ABSTRACT
OBJECTIVE: The present study aimed to determine from a sample of Amazonian youngsters, with normal occlusion, the mean values for soft profile characteristics using cephalometric radiographs obtained in lateral norm. METHODS: The cephalometric radiographs of the 30 youngsters, being 15 males and 15 females, with mean age of 21.6 years old, were assessed. For statistical analysis, central tendencies and dispersion measurements (mean and standard deviation) were used and, for both the comparison of the mean values of males and females and the correlations between the measurements of the soft profile and bony profile, the unpaired Student's t-test was applied. RESULTS AND CONCLUSION: After obtaining statistical data, parameters were set based on the cephalometric norms regarding the specialized literature, revealing that all variables presented a normal distribution pattern. There was sexual dimorphism for the following measurements: ANB, NAP, ANS-Me, N-ANS, Sn'-Me', and N'-SN'. Norms were determined for all the assessed measurements. Statistical differences were observed between the norm found in the present study and those found in the specialized literature.
ABSTRACT
Objective To assess the relationship between position of incisor and soft tissues changes in class Ⅲ malocclusion cases after orthodontic treatment.Methods All 26 patients in this study were diagnosed as skeletal class Ⅲ malocclusion.The lateral X-ray cephalometric films taken at the beginning and the end of the treatment were analyzed for position of incisor and soft tissues changes.Statistical analysis Waft performed using SAS v8.0 software.Resuits There was correlation between the labial inelination of upper and lower incisors and the soft tissue profile.Conclusion Soft tissue will be harmonious by the labial inclination increase of the upper incisor teeth and reduction of the lower incisor teeth.