Journal Article

Soft and hard tissue changes in class III patients treated by bimaxillary surgery

S-S Lin and WJS Kerr

in The European Journal of Orthodontics

Published on behalf of European Orthodontics Society

Volume 20, issue 1, pages 25-33
Published in print February 1998 | ISSN: 0141-5387
Published online February 1998 | e-ISSN: 1460-2210 | DOI: http://dx.doi.org/10.1093/ejo/20.1.25
Soft and hard tissue changes in class III patients treated by bimaxillary surgery

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A cephalometric study of 17 non-growing dentate class III subjects treated by bimaxillary surgery was undertaken to assess the results of treatment and to evaluate the correlation between soft and hard tissue change. It was concluded that: (i) the orthognathic profiles achieved ware brought about by a combination of maxillary advancement and mandibular setback: (ii) a strong correlation in the horizontal direction occurred between all the selected landmarks of the lower lip and chin, but only between superior labial sulcus and point A in the upper lip; highest intra-group correlations were seen between corresponding soft and hard tissue points; the ratios of soft tissue to corresponding hard tissue movements in lower lip and chin approached 1:1; (iii) in the vertical direction, a strong correlation occurred in the lower lip and chin; highest intra-group correlations wore not necessarily with corresponding landmarks; and (iv) vertical movement of landmarks on the nasal base and upper lip generally showed poor or weak correlation with corresponding soft tissue points. The most reliable hard tissue predictors of horizontal and vertical soft tissue change are tabulated for application in bimaxillary surgery for the class III patient.

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Subjects: Restorative Dentistry and Orthodontics

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