25 1","pages":"1591"},"PeriodicalIF":3.1,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12513056/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145273865","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":"A rare case report: calcifying odontogenic cyst mimicking lateral periodontal cyst with 1-year Follow-up.","authors":"Shimei Wang, Yutian Zhang, Yihang Zhong, Jiezhong Guan, Chuanjiang Zhao, Panpan Wang","doi":"10.1186/s12903-025-06985-1","DOIUrl":"10.1186/s12903-025-06985-1","url":null,"abstract":"<p><strong>Background: </strong>Lateral periodontal cyst (LPC) and calcifying odontogenic cyst (COC) represent diagnostically challenging odontogenic lesions due to overlapping clinical and radiographic features. However, COC is exceptionally rare in periodontal tissues with only one case reported in the literature.</p><p><strong>Case presentation: </strong>In this case, a 35-year-old male presented with an asymptomatic gingival swelling between teeth #22 and #23. Initial clinical examination revealed a 1.5 cm x 1 cm firm, translucent swelling with deep periodontal probing depths (PD) (14-15 mm). Radiographic evaluation demonstrated a well-circumscribed radiolucency between vital tooth roots, initially suggestive of LPC. However, histopathological analysis identified characteristic ghost cells and dystrophic calcifications, confirming a final diagnosis of COC. The lesion was managed with conservative enucleation and guided tissue regeneration, omitting peripheral ostectomy. At one year follow-up, complete osseous regeneration was observed with no evidence of recurrence. PD normalized to ≤ 3 mm, demonstrating successful periodontal restoration.</p><p><strong>Conclusions: </strong>This case highlights three critical clinical insights: the necessity of histopathological confirmation for definitive diagnosis of radiographically ambiguous odontogenic cysts; the potential for conservative management in select COC cases without aggressive features; the importance of Cone-Beam Computed Tomography in evaluating cortical integrity and lesion extent. These findings contribute to evolving understanding of COC management paradigms, suggesting tailored surgical approaches may be appropriate based on lesion characteristics and radiographic findings. Long-term follow-up remains essential to validate treatment outcomes.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"25 1","pages":"1592"},"PeriodicalIF":3.1,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12512414/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145273770","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 the prevalence and linear measurements of the retromolar Canal on cone beam CT scans in Palestine and China.","authors":"Gang Chen, Omran Altos","doi":"10.1186/s12903-025-06895-2","DOIUrl":"10.1186/s12903-025-06895-2","url":null,"abstract":"<p><strong>Background: </strong>The retromolar canal (RMC) is a mandibular anatomical variation containing neurovascular structures that may impact the success of anesthesia and surgical procedures in the posterior mandible. Its prevalence varies across populations, yet no prior comparative study has assessed RMC characteristics between Chinese and Palestinian populations. This study aims to evaluate and compare the prevalence, classification, and linear measurements of RMCs in these two groups using cone beam computed tomography (CBCT).</p><p><strong>Methods: </strong>A total of 300 bilateral CBCT scans (150 Chinese and 150 Palestinian) were retrospectively analyzed. RMCs were identified and classified according to Von Arx's system into Types A, B, and C. Linear measurements of length and diameter were taken using CBCT software. Statistical analysis included descriptive statistics, the Kolmogorov-Smirnov test for normality, independent samples t-tests, ANOVA, paired t-tests, chi-square tests, and Pearson's correlation, with significance set at p < 0.05.</p><p><strong>Results: </strong>RMC prevalence was 22% in the Chinese group and 12% in the Palestinian group. Type B was the most common configuration in both populations. No significant differences were found regarding sex or mandibular side. Mean RMC length was slightly higher in the Chinese sample (12.02 ± 2.82 mm) compared to the Palestinian sample (10.95 ± 3.28 mm). Male participants exhibited significantly larger RMC diameters than females in both populations (p = 0.030). No significant correlation was observed between RMC presence and third molar eruption patterns (p = 0.634).</p><p><strong>Conclusions: </strong>This study identified ethnic differences in RMC prevalence and morphology, with higher occurrence in the Chinese population. Although not associated with third molar eruption, RMC remain clinically relevant due to potential surgical and anesthetic complications. These findings underscore the importance of CBCT imaging in preoperative planning to enhance patient safety and procedural outcomes.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"25 1","pages":"1593"},"PeriodicalIF":3.1,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12512705/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145273776","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":"Facial volume reduction and masticatory function after masseter botulinum toxin injection: a prospective study.","authors":"Napasorn Sawadsopanont, Kanin Arunakul, Chanita Tantipoj","doi":"10.1186/s12903-025-06990-4","DOIUrl":"10.1186/s12903-025-06990-4","url":null,"abstract":"<p><strong>Background: </strong>Botulinum toxin type A (BTX-A) is widely used for masseter reduction to improve lower facial contour. While its esthetic effects are well established, the potential impact on masticatory function remains unclear, particularly in healthy individuals. This study aimed to evaluate changes in facial volume, patient satisfaction, and perceived chewing function following BTX-A injection.</p><p><strong>Methods: </strong>A quasi-experimental clinical trial was conducted in 24 healthy adults who received bilateral masseter injections of BTX-A (50 units total). Lower face volume was assessed using 3D stereophotogrammetry at baseline and at 4, 8, and 12 weeks post-injection. Patient satisfaction was measured using the FACE-Q™ questionnaire, and masticatory function was assessed with the Chewing Function Questionnaire (CFQ) and visual analog scale (VAS). Friedman and Wilcoxon signed-rank tests were used for statistical analysis.</p><p><strong>Results: </strong>Significant reductions in lower face volume were observed at all follow-up time points (p < 0.05), with the greatest change occurring by week 12. Satisfaction scores with facial appearance and treatment outcome significantly increased. Masticatory function remained stable, with no significant changes in CFQ or VAS scores. Participants reported no perceived decline in chewing ability throughout the study period.</p><p><strong>Conclusion: </strong>Our results suggest that botulinum toxin injection into the masseter muscle may reduce lower face volume and improve patient satisfaction without compromising perceived masticatory function in healthy adults. These findings provide preliminary evidence for the esthetic application of BTX-A and may contribute to future investigations into its potential roles in areas such as bruxism management and prosthodontic planning.</p><p><strong>Trial registration: </strong>TCTR20240617001. Registered on June 17th, 2024.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"25 1","pages":"1595"},"PeriodicalIF":3.1,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12512921/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145273772","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":"Can ChatGPT be trusted? Evaluating AI responses to oral health questions among pregnant Arabic-speaking women.","authors":"Khalid Talal Aboalshamat, Jomanh Humied Alnafei, Lojain Ahmed Alkhattabi, Ghadi Yaqoub Alhawsawi, Shrooq Majed Alahmadi, Shatha Omar Almalki, Afnan Anas Nassar","doi":"10.1186/s12903-025-06909-z","DOIUrl":"10.1186/s12903-025-06909-z","url":null,"abstract":"<p><strong>Background: </strong>ChatGPT, an artificial intelligence (AI) chatbot developed by OpenAI, is increasingly being used in healthcare, including dentistry, for patient education; this study aimed to assess the usability and quality of ChatGPT's responses to pregnancy-related oral health queries in Saudi Arabia.</p><p><strong>Method: </strong>This two-part cross-sectional study assessed pregnant Arabic women's perceptions of ChatGPT for oral health queries and evaluated its responses using an online questionnaire. Responses from ChatGPT-4o mini were rated by 5 dental experts with regard to accuracy, clarity, relevance, and acceptance using a 5-point Likert scale.</p><p><strong>Results: </strong>Among the 300 participants, 42.0% (126) knew about ChatGPT, 33.7% (101) had previously used it, 14.3% (43) had used it to obtain medical information, 8.7% (26) had used it for dental information, and 8.3% (25) had used it for dental information during pregnancy. Attitudes regarding ChatGPT were rated from 1 to 4. Except for 1 item, the means were all above the midpoint. Attitude ratings ranged from a mean of 2.71 (SD 0.76) for ChatGPT competency to a mean of 2.34 (SD 0.92) for its ability to replace human interactions. However, ChatGPT competency (P = .028), security (P = .015), willingness to use ChatGPT for inquiries (P = .021), ability to assist in informed decision-making (P = .01), willingness to make decisions based on recommendations (P = .024), and persuasiveness (P = .049) were significantly different based on educational level. Pregnant women with higher levels of education rated these aspects significantly lower than those with a high school diploma or bachelor's degree.</p><p><strong>Conclusion: </strong>ChatGPT provided useful oral health information for pregnant individuals, but its responses required revision and supervision by health professionals. Its usage among pregnant women in Saudi Arabia remained low.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"25 1","pages":"1597"},"PeriodicalIF":3.1,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12513007/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145273720","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":"AI-driven abstract generating: evaluating LLMs with a tailored prompt under the PRISMA-A framework.","authors":"Gizem Boztaş Demi̇r, Şule Gökmen, Yağızalp Süküt, Kübra Gülnur Topsakal, Serkan Görgülü","doi":"10.1186/s12903-025-06982-4","DOIUrl":"10.1186/s12903-025-06982-4","url":null,"abstract":"<p><strong>Background: </strong>This study aimed to assess and compare ChatGPT-4o and Gemini Pro's ability to generate structured abstracts from full-text systematic reviews and meta-analyses in orthodontics, based on adherence to the PRISMA Abstract (PRISMA-A) Checklist, using a customised prompt developed for this purpose.</p><p><strong>Materials and methods: </strong>A total of 162 full-text systematic reviews and meta-analyses published in Q1-ranked orthodontic journals since January 2019 were included. Each full-text article was processed by ChatGPT-4o and Gemini Pro, using a PRISMA-A Checklist-aligned structured prompt. Outputs were scored using a tailored Overall quality Score OQS derived from 11 PRISMA-A checklist. Inter-rater and time-dependent reliability were assessed with Intraclass Correlation Coefficients (ICCs), and model outputs were compared using Mann-Whitney U tests.</p><p><strong>Results: </strong>Both models yielded satisfactory OQS in generating PRISMA-A checklist compliant abstracts; however, ChatGPT-4o consistently achieved higher scores than Gemini Pro. The most notable differences were observed in the \"Included Studies\" and \"Synthesis of Results\" sections, where ChatGPT-4o produced more complete and structurally coherent outputs. ChatGPT-4o achieved a mean OQS of 21.67 (SD 0.58) versus 21.00 (SD 0.71) for Gemini Pro, a difference that was highly significant (p < 0.001).</p><p><strong>Conclusions: </strong>Both LLMs demonstrated the ability to generate PRISMA-A-compliant abstracts from systematic reviews, with ChatGPT-4o consistently achieving higher quality scores than Gemini Pro. While tested in orthodontics, the approach holds potential for broader applications across evidence-based dental and medical research. Systematic reviews and meta-analyses are essential to evidence-based dentistry but can be challenging and time-consuming to report in accordance with established standards. The structured prompt developed in this study may assist researchers in generating PRISMA-A-compliant outputs more efficiently, helping to accelerate the completion and standardisation of high-level clinical evidence reporting.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"25 1","pages":"1594"},"PeriodicalIF":3.1,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12512598/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145273764","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of two-step mock-up methods on the trueness of complete-arch trial restorations: an in vitro study.","authors":"Chunxiao Jin, Weiwei Huang, Liya Ma, Yueli Zhou, Mengxun Li, Yake Wang, Cui Huang","doi":"10.1186/s12903-025-06978-0","DOIUrl":"10.1186/s12903-025-06978-0","url":null,"abstract":"<p><strong>Background: </strong>To assess the trueness of trial restorations fabricated using the two-step mock-up methods with varying distributions of hard tissue stop areas in the complete-arch mock-up process and to compare these outcomes with the one-step method.</p><p><strong>Methods: </strong>Complete-arch digital diagnostic waxings were designed on a worn maxillary cast. The original waxings were modified into four intermediate versions, each retaining a different set of original worn teeth: bilateral molars, molars and incisors, lateral incisors along with canines and molars, or alternating teeth. One complete-arch waxing cast, four intermediate waxing casts and 25 original worn casts were 3D printed, and silicone indices were prepared. Trial restorations were made by injecting bis-acrylic resin into the silicone indices and curing under pressure. Five groups were formed, one-step (Group 1) and four two-step methods (Groups 2-5). Root mean square (RMS) was applied for 3D analysis (global and tooth levels). Point-to-point measurements were used for 2D occlusal surfaces. One-way ANOVA with post-hoc tests was performed to assess intergroup differences.</p><p><strong>Results: </strong>Significant differences in overall trueness were found among the five groups (F (4,20) = 92.61, P < 0.001). Group 1 (one-step) showed the largest mean RMS deviation (0.31 ± 0.02 mm) while Group 5 (alternating teeth) had the smallest (0.15 ± 0.01 mm), not significantly different from Group 4 (0.17 ± 0.01 mm). Tooth-level 3D analyses revealed a similar pattern, with the largest deviations observed at premolars (0.34 ± 0.07 mm) and canines (0.60 ± 0.09 mm) in Group 1, both significantly greater than Groups 4 and 5 (< 0.17 mm, all P < 0.001). Occlusal surface 2D analyses showed statistically significant differences among groups (all P < 0.001), with Group 1 reaching 0.58 ± 0.12 mm at premolars compared with 0.16 ± 0.09 mm in Group 5.</p><p><strong>Conclusions: </strong>The two-step methods enhance the trueness of complete-arch trial restorations compared to the one-step method, with increased supporting teeth reducing overall deviations.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"25 1","pages":"1588"},"PeriodicalIF":3.1,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12512452/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145273744","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":"Evaluating the role of the smartjournal digital intervention in improving oral hygiene among nursing home residents: a cluster randomised trial.","authors":"Enes Karamehmedovic, Lene Elisabeth Myhren, Knut Helge Midtbø Jensen, Ewa Joanna Rodakowska, Anne-Kristine Nordrehaug Åstrøm, Elisabeth Lind Melbye","doi":"10.1186/s12903-025-06994-0","DOIUrl":"10.1186/s12903-025-06994-0","url":null,"abstract":"<p><strong>Background: </strong>The increasing ageing population has led to increased incidence of chronic conditions, including oral diseases, which are prevalent and overlooked in older adults, especially those in institutional care. Poor oral health is linked to systemic disease, reduced quality of life, and challenges in caregiving, particularly among individuals with dementia who often resist assistance. Barriers related to oral care reported by caregivers include a lack of training, time, and documentation systems. Current interventions largely focus on staff education, with limited and inconsistent outcomes. To support caregivers, a digital tool, the SmartJournal, has been developed to improve oral care through documentation, assessment and education. The aim of the present study was to evaluate the effectiveness of the use of SmartJournal for improving oral hygiene among nursing home residents.</p><p><strong>Methods: </strong>A pragmatic parallel-group cluster randomised trial was conducted in 12 nursing homes in Rogaland County, Norway. The trial lasted for nine months, with clinical assessments at baseline and at the 3-month and 9-month follow-ups. Randomisation occurred at the nursing home level via simple randomisation. The mucosal-plaque score (MPS) was used as the primary outcome measure. A generalised linear mixed-effects model (GLMM) was used to evaluate the effect of the intervention, adjusted for participant characteristics and clustering, following the intention-to-treat (ITT) approach.</p><p><strong>Results: </strong>The analysis revealed no significant difference in oral hygiene between the groups at baseline (p = 0.455) or at the second follow-up (p = 0.292). Within-group analysis revealed a significant improvement during the study in the intervention group (p = 0.047).</p><p><strong>Conclusions: </strong>The SmartJournal intervention led to greater improvement in the oral hygiene score, but the difference between the groups was not statistically significant. A larger-scale study is needed to confirm these findings.</p><p><strong>Trial registration: </strong>NCT05724043. Date: 2023-01-10.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"25 1","pages":"1589"},"PeriodicalIF":3.1,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12512849/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145273756","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}