Abstract: Objective: To evaluate the clinical efficacy of collagen sponge on wound healing in the immediate implantation in the molar area. Method: Forty-two patients with immediate implantation in molar regions were collected during January 2017 to December 2017. A total of 49 implants were implanted. Collagen sponge was used to compress on the wound as test group of 26 immediate implantation. The control group of 23 immediate implantation was preformed with open wound. The VAS pain score, wound bleeding, wound healing, and osseointegration were recorded. Results: There were significant differences in wound bleeding between the two groups(P<0.05). There were no significant differences in VAS pain score, wound healing and osseointegration(P>0.05). Conclusion: Collagen sponge has positive effects on wound healing in immediate implantation, the postoperative hemostasis effect is significant,and early osseointegration is not affected.

Key words: collagen sponge, immediate implant, osseointegration