Distraction represents an exciting new technique and development with various several potential benefits. Distraction osteogenesis,also called callus distraction,Callotasis and Osteodistraction,is a surgical process used to reconstruct skeletal deformities and lengthen the long bones of the body. First,distraction osteogenesis can produce large movements than traditional osteotomies. Second,distraction osteogenesis seems to be associated with less relapse than traditional osteotomies. Distraction osteogenesis has enormous potential for treatment of maxillofacial problems,especially the severe growth deficiencies.It so new,good data do not yet exist to documeits precise role in the treatment of dento-facial problems.