Morphologic features of the mandibular ramus associated with increased surgical time and blood loss in sagittal split-ramus osteotomy.

Purpose: To determine whether specific morphologic features of the mandibular ramus can predict increased surgical time and blood loss in sagittal split-ramus osteotomy (SSRO).

Materials And Methods: The clinical and morphologic features of the mandibular ramus, obtained from computed tomographic images (n=50), were analyzed to predict the surgical time, the time required for ablation of the medial mandibular ramus, and the time required for sectioning of the mandible in performing a modified Obwegeser SSRO.

Results: Significant factors associated with surgical time were an anterior border of the ramus at least 10.

Factors predictive of pterygoid process fractures after pterygomaxillary separation without using an osteotome in Le Fort I osteotomy.

Objective: This study demonstrated pterygomaxillary disjunction patterns and elucidated factors related to unfavorable pterygomaxillary junction fractures in Le Fort I osteotomy without using an osteotome.

Study Design: Clinical and anatomical data obtained from computed tomography images (100 sides) were analyzed for their ability to predict patterns of pterygomaxillary disjunction.

Results: Separation of the pterygomaxillary junction was most frequently performed at the maxillary tuberosity (48.