[Objective]To explore the apparatus assembly,operative methods,post-operative management procedure and the effect of Ilizarov s technique of distraction histogenesis to correct the severe compound knee joint deformities (more than two deformities of knee joint such as knee flexion contracture with genu varus and limb shortening).

Clinic investigation of treatment of unilateral congenital pseudarthrosis of tibia and short limb with Ilizarov technique;

Teatment of severe rigid talipes equinovarus deformity with Ilizarov technique;

A clinical study of Ilizarov technique in the correction of hand and forearm deformities;

Objective Compare the clinical efficacy between combined use of guided tissue regeneration and endodontic-endosseus implantation and the simple application of guided tissue regeneration for the treatment of periodontal disease.

Objective:To analyze the problems and the causes during the operation of repairing the defect periodonty by guided tissue regeneration.

The wide application of guided tissue regeneration(GTR) and guided bone regeneration(GBR) into the treatment of the periodontal osseous defects opens up spacious room for rebuilding periodontal tissue, while there is certain limitation to the respective use of each.

GTR and Bone Transplantation in the Treatment of Periodontal Bone Defects——Analysis of 19 Unsuccessful Cases;

Objective To evaluate the effectiveness of regenerous tissue and bone material for autogenous teeth transplantation to recipient sockets whose shapes are bigger than roots of donor teeth.