Evaluation of the clinical effect of restoring of the teeth with subgingivally involved defect conserved by crown lengthening surgery;

Comparison of the restorative effects of crown lengthening surgery and gingivectomy on dowel crown of deep-seated subgingival teeth fracture

Objective To observe clinical efficacy of crown lengthening surgery for the treatment of crown-root-fractured teeth,subgingival fractured edge.

Aesthetic crown lengthening of upper anterior teeth and some correlative problems about postoperative prosthodontics;

The application of crown lengthening in the restoration of residual root in old patients;

Discussion on Cosmetic Prosthesis after Crown lengthening;

Objective To investigate the effects of surgical crown lengthening on conservative restoration in anterior residual root.

Objective:To observe the clinical results of the post surgical crown lengthening for different cases of teeth with subgingival destruction.

Observation on the clinical effect of complete overdenture with long crown abutments;