Article ID Journal Published Year Pages File Type
3125287 British Journal of Oral and Maxillofacial Surgery 2009 4 Pages PDF
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 −0.07 mm (95% confidence intervals (CIs) −0.17 to 0.04 mm) for the vertical movement and 0.12 mm (95% CI −0.06 to 0.30 mm) 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.

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Health Sciences Medicine and Dentistry Dentistry, Oral Surgery and Medicine
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