Transverse maxillary and mandibular growth during and after bionator therapy: study with metallic implants.

INTRODUCTION This study evaluated posteroanterior cephalograms before and after treatment and long term follow-up of Class II division 1 patients treated with bionator. OBJECTIVE The objective was to demonstrate the transverse growth of maxilla and mandible during and after bionator therapy. METHODS Measurement of transverse dimensions between posterior maxillary and mandibular implants, as well as the distances between the buccal, gonial and antegonial points were recorded. Measurements were analyzed at three periods: T1 - before bionator therapy, T2 - after bionator therapy and T3 - 5.74 years after T2. RESULTS There was statistically significant transverse increase due to growth and/or treatment for all variables, except for the distance between the anterior maxillary implants. CONCLUSIONS During the study period only the anterior maxillary area did not show transverse growth.