Variations in the anatomical dimensions of the mandibular ramus and the presence of third molars: its effect on the sagittal split ramus osteotomy

Abstract

The authors undertook a prospective study to evaluate the influence that the anatomical dimensions of the ramus of the mandible and the presence of lower third molar teeth may have on the sagittal split ramus osteotomy. The anatomical dimensions measured included the width of the anterior mandibular ramus, the height of the corpus posterior to the second mandibular molar and the antero-posterior anatomical position of the lingual. The influence that these dimensions of the mandible may have on the successful splitting of the mandibular ramus wasThe effect that the presence of wisdom teeth had on the difficulty of the procedure was also investigated. This study found that, unlike the presence of third molars, there was no single anatomical measurement that contributed to the level of difficulty of the sagittal split osteotomy. For descriptive purposes the authors proposes a classification of the four typical patterns of unfavourable splits.

Preoperative removal of lower third molars and bilateral sagittal split osteotomy in the UK

“…This corresponds with the opinion of Beukes et al 15 who recommended removal of lower third molars 9 months pre-BSSO, as they believed that removal during BSSO weakened the retromolar part of the distal segment and complicated bicortical screw fixation. However it should be noted that in their series of 74…”

Morphometric analysis of prognathic and non-prognathic mandibles in relation to BSSO sites using CBCT

“…identified as two factors contributed to the impediment of the sagittal split osteotomy. 4 Routinely, orthopantomogram (OPG) is taken as part of the preoperative evaluation of the mandibular structures. It is however, proven to be problematic when measuring anatomy of the bone due to the image being in two-dimensional view.…”

A transdisciplinary approach for treatment of class III malocclusion

“…Currently the most popular surgical procedure for the correction of dentofacial deformities is bilateral sagittal ramus osteotomy involving the correction of skeletal mandibular discrepancy. [3]…”