Efficacy of bone staples for fixation

W. L. Bargar, Neil Sharkey, H. A. Paul, D. J. Manske

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The pull-out strength of two types of bone staples (A, Techmedica; B, Richards) was evaluated in a canine model and compared with a control of 6.5 mm cancellous bone screw (Synthes). Fifteen adult mongrel dogs were divided into three groups of five animals each. The implants were placed in the lateral femoral condyle and proximal humerus on the right side at time zero, and on the left side 3 weeks later. The dogs were killed at 6 weeks. In addition a third site, the tibial tubercle, was used to examine the effectiveness of each device for patellar tendon reattachment. The strength of the reattached patellar tendon was measured and compared with a control intact patellar tendon insertion. The pull-out loads from bone of the two staple types are not statistically different. The displacement to failure, however, was found to be 71% greater (p < 0.007), and the work to failure 128% greater (p < 0.010) for staple A as compared with staple B. This may be of clinical relevance in avoiding staple back-out. Both staples were inferior to the screw for pull-out load displacement and work to failure (p < 0.0001). All reattached tendons were significantly weaker (mean 202 N) than the intact tendon (mean 1,448 N) regardless of implant type. The dissected specimens uniformly showed necrosis of the tendon under the implant. Healing was by massive scar formation surrounding the implant.

Original languageEnglish (US)
Pages (from-to)326-330
Number of pages5
JournalJournal of Orthopaedic Trauma
Volume1
Issue number4
DOIs
StatePublished - Jan 1 1987

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Patellar Ligament
Tendons
Bone and Bones
Bone Screws
Dogs
Humerus
Thigh
Workload
Cicatrix
Canidae
Necrosis
Equipment and Supplies

All Science Journal Classification (ASJC) codes

  • Surgery
  • Orthopedics and Sports Medicine

Cite this

Bargar, W. L. ; Sharkey, Neil ; Paul, H. A. ; Manske, D. J. / Efficacy of bone staples for fixation. In: Journal of Orthopaedic Trauma. 1987 ; Vol. 1, No. 4. pp. 326-330.
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Efficacy of bone staples for fixation. / Bargar, W. L.; Sharkey, Neil; Paul, H. A.; Manske, D. J.

In: Journal of Orthopaedic Trauma, Vol. 1, No. 4, 01.01.1987, p. 326-330.

Research output: Contribution to journalArticle

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