Mandibular segmental defect or asymmetry due to congenital or acquired factors will lead to severe functional incapacitation and facial deformity.

In the earlier period, it show mobile arthrosis ache, swelling and dysfunction; while in the advanced stage, it show arthrosis rigor, deformed, functional incapacitation or even disability.

There has been no satisfactorily effective method for the clinical treatment of articular cartilage degradation and functional incapacitation due to traumas and cartilage lesions up till now.