COVID-19 pandemic

This study focuses on evaluating the success of different treatment methods for peri-implantitis (gum disease around implants) and to understand the factors that might affect the success of the treatment provided.

Qualifying patients will be asked to participate in clinical measurements to compare the long-term success of their treatments.

The aims of the current study are to 1) assess the long-term outcome of the surgical treatment of peri-implantitis and to 2) evaluate the success of the different treatment modalities of peri-implantitis.

Inclusion Criteria:

1. The patient is at least 18 years of age,
2. was initially diagnosed with peri-implantitis at ≥1 implant (peri-implant probing depth (PPD) ≥ 6 mm together with bleeding and/or suppuration on probing (BOP/SoP) and radiologically assessed marginal bone loss ≥ 3 mm),
3. had received treatment for peri-implantitis at least 5 years ago at the Graduate Clinic of Periodontics at University of Michigan, and
4. documentation from ≥ 5 years of clinical and radiological follow-up is available from U of M patients records.

Exclusion Criteria:

1. Has received or is currently receiving radiotherapy,
2. are currently pregnant, unsure of their pregnancy status, or are lactating (as reported by the patient),
3. has health condition(s) or takes medication(s) that are known to affect soft tissue or bone (e.g., Phenytoin)

Subjects who were diagnosed with peri-implantitis and received treatment at least 5 years ago.