COMPARATIVE STUDY
JOURNAL ARTICLE

Effect of intended manual condylar positioning on skeletal and dental changes in Skeletal Class III deformities: CBCT-generated half-cephalograms

Dae-Seok Hwang, Yong-Il Kim, Kyung-Min Lee
Journal of Cranio-maxillo-facial Surgery 2014, 42 (1): 7-12
23434240

INTRODUCTION: To investigate the effect of intended manual condylar positioning on skeletal changes from preoperative stage to posttreatment stage.

MATERIALS AND METHODS: The sample comprised 23 patients divided into two groups according to surgery type: mandible-only setback surgery (group I) versus 2-jaw surgery (group II). CBCT-generated Half-Cephalograms were fabricated to evaluate the skeletal, dental, and condylar positioning changes for each subject at three time points (preoperatively (T0), immediate-postoperatively (T1), and posttreatment (T2)).

RESULTS: The angle of the proximal segment in group II was reduced immediate-postoperatively. In both groups, the result showed a negative mean value for the horizontal mandibular position (B point to N-perpendicular plane at T2-T1 stage). In group II, the vertical mandibular position (B point to FH plane at T2-T1 stage) also had a negative mean value. In group I, the change of the B point to N-perpendicular plane (T2-T1) had statistically significant correlations with the change of the Cd to Po-perpendicular plane (T2-T1). In group II, the change of the B point to the N-perpendicular plane (T2-T1) had statistically significant correlations with the change of the <Cd-Cp-FH plane angle (T2-T1) and the Cp to FH plane (T1-T0).

CONCLUSIONS: In this study, the change from the T1 to T2 stage, though not statistically significant, showed a negative short-term relapse. Intended manual condylar positioning may suppress the short-term skeletal relapse.

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