BMC Oral Health最新文献

{"title":"Accuracy of PSI-based hybrid workflow using a temporary intermediate splint versus conventional splint-based maxillary positioning in orthognathic surgery: a retrospective cohort study.","authors":"Jonathan Bertram, Henry Leonhardt, Fred Podmelle, Thomas Teltzrow, Adrian Franke","doi":"10.1186/s12903-026-09695-4","DOIUrl":"10.1186/s12903-026-09695-4","url":null,"abstract":"<p><strong>Background: </strong>This retrospective cohort study, adhering to STROBE guidelines, compared the accuracy of maxillary positioning achieved with a patient-specific implant (PSI)-based hybrid workflow, which utilised a temporary intermediate splint to identify and remove posterior bony interferences before definitive splintless PSI fixation, to conventional splint-based positioning using stock titanium osteosynthesis plates in orthognathic surgery. Translational and rotational movement deviations from the virtual surgical plan were assessed.</p><p><strong>Methods: </strong>Twenty-six patients who underwent non-segmental Le Fort I osteotomy between January 2020 and June 2023 were included. Eleven patients received the PSI-based hybrid workflow, while 15 patients underwent conventional splint-based positioning. Group allocation was based on the logistical feasibility of PSI planning and manufacturing rather than randomisation. Pre- and postoperative 3D images were superimposed using IPS® Case Designer software (KLS Martin) to quantify deviations in three translational and three rotational axes. Between-group comparisons were conducted using unpaired t-tests and two-way ANOVA, and correlations were assessed using Pearson's coefficient.</p><p><strong>Results: </strong>The mean translational deviation was significantly lower in the PSI group compared to the control group (0.46 ± 0.33 mm vs 0.79 ± 0.58 mm; p = .0044), as was the mean rotational deviation (0.82° ± 0.91° vs 1.24° ± 0.85°; p = .0397). Significant differences were identified for vertical translation (p = .0162) and yaw rotation (p = .0205). Operating time did not differ significantly between groups (p = . 1739). In the PSI group, greater planned displacement showed a weak correlation with larger deviations, a relationship not observed in the control group.</p><p><strong>Conclusions: </strong>The PSI-based hybrid workflow resulted in statistically greater positioning accuracy compared to conventional splint-based fixation. However, the absolute improvements (approximately 0.3 mm and 0.5°) were small, likely of limited clinical relevance, and were not associated with reduced operating times. Due to the retrospective, non-randomised design, small sample size, and use of a PSI-based hybrid protocol, these findings should be considered hypothesis-generating. Larger prospective studies evaluating fully splintless PSI workflows and patient-centred outcomes are recommended.</p><p><strong>Clinical trial number: </strong>Not applicable.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"26 1","pages":""},"PeriodicalIF":3.8,"publicationDate":"2026-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13505116/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148811813","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":"Accuracy of teledentistry in detecting dental caries among school children in Makkah City: a diagnostic comparative study.","authors":"Alaa H Qari, Shiamaa Almashhadani, Afnan A Nassar, Ibraheem K Bamaga, Khalid Aboalshamat, Reham M Alsamman, Ola Sheiko, Anmar Dahlawi, Banan Alandanusi, Othoob Almobarak, Abdullah Albadah, Ryyan Elmalik, Abdulaziz A Bugis, Jilen Patel, Mohamed Estai","doi":"10.1186/s12903-026-09613-8","DOIUrl":"10.1186/s12903-026-09613-8","url":null,"abstract":"<p><strong>Background: </strong>Early detection of dental caries is essential to prevent disease progression and reduce treatment burden. In school settings, access to conventional dental screening is often limited, highlighting the need for scalable approaches to support early identification and referral. This study aimed to evaluate the diagnostic accuracy of smartphone-based teledentistry for detecting dental caries among schoolchildren in Makkah, Saudi Arabia.</p><p><strong>Methods: </strong>A diagnostic accuracy study was conducted among 12-13-year-old students from ten intermediate schools. A total of 336 students completed both in-field clinical examination and remote assessment of intraoral photographs captured during the same visit using a standardized protocol. Caries was assessed using the International Caries Detection and Assessment System (ICDAS) and analyzed at the tooth level by assigning the highest score per tooth. Diagnostic accuracy measures, including sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV), overall accuracy, and Cohen's kappa, were calculated. Receiver operating characteristic (ROC) analysis was performed, and mean decayed, missing, and filled teeth scores (DMFT/dmft) were compared between both modalities using paired t-tests.</p><p><strong>Results: </strong>Remote assessment demonstrated a sensitivity of 77.4% and specificity of 96.6%, with an overall accuracy of 93.4% and substantial agreement with clinical examination (kappa = 0.76). The area under the ROC curve was 0.774. Mean DMFT for permanent dentition was slightly lower in remote assessment compared with clinical examination (3.47 ± 2.71 vs. 3.80 ± 2.61; p < 0.001), while no statistically significant difference was observed for dmft in primary dentition.</p><p><strong>Conclusions: </strong>Smartphone-based teledentistry demonstrated high specificity, and acceptable diagnostic accuracy for caries detection among intermediate schoolchildren in mixed dentition stage. Despite moderate sensitivity, it may serve as an effective screening and triage tool in school-based oral health programs serving populations similar to those included in the present study.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"26 1","pages":""},"PeriodicalIF":3.8,"publicationDate":"2026-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13615597/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149058349","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":"Multimodal transformer-enhanced deep learning for accurate assessment of mandibular third molar-inferior alveolar canal contact using panoramic radiography and CBCT slices.","authors":"Rasool Esmaeilyfard, Nika Shahbeyk, Setare Sanchooli, Naeimeh NikfarjamNouri","doi":"10.1186/s12903-026-09012-z","DOIUrl":"10.1186/s12903-026-09012-z","url":null,"abstract":"<p><strong>Background: </strong>Accurate preoperative assessment of the spatial relationship between mandibular third molars (M3Ms) and the inferior alveolar canal (IAC) is essential to minimize the risk of nerve injury. While panoramic radiographs (PRs) are routinely used as a first-line modality, their two-dimensional nature limits diagnostic reliability, often necessitating confirmatory cone-beam computed tomography (CBCT).</p><p><strong>Methods: </strong>We developed a dual-stream, transformer-enhanced multimodal (panoramic radiography + selected CBCT slices) deep learning framework designed as a clinician-in-the-loop system. The model jointly processes paired panoramic radiographs and operator-selected CBCT slices to simulate a realistic specialist consultation. Four widely used high-performance backbones (ConvNeXt, Swin Transformer, ResNet-50, and VGG16) were systematically evaluated on a dataset of 250 paired PR-CBCT cases. Model performance was assessed using F₁-score, precision, recall, and area under the ROC curve (AUC). Model interpretability was explored using SHAP-based explainability analysis.</p><p><strong>Results: </strong>Among the evaluated architectures, the ConvNeXt-based model achieved the highest overall performance, with a macro F₁-score of 0.9478, precision of 0.9515, and recall of 0.9468. The learned embeddings showed good class separability, and explainability analyses highlighted anatomically meaningful regions consistent with established radiographic risk signs.</p><p><strong>Conclusion: </strong>The proposed multimodal 2D framework demonstrates competitive and robust classification performance. By integrating expert slice selection with automated feature extraction, the model functions as a standardized decision-support tool, aimed at reducing diagnostic variability in complex boundary cases where visual interpretation alone may be subjective.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"26 1","pages":""},"PeriodicalIF":3.8,"publicationDate":"2026-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13525682/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148857136","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 Angulated Screw Channel (ASC) design on the fracture resistance of implant-supported monolithic zirconia and lithium disilicate crowns: an in vitro study.","authors":"Bedia Gökten Uçar, Özlem Çölgeçen","doi":"10.1186/s12903-026-09566-y","DOIUrl":"10.1186/s12903-026-09566-y","url":null,"abstract":"<p><p>Ti-base abutments with angulated screw channel (ASC) designs have been developed to address the esthetic challenges associated with labial screw access in anterior implant-supported single crowns, as well as the ergonomic limitations caused by restricted mouth opening in posterior crowns. Despite their increasing clinical use, there is limited research evaluating the impact of this design on the fracture resistance of various monolithic restorative materials across different anatomical regions, particularly after aging. This study aims to investigate the effect of angled screw channel design on the fracture resistance of implant-supported single crown restorations made of different materials in different anatomical regions after long-term thermal aging. In the study, a total of 80 implant-supported single crown restorations were prepared and then divided into subgroups (n = 10) considering anatomical region (anterior/posterior), restoration material (monolithic zirconia/lithium disilicate), and screw channel design (straight 0^°/angled 20^°). Monolithic zirconia and lithium disilicate crowns were fabricated in the form of maxillary central incisors for anterior, and mandibular first molars for posterior specimens. After cementation on Ti-base abutments, the specimens were aged with 40,000 thermal cycles (5^°C/55^°C), and the fracture resistance of the crowns was subsequently determined using a universal testing machine under compressive loading. Fracture patterns were examined under a stereomicroscope. Three-way analysis of variance followed by a Bonferroni post hoc test was used in data analysis (α = 0.05). According to the results, anatomical region, restorative material, screw channel design, and the interactions between these variables had a significant effect on the fracture resistance of implant-supported single crown restorations (p < 0.001). The use of ASC design reduced the fracture resistance of the restoration material in all groups, regardless of anatomical region and material type (p < 0.001). In the anterior region, using the ASC design resulted in a statistically significant strength loss, which was similar across all materials. In the posterior region, although zirconia material showed significantly higher fracture strength than lithium disilicate, the strength loss was more pronounced. The fracture loads observed in all specimens remained within reported physiological bite force ranges under the present experimental conditions. In conclusion, although the ASC design offers clinical advantages for implant-supported restorations, its effect on reducing the mechanical strength of the restorative material should be taken into account in clinical practice. While the fracture loads observed in this study remained within physiological limits, further investigations under long-term and in vivo conditions are warranted.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"26 1","pages":""},"PeriodicalIF":3.8,"publicationDate":"2026-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13543384/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148891027","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":"Diagnostic accuracy of ChatGPT and teledentistry compared with dentist examination in detecting dental caries: preliminary diagnostic accuracy study.","authors":"Inas Karawia, Aya Mahmoud, Rewan Ali, Marie Kamal, Aya Gaber, Mohamed Ashraf Hall","doi":"10.1186/s12903-026-09638-z","DOIUrl":"10.1186/s12903-026-09638-z","url":null,"abstract":"<p><strong>Introduction: </strong>Dental caries is a common oral health problem globally, necessitating accurate and accessible diagnostic approaches. This study aimed to evaluate and compare the diagnostic accuracy of ChatGPT (AI-based assessment) and teledentistry with the clinical dental examination as the clinical reference standard for detecting dental caries.</p><p><strong>Methodology: </strong>A diagnostic accuracy study was conducted on a sample of 40 tooth images, determined through power analysis. Standardized smartphone images were obtained and assessed independently using two approaches: ChatGPT-based analysis and teledentistry evaluation by dental professionals. The findings from both methods were compared to clinical examination results. Diagnostic performance was evaluated using sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV), accuracy, and area under the curve (AUC). Agreement with the clinical reference standard was assessed using Cohen's kappa coefficient, while the McNemar test was used to assess systematic differences between paired classifications.</p><p><strong>Results: </strong>Teledentistry showed numerically higher diagnostic performance than ChatGPT across all evaluated parameters. It achieved higher sensitivity (89.5% vs. 78.9%), specificity (85.7% vs. 66.7%), PPV (85% vs. 68.2%), NPV (90% vs. 77.8%), and overall accuracy (87.5% vs. 72.5%). Additionally, teledentistry showed a higher AUC (0.876) compared to ChatGPT (0.728), suggesting better discriminative ability. Both methods showed no statistically significant differences from the clinical reference standard; however, ChatGPT exhibited greater inconsistency.</p><p><strong>Conclusion: </strong>Teledentistry demonstrated higher diagnostic accuracy and agreement with the clinical reference standard than ChatGPT in this preliminary study and may serve as a reliable diagnostic adjunct, particularly in remote settings. However, further refinement and validation of AI-based tools such as ChatGPT are necessary to improve diagnostic performance, with future research focusing on optimizing image quality and expanding datasets to enhance AI reliability.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"26 1","pages":""},"PeriodicalIF":3.8,"publicationDate":"2026-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13499293/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148787935","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":"CT-based morphometric analysis of the zygomatic region: infraorbital foramen localization, bone thickness, and sutural relationships.","authors":"Hilal Melis Altıntaş, Serdar Sipahioğlu, Gözde Cingöz, Hacer Eberliköse, Berin Tuğtağ Demir","doi":"10.1186/s12903-026-09685-6","DOIUrl":"10.1186/s12903-026-09685-6","url":null,"abstract":"<p><strong>Background: </strong>The zygomatic region is surgically important because its bone architecture and relationships with the infraorbital foramen (IOF), coronoid process (CP), and maxillary sinus (MS) influence anatomical orientation during implant placement, fracture fixation, and osteotomy procedures. However, these structures have generally been evaluated separately, and integrated computed tomography (CT)-based assessment using standardized sutural landmarks remains limited. This study aimed to establish a CT-based morphometric framework for the zygomatic region and evaluate anatomical variation by sex, age, and side.</p><p><strong>Methods: </strong>Paranasal sinus CT examinations of 362 fully dentate adults (184 men and 178 women; 18-85 years) were retrospectively analyzed bilaterally using multiplanar and three-dimensional reconstructions. IOF surface quadrant location and distances from the zygomaticomaxillary suture (ZMS) endpoints, cortical and medullary zygomatic bone thicknesses at a standardized ZMS level, and distances from the zygomaticotemporal suture (ZTS) to the CP and lateral wall of the MS were assessed. Generalized estimating equations, chi-square and Bowker tests, and observer reliability analyses were performed.</p><p><strong>Results: </strong>All seven continuous parameters were greater in men than in women (all p < 0.05). Significant right-left differences were small. Older age was associated with a greater ZMS inferior endpoint-to-IOF distance and with lower anterior and posterior cortical thicknesses. The IOF was predominantly located in A1 (71.8%) and was absent from the lateral quadrants; A3 localization was more frequent in women and younger adults. Progression toward A3 corresponded to increased superior and decreased inferior ZMS endpoint-to-IOF distances (both p < 0.001). Anterior and posterior cortical thicknesses were moderately correlated (ρ = 0.59). Measurements and quadrant classification demonstrated good-to-excellent reliability.</p><p><strong>Conclusions: </strong>Surface-based IOF mapping and standardized sutural measurements provided a reproducible framework integrating IOF localization, regional bone architecture, the CP, and the lateral wall of the MS. These reference values may provide an anatomical reference for CT-based preoperative assessment and planning in zygomatic implant placement, midfacial fracture fixation, and osteotomy procedures.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"26 1","pages":""},"PeriodicalIF":3.8,"publicationDate":"2026-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13584542/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148987868","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 efficacy of fascia lata allograft, platelet-rich fibrin, and connective tissue graft for peri-implant soft tissue augmentation: a randomized controlled clinical trial.","authors":"Ahmed Mohamed Elhadidy, Hala H Hazzaa, Ahmed Mohamed Ali Elgendy, Enas Ahmed Elgendy","doi":"10.1186/s12903-026-09589-5","DOIUrl":"10.1186/s12903-026-09589-5","url":null,"abstract":"<p><strong>Background: </strong>Adequate peri-implant soft tissue thickness and keratinized mucosa width are crucial for implant health and aesthetics. Autogenous subepithelial connective tissue grafts (CTG) are the gold-standard for augmenting thin biotypes, but they require a second surgical site. This trial evaluated whether a human fascia lata allograft (FLA) or platelet-rich fibrin (PRF) membrane could comparably enhance peri-implant soft tissue phenotype and serve as less invasive alternatives of CTG.</p><p><strong>Methods: </strong>Forty-five patients with a thin gingival phenotype (≤ 1 mm thickness) requiring upper anterior implant were randomly assigned to receive soft tissue augmentation with either (1) FLA allograft, (2) PRF membrane, or (3) CTG (control). Interventions were applied concurrently with implant placement in a standardized manner. Gingival thickness (GT) and keratinized tissue width (KTW) were measured at baseline and 6 months using transgingival probing and clinical indices. Labial bone thickness was assessed by cone-beam CT at implant placement and 6 months.</p><p><strong>Results: </strong>Forty-five enrolled patients completed the study. All treatment modalities showed improvements in gingival and bone parameters, with the connective tissue graft consistently demonstrating the greatest gains. The median keratinized tissue width increased to 4.00 mm in the Connective Tissue Graft group, slightly higher than the Fascial Lata Allograft and Platelet-Rich Fibrin groups (3.75 mm). Gingival thickness showed significant increases in all groups, with the Connective Tissue Graft reaching 2.15 mm, followed by Fascia Lata Allograft (1.80 mm) and Platelet-Rich Fibrin (1.55 mm). Labial bone thickness also increased, with the Connective Tissue Graft achieving the highest mean value of 2.300 mm, and after 6 months, significant gains were observed in both this group (p = 0.032) and in the Platelet-Rich Fibrin group (p = 0.044), while Fascia Lata Allograft showed a smaller, non-significant increase.</p><p><strong>Conclusions: </strong>Both fascia lata allograft (FLA) and PRF improved peri-implant soft tissue parameters, however the connective tissue graft (CTG) remains the gold standard for achieving the greatest thickness and best aesthetic results. FLA is a promising alternative that avoids a second surgical site with comparable outcomes, whereas PRF offers faster healing but lacks the volume necessary for significant tissue modification.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"26 1","pages":""},"PeriodicalIF":3.8,"publicationDate":"2026-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13491690/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148787964","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":"Removal of overextended root canal filling beyond the apex in lower premolar teeth using two different retreatment rotary files versus manual files: a comparative in vitro study.","authors":"Khadijah Ahmed Sadek, Sybel Mokhtar Mahmoud Moussa, Ahmed Mostafa Mobarak","doi":"10.1186/s12903-026-09571-1","DOIUrl":"10.1186/s12903-026-09571-1","url":null,"abstract":"<p><strong>Background: </strong>The aim of the study was to compare the time required for complete removal of overextended root canal filling in lower premolar teeth using two different rotary file systems; ProTaper Universal Retreatment (PTUR) system, XP-endo Retreatment (XPER) system versus manual Hedstrom (H-Files).</p><p><strong>Methods: </strong>Thirty-six extracted permanent mandibular premolars with single canal were set to a standard length of 19 mm and prepared beyond the apical foramen by 3 mm up to F2 file of the ProTaper Gold system. Overextended obturation was performed by a size (25/08) gutta-percha and AH-Plus sealer using cold lateral condensation technique. Teeth were left for 7 days to ensure complete setting of sealer, then divided into 3 groups (n = 12) according to the gutta-percha removal method (Group Ι: H-Files, Group ΙΙ: PTUR, Group ΙΙΙ: XPER (XP-endo Shaper (XPES) + XP-endo Finisher R (XPEF-R)). Time taken was recorded and statistically analyzed.</p><p><strong>Results: </strong>The XPER technique showed a statistically significant reduction in the time taken to remove the overextended gutta-percha compared to H-files and PTUR groups (P < .05), with the XPER group showing the shortest time, followed by PTUR, and then H-files.</p><p><strong>Conclusions: </strong>XPER technique was significantly faster in removing the experimentally overextended gutta-percha than H-files and PTUR files, demonstrating superior procedural time efficiency.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"26 1","pages":""},"PeriodicalIF":3.8,"publicationDate":"2026-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13491752/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148788078","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 third molar agenesis and sagittal skeletal discrepancies in an orthodontic patient population.","authors":"Philipp Schnegelsberg, Nikola Sophie Ortner, Peter Proff, Svenja Beisel-Memmert, Theodosia Bartzela, Eva Paddenberg-Schubert, Erika Calvano Küchler, Christian Kirschneck","doi":"10.1186/s12903-026-09539-1","DOIUrl":"10.1186/s12903-026-09539-1","url":null,"abstract":"<p><strong>Background: </strong>Previous studies have reported differences in the prevalence of tooth agenesis according to sagittal skeletal discrepancies, while third molars have often not been considered. The aim of the present study was to investigate the association between third molar agenesis and sagittal skeletal discrepancies.</p><p><strong>Methods: </strong>This cross-sectional study comprised 484 orthodontic patients. Pre-orthodontic lateral cephalometric radiographs were digitally analyzed using OnyxCeph³. SNA, SNB, and ANB angles were determined, and the skeletal classification based on ANB was performed as Class I, Class II, and Class III. In addition, sagittal jaw positions were classified as retrognathic, orthognathic, or prognathic. Third molar agenesis was evaluated on panoramic radiographs. The control group consisted exclusively of individuals with a complete permanent dentition of 32 teeth. Statistical analysis was performed at α = 0.05.</p><p><strong>Results: </strong>A total 244 females and 240 males were included: 216 patients had skeletal Class I malocclusion, 201 had skeletal Class II malocclusion, and 67 had skeletal Class III malocclusion. A total of 117 patients had third molar agenesis. Patients with skeletal Class III malocclusion showed a higher prevalence of third molar agenesis (total) (p = 0.0086) and a higher prevalence of maxillary third molar agenesis (p = 0.0003). The number of missing third molars ranged from 1 to 4, and a statistically significant difference was observed, with patients with skeletal Class III malocclusion showing a higher number of missing third molars compared with patients with skeletal Class II malocclusion (p = 0.0309) and skeletal Class I malocclusion (p = 0.0432). Logistic regression analysis was performed, in which gender and age were included in the model as covariates showed that Skeletal class III malocclusion remained associated with third molar agenesis (p < 0.05).</p><p><strong>Conclusion: </strong>Third molar agenesis was significantly more prevalent in patients with skeletal Class III malocclusion.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"26 1","pages":""},"PeriodicalIF":3.8,"publicationDate":"2026-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13495442/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148787948","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 perceived stress and self-reported halitosis among university students: the mediating role of xerostomia, a cross-sectional study.","authors":"Semra Eser, Özlem Bulantekin Düzalan","doi":"10.1186/s12903-026-09460-7","DOIUrl":"https://doi.org/10.1186/s12903-026-09460-7","url":null,"abstract":"<p><strong>Background: </strong>Halitosis is a common oral health concern with notable psychosocial consequences. Although psychological stress has been linked to various oral conditions, the specific mechanism through which perceived stress contributes to self-reported halitosis remains unclear. This study aimed to determine the prevalence of self-reported halitosis among university students and to evaluate the associations between perceived stress levels, oral hygiene behaviors, xerostomia, and self-reported halitosis, with a particular focus on the potential mediating role of xerostomia.</p><p><strong>Methods: </strong>A cross-sectional study was conducted among 400 students from Çankırı Karatekin University's Faculty of Dentistry and Faculty of Health Sciences, Department of Nursing, using a non probability voluntary response sampling method. Data were collected via a self administered online questionnaire (Google Forms) that included items on demographic characteristics, oral hygiene behaviors, and single item questions on xerostomia and self-reported halitosis. Perceived stress was assessed using the validated Turkish version of the Perceived Stress Scale (PSS-10). Associations were examined using chi square tests and binary logistic regression. The mediating role of xerostomia in the relationship between perceived stress and self-reported halitosis was evaluated through mediation analysis.</p><p><strong>Results: </strong>The prevalence of self-reported daytime halitosis was 18.5%, and 67.8% of participants reported xerostomia. Perceived stress was significantly associated with both self-reported halitosis and xerostomia. Mediation analysis revealed that xerostomia statistically mediated the association between perceived stress and self-reported halitosis (indirect effect = 0.653, 95% bootstrap CI [0.184, 1.122]). Xerostomia was a significant predictor of halitosis (OR = 3.249, 95% CI: 1.647-6.408, p = 0.001). Additionally, self-reported halitosis was significantly associated with brushing frequency, gingival bleeding, and smoking status. Statistically significant differences in perceived stress levels were observed based on gender and faculty of enrollment.</p><p><strong>Conclusions: </strong>Perceived stress is associated with self-reported halitosis among university students, and this association is statistically mediated by xerostomia. These findings suggest that xerostomia may represent a potential mechanism linking perceived stress and self-reported halitosis. Future studies employing larger samples and objective clinical measurements, such as sialometry and volatile sulfur compound analysis, are needed to confirm these associations.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"26 1","pages":""},"PeriodicalIF":3.8,"publicationDate":"2026-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13632209/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149103928","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}