Objective. To discover the relation between alkaline phosphatase （ALP） in gingival crevicular fluid （GCF） of implant teeth and the curing results. Methods. We measured the ALP level in GCF among 56 cases of implant teeth which included 2 failed cases

5 cases with bad oral hygiene and gingivitis

and compared it with that in the normal group composed of 10 persons. Results. The ALP levels in normal group and success implant group showed no difference. The ALP levels in normal group and success with gingivitis group showed obvious difference. The ALP levels of the 2 failed cases are the highest of all.Conclusions. The ALP level in GCF is an important index in evaluating the curing result of the implant teeth.