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 ≥4mm and inferior positioning of the anterior segment >2mm. Over the long term, AOB closure ≥4mm 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.
journal_name
Int J Oral Maxillofac Surgjournal_title
International journal of oral and maxillofacial surgeryauthors
Ismail IN,Leung YYdoi
10.1016/j.ijom.2017.02.1275subject
Has Abstractpub_date
2017-06-01 00:00:00pages
766-773issue
6eissn
0901-5027issn
1399-0020pii
S0901-5027(17)31342-5journal_volume
46pub_type
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journal_title:International journal of oral and maxillofacial surgery
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journal_title:International journal of oral and maxillofacial surgery
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journal_title:International journal of oral and maxillofacial surgery
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journal_title:International journal of oral and maxillofacial surgery
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journal_title:International journal of oral and maxillofacial surgery
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journal_title:International journal of oral and maxillofacial surgery
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journal_title:International journal of oral and maxillofacial surgery
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journal_title:International journal of oral and maxillofacial surgery
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journal_title:International journal of oral and maxillofacial surgery
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journal_title:International journal of oral and maxillofacial surgery
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journal_title:International journal of oral and maxillofacial surgery
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journal_title:International journal of oral and maxillofacial surgery
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journal_title:International journal of oral and maxillofacial surgery
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journal_title:International journal of oral and maxillofacial surgery
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journal_title:International journal of oral and maxillofacial surgery
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