Abstract: Objective To evaluate the clinical effects of diode laser in the secondarystage implant surgery.Methods The 207 implants of 84 patients whose gum covered the surface of implant were treated with diode laser irradiation under the superficial anesthesia three to six months after implantation.The cover screws were taken.The healing abutments were placed on the implants.The ceramometal crown restoration was performed two weeks later.The outcomes were evaluated one month after restoration.Resuits There was no hemorrhage during operation; the operation time was short; there was no pain or swelling after operation and the cut healed quickly.Among the 207 implants,194 implants(93.72%) were at good stage,9 implants(4.35%) were at general stage,and 4 implants (1.93%) were at poor stage.The implant survival ratio was 98.07%.There were no complications.Conclusions Diode Laser is painless,accurate,comfortable,effective,safe and of small harm in the secondarystage implant surgery.

Key words: diode laser, implant, surgery