Anchor lag screw vs conventional lag screw in mandibular XXXX : A series of 30 cases.

@entity1 @entity281 @entity174 @entity702
Lag screw osteosynthesis is a well proven technique. Its application is limited by the fact that the spherical head of the screw act as wedge. Combining this screw with a bioconcave washer has broadened the range of applications for lag screw osteosynthesis in the maxillofacial region. PURPOSE: The aim of the study was to compare the efficacy of anchor lag screw with conventional lag screw in @entity174 . @entity1 AND METHOD: Thirty @entity1 with anterior mandible @entity174 with no concomitant @entity174 , @entity281 or extraoral communication, who visited our outpatient Department of Oral and Maxillofacial Surgery, were included in the study after obtaining their informed consent. @entity1 were randomly divided into two groups; where Group A underwent fixation using conventional lag screw and Group B anchor lag screw. The fixation system used included 2  mm @entity702 lag screws of sizes 25  mm, 27  mm and 30  mm and 3  mm @entity702 bioconcave washer. At each follow up visit, clinical data was collected detailing clinical presentation of healing and radiographic findings. RESULTS: Radiographic features at post surgery evaluation indicated loss of bone contact around the screw head and bone resorption in five @entity1 of Group A, thus causing loosening of lag screw whereas none of the @entity1 in Group B, was found to have any such complication. CONCLUSIONS: The findings support the hypothesis that bioconcave washer aids in holding up the farthest fragment at the interface of the @entity174 fragment. Application of bioconcave washer provides easy loading of lag screw.
