Authors : Raghav P, Singh S, Khera A, Kumar A, Sagar A
DOI : 10.18231/j.jco.2018.004
Volume : 2
Issue : 1
Year : 2018
Page No : 24-29
Objective: To compare the position of condyle in Skeletal Class II Division 2 patients between pre- and post-alignment and leveling phase and to formulate a list of variables which may help in predicting the favorable prognosis in treatment planning of this malocclusion.
Materials and Methods: Serial Lateral cephalograms of 25 subjects of Skeletal class II, Division 2 malocclusion were taken in natural head position. Software Nemoceph Nx-2009 was used to make all the tracings and measurements. All subjects were treated by non-extraction orthodontic therapy, were analyzed at two point of times i.e., pre-treatment and post-leveling and alignment. Fifteen landmarks were identified, angular and linear measurements were analyzed (17 skeletal and 5 dental) in both vertical and horizontal plane.
Results: Glenoid Fossa/Condyle, showed a statistically significant forward movement from the vertical plane, a statistically significant difference was seen, in all the four linear variables, i.e., overbite, ANS-Me, S-Go and Co-Go. In the angular measurements, statistically significant difference was observed in interincisal angle, I-Pal Plane and LI-M and Plane. In 36% of the subjects, post-alignment and leveling phase mandible was found to be more anteriorly repositioned in the glenoid fossa.
Conclusions: 1) There was a definite unlocking of the mandible in 36% of the subjects. 2) There was a statistically significant increase in the horizontal anterior reposition of the mandible in the glenoid fossa.
Keywords: Class II div 2 Malocclusion