Affiliation:
1. Department of Stomatology, Division of Periodontology, School of Dentistry University of São Paulo São Paulo São Paulo Brazil
2. Department of Dentistry Federal University of Rio Grande do Norte Natal Rio Grande do Norte Brazil
3. Department of Periodontology, College of Dentistry University of Florida Gainesville Florida USA
4. Department of Dentistry, Dental Research Division Guarulhos University Guarulhos São Paulo Brazil
Abstract
AbstractBackgroundThe 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.MethodsThis 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.ResultsA 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).ConclusionThe 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.