Abstract
Peri‐implant tissue breakdown can be the result of microbial action as well as of biomechanical and occlusal overload. The long‐term goal of the treatment of peri‐implant breakdown is to arrest the progression of the disease and to achieve a maintainable site for the patient. Peri‐implant bony defects around functioning implants can be treated with either non‐surgical or surgical (resective or regenerative) techniques. Bone regeneration is possible in selected peri‐implant bony defects of functioning implants if appropriate surgical techniques are utilized and the etiologic cause is eradicated. J Periodontol 1993; 64:1176–1183.