Patients randomly aligned in 2 groups.Vicryl plus sutures were used in group 1 for closing subperiostal flaps after dental implant surgeries and vicryl sutures were used in group 2.

Patients were divided randomly based on computer randomization list in two groups: In group1, vicryl plus 4-0 (Vicryl Plus Ethicon,Johnson & Johnson Company, Sommerville, NJ) suture was used to close surgical site and Vicryl 4-0 (Vicryl Ethicon,Johnson & Johnson Company, Sommerville, NJ) in group II.

All dental implants were placed through creating subperiosteal flaps. In each group, fresh socket placed dental implants were documented. Patients were visited in 1, 2, 3 and 4 weeks after dental implant surgeries.

Postoperative infection was defined as local erythematous change in the sutured wound with purulent discharge or localized abscess formation on surgical site. If wound dehiscence occurred, it was documented.

Patients were blind about what suture was used.

Inclusion Criteria:

• Need 3 dental implants at the posterior of the mandible

Exclusion Criteria:

• Diabetic patients
• smoker
• poor oral hygiene

Patients were blind about kind of sutures which were used to close flaps.