ABSTRACT
OBJECTIVE@#We aim to examine teenagers with varying vertical facial skeletal types with near-normal occlusion. We further aim to identify and study mandibular morphology and dentition characteristics to establish normal ranges and variations for future clinical reference.@*METHODS@#According to the results of the case studies, 42 adolescents with near-normal occlusion were divided into three groups, namely, low- (7 cases), average- (23 cases) and high-angle (12 cases) groups. We used Invivo 5 software for Digital Imaging and Communications in Medicine (DICOM) data to calculate the cant of occlusal plane, axis corner of L6, ∠L1/MP, ∠L6/MP, Balkwill angle and Bonwill triangle of each group.@*RESULTS@#Markedly, the finding shows that the cant of occlusal plane and axis corner of L6 in the low-angle group were smaller than those of the other two groups. In the average-angle group, ∠L1/MP was larger than that of the high-angle group. Lastly, in the high-angle group, ∠L6/MP was smaller than those of the two other groups. On the one hand, these differences were considered statistically significant (P0.05).@*CONCLUSIONS@#In the low-angle group, the parallelisation of the occlusal plane tends to be more obvious compared with the two other groups. In the coronal section of the low-angle group, the axis of the mandibular first molar is up-right, whereas it is distally tilted in the sagittal section of the high-angle group. Furthermore, a number of differences are noted in the adult groups. Factors, such as aging and development in the craniofacial region, lead to changes in functional occlusion.
Subject(s)
Adolescent , Humans , Cephalometry , Dental Occlusion , Dentition , Mandible , ToothABSTRACT
Objective To explore the effects and complication treatments of microwave ablation(MWA) for benign thyroid nodules.Methods The clinical data of 74 patients with benign thyroid nodules treated with MWA in our department from June 2014 to May 2015 were collected and studied retrospectively.Furthermore,the effects and complication treatments were analyzed and calculated.Results A total of 93 nodules were treated with MWA,of which 46 were the main nodules,cystic 47;7 nodules' ablation were not complete,the complete ablation rate was 92.47％.The postoperative reduction of volume in cystic nodules were significantly higher than solid nodules,and the number of solid nodules decreased more rapidly postoperation.The untreated cystic nodules developed a certain degree of growth after 6 months of surgery.After treatment,the TSH of solid nodules were obviously higher,the FT3 and FT4 were much lower than those before treatment and cystic nodules(P ＜ 0.05).A total of 17 cases of complications occurred in the positive symptomatic treatment,all cases were cured within a few days,there was no serious complications.Conclusion Microwave ablation has a high ablation rate in the treatment of thyroid benign nodules,the ablation effects are different between solid and cystic nodules;early and targeted measures can effectively prevent and deal with surgical complication.