Inclusion Criteria:  adult patients above 45 years of age having type 2 DM HbA1c (≥6.5%) and fasting glucose test probing depth ≥6 mm with bleeding and/or suppuration on at least one site around dental implants that remained in situ On radiographic assessment, the implants exhibited ≥ 3 mm alveolar bone loss apical to the coronal region of the intraosteal portion of the dental implant. Exclusion Criteria Patients were excluded if they indicated current or former history of tobacco smoking, any systemic disease other than DM, enrolled in a non-surgical periodontal maintenance program, history of implant repair, pregnancy, and part six months use of antimicrobials, non-steroidal anti-inflammatory drugs, bisphosphonates, or corticosteroids.