In 1996, Wangerin and coworkers
introduced two updated intraoral bone-borne devices for mandibular lengthening based on
the anatomic location of distraction site - horizontal corpus or
ascending ramus (Wangerin et al., 1996).The
Horizontal Mandibular Distraction Device consists of a square-shaped cylinder (20 mm or 25 mm
long) with two miniplates (L- and T-shaped) on both ends of the appliance. After bending
these plates to the contour of the bone surface, the device is fixed to the mandible by
2.0 mm diameter monocortical screws.
