Mandibular asymmetry may be the result of unequal ramus height, unequal corpus length, or a combination of both problems. The diagnosis of asymmetry is essential in treatment planning, since a number of therapeutic options must be considered in the treatment to a seated condylar position in the glenoid fossa. When asymmetry exists, it may be necessary to: accept finished treatment with the mandibular midline to the right or left of the maxillary midline, finish the molars and canines in an end-to-end relationship on the short side, treat with asymmetric extractions, intervene surgically, or use functional appliances to enhance greater growth or remodeling of the mandible on the short side. The purpose of this study was to assess the effect of the ligated anterior repositioning splint, or LARS, in the correction of mandibular asymmetry in Class II patients.