Titanium Implant Failure After Chest Wall Osteosynthesis.

BACKGROUND

Our objective was to assess potential contributing factors to implant failure (displacement or rupture) after titanium chest wall osteosynthesis.

METHODS

We retrospectively reviewed the clinical data and preoperative and postoperative computed tomographic scans of patients undergoing chest wall osteosynthesis with titanium implants: the Stratos or the Matrix Fixation System in two European departments of thoracic surgery. The indications for titanium chest wall osteosynthesis, the type and number of implants, the topography of the reconstruction, surgical site infection, and role of associated flap and mesh were assessed.

RESULTS

Between January 2009 and January 2013, 54 patients underwent osteosynthesis after surgical correction of chest wall deformities (n = 25, 46.2%) or to bridge the defect after tumor removal (n = 29, 53.7%). The topography of osteosynthesis was anterior (n = 20), lateral (n = 3), or posterior (n = 1), an average of 1.9 ± 0.9 implants (range, 1 to 5 implants) being used. A combined mesh restored continuity of the chest wall in 15 patients, and muscle flap coverage was performed in 20. The mean follow-up time was 20.2 ± 8.4 months (range, 3 to 48 months). Among these 54 patients, 24 (44%) experienced an implant failure. Seven (29%) were symptomatic. Broken (n = 20, 83.3%) or displaced (n = 4, 16.7%) implants were removed with or without replacement. In patients with broken or displaced implants, the mean duration without implant failure was 6.6 ± 3.1 months (range, 1 to 12 months). There was a significant relationship between the anterior topography of osteosynthesis and implant failure (p = 0.02).

CONCLUSIONS

Long-term follow-up after chest wall osteosynthesis using titanium implants is required, especially in anteriorly placed implants. The high rate of implant failure at 1 year advocates for early removal whenever possible and suggests the need for improvements in design.