Accuracy of maxillary positioning in bimaxillary surgery

Kretschmer, W.B.; Zoder, W.; Baciut, G.; Bacuit, Mihaela; Wangerin, K.

doi:10.1016/j.bjoms.2009.06.004

« Previous Next »British Journal of Oral and Maxillofacial Surgery
Volume 47, Issue 6 , Pages 446-449, September 2009

Accuracy of maxillary positioning in bimaxillary surgery

W.B. Kretschmer
- Department of Oral and Maxillofacial Surgery, Marienhospital, Stuttgart, Germany
- Clinic of Cranio-Maxillofacial Surgery, University of Medicine and Pharmacy, Cluj-Napoca, Romania
- Corresponding author at: Department of Oral and Maxillofacial Surgery, Marienhospital Stuttgart, Boeheimstr. 37, 70199 Stuttgart, Germany. Tel.: +49 711 6489 8261; fax: +49 711 6489 8262.
W. Zoder
- Department of Oral and Maxillofacial Surgery, Marienhospital, Stuttgart, Germany
G. Baciut
- Clinic of Cranio-Maxillofacial Surgery, University of Medicine and Pharmacy, Cluj-Napoca, Romania
Mihaela Bacuit
- Clinic of Cranio-Maxillofacial Surgery, University of Medicine and Pharmacy, Cluj-Napoca, Romania
K. Wangerin
- Department of Oral and Maxillofacial Surgery, Marienhospital, Stuttgart, Germany

Accepted 8 June 2009. published online 08 July 2009.

Abstract

The aim of the study was to investigate the accuracy of a modified pin system for the vertical control of maxillary repositioning in bimaxillary osteotomies. The preoperative cephalograms of 239 consecutive patients who were to have bimaxillary osteotomies were superimposed on the postoperative films. Planned and observed vertical and horizontal movements of the upper incisor were analysed statistically. The mean deviations of −0.07mm (95% confidence intervals (CIs) −0.17 to 0.04mm) for the vertical movement and 0.12mm (95% CI −0.06 to 0.30mm) for the horizontal movement did not differ significantly from zero. Comparison of the two variances between intrusion and extrusion of the maxilla did not differ significantly either (p=0.51). These results suggest that the modified pin system for vertical control combined with interocclusal splints provides accurate vertical positioning of the anterior maxilla in orthognathic surgery.