Biomechanical analysis of single- versus double-screw fixation in slipped capital femoral epiphysis at physiological load levels

L. J. Kibiloski; R. M. Doane; L. A. Karol; R. C. Haut; R. T. Loder

doi:10.1097/01241398-199409000-00015

Biomechanical analysis of single- versus double-screw fixation in slipped capital femoral epiphysis at physiological load levels

L. J. Kibiloski, R. M. Doane, L. A. Karol, R. C. Haut, R. T. Loder

Research output: Contribution to journal › Article › peer-review

43 Scopus citations

Abstract

Slipped capital femoral epiphyses in 12 pairs of bovine femora were pinned with a single screw on one side and two screws on the other. The specimens were subjected to physiological shear loads across the epiphysis (100 cycles at 1.1 Hz; 400 N for slow walking, and 900 N for fast walking). The rates of creep were decreased 23% with double screws compared to single screws at slow walking, and 30% at fast walking; this was not statistically significant. Single-screw fixation in slipped epiphyses is thus recommended, because the small gains in resistance to cyclic creep at physiological loading were not statistically different, and did not offset the increased risks of complications with multiple screws.

Original language	English (US)
Pages (from-to)	627-630
Number of pages	4
Journal	Journal of Pediatric Orthopaedics
Volume	14
Issue number	5
DOIs	https://doi.org/10.1097/01241398-199409000-00015
State	Published - Jan 1 1994

Keywords

Bovine femur
Cyclic creep
Physiological load
Single- or double-screw fixation
Slipped capital femoral epiphysis

ASJC Scopus subject areas

Pediatrics, Perinatology, and Child Health
Orthopedics and Sports Medicine

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10.1097/01241398-199409000-00015

Cite this

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title = "Biomechanical analysis of single- versus double-screw fixation in slipped capital femoral epiphysis at physiological load levels",

abstract = "Slipped capital femoral epiphyses in 12 pairs of bovine femora were pinned with a single screw on one side and two screws on the other. The specimens were subjected to physiological shear loads across the epiphysis (100 cycles at 1.1 Hz; 400 N for slow walking, and 900 N for fast walking). The rates of creep were decreased 23% with double screws compared to single screws at slow walking, and 30% at fast walking; this was not statistically significant. Single-screw fixation in slipped epiphyses is thus recommended, because the small gains in resistance to cyclic creep at physiological loading were not statistically different, and did not offset the increased risks of complications with multiple screws.",

keywords = "Bovine femur, Cyclic creep, Physiological load, Single- or double-screw fixation, Slipped capital femoral epiphysis",

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AU - Kibiloski, L. J.

AU - Doane, R. M.

AU - Karol, L. A.

AU - Haut, R. C.

AU - Loder, R. T.

PY - 1994/1/1

Y1 - 1994/1/1

N2 - Slipped capital femoral epiphyses in 12 pairs of bovine femora were pinned with a single screw on one side and two screws on the other. The specimens were subjected to physiological shear loads across the epiphysis (100 cycles at 1.1 Hz; 400 N for slow walking, and 900 N for fast walking). The rates of creep were decreased 23% with double screws compared to single screws at slow walking, and 30% at fast walking; this was not statistically significant. Single-screw fixation in slipped epiphyses is thus recommended, because the small gains in resistance to cyclic creep at physiological loading were not statistically different, and did not offset the increased risks of complications with multiple screws.

AB - Slipped capital femoral epiphyses in 12 pairs of bovine femora were pinned with a single screw on one side and two screws on the other. The specimens were subjected to physiological shear loads across the epiphysis (100 cycles at 1.1 Hz; 400 N for slow walking, and 900 N for fast walking). The rates of creep were decreased 23% with double screws compared to single screws at slow walking, and 30% at fast walking; this was not statistically significant. Single-screw fixation in slipped epiphyses is thus recommended, because the small gains in resistance to cyclic creep at physiological loading were not statistically different, and did not offset the increased risks of complications with multiple screws.

KW - Bovine femur

KW - Cyclic creep

KW - Physiological load

KW - Single- or double-screw fixation

KW - Slipped capital femoral epiphysis

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Biomechanical analysis of single- versus double-screw fixation in slipped capital femoral epiphysis at physiological load levels

Abstract

Keywords

ASJC Scopus subject areas

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