Work

Does Early Re‐Entry Surgery Following Simultaneous Guided Bone Regeneration Compromise the Dimension of Peri‐Implant Tissues?

Year: 2025

Type: article

Abstract: ABSTRACT Aim To investigate whether early re‐entry surgery following simultaneous guided bone regeneration (GBR) and implant placement has a negative impact on the outcome of bone regeneration and osseointegration. Materials and Methods In the edentulous mandible of six mongrel dogs, buccal peri‐implant dehiscence defects were surgically created. Bone‐level implants were placed with GBR, followed by submerged healing. Two experimental groups were randomly assigned according to the timing of re‐entry and healing abutment connection at 2 months (early group) and 4 months (late group) following GBR. All animals were euthanised 5 months after GBR for histological analysis. Results One implant in the late group failed as a result of fibrin incarceration. There was no statistically significant difference between the two groups regarding new bone area (1.98 mm2 [interquartile range, 1.53–2.98] and 0.88 mm2 [0.09–1.79]; early vs. late group, respectively; p = 0.063); bone‐to‐implant contact (53.80% [40.88–63.10] and 54.15% [45.21–66.02], early vs. late groups, respectively; p > 0.999); width and height of the augmented tissue (p > 0.05); and peri‐implant mucosal dimensions including thickness, height and volume (p > 0.05). Conclusion Early second‐stage surgery results in similar bone regeneration, osseointegration and mucosal dimensions as late abutment connection.

Source: Journal Of Clinical Periodontology

DOI: 10.1111/jcpe.70006

Authors: Sung Jin Yoo, Jin‐Young Park, Young Woo Song, Ui‐Won Jung, Daniel S. Thoma, Ronald E. Jung