BMC Oral Health最新文献

{"title":"Quantitative analysis and clinical determinants of orthodontically induced root resorption using automated tooth segmentation from CBCT imaging.","authors":"Jiaqi Lin, Qianhan Zheng, Yongjia Wu, Mengqi Zhou, Jiahao Chen, Xiaozhe Wang, Ting Kang, Weifang Zhang, Xuepeng Chen","doi":"10.1186/s12903-025-06052-9","DOIUrl":"https://doi.org/10.1186/s12903-025-06052-9","url":null,"abstract":"<p><strong>Background: </strong>Orthodontically induced root resorption (OIRR) is difficult to assess accurately using traditional 2D imaging due to distortion and low sensitivity. While CBCT offers more precise 3D evaluation, manual segmentation remains labor-intensive and prone to variability. Recent advances in deep learning enable automatic, accurate tooth segmentation from CBCT images. This study applies deep learning and CBCT technology to quantify OIRR and analyze its risk factors, aiming to improve assessment accuracy, efficiency, and clinical decision-making.</p><p><strong>Method: </strong>This study retrospectively analyzed CBCT scans of 108 orthodontic patients to assess OIRR using deep learning-based tooth segmentation and volumetric analysis. Statistical analysis was performed using linear regression to evaluate the influence of patient-related factors. A significance level of p < 0.05 was considered statistically significant.</p><p><strong>Results: </strong>Root volume significantly decreased after orthodontic treatment (p < 0.001). Age, gender, open (deep) bite, severe crowding, and other factors significantly influenced root resorption rates in different tooth positions. Multivariable regression analysis showed these factors can predict root resorption, explaining 3% to 15.4% of the variance.</p><p><strong>Conclusion: </strong>This study applied a deep learning model to accurately assess root volume changes using CBCT, revealing significant root volume reduction after orthodontic treatment. It found that underage patients experienced less root resorption, while factors like anterior open bite and deep overbite influenced resorption in specific teeth, though skeletal pattern, overjet, and underbite were not significant predictors.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"25 1","pages":"694"},"PeriodicalIF":2.6,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12063342/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144062010","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":"Three-dimensional volumetric analysis of bone regeneration following jaw cyst enucleation with and without an autologous albumin gel-platelet-rich fibrin mixture (Alb-PRF): a randomized controlled clinical trial.","authors":"Mohamed Magdy Elsayed Mohamed Shokry, Lydia Nabil Fouad Melek, Tasneem Ahmed Amer","doi":"10.1186/s12903-025-06027-w","DOIUrl":"https://doi.org/10.1186/s12903-025-06027-w","url":null,"abstract":"<p><strong>Introduction: </strong>The presence of an osseous cavity after cyst enucleation is a clinical challenge that needs to be considered. Using pure autologous concentrations of platelets, platelet-rich fibrin (PRF), as a graft material after cyst removal has shown promising effects. However, PRF has limitations in terms of durability, as it usually resorbs within 10-14 days, thus Mourão et al. introduced a new technique for PRF preparation to obtain an albumin gel-platelet-rich fibrin mixture (Alb-PRF), a new autologous material, that can remain stable for 4-6 months with the ability to regenerate bone. This research aimed to evaluate the effect of Alb-PRF on bone regeneration after jaw cyst enucleation via 3-dimensional (3D) volumetric analysis.</p><p><strong>Methods: </strong>Twenty participants, with jaw cysts, were split into two groups. The Alb-PRF group included 10 individuals treated by enucleation and Alb-PRF application, and the control group included 10 individuals treated conventionally by enucleation without any additives. Cone beam computed tomography (CBCT) was conducted immediately following surgery (T1) and six months later (T2) to measure the volume of the residual bone cavity and the mean bone density of the regenerated bone using On-demand 3D viewer. Paired t test was used to compare the postoperative immediate results with the post-6-months results, whereas Student t test was used to compare the Alb-PRF group with the control group.</p><p><strong>Results: </strong>At the 6-month follow-up, the volume of the residual bone cavity had declined and the bone density had increased significantly in both the Alb-PRF group and the control group (P₁ < 0.001) compared with the immediate postoperative values. Although the changes in volume and density were greater in the Alb-PRF group than in the control group, there was no a noticeable difference between the two groups. (P = 0.821) and (P = 0.533), respectively.</p><p><strong>Conclusion: </strong>There was no difference in bone regeneration between Alb-PRF and conventional blood clots after jaw cyst enucleation.</p><p><strong>Trial registration: </strong>The trial was retrospectively registered at the Clinicaltrial.gov registry (Registration ID #NCT05658900). It was first submitted on 12/12/2022 and first posted on 21/12/2022.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"25 1","pages":"693"},"PeriodicalIF":2.6,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12060296/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143975772","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":"Prevalence, etiology and clinical characteristics of gingival recession in a sample of adult Egyptian dental patients: a cross sectional study.","authors":"Susan Sarhan, Enji Ahmed, Radwa R Hussein, Asmaa Abou-Bakr","doi":"10.1186/s12903-025-06020-3","DOIUrl":"https://doi.org/10.1186/s12903-025-06020-3","url":null,"abstract":"<p><strong>Background: </strong>Gingival recession (GR) is a common oral health condition characterized by the exposure of the tooth's root which affects diverse populations worldwide. Thus, this study aimed to analyze data from adult dental patients at the outpatient clinic of the Faculty of Dentistry, Ain Shams University, to assess the prevalence of GR among Egyptian adults and to identify associated risk factors and clinical characteristics.</p><p><strong>Materials and methods: </strong>This study was a cross-sectional study that included 3773 individuals to detect the prevalence, risk factors and clinical characteristics of GR. All participants were examined for presence of GR, and their demographic data was collected by electronic form, while only participants who fulfilled the inclusion criteria were then subjected to a full professional periodontal examination. GR was categorized following the 2018 World Workshop Cairo classification system (RT1, RT2, RT3). The statistical tests used were Kruskal-Wallis and Dunn's post hoc with Bonferroni correction, as well as Fisher's exact test followed by pairwise comparisons using multiple z-tests with Bonferroni correction.</p><p><strong>Results: </strong>Out of 3773 participants only 901 subjects had GR with a prevalence of 23.88%. The prevalence of localized recession (63.93%) was higher than generalized recession (36.07%) with RT1 (43.8%) being the most prevalent followed by RT2 (37.29%), and RT3 (18.87%). The most affected teeth were lower anterior teeth (46.53%) followed by upper left premolars (13.02%), then upper right premolars (11.11%), and upper anterior teeth (10.76%). The prevalence of GR was higher in males (59.6%) more than in females (40.4%), and in smokers (61.49%) more than non-smokers (38.51%). The most common medical conditions were diabetes mellitus and hypertension. Higher severity of the GR was associated with males, middle aged and old age, periodontal diseases, higher plaque and bleeding scores, medical conditions, smoking, and uneducated patients.</p><p><strong>Conclusions: </strong>The prevalence of GR in Egyptians is 23.88% with the most prevalent class of was RT1. Higher severity of the GR was associated with periodontal diseases, higher plaque and bleeding scores, presence of underlying medical conditions and smoking suggesting that regular dental assessments as well as dentists' awareness of the prevention, and treatment of GR has to be increased.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"25 1","pages":"691"},"PeriodicalIF":2.6,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12060494/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143963099","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":"Anxiety and small intestinal bacterial overgrowth: associations with recurrent aphthous ulcers.","authors":"Zijian Liu, Mingxing Lu, Wei Wang, Jingli Tang, Shufang Li, Qianyun Guo, Yutian Wang, Xingyun Liu, Xing Wang, Zhe Cheng, Qian Wang, Jianqiu Jin, Ying Han, Hongwei Liu, Lihong Cui","doi":"10.1186/s12903-025-05998-0","DOIUrl":"https://doi.org/10.1186/s12903-025-05998-0","url":null,"abstract":"<p><strong>Background: </strong>Recurrent aphthous ulcer (RAU) is the most prevalent oral mucosal disease, yet its etiology remains unclear. Anxiety and depression have been linked to the onset of RAU, but research findings were contradictory. The association of intestinal diseases with RAU implies a potential role of gut microbiota in the development of this condition. This study aims to explore the correlation between the presence and severity of RAU and psychological factors, as well as gut microbiota dysbiosis.</p><p><strong>Methods: </strong>The Zung's self-rating anxiety scale (SAS), Zung's self-rating depression scale (SDS), and Pittsburgh sleep quality index (PSQI) were used to assess the participants' psychological status. The lactulose hydrogen-methane breath test was performed to detect the presence of small intestinal bacterial overgrowth (SIBO) in RAU patients. The long-term severity of RAU is quantified using the monthly number of ulcers. Compare the differences in outcomes between individuals with RAU and the healthy population, and explore the factors influencing the severity of RAU.</p><p><strong>Results: </strong>Forty-nine patients and 49 controls were included. The RAU group had significantly higher SAS scores (t = 2.18, p = 0.034), and SIBO positivity (χ² = 75.67, p < 0.001). Factors correlated with the monthly number of ulcers included SAS score (r = 0.52, p < 0.001), symptoms of anxiety (r = 0.42, p = 0.004), SDS score (r = 0.46, p = 0.002), PSQI score (r = 0.35, p = 0.020), and SIBO positivity (r = 0.42, p = 0.005). Multiple linear regression analyses indicated that anxiety and SIBO may influence the severity of RAU. Moreover, SAS score (r = 0.38, p = 0.010) and SDS score (r = 0.38, p = 0.009) exhibited correlations with SIBO.</p><p><strong>Conclusions: </strong>RAU patients are at a higher risk of anxiety and gut microbiota dysbiosis, which could potentially escalate the severity of RAU. The role of the brain-gut axis in the pathogenesis of RAU warrants further exploration.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"25 1","pages":"688"},"PeriodicalIF":2.6,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12057264/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143956836","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":"Lateral periodontal cyst of the anterior maxilla: a rare case report.","authors":"Manoj Adhikari, Kanistika Jha, Aashish Shah, Shova Kunwar, Bishwo Ram Amatya, Junu Bhattarai","doi":"10.1186/s12903-025-06044-9","DOIUrl":"https://doi.org/10.1186/s12903-025-06044-9","url":null,"abstract":"<p><strong>Background: </strong>The lateral periodontal cyst (LPC) is a rare developmental odontogenic cyst, constituting approximately 0.4% of all odontogenic cysts and 0.7% of all jawbone cysts. It is an intraosseous, non-keratinized, non-inflammatory, developmental odontogenic cyst of epithelial origin, typically occurring adjacent to the root of a vital tooth. The lesion usually measures less than one centimeter in diameter. However, in the present case, the lesion was larger, measuring 3.5 × 2.4 × 2.4 cm. Radiographically, LPCs present as unilocular, round, oval or teardrop-shaped radiolucent lesions with a sclerotic border, located laterally to the tooth roots.</p><p><strong>Case presentation: </strong>A 42-year-old female presented to the Oral and Maxillofacial Surgery outpatient department with a chief complaint of swelling on the anterior maxilla for one year. The swelling was asymptomatic, with no associated pain or discomfort. Clinical examination revealed a non-tender, fluctuant swelling on the left side of the anterior maxilla, located between the lateral incisor and canine teeth. A computed tomographic scan confirmed the presence of a lytic lesion on the left side of the anterior maxilla. Surgical enucleation of the cyst was performed through an intraoral crevicular approach under general anesthesia. The excised specimen was sent for histopathological examination. Histopathological examination of the cyst wall revealed a non-keratinized, non-ciliated stratified squamous epithelial lining, ranging from 1 to 5 cell layers in thickness. Interspersed among the epithelial cells were foci of Periodic Acid-Schiff (PAS) positive, glycogen-rich clear cells. Additionally, focal nodular areas of epithelial thickening with a whorled, swirling architecture were observed in continuity with the epithelial lining. The underlying subepithelial connective tissue was fibrous and exhibited a zone of hyalinization. These features were consistent with a diagnosis of lateral periodontal cyst. The healing process was uneventful, and no complications were observed during the one-year follow-up.</p><p><strong>Conclusion: </strong>Although the lateral periodontal cyst is a rare developmental odontogenic cyst, it should be considered in the differential diagnosis of cystic lesions adjacent to the root of a vital tooth. Surgical enucleation remains the treatment of choice, with histopathological examination confirming the diagnosis. Recurrence of lateral periodontal cysts is infrequent.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"25 1","pages":"690"},"PeriodicalIF":2.6,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12060379/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143976272","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":"Tomographic evaluation of apexogenesis with human treated dentin matrix in young permanent molars: a split-mouth randomized controlled clinical trial.","authors":"Nora M Abo Shanady, Nahed A Abo Hamila, Gamal M El Maghraby, Rehab F Ghouraba","doi":"10.1186/s12903-025-05997-1","DOIUrl":"https://doi.org/10.1186/s12903-025-05997-1","url":null,"abstract":"<p><strong>Background: </strong>The concept of vital pulp therapy (VPT) of immature permanent teeth has evolved in recent years. There has been a great tendency towards investigating new pulp capping materials for perfect imitation for natural dentin-pulp complex formation process and restoring the normal tissue's characteristics. Therefore, this study aimed to assess the clinical and tomographic outcomes of apexogenesis with human treated dentin matrix (hTDM) compared to mineral trioxide aggregate (MTA).</p><p><strong>Materials and methods: </strong>40 bilateral deep carious young mandibular first permanent molars (FPMs) in 20 healthy children aged between 6 and 8 years old were randomly allocated into 2 groups in which the FPMs treated with hTDM and MTA after pulpotomy procedure. The children were followed up clinically at 3, 6, 12, and 18 months. Tomographic evaluation was performed at baseline and 18-month evaluation period.</p><p><strong>Results: </strong>The overall clinical success rate was 100% in both groups. Regarding tomographic evaluation, the mean differences in root length, periapical diameter and area were statistically significant in each individual group but without statistically significant differences between both groups.</p><p><strong>Conclusion: </strong>Human TDM hydrogel could be considered a promising pulpotomy agent for immature permanent teeth.</p><p><strong>Trial registration: </strong>The current clinical trial was recorded at clinicaltrials.gov, NCT06116695, 27/10/2023, Retrospectively registered.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"25 1","pages":"692"},"PeriodicalIF":2.6,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12060315/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143978109","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 impact of AI-generated educational content on patient understanding and anxiety in endodontics and restorative dentistry: a comparative study.","authors":"Shahid Islam","doi":"10.1186/s12903-025-06069-0","DOIUrl":"https://doi.org/10.1186/s12903-025-06069-0","url":null,"abstract":"<p><strong>Background: </strong>Effective patient education is critical in enhancing treatment outcomes and reducing anxiety in dental procedures. This study compares the effectiveness of AI-generated educational materials with traditional methods in improving patient comprehension and reducing anxiety during endodontic and restorative dental treatments.</p><p><strong>Methods: </strong>A cross-sectional, comparative study was conducted with 100 participants undergoing restorative or endodontic procedures. Patients were randomized into two groups: those receiving AI-generated instructional materials (via ChatGPT) and those receiving traditional education (verbal explanations and pamphlets). Baseline knowledge and post-intervention knowledge retention were assessed using structured tests. Patient perceptions of clarity, usefulness, comprehensiveness, trust, and anxiety were measured using Likert-scale surveys. Three dental experts evaluated the educational content for accuracy and suitability. Statistical analysis included t-tests and Cohen's kappa to measure inter-rater reliability.</p><p><strong>Results: </strong>AI-generated materials significantly outperformed traditional methods in all measured dimensions, including clarity (4.42 vs. 3.25), usefulness (4.63 vs. 3.50), comprehensiveness (4.50 vs. 3.29), trust (4.00 vs. 2.96), and anxiety reduction (mean anxiety score: 2.63 vs. 3.38, p < 0.001). Pre- and post-intervention knowledge assessments revealed substantial knowledge improvement in the AI group. Expert evaluations confirmed the accuracy and suitability of AI-generated materials, with high inter-rater reliability (κ = 0.75, p < 0.001).</p><p><strong>Conclusions: </strong>AI-generated educational materials demonstrate superior effectiveness in improving patient comprehension and reducing anxiety compared to traditional methods. Their integration into dental practice could enhance patient satisfaction and streamline the educational process, particularly for complex or anxiety-inducing procedures. Future research should explore their application in diverse dental specialties and assess long-term impacts on patient behavior and clinical outcomes.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"25 1","pages":"689"},"PeriodicalIF":2.6,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12060393/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143969349","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":"Physical and drug- releasing properties of a cement containing simvastatin (SimCeram).","authors":"Iman Parisay, Morva Moodi, Marzieh Boskabady, Hossein Bagheri, Roshanak Salari, Melika Hoseinzadeh","doi":"10.1186/s12903-025-06045-8","DOIUrl":"https://doi.org/10.1186/s12903-025-06045-8","url":null,"abstract":"<p><strong>Background: </strong>This in vitro study compared the physical characteristics and drug release patterns of a bioactive cement containing with 0.1 μM Simvastatin (SimCeram) with mineral trioxide aggregate (MTA; Angelus, Brazil).</p><p><strong>Methods: </strong>SimCeram, a calcium silicate-based cement was prepared with the powder composition of 25 wt% silicon-doped hydroxyapatite, 25 wt% strontium-doped hydroxyapatite, and 50 wt% tricalcium silicate/dicalcium silicate. SimCeram liquid contained 0.1 μM dissolved in distilled water. After preparing SimCeram and MTA, the initial setting time of cements was determined with a Gillmore needle. Compressive strength was measured at 1 h, 1 day, and 1 week using a Universal Testing Machine. Cement solubility was assessed according to ISO 6876 after one day, two, and four weeks. Calcium ion release was measured with an ICP-AES device, and simvastatin release was also examined using a UV-spectrophotometer at 238 nm.</p><p><strong>Results: </strong>MTA setting time was significantly shorter (12.33 ± 0.57 min) compared to SimCeram (36.33 ± 1.15 min; P < 0.001). MTA exhibited significantly higher compressive strength than SimCeram after 1 h and 1 day (P < 0.05). However, after 1 week, the compressive strength of SimCeram (10.82 ± 1.93 MPa) surpassed that of MTA (6.79 ± 3.24 MPa; P = 0.009). SimCeram showed greater calcium ion release and solubility throughout all time points tested compared to MTA (P < 0.05). Simvastatin release demonstrated an initial burst after 1 h and reached a plateau after 24 h.</p><p><strong>Conclusion: </strong>SimCeram showed higher compressive strength and calcium release compared to MTA. Given simvastatin's beneficial properties-such as anti-inflammatory effects, angiogenesis promotion, and the ability to induce differentiation of dental pulp stem cells-along with the significant calcium ion release from the calcium silicate-based component of the cement, SimCeram could be a promising material for vital pulp therapy.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"25 1","pages":"684"},"PeriodicalIF":2.6,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12051323/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143963696","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 staining techniques and repeated firing cycles on translucency, color and biaxial flexural strength of advanced lithium disilicate containing Virgilite crystals.","authors":"Nadine I Rizkallah, Ghada Abdelfatah, Marwa M Wahsh, Hoda M Abdel Sadek","doi":"10.1186/s12903-025-06011-4","DOIUrl":"https://doi.org/10.1186/s12903-025-06011-4","url":null,"abstract":"<p><strong>Background: </strong>The repeated firings can enhance shade matching, translucency, and strength; however, they may also lead to color shifts. Previous research suggests that multiple firings enhance these properties to a certain extent; however, the impact of staining techniques remains underexplored. The aim of this study is to investigate the effect of staining techniques and multiple firings on the translucency, color and biaxial flexural strength of advanced lithium disilicate ALD containing Virgilite crystals.</p><p><strong>Methods: </strong>Sixty-three discs of ALD (CEREC Tessera^®) were divided into 3 groups based on staining techniques (n = 21); group CO (glaze only), group SC (single-step characterization), and group DC (double-step characterization). The discs were then subjected to either 2, 4, or 6 firing cycles, resulting in 9 groups (n = 7): COII, COIV, COVI, SCII, SCVI, DCII, DCIV, and DCVI. Relative translucency parameter (RTP), color change (ΔE), and biaxial flexural strength were measured, then discs were analyzed using SEM. Data were statistically analyzed using ANOVA, Bonferroni correction, and Spearman's correlation (α = 0.05).</p><p><strong>Results: </strong>Repeated firing and staining techniques significantly affected translucency, color change, and biaxial flexural strength (p < 0.001). Translucency increased with firings, highest in CO and lowest in DC. ΔE increased with firings, highest for DC and lowest in CO. The biaxial flexural strength of the CO group remained stable across firing cycles, with no significant changes. The SC group, initially the weakest, showed a significant increase, reaching its peak after six cycles. The DC group had high strength in the fourth cycle, with a significant difference observed between the second and fourth cycles. By the sixth cycle, all groups showed comparable strength with no significant differences.</p><p><strong>Conclusions: </strong>Within the limitation of this study, firing cycles and staining techniques impact the properties of ALD. More firing cycles enhance translucency but increase color change. Repeated firing, particularly with the double-step characterization technique, significantly improved biaxial flexural strength up to the fourth cycle, demonstrating its superior performance over the single-step characterization technique.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"25 1","pages":"685"},"PeriodicalIF":2.6,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12054244/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143963695","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":"An index system for the clinical supervision of clear aligner in extraction patients based on the Delphi method and the analytic hierarchy process.","authors":"Yanning Ma, Xulin Liu, Yuxun Cheng, Ruoyan Zhang, Xu Zhang, Mingxin Zhang, Jie Gao, Zuolin Jin","doi":"10.1186/s12903-025-05739-3","DOIUrl":"https://doi.org/10.1186/s12903-025-05739-3","url":null,"abstract":"<p><strong>Background: </strong>Clinical supervision of clear aligner treatment in extraction patients is essential during the long process of follow-up period. However, there is insufficient clinical guidance available to define the key points of a standard examination for clinical supervision.</p><p><strong>Methods: </strong>An initial index system was constructed based on a comprehensive literature review. The final indexes to be used in the system were determined through Delphi process. Weightings for the final index system were determined using the Analytic Hierarchy Process (AHP), which required the development of a judgment matrix to assess the relative significance of each index through pairwise comparisons.</p><p><strong>Results: </strong>A tiered indexing system was created, consisting of two primary indexes, 10 secondary indexes, and 30 tertiary indexes. The expert authority coefficient (Cr) was 0.89 for the first round of consultation and 0.91 for the second round. The weighting values for the first-level indexes 'tooth movement' and 'dentofacial health' were 0.38215 and 0.61785, respectively, thus indicating that dentofacial health holds greater importance.</p><p><strong>Conclusions: </strong>We integrated both qualitative and quantitative analyses to establish a novel index system for clinical supervision of clear aligner treatment in extraction patients to reduce the incidence of complications.</p>","PeriodicalId":9072,"journal":{"name":"BMC Oral Health","volume":"25 1","pages":"687"},"PeriodicalIF":2.6,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12054293/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143960906","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}