Protective impact of bone grafting interventions on early osseointegration and the risk of early biological loss of dental implants according to the IDENT system (2018–2025). A retrospective cohort study

   Objective. To assess the association between bone grafting procedures in the implant site and the incidence of early biological loss of dental implants (1.5–3 month window) based on data from the electronic clinical system IDENT for 2018–2025.

   Materials and мethods. Retrospective cohort study: 8203 patients, 24,975 implants. Exposure – presence of bone grafting (any type) at the time of implant placement; outcome – early biological implant loss within the interval of 1.5–3 months. All 574 events of early loss were included in the analysis. Frequencies were compared using 2×2 tables with calculation of RR and OR (95 % CI) and the χ² test.

   Results. Early loss with bone grafting was 1.15 % (97/8435) versus 2.88 % (477/16540) without bone grafting: RR = 0.40 (95 % CI 0.32–0.50), OR = 00.39 (95 % CI 0.31–0.49), p < 0.001. Absolute risk reduction – 1.73 p. p., NNT ≈ 58.

   Conclusion. Bone grafting procedures are associated with a lower incidence of early biological implant loss. Causal interpretation is limited by the retrospective design and incomplete covariates; standard errors were estimated with a correction for patient-level clustering.

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