Peri implant bone resorption on microvascular free fibula flap: a radiographic retrospective study

Peri implant bone resorption on microvascular free fibula flap: a radiographic retrospective study

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Introduction: As the vascularization of the microvascular free fibula flap enables to maintain an osteogenic potential, osseointegrated implants have a 86% to 99% success rate.Thus, only few studies consider peri-implant bone resorption (PIBR).The aim of the study was to radiologically evaluate PIBR on fibula flaps.Materials and methods: Data were retrospectively collected.Gender, age, reason for interruptive mandibulectomy, previous radiotherapy, number of implants placed on the reconstruction, length raceline renegade 8 16x10 and number of segments of the reconstruction, height of resorption were collected for each patient.

Measurements were made on panoramic radiograph.Results: 85 clinical reports were reviewed for 39 retained.Peri-implant bone resorption was observed in 21 (53.9%) patients.The average age of the resorption group was 55.

4.All of the 5 patients with uunipelti 4 or 5 implants on their reconstruction did not developed PIBR.59.1% of patients with 1 segment reconstruction developed PIBR, 54.6% with 2 segments and 33.

3% with 3 segments.Discussion: Age and poor oral hygiene appeared to be clearly more related to PIBR.An important number of implant (4 or 5) and a reconstruction with more than 1 segment seemed to decrease PIBR.Further studies are required to confirm these hypotheses.