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Clin J Sport Med. 2013 Jul;23(4):287-92. doi: 10.1097/JSM.0b013e31827ee800.

The effect of knee braces on tibial rotation in anterior cruciate ligament-deficient knees during high-demand athletic activities.

Author information

1
Department of Orthopaedic Surgery, Orthopaedic Sports Medicine Center, University of Ioannina, Ioannina, Greece. dimitris.p.giotis@gmail.com

Abstract

OBJECTIVE:

To examine if bracing can restrict tibial rotation in anterior cruciate ligament (ACL)-deficient patients during high loading activities.

DESIGN:

Repeated measures. Kinematic data were collected with an 8-camera Vicon system while each patient performed 2 tasks that are known to cause increased rotational and translational loads on the knee: (1) descending from a stair and subsequent pivoting, and (2) landing from a platform and subsequent pivoting. The tasks were repeated under 3 brace conditions for the ACL-deficient knee: (1) wearing a prophylactic brace (braced condition), (2) wearing a patellofemoral brace (sleeved condition), and (3) without brace (unbraced condition).

SETTING:

Biomechanical laboratory study.

PATIENTS:

Twenty-one male subjects with a confirmed unilateral ACL rupture were assessed in vivo.

MAIN OUTCOME MEASURES:

Tibial internal rotation. Two repeated measures ANOVAs tested for differences in tibial internal rotation among the 3 conditions of the ACL-deficient knee and the unbraced condition of the intact knee.

RESULTS:

In both tasks, tibial rotation was significantly lower in the intact knee compared with all 3 conditions of the ACL-deficient knee (P ≤ 0.031). Bracing the ACL-deficient knee resulted in lower rotation than the unbraced (P ≤ 0.001) and sleeved (P ≤ 0.033) conditions. The sleeved condition resulted in lower tibial rotation in the drop landing and pivoting task compared with the unbraced condition (P = 0.019) but not in the stair descending and pivoting task (P = 0.256).

CONCLUSIONS:

Bracing decreased the excessive tibial rotation in ACL-deficient patients during high-demand activities but failed to fully restore normative values. If knee braces can enhance rotational knee stability in ACL-deficient patients, then they could possibly play an important role in preventing further knee pathology in such patients.

PMID:
23348606
DOI:
10.1097/JSM.0b013e31827ee800
[Indexed for MEDLINE]
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