A meta-analysis comparing the 2.0-mm locking plate system with the 2.0-mm nonlocking plate system in treatment of mandible fractures.

PURPOSE: The purpose of this meta-analysis was to evaluate the efficacy of the 2.0-mm locking miniplate/screw system in comparison with the 2.0-mm nonlocking miniplate/screw system in treatment of mandible fractures. METHODS: Articles published until March 2013 were searched in the PubMed and EMBASE electronic databases. Eligible studies were restricted to comparative controlled trials. RESULTS: Four studies with 220 patients and 420 fracture sites were enrolled into the analysis. The results showed that there were no significant differences in overall complications (odds ratio [OR], 0.57; 95% confidence interval [CI], 0.24-1.36; P = 0.21), postoperative infection (OR, 0.43; 95% CI, 0.13-1.41, P = 0.17), and postoperative pain (P > 0.05) when comparing 2.0-mm locking miniplates with 2.0-mm nonlocking miniplates in treating mandible fractures. However, the use of 2.0-mm locking miniplates had a lower postoperative maxillomandibular fixation (MMF) rate than the use of 2.0-mm nonlocking miniplates (OR, 0.18; 95% CI, 0.08-0.41; P < 0.0001). CONCLUSIONS: Mandible fractures treated with 2.0-mm locking miniplates and nonlocking 2.0-mm miniplates present similar short-term complication rates, and the low postoperative maxillomandibular fixation rate of using 2.0-mm locking miniplates also indicates that the 2.0-mm locking miniplate has a promising application in treatment of mandibular fractures.

[Application of research-based learning for bachelor intern students of stomatology].

PURPOSE: To apply research-based learning in education of bachelor intern students of stomatology and evaluate its role in promoting the comprehensive quality of the students. METHODS: Sixty students from grade 2007 and 2008 in school of stomatology, Wenzhou Medical University were enrolled in this study. Thirty of them were randomly selected into a group for research-based learning, while the others were taught with traditional teaching mode. Survey and assessment of the teaching effect was performed after the course. Independent t test was employed to evaluate the differences with SPSS16.0 software package. RESULTS: No significant difference of exam results was revealed between the two groups. Questionnaire survey showed a good evaluation for the teaching mode and the teachers in the group research-based learning, but the evaluation of mastering research capability was lower. CONCLUSIONS: Research-based learning mode promotes the study interest and comprehensive quality of the students. No evidence of interference with mastering clinical skills is disclosed.

[Xeroderma pigmentosum with repeated facial skin carcinogenesis: report of one case].

Xeroderma pigmentosum is a relatively rare pigment atrophic autosomal recessive genetic disease, mainly due to defect of DNA excision repair capacity, resulting in ineffective removal of UV-induced pyrimidine dimers, and finally cell damage. This paper reported a case of xeroderma pigmentosum with recurrent episodes of oral and maxillofacial carcinogenesis, and discussed the etiology, pathology, clinical characteristics, classification, diagnosis and treatment methods of Xeroderma pigmentosum.

[Mandibular condyle ectomy for the treatment of comminuted condylar fracture].

PURPOSE: To investigate the feasibility and indication of condylectomy for treatment of comminuted fractures of the condyle above the neck. METHODS: Sixty-one patients with condylar fractures, treated between September 2007 and September 2011 were reviewed respectively. Among them, 30 underwent open reduction and internal fixation, 15 underwent conservative therapy, and 16 patients (18 sides) who had comminuted fractures of the condyle above the neck underwent condylectomy. All the patients were followed up for 5 to 48 months after treatment to evaluate the outcomes. RESULTS: Among the 16 patients with condylectomy, poor wound healing due to rejection of hemostatic gauze was noted in 1 patient, occlusal deviation occurred in 1 patient, mild mouth opening limitation happened in 1 patient, and anterior open bite was present in 1 patient. The other patients recovered well, without apparent discomfort, malocclusion and facial asymmetry. CONCLUSIONS: For patients with finished maxillofacial growth, condylectomy is a feasible and effective way for management of comminuted fractures of the condyle above the neck. Postoperative occlusal deviation, open bite and limited mouth opening can be corrected with further expectant treatment.

[A prevalence survey of the dental institutions and professionals in Lishui city in 2009].

PURPOSE: To investigate the current status of dental institutions and professionals in Lishui city in 2009. METHODS: The database of dental professionals in various medical institutions in Lishui city in 2009 was obtained from Information Center, Bureau of Health of Lishui city. All the data were input into EpiData 3.1, and SPSS12.0 software package was used for statistical analysis. RESULTS: There were 100 dental institutions in total in Lishui city. Dental clinics accounted for 59% . There were 254 dentists and fewer dental assistants. The ratio of dentist to dental nurse was 8:1. The ratio of dentist to population per 100000 was 10.04. CONCLUSIONS: Strengthening education and training of primary dental professionals and rationalization of the dental professional structure are the keys to improve dental health level and realize social health justice in Lishui city.