This study was performed to evaluate whether growth prediction method can be used to diagnose and make treatment plan in skeletal Class III malocclusion patients or not The sample was consisted of 25 patients(13 males, 12 females) who had been diagnosed with skeletal Class III malocclusion at first visit and after that had returned to take orthognathic surgery. Growth prediction performed with Ricketts´ growth´ prediction method from first cephalogram was compared with actual growth of the second cephalogram.
The findings of this study were as follows ;
1. There was significant difference between actual growth and growth prediction in Potion Location, Ramus Position, Facial Depth, Facial Axis, Mandibular Plane angle, Maxillary Convexity. So, for these items Ricketts´ growth prediction method is not proper to predict growth.
2. Although the growth amount of mandibular body was similar to normal growth amount, mandible was positioned anteriorly because-of Potion Location and Ramus Position.
3. In skeletal Class III malocclusion patients, the tendency of mandibular prognatbism might be aggreviated because. of anterior placement of rarnus and anterosuperior rotation of pogonion.
|