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Related Experiment Videos

Liquid silicone as a lunate prosthesis.

G Hasselgren1, R Jerre, M Ullman

  • 1Sahlgren University Hospital, Gothenburg, Sweden.

Journal of Hand Surgery (Edinburgh, Scotland)
|February 1, 1990
PubMed
Summary

Liquid silicone prostheses for lunatomalacia showed mixed results, with some patients achieving pain relief after 7 years. Despite prosthesis deformation, silicone synovitis was surprisingly absent, suggesting potential indications for this surgical approach.

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Area of Science:

  • Orthopedic surgery
  • Biomaterials science

Background:

  • Lunatomalacia, a condition affecting the lunate bone, can cause significant wrist pain and dysfunction.
  • Current treatment options for lunatomalacia have limitations, necessitating exploration of novel surgical interventions.

Purpose of the Study:

  • To evaluate the long-term efficacy and safety of using in-situ molded liquid silicone prostheses for treating lunatomalacia.
  • To identify patient subgroups that may benefit most from this surgical technique.

Main Methods:

  • Eleven patients with lunatomalacia underwent surgical excision of the lunate bone.
  • A liquid silicone prosthesis was instilled into the defect, vulcanizing to form an in-situ molded implant.
  • Patients were followed for a mean of 7.1 years, with outcomes assessed for pain, function, and complications.

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Main Results:

  • Four patients reported being pain-free, and two experienced pain only during work.
  • Three patients showed no improvement, and two required subsequent wrist arthrodesis.
  • Despite significant prosthesis fracture or deformation in most cases, no instances of silicone synovitis were observed.

Conclusions:

  • In-situ molded liquid silicone prostheses for lunatomalacia offer a potential, albeit variable, treatment option with a low risk of silicone synovitis.
  • Pre-operative classification (Group IV) appeared to be a predictor of successful outcomes.
  • Further research is warranted to refine the technique and understand the long-term behavior of these implants.