The conservative therapy of subgingival residual root

Objective: To discuss the curative effect of orthodontic traction and gingivectomy on preservip the subgingivalresidual root. Methods: 16 patients were selected after root canal therapy, the residual roots were tracted out within arange of 1.5mm～3.0 mm. In some cases, gingivectomy was performed to improve esthetic effect. Then the roots werefixed for 2 or 3 months and restored by dowel crown. Results: Two cases failed in the 16 patients. In one case, the residualroot was found some other fragments. The other patient was not willing to cooperate because of long traction period. Bothof their residual roots were extracted. The rest patients were satisfied with the restoration result. Conclusions: By usingorthodontic traction, the residual roots were tracted from subgingival level to supragingival level. In combined withgingivectomy, the fixed restoration of subgingival residual roots become possible