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Anterior open bite correction by Le Fort I osteotomy with or without anterior segmentation: which is more stable?

Ismail, Izzati Nabilah Ismail and Leung, Y.Y. (2017) Anterior open bite correction by Le Fort I osteotomy with or without anterior segmentation: which is more stable? International Journal of Oral and Maxillofacial Surgery, 46 (6). pp. 766-773. ISSN 0901-5027

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Abstract

A retrospective cohort study was conducted to analyze the relapse rate of anterior open bite (AOB) correction comparing Le Fort I osteotomy with and without anterior segmentation. The risk factors that might contribute to relapse were also assessed. Lateral cephalograms obtained at six different times were analyzed. A total of 81 patients with AOB were recruited. Thirty-five patients underwent Le Fort I osteotomy without anterior segmentation and 46 patients underwent anterior segmentation. Le Fort I osteotomy with anterior segmentation resulted in significantly more AOB relapse when compared to that without anterior segmentation at 7 weeks postoperative (15.2% vs. 0%, P = 0.016). During the early postoperative period, factors that contributed to AOB relapse in Le Fort I osteotomy with anterior segmentation were AOB closure 4 mm and inferior positioning of the anterior segment >2 mm. Over the long term, AOB closure �4 mm and intraoral vertical ramus osteotomy as the only mandibular procedure were factors identified as causing more AOB relapse in those treated by Le Fort I osteotomy with anterior segmentation. In conclusion, Le Fort I osteotomy without anterior segmentation was found to be more stable in the surgical correction of AOB in the early and late postoperative periods.

Item Type: Article (Journal)
Additional Information: 6729/56641
Uncontrolled Keywords: anterior open bite; Le Fort I osteotomy; maxillary surgery; anterior segmentation; cephalometric analysis
Subjects: R Medicine > RD Surgery
R Medicine > RK Dentistry
Kulliyyahs/Centres/Divisions/Institutes: Kulliyyah of Dentistry
Depositing User: Dr Izzati Ismail
Date Deposited: 12 May 2017 16:22
Last Modified: 06 Nov 2017 01:44
URI: http://irep.iium.edu.my/id/eprint/56641

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