Comparison of surface area across the allograft-host junction site using conventional and navigated osteotomy technique

Ajay Lall, Eric Hohn, Mimi Y. Kim, Richard G. Gorlick, John A. Abraham, David S. Geller

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

Bulk allograft reconstruction plays an important role in limb-salvage surgery; however, non-union has been reported in up to 27% of cases. The purpose of this study is to quantify average surface contact areas across simulated intraoperative osteotomies using both free-hand and computer-assisted navigation techniques. Pressure-sensitive paper was positioned between two cut ends of a validated composite sawbone and compression was applied using an eight-hole large fragment dynamic compression plate. Thirty-two samples were analyzed for surface area contact to determine osteotomy congruity. Mean contact area using the free-hand osteotomy technique was equal to 0.21 square inches. Compared with a control of 0.69 square inches, average contact area was found to be 30.5% of optimal surface contact. Mean contact area using computer-assisted navigation was equal to 0.33 square inches. Compared with a control of 0.76 square inches, average contact area was found to be 43.7% of optimal surface contact. Limited contact achieved using standard techniques may play a role in the high rate of observed non-union, and an increase in contact area using computer-assisted navigation may improve rates of bone healing. The development of an oncology software package and navigation hardware may serve an important role in decreasing non-union rates in limb salvage surgery.

Original languageEnglish (US)
Article number197540
JournalSarcoma
Volume2012
DOIs
StatePublished - Dec 1 2012

ASJC Scopus subject areas

  • Oncology
  • Radiology Nuclear Medicine and imaging

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