Abstract
We aimed to compare the postoperative stability of conventional bimaxillary surgery
(with bilateral sagittal split osteotomy) with that of maxillary impaction surgery
(with mandibular autorotation without bilateral sagittal split osteotomy) in patients
with skeletal class II retrognathia. Patients were assigned to have conventional bimaxillary
surgery (conventional group, n = 6) or mandibular autorotation (experimental group, n = 7). Measurements were made using serial lateral cephalometric radiographs taken immediately
preoperatively (T0), immediately postoperatively (T1), and one year later (T2) to
assess the variation in operative change (T1-T0) and relapse (T2-T1). There was no
significant difference in median (range) surgical change in the anterior movement
at point B (conventional group, 4.5 (3.0–11.0) mm; experimental group 4.1 (2.1–6.4)
mm). However, there was a significant difference in median (range) surgical posterior
movement relapse at point B (conventional group −1.7 (−2.3 to −0.5) mm; experimental
group −0.6 (−1.0 to 1.0) mm; p = 0.032). Mandibular advancement with mandibular autorotation is therefore a more stable
procedure than mandibular advancement with bilateral sagittal split osteotomy in patients
with skeletal class II retrognathia.
Keywords
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Article info
Publication history
Published online: November 09, 2019
Accepted:
October 16,
2019
Identification
Copyright
© 2019 The British Association of Oral and Maxillofacial Surgeons. Published by Elsevier Ltd. All rights reserved.
