May 2007
Volume 48, Issue 13
ARVO Annual Meeting Abstract  |   May 2007
Inferolateral Migration of Hydrogel Orbital Implants
Author Affiliations & Notes
  • R. M. LeBoyer
    Ophthalmology, Indiana University, Indianapolis, Indiana
  • J. P. Tao
    Ophthalmology, Indiana University, Indianapolis, Indiana
  • W. R. Nunery
    Ophthalmology, Indiana University, Indianapolis, Indiana
  • Footnotes
    Commercial Relationships R.M. LeBoyer, None; J.P. Tao, None; W.R. Nunery, None.
  • Footnotes
    Support None.
Investigative Ophthalmology & Visual Science May 2007, Vol.48, 3579. doi:
  • Views
  • Share
  • Tools
    • Alerts
      This feature is available to authenticated users only.
      Sign In or Create an Account ×
    • Get Citation

      R. M. LeBoyer, J. P. Tao, W. R. Nunery; Inferolateral Migration of Hydrogel Orbital Implants. Invest. Ophthalmol. Vis. Sci. 2007;48(13):3579. doi:

      Download citation file:

      © ARVO (1962-2015); The Authors (2016-present)

  • Supplements

Purpose:: The hydrogel orbital expander (Osmed GmbH, Illmenau, Germany, distributed in United States by IOP, Inc., Costa Mesa, CA) is a relatively new implant designed to provide orbital volume after implantation through a small soft tissue incision. The implant consists of a highly hydrophilic polymer that expands osmotically. Some of these favorable characteristics are countered by potential shortcomings including long term intraorbital erosions, fibrosis, granuloma formation, and extrusion. We report four cases of postoperative migration of these implants

Methods:: We reviewed the charts of four patients treated with a hydrogel expander orbit implant in the same technique. The indications for the procedure, the surgical technique, and details of the implant migration such as final implant location were investigated.

Results:: All four implants extruded at an average 5 months postoperative. The average age at implantation was 5 years old. One implant was implanted primarily while three were implanted secondarily after removal of a failed primary implant or an implant that was not of adequate size in relation to the orbit. The final inferolateral, extraconal position of the implant was similar in all patients. In all cases, the final appearance of the implant was spherical with no abnormalities of contour or surface integrity. No case was complicated by infection.

Conclusions:: While the Osmed hydrogel expander produced excellent intraoperative and immediate-post operative results in each patient, the final expanded implant was situated inferotemporally and outside the muscle cone. While the exact extrusion rate is yet unknown, we suspect that the rapid rate of expansion and not wrapping the implant (e.g. with sclera) contribute to implant migration in the path of least resistance. Further investigation regarding implantation technique and the complication rate of the Osmed expander is warranted.

Keywords: orbit • wound healing 

This PDF is available to Subscribers Only

Sign in or purchase a subscription to access this content. ×

You must be signed into an individual account to use this feature.