COMPARATIVE STUDY
JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
REVIEW
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Effect of Optic Nerve Disinsertion During Evisceration on Nonporous Implant Migration: A Comparative Case Series and a Review of Literature.

AIM: To determine whether evisceration with optic nerve disinsertion and nonporous implant placement increases the risk of implant migration.

METHODS: This was a single-center, retrospective consecutive comparative interventional case series including patients undergoing evisceration with nonporous implant between January and December 2014. Patients were grouped into 2 groups: group I where the optic nerve was not disinserted (n = 37) and group II with optic nerve disinsertion (n = 50). Implant migration was assessed clinically and on patient photographs. Migration was subclassified as decentration that did not affect the prosthetic outcome and displacement that affected the prosthetic outcome. The secondary outcome measures were the mean implant diameter, volume of the custom ocular prosthesis, and implant-related complications like exposure and extrusion between the 2 groups.

RESULTS: At a mean follow up of 12.5 months, none of the sockets in group I and 3 (6%) sockets in group II (p = 0.35) had evidence of implant decentration. There were no cases of implant displacement in both groups. The mean implant diameter in group I was 16.97 mm ± 0.65 mm and in group II 19.2 mm ± 0.83 mm (p = 0.0001). Implant extrusion was not different between the 2 groups. The mean custom ocular prosthesis volume in group I was 3.86 ml ± 0.52 ml and in group II 2.50 ml ± 0.68 ml (p < 0.0001).

CONCLUSIONS: The rate of nonporous implant migration due to optic nerve disinsertion is not statistically or clinically significant in evisceration with optic nerve disinsertion, allowing placement of a larger implant and fabrication of a custom ocular prosthesis with an ideal weight.

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