Author ORCID Identifier


Defense Date


Document Type


Degree Name

Master of Science in Dentistry



First Advisor

Thomas C. Waldrop, D.D.S., M.S.

Second Advisor

Janina Golob Deeb, D.D.S., M.S.

Third Advisor

Caroline K. Carrico, Ph.D.

Fourth Advisor

Pandora K Lee, D.M.D.


Purpose: Management of peri-implantitis is becoming an increasing component of dental practice. Dental implants can develop peri-implantitis lesions which occur in a non‐linear and accelerating pattern compared to a gradual periodontitis lesion. It is crucial to diagnose and treat this disease early, or ideally prevent it. Contemporary implants have a rough surface texture which is difficult to properly decontaminate as a crucial component for treatment prognosis. Evidence on the long-term effects of Periodontal implant maintenance therapy (PIMT) on implants is limited. This study aims to investigate the effect of periodontal maintenance on peri-implant tissue health.

Methods: A retrospective chart review was conducted at residency clinics on patients who underwent implant therapy with 1-7 years of follow-up. Outcome variables of interest were peri-implantitis and early implant failure. Predictors included PIMT frequency, implant characteristics, and demographics. The associations between implant failure, peri-implantitis, and PIMT frequency were assessed using Fisher's Exact test. The significance level was set at 0.05.

Results: A total of 185 patient records & 501 implants were included in the study. Of those, 29 (6%) demonstrated peri-implantitis, and 22 (5%) had early implant failure. There was a significant association between Periodontal implant maintenance and peri-implantitis (p-value=0.0169). The rate of peri-implantitis was 9% (n=20) for those with no implant maintenance and 3% (n=10) for those with implant maintenance. At the patient level peri-implantitis was 11% for those with no implant maintenance 5% for those with implant maintenance. Early implant failure was also significantly associated with peri-implantitis, with 25% of those with peri-implantitis experiencing early failure compared to 4% of those who did not (p-value=0.0062). PIMT was not significantly associated with early implant failure (p-value=0.4372).

Conclusion: PIMT frequency was associated with implant failure and peri-implantitis in an academic setting, within the limitations of this study.


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