3D evaluation of the lingual fracture line after a bilateral sagittal split osteotomy of the mandible.
until further notice
SourceInternational Journal of Oral and Maxillofacial Surgery, 38, 12, (2009), pp. 1244-9
Article / Letter to editor
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Oral and Maxillofacial Surgery
International Journal of Oral and Maxillofacial Surgery
SubjectNCEBP 2: Evaluation of complex medical interventions; ONCOL 3: Translational research
The purpose of this prospective observational study was to evaluate whether cone beam CT (CBCT) is a useful tool for analyzing the fracture line in a bilateral sagittal split osteotomy (BSSO). The patient group consisted of 40 consecutive patients (9 males and 31 females) with a mandibular hypoplasia who underwent a BSSO advancement (Hunsuck modification; n=80 splits) between September 2006 and July 2008. The mean age at the time of surgery was 34 years (range 17-61 years). A newly developed lingual split scale was used to categorize the path of the fracture line on the lingual side of the ramus based on one-day postoperative data sets reconstructed from CBCT data. Although all splits (n=80) were performed according to the standardized protocol, only 51% of the fracture lines run according to the Hunsuck's description, whereas 33% ran through the mandibular canal and 16% split otherwise. The split pattern was influenced by the length of the medial osteotomy (p=0.01). In conclusion, 3D imaging is a useful tool for analyzing the surgical outcome of a BSSO and has the potential to provide substantial data on the position of the proximal segments as a result of the lingual fracture line.
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