A parametric design evaluation of lateral prophylactic knee braces

Brian Daley, J. L. Ralston, T. D. Brown, R. A. Brand

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Six major mechanical design variables characterizing single-upright lateral prophylactic knee braces were studied experimentally, using a generic modular brace (GMB). Impulsive valgus loading tests were conducted with the GMB applied to a surrogate leg model. The surrogate involved anatomically realistic aluminum-reinforced acrylic components to model bone, and expendable polymeric blanks to mimic the major knee ligaments. Behavior of the surrogate system reasonably reproduced that of human cadaveric knees under similar loading conditions. Load at failure of the medial collateral ligament (MCL) analog, gross knee stiffness, and MCL relative strain relief were measured for each of twelve parametric brace design permutations. Compared to the unbraced condition, bracing provided statistically significant increases in valgus load uptake at failure and in MCL strain relief. Increasing the dimensions of individual brace components (hinge length and offset; upright length, breadth, and thickness; cuff area), relative to those of a GMB baseline configuration deemed representative of current commerical products, failed to achieve statistically significant improvements in brace performance. However, most below-baseline dimensioning of individual components did significantly compromise GMB performance. These surrogate test data indicate that geometric modifications of current single-upright lateral brace designs are unlikely to substantially improve upon the fairly modest valgus load protection afforded by this class of devices.

Original languageEnglish (US)
Pages (from-to)131-136
Number of pages6
JournalJournal of Biomechanical Engineering
Volume115
Issue number2
DOIs
StatePublished - Jan 1 1993

Fingerprint

Braces
Ligaments
Knee
Collateral Ligaments
Hinges
Acrylics
Loads (forces)
Bone
Stiffness
Knee Medial Collateral Ligament
Aluminum
Leg
Bone and Bones
Equipment and Supplies

All Science Journal Classification (ASJC) codes

  • Biomedical Engineering
  • Physiology (medical)

Cite this

A parametric design evaluation of lateral prophylactic knee braces. / Daley, Brian; Ralston, J. L.; Brown, T. D.; Brand, R. A.

In: Journal of Biomechanical Engineering, Vol. 115, No. 2, 01.01.1993, p. 131-136.

Research output: Contribution to journalArticle

Daley, Brian ; Ralston, J. L. ; Brown, T. D. ; Brand, R. A. / A parametric design evaluation of lateral prophylactic knee braces. In: Journal of Biomechanical Engineering. 1993 ; Vol. 115, No. 2. pp. 131-136.
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