Histological and biomechanical evaluation of implanted graft materials in a rabbit vaginal and abdominal model

Wesley S. Hilger, Andrew Walter, Mark E. Zobitz, Kevin O. Leslie, Paul Magtibay, Jeffrey L Cornella

Research output: Contribution to journalArticle

41 Scopus citations

Abstract

Objective: The objective of the study was to describe the histologic and biomechanical changes of implanted dermal collagen graft materials. Study design: Twenty rabbits were randomized into 2 groups (6 and 12 weeks, respectively). Each rabbit had 4 graft segments (human dermis, porcine dermis, porcine collagen-coated polypropylene mesh, and autologous fascia) randomly implanted into the abdomen and the vagina. Biomechanical testing and histologic analysis was performed after recovery of graft segments. Results: Dermal graft segments showed a marked decrease in ultimate strength (84% to 86%) and elastic modulus (73% to 82%) that was significantly different from the decrease seen in autologous fascia or coated synthetic mesh (P < .0008 and P < .0001, respectively). The decrease in ultimate strength was associated with vaginal implantation (P = .057). Dermal graft materials had moderate inflammation and minimal collagen infiltration. Conclusion: The mechanical properties of dermal graft materials decline after implantation. Vaginal implantation may cause a different tissue response to graft material than abdominal implantation. Dermal graft material caused moderate inflammation and minimal collagen ingrowth remote from implantation.

Original languageEnglish (US)
Pages (from-to)1826-1831
Number of pages6
JournalAmerican Journal of Obstetrics and Gynecology
Volume195
Issue number6
DOIs
StatePublished - Dec 2006

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Keywords

  • Dermal graft material
  • Rabbit model
  • Vaginal reconstruction

ASJC Scopus subject areas

  • Medicine(all)
  • Obstetrics and Gynecology

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