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Effect of intended manual condylar positioning on skeletal and dental changes in Skeletal Class III deformities:
Dae-Seok Hwang1, Yong-Il Kim2, Kyung-Min Lee3
1Department of Oral & Maxillofacial Surgery (Head: Prof. D.S. Hwang, PhD), Pusan National University Hospital, Busan, South Korea.
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
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.
