This is a meta-analysis of reported risk factors of a ‘bad split’ in a sagittal split mandibular osteotomy. They identified 30 observational articles and therefore acknowledged it is based on low quality studies. It is compounded by the definition of a bad split and its likely underreporting.

They concluded that there was no robust evidence to show that patient age, presence of third molars or surgical technique may influence the incidence of a bad split.

Bad splits and bilateral sagittal split osteotomy systematic review and meta-analysis of reported risk factors.
Steenen SA, Wijkaj, Becking AG.
INTERNATIONAL JOURNAL OF ORAL AND MAXILLOFACIAL SURGERY
2016;45(8):971-9.
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Stuart Clark

Manchester Royal Infirmary, Manchester, UK.

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