Peri-implantitis

Peri-implantitis is a pathologic condition characterized by inflammation of the peri-implant mucosa accompanied by progressive loss of the supporting alveolar bone around an osseointegrated dental implant. The condition represents the implant analog of periodontitis and follows a clinical progression from peri-implant mucositis, which involves soft tissue inflammation without bone loss, to peri-implantitis, where inflammation has extended to the surrounding bone and resulted in measurable crestal bone resorption. Diagnosis is based on the presence of bleeding on probing, increased peri-implant probing depths relative to baseline measurements, and radiographic evidence of bone loss beyond normal physiologic remodeling. The reported prevalence of peri-implantitis varies widely in the literature but affects a significant percentage of patients with dental implants, making it one of the most common complications in implant dentistry.

The etiology of peri-implantitis is primarily bacterial, with biofilm accumulation on the implant surface triggering an inflammatory response that progressively destroys the supporting bone. Risk factors include a history of periodontitis, inadequate oral hygiene, smoking, diabetes, absence of keratinized mucosa around the implant, excess residual cement from the prosthetic restoration, and occlusal overload. Treatment approaches range from nonsurgical interventions such as mechanical debridement, antiseptic irrigation, and local or systemic antibiotics in early cases, to surgical protocols including open flap debridement, implant surface decontamination, and guided bone regeneration in advanced cases. Despite treatment, peri-implantitis has a high recurrence rate, which underscores the importance of structured maintenance programs that include regular probing, radiographic monitoring, and professional biofilm removal around implants.

Peri-implantitis treatment is coded within the CDT periodontic and implant service categories. Peri-implant mucositis debridement may be billed under D6081, while more extensive surgical intervention can be coded using D6101 for debridement of a peri-implant defect or applicable bone grafting codes such as D4263. Coverage for peri-implantitis treatment varies considerably among dental plans, with some carriers excluding implant-related complications entirely and others covering treatment under the periodontic benefit category. The billing team should verify whether the patient's plan includes implant maintenance and peri-implant disease treatment as covered benefits before initiating care. Practices that place dental implants benefit from establishing a structured implant maintenance recall program, as proactive monitoring reduces the incidence of advanced peri-implantitis and the associated treatment costs while generating predictable hygiene revenue from implant patients.