Abstract:
The objective of this work was to evaluate the influence of the severity of the malocclusion of Class III, the angle of the occlusal plane in different patterns. Material and methods: The sample was composed of 10,000 orthodontic documentation, of which 421 had orthodontic documentation page of good quality, with chest x in lateral norm, models of plaster and panoramic radiography, molar relation Class III of any severity, the presence of all permanent teeth irrompidos until first molar, absence of agenesias and/or embryos that could interfere in the severity of malocclusion, have not been subjected to any orthodontic treatment previously, even if preventive and does not have a history of systemic diseases. These were selected 90 patients presenting with ANB< -10, with different facial patterns, being 40 male and 50 female with an average age of 94.4. Two groups were formed of 30 patients who presented the values more vertical extremes. Group 1A: Standard brachiocephalic, formed by 30 patients, 17 male and 13 female with an average age of 19.9. Group 1B: standard dolichocephalic, formed by 30 patients, 14 male and 16 female with an average age of 0. The rays were entered and scanned into the program DOLPHINIMAGING. The error casual was determined by means of the formula DAHLBERG. To calculate the systematic error was used the t-test dependent. Results: In the brachiocephalic pattern and in dolicefálico the ANB and wits with SN. PlOcl, showed a positive correlation , this means that the more severe the Class III greater rotation of the occlusal plane in a counter-clockwise direction and the p showed statistically significant. Conclusion: After the evaluation of the results and according to the methodology employed, it can be concluded that the greater the severity of malocclusion of Class III skeletal open greater rotation of the occlusal plane in a counter-clockwise direction, regardless of the standards.
