Peri-Implantitis Risk Prediction Using a Computer Based Periodontal Risk Calculator Tool: A Retrospective Study
Date of Award
Master of Science (MS)
Introduction: Although literature is abundant on the diagnosis and management of peri-implantitis after it has occurred, to our current knowledge there are no studies that have specifically looked into the relationship between peri-implantitis and the periodontal risk assessment tool used for natural dentitions.Material and Methods: In this retrospective study, the patient population included patients (>20 years of age) who had implants placed and restored at Marquette University School of Dentistry (MUSOD) from 2008 to 2016. Further, the restored implants in these patients must have been in function for at least one year and followed up in the school with clinical and radiographic examinations. Patients excluded from the study were those who had radiation therapy, or any patients who did not have acceptable radiographs for proper documentation. Before collecting data from patients' existing records, approval was obtained from MUSoD's Institutional Review Board. Patient records were screened from a list of 1,496 patients who had 3,032 implants placed at the school between the mentioned period. A total of 112 implants placed in 83 patients were included for analysis. Results: All cases with PRC of 1 were in the control group while all cases with PRC of 4 and 5 were in the test group. Average proximal bone loss was significantly correlated with PRC scores. The patients with higher PRC scores had more average proximal bone loss when measured radiographically. Average proximal bone loss in the control group was 0.11mm and in the peri-implantitis group was 2.48 mm. Conclusions: Periodontal risk calculator may be used to predict risk of periimplantitis occurrence and degree of radiographic proximal bone loss around dental implants. Higher PRC scores were correlated with higher bone loss and lower PRC scores were correlated with reduced severity of bone loss.