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"Efficacy and safety of expanded polytetrafluoroethylene implantation in the correction of long-term posttraumatic enophthalmos".

Long-term enophthalmos is a common orbital fracture sequela. Various autografts and alloplastic materials have been studied in post-traumatic enophthalmos repair. However, the expanded polytetrafluoroethylene (ePTFE) implantation in late enophthalmos repair has scarcely been reported. Herein, we report novel use of ePTFE for late post-traumatic enophthalmos (PTE) repair. This retrospective study included patients with post-traumatic long-term enophthalmos who underwent hand-carved ePTFE intraorbital implantation for enophthalmos correction. Computed tomography data were collected preoperatively and at follow-up. The volume of ePTFE, the degree of proptosis (DP), and enophthalmos were measured. Postoperative and preoperative DP and enophthalmos were compared using paired t-test. The correlation between ePTFE volume and DP increment was established using linear regression. Complications were identified via chart review. Results showed that from 2014 to 2021, 32 patients were included, with a mean follow-up of 19.59 months. The mean volume of implanted ePTFE was 2.39 ± 0.89 ml. After surgery, the DP of the affected globe significantly improved from 12.75 ± 2.12 mm to 15.06 ± 2.50 mm (p<0.0001). A significant linear correlation was found between ePTFE volume and DP increment (p<0.0001). Enophthalmos were substantially ameliorated from 3.35 ± 1.89 mm to 1.09 ± 2.07 mm (p<0.0001). Twenty-five (78.23%) patients had postoperative enophthalmos less than 2 mm. Infection and implant dislocation were not observed. The authors concluded that ePTFE intraorbital implantation exhibited long-term efficacy and safety for late PTE repair. Thus, the ePTFE method is an effective and predictable alternative.

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