Abstract
The treatment of class II division 1 malocclusion in adult patients is generally carried out with the extraction of two maxillary premolars, in order to retract the anterior teeth so that a change in the inter incisal angle can be obtained so that it can change the facial profile better. The purphose of this research is to evaluate cephalometric changes in inter incisal angle and profile position after orthodontic treatment with extractions of two maxillary premolars and anterior teeth retraction.
The study was conducted on pre and post treatment lateral cephalometric radiographs from 25 patients with Class II division 1 malocclusion were used to evaluate the following measurements inter incisal angle and Holdaway analysis.
The results showed an increased in the inter incisal and a decreased in Holdaway angle measurement. The statistical test using t test shows significant result (p<0,05). Spearman correlation analysis showed there was a correlation between inter incisal angle and Holdaway angle but statistically not significant.
Based on the results of the study, the inter incisal angle increased and the Holdaway angle decreased significantly after retraction of the anterior teeth. There is a correlation between changes in incisal angle and changes in facial profile but not significant.