Abstract

LATORRE, Carlos Mario  and  RUIZ- ROA, Julio. Use of bicortical screws thread inverted rigid fixation in sagittal ramus osteotomy. CES odontol. [online]. 2015, vol.28, n.1, pp.86-93. ISSN 0120-971X.

The bilateral sagittal ramus osteotomy is a procedure that is considered safe, predictable and stable dentofacial used to correct skeletal abnormalities unique origin or in combination with other facial osteotomies. Osteotomized fixing segments is performed using non-resorbable osteosynthesis material type titanium material, mostly bicortical screws with longer lengths compared to conventional screws used for rigid fixation facial bone, however in some cases, the subsequent final occlusion orthognathic surgery is not similar to preoperative planning planned due to factors associated with rigid fixation with bicortical screws, it has been observed in a wide number of bilateral sagittal osteotomy of ramus during fixation with bicortical screws movements unwanted by the operator type, often observing maximum intercuspation in the right posterior open bite and mild in the left rear area; according to the mandibular biomechanics such movements occur by the presence of the thread axis of the bicortical screws used for rigid fixation which mostly are directed in the direction of clockwise. It is the purpose of this review article, proposing the use of bicortical screws reverse threaded for fixing the mandibular sagittal osteotomy counteracting the undesirable effect observed in the final occlusion patients undergoing bilateral sagittal osteotomy of ramus in patients undergoing surgery monomaxilar bimaxillary orthognathic and for the correction of dentofacial anomalies.

Keywords : Sagittal ramus osteotomy; osteosynthesis; orthognathic surgery; rigid fixation.

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