Which kind of miniplate to use in mandibular sagittal split osteotomy? An in vitro study

The goal of the present study was to verify the resistance to displacement of six different miniplate fixation methods after sagittal split osteotomy.

Methods: Sagittal osteotomy was performed in 30 polyurethane synthetic mandible replicas. The distal segments were advanced (4 mm) and specimens were grouped according to the fixation method: Group 1: four-hole standard miniplate; Group 2: four-hole locking miniplate; Group 3: six-hole standard miniplate; Group 4: six-hole locking miniplate; Group 5: six-hole standard sagittal plate, and Group 6: six-hole locking sagittal plate. Biomechanical evaluation was performed by applying compression loads to three points on the second molar region, using an Instron universal testing machine until a 3-mm displacement of the segments was detected. The compression loads able to produce 3-mm displacement were recorded in kN and subjected to analysis of variance ( P < 0.01) and to Tukey tests for comparison between the groups ( P < 0.05).

Results: The locking sagittal plate showed higher resistance to displacement than the regular four- and six-hole standard plates. No significant differences were observed between the locking sagittal plate and the regular sagittal or the four-hole locking plates. Two among the three groups with the best results had locking plates as the method of fixation.

Conclusions: Fixation of sagittal split osteotomy with a single miniplate is better accomplished by using six-hole locking sagittal plates, six-hole standard sagittal plates, or four-hole locking plates, since these methods are more resistant to displacement.

Conflict of interest: None declared.

Only gold members can continue reading. Log In or Register to continue

Jan 27, 2018 | Posted by in Oral and Maxillofacial Surgery | Comments Off on Which kind of miniplate to use in mandibular sagittal split osteotomy? An in vitro study
Premium Wordpress Themes by UFO Themes