Download PDF
Vet Comp Orthop Traumatol 1993; 06(03): 163-165
DOI: 10.1055/s-0038-1633116
Original Research
Schattauer GmbH

Screw Torque and Interfragmentary Compression in Equine Cadaver Longbone Fractures

J. R. Field
1   Department of Clinical Studies, Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada
› Author Affiliations
Further Information

Publication History

Received for publication 12 December 1992

Publication Date:
09 February 2018 (online)

    Permissions and Reprints

Summary

The purpose of the study was to determine what contribution individual surgeon, location and bone type made to the optimal applied screw torque (Mopt) for interfragmentary compression of equine cadaver long-bone fractures. Four surgeons were required to insert 4.5 mm fully-threaded cortical bone screws at several locations in both third metacarpal and third metatarsal bones.

Consideration of individual differences was significant (P <0.05) as was location (P <0.05). There did not appear to be a contribution to variability through bone type.

Torque was also measured at point-of-failure (Mmax) showing no relationship to individual or location.

This study examines the effect of different individuals, location and bone type on the perceived optimal torque for interfragmentary compression of equine longbone fractures. It was found that individuals and location significantly effected the perceived optimal applied torque. This suggest that, for mature equine longbone fractures, the use of torque limiting devices may be a consideration to optimize interfragmental compression.

Keywords

Torque - screws - bone
 

  • REFERENCES

  • 1 Hearn TC, Surowiak JF, Schatzker J. Effects of tapping on the holding strength of cancellous bone screws. V.C.O.T. 1992; 5: 10-2.
    PubMedGoogle Scholar
  • 2 Hughes AN, Jordan BA. The mechanical properties of surgical bone screws and some aspects of insertion practice. Injury 1972; 4: 25-38.
    CrossrefPubMedGoogle Scholar
  • 3 Frandsen PA, Christoffersen H, Madsen T. Holding power of different screws in the femoral head: a study in human cadaver hips. Acta Orthop Scand 1984; 55: 349-51.
    CrossrefPubMedGoogle Scholar
  • 4 von Arx C. Force transmission through friction in plate osteosynthesis. AO-Bulletin 1975
    PubMedGoogle Scholar
  • 5 Cordey J, Rahn BA, Perren SM. Human torque control in the use of bone screws. In: Current Concepts of Internal Fixation of Fractures. Uhthoff HK. (ed). Berlin: Springer; 1980: 235-43.
    Google Scholar
  • 6 Cordey J, Florin P, Veihelmann D. et al. The control of torque applied to screws and the compression achieved in self compressing plates. In: Biomechanics V. Asmussen P, Joergensen L. (eds). Baltimore: University Park Press; 1978: 235-43.
    Google Scholar