Controlling anterior tibial displacement under static load: a comparison of two braces.

This article presents data comparing the restraining effect of the Lenox Hill and the CTi brace to static loading using the KT-1000 Knee Ligament Arthrometer. Testing was performed at 25 degrees and 90 degrees in 15 patients with documented single ligament injuries involving the anterior cruciate. The opposite knee was determined to be normal by subjective and objective testing and was used as the control. Results showed that the anterior drawer tests, both the Lenox Hill and the CTi brace improved the ACL deficient knee significantly. With 15 lb of passive loading, both the Lenox Hill and the CTi brace improved the drawer to within normal limits. However, only the CTi brace was able to return the drawer to within the normal range at the 20 lb force level. Neither brace improved the drawer to normal when subjected to the higher loads created by an active drawer test. At 90 degrees, 15 lb of passive loading could not discriminate between the braced and the unbraced knee or between the normal and ACL deficient knee. When 20 lb of force was applied, only the CTi brace improved the drawer significantly, which placed the drawer into the normal range. Under static testing condition, the CTi brace proved to be better than the Lenox Hill in controlling the anterior drawer in flexion and at 20 lb of passive loads; however, when higher loading forces were used in the active anterior drawer test, neither brace was effective in controlling anterior tibial translation.(ABSTRACT TRUNCATED AT 250 WORDS)