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Objective: This university-based retrospective study aimed to assess the performance of the implant disease risk assessment (IDRA) in predicting peri-implantitis., Material and Methods: Patients with implants loaded for at least 1 year were included. Peri-implantitis development was the outcome, while the IDRA score and its eight vectors were the predictors. The IDRA score was calculated using an online tool. Data were analyzed using Cox proportional hazards models and ROC curve (AUC)., Results: Among 480 implants in 235 patients, 7.9% of implants and 9.4% of patients developed peri-implantitis. Implants at high risk for the "number of sites with PD ≥ 5 mm" vector had an increased risk (HR = 9.8, p = 0.004) of peri-implantitis, compared to those at low risk for this parameter. Implants at moderate (HR = 4.8, p = 0.04) and high (HR = 10.0, p = 0.01) risk for the "distance from the restorative margin (RM) to bone crest (BC)" vector exhibited a higher risk of peri-implantitis than implants at low risk for this parameter. The IDRA tool demonstrated an AUC of 0.66 (sensitivity = 0.80; specificity = 0.24) when estimated at implant level and an AUC of 0.61 (sensitivity = 0.91; specificity = 0.32) when calculated at patient level. The mixed-effects Cox model did not reveal a significant association between the overall IDRA score and the development of peri-implantitis (HR = 7.2, p = 0.18)., Conclusion: IDRA demonstrates good sensitivity but low specificity and suboptimal discriminatory capacity in predicting peri-implantitis. The "number of sites with PD ≥ 5 mm" and "distance from RM to BC" emerged as the most effective predictors for peri-implantitis., (© 2024 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.)

Background: The aim of this study was to evaluate the incidence of preloading crestal bone loss (PLCBL) and to identify the patient-related and implant-related factors associated with PLCBL., Methods: This retrospective cohort examined the dental records of patients who received at least one dental implant. PLCBL was defined as a reduction ⩾0.5 mm and severe PLCBL (primary variable) as a reduction ⩾1.5 mm in mesial and/or distal bone level, measured from the day of implant placement to uncovering or abutment installation/crown delivery. The incidence of PLCBL and patient and implant variables were recorded. Bivariate analysis and binary logistic regression identified factors associated with PLCBL ⩾0.5 mm and ⩾1.5 mm., Results: A total of 746 dental implants placed in 361 patients from January 2011 to July 2021 was included in the analyses. Of the implants assessed, 24.4% (n = 182) exhibited PLCBL ⩾ 0.5 mm and 10.5% (n = 78) presented severe PLCBL (i.e., ⩾1.5 mm). Males (odds ratio [OR] = 1.85, 95% confidence interval [CI] = 1.11-3.07), patients with diabetes (OR = 3.33, 95% CI = 1.73-6.42), and those allergic to penicillin (OR = 3.13, 95% CI = 1.57-6.22) were more likely to experience severe PLCBL (p < 0.05). Implants placed in the anterior area (OR = 2.08, 95% CI = 1.16-3.73), with bone-level platform-abutment connection (OR = 4.73, 95% CI = 1.94-11.49) and inserted supracrestally (OR = 3.77, 95% CI = 1.84-7.72), presented a greater risk of developing severe PLCBL (p < 0.05). Implants placed in a previously grafted area presented a lower likelihood of developing severe PLCBL (OR = 0.489, 95% CI = 0.28-0.84)., Conclusion: The incidence of PLCBL ⩾ 0.5 mm and ⩾1.5 mm was 24.4% and 10.5%, respectively. Male sex, diabetes, allergy to penicillin, anterior location, bone-level platform-abutment connection, and supracrestal implant placement are potential risk factors for severe PLCBL. A previously grafted area is a potential protective factor., (© 2024 American Academy of Periodontology.)