Stability Of Two-Jaw Surgery And Single Mandibular Surgery In Mandibular Prognathism

ABSTRACT

6months); were analyzed by linear measurement to evaluate changes in position (hard tissue B, Pogonion point)and compare relapse both group.The results obtained were as follows ; In view of B-point, the horizontal relapse rate of single mandibular surgery was 10.17%at post-op 1month,12.52%at post-op 3months,13.01%at post-op 6months and two-jaw surgery was 10.23%at post-op 1month,11.84% at post-op 3months,12.97%at post-op 6months. the horizontal relapse rates of Pogonion point were 10.78% at post-op 1month,12.21% at post-op 3months,12.98%at post-op 6months in single mandibular surgery and those were 10.27%at post-op 1month,11.33% at post-op 3months, 12.01%at post-op 6months in two-jaw surgery. In terms of vertical relapse rate, rates of B point were 22.96%at post-op 1month,28.30%at post-op 3months,29.56%at post-op 6months in single mandibular surgery and 21.14%at post-op 1month, 25.45% at post-op 3months,28.86% at post-op 6months in two-jaw surgery.Those of Pogonion point were 26.63%at post-op 1month,28.40% at post-op 3months,29.29% at post-op 6months in single mandibular surgery and 20.20%at post-op 1 month, 25.44% at post-op 3 months, 27.68% at post-op 6months in two-jaw surgery. There were no statistical difference between single mandibular surgery and two-jaw surgery in mandibular stability.