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Am J Vet Res. 1996 Jul;57(7):1098-101.

In vitro evaluation of four methods of attaching transfixation pins into a fiberglass cast for use in horses.

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  • 1Department of Large Animal Medicine and Surgery, Texas A&M University, College Station 77843-4475, USA.

Abstract

OBJECTIVE:

To compare the axial stability provided by 4 methods of attaching transfixation pins into a fiberglass cast.

DESIGN:

Axial stability of 4 methods of transfixation pin attachment to a fiberglass cast cylinder was determined in vitro. Methods of attachment included simple incorporation of the pins into the cast, placement of a washer and nut on the pin and incorporation into the cast, extension of pins beyond the cast and attachment to a steel halo, and washers within the cast and attachment to a steel halo.

POPULATION:

A model was designed to simulate a transfixation cast applied to the equine metacarpus. 8 identical constructs were present in each of the 4 groups. 6 fiberglass cylinders were also tested to identify the contribution of the cast cylinder to the overall stability of the transfixation cast.

PROCEDURE:

Load-sufficient curves were recorded, and a stiffness modulus was calculated for each treatment group and for a simple fiberglass cylinder without transfixation pins.

RESULT AND CONCLUSION:

There was no significant difference among the 4 methods of attachment. The fiberglass cast material appears to be the major determinant of axial stability.

PMID:
8807028
[PubMed - indexed for MEDLINE]
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