BMC Oral Health最新文献

Background: The early and accurate diagnosis and management of common orofacial conditions is essential for effective dental care. However, junior dentists often lack confidence and practical skills in this area. This study aimed to assess the impact of an educational lecture on dental interns' competency in diagnosing and managing prevalent orofacial diseases.

Methods: This study was conducted among dental interns at King Abdulaziz University, Saudi Arabia. A total of 161 newly graduated interns were invited to participate. An evidence-based, one-hour interactive online lecture involving common orofacial conditions was delivered by a certified oral medicine consultant. Participants completed a validated 40-item questionnaire at three time points: before the lecture, immediately after the lecture, and two months after the lecture. The questionnaire was designed to assess diagnostic and management skills using 20 clinical scenarios. Diagnostic competency score was based on the percentage of correct responses to 20 diagnostic multiple-choice questions (MCQs), and a management competency score was based on the percentage of correct responses to 20 management MCQs. Descriptive statistics and weighted kappa analyses were conducted by employing SPSS^®, with significance set at p < 0.05.

Results: Among the 161 participants, 91 interns (56.5%) completed all the stages. Following the intervention, overall competency scores significantly increased (from 78% at baseline to 91% immediately after the lecture), with a relative improvement of approximately 13% being observed (p < 0.001); moreover, the scores remained 8.5% higher than those at baseline at the two-month evaluation. Diagnostic accuracy demonstrated a notable improvement of 12.5% (p < 0.001) following the intervention and remained higher than baseline at follow-up. The greatest improvement in the diagnosis was observed for herpes labialis (+ 53.1%), irritational fibroma (+ 32.1%), and leukoedema/morsicatio buccarum (+ 20%). Management competency improved by 13.5% (p < 0.001) immediately after the lecture, followed by a decrease of 6% at the two-month follow-up. The greatest improvement was observed in the management of recurrent aphthous stomatitis (+ 36.6%). No significant differences were observed in terms of sex or grade point average (GPA).

Conclusion: The educational lecture significantly enhanced the ability of dental interns to diagnose and manage common orofacial conditions. Given the importance of timely diagnosis and appropriate management in reducing the severity of common oral lesions, the findings of this study provide valuable insights. The results suggest that such targeted educational interventions should be integrated into continuing dental education programs to enhance clinical competence among practitioners.

Background: This study aimed to evaluate the effect of incorporating different concentrations of nanochitosan (NCH) into Fuji Plus resin-modified glass ionomer luting cement (RMGIC; GC Corporation, Tokyo, Japan) on shear bond strength, film thickness, solubility, water sorption, and antibacterial activity.

Methods: The liquid component of fuji Plus RMGIC was modified by incorporating NCH at 0% (control), 5%, 10%, and 20% (v/v). A total of ten specimens were prepared per group for each test. Shear bond strength (SBS) was assessed using human mid-coronal dentine after thermocycling. Film thickness was measured in accordance with ISO 4049 and ANSI/ADA guidelines. Water sorption and solubility were assessed after 28 days in artificial saliva. Antibacterial activity against Streptococcus mutans was determined via the agar disc diffusion method. Data were analyzed using one-way ANOVA followed by Tukey's post hoc test (α = 0.05).

Results: NCH incorporation significantly influenced the tested properties of RMGIC. Bond strength remained unaffected at 5% and 10% but significantly decreased at 20% (p ≤ 0.05). Film thickness increased only at 20% (p ≤ 0.05). Water sorption showed a concentration-dependent increase, while solubility significantly decreased with increasing NCH content (p < 0.0001). Antibacterial activity against Streptococcus mutans improved significantly with higher NCH concentrations, as evidenced by larger inhibition zones in all modified groups compared to the control (p < 0.0001).

Conclusions: Incorporation of NCH into RMGIC enhanced its antibacterial activity and reduced solubility without compromising bond strength or film thickness up to 10%. However, a 20% addition adversely affected the mechanical and handling properties.

Objective: To investigate the condylar joint space, position and morphology in skeletal Class II malocclusion patients with idiopathic condylar resorption (ICR), in order to provide reference for the clinical treatment and efficacy evaluation of ICR.

Materials and methods: Skeletal Class II malocclusion patients with ICR and skeletal Class II malocclusion patients with normal temporomandibular joint (TMJ) structure were included in this study. The anterior joint space (AJS), superior joint space (SJS) and posterior joint space (PJS) were measured by computed tomography (CT) and magnetic resonance imaging (MRI). The surface area and volume of condyle were measured through three-dimensional reconstruction using CT scans.

Results: A total of 55 patients were included in both groups. All ICR patients exhibited bilateral anterior disc displacement without reduction (ADDWOR), with MRI revealing morphological changes in 90.91% of ICR patients. SJS in ICR group significantly decreased by 15.85% on CT and 14.23% on MRI (P<0.05). The typical SJS-PJS difference in healthy TMJs disappeared in ICR patients, and joint space proportions became irregular, indicating condylar instability. Mild resorption was found in 78.18% of ICR patients, mainly affecting the anterior slope and condylar apex, while 21.82% showed more severe resorption. Condylar ratio in ICR patients showed greater variability, reflecting increased instability. Additionally, condylar volume and surface area were significantly reduced by 29.9% and 21.3%, respectively (P<0.05).

Conclusion: ICR patients show varying levels of condylar resorption and less consistent joint space proportions. These findings may reveal the influence of resorptive morphological changes on the stability of condylar position within the glenoid fossa.

Trial registration: This study was registered at the Chinese Clinical Trial Registry (ChiCTR2100051867) on October 8, 2021.