A biomechanical comparison of posterior cruciate ligament reconstructions using single- and double-bundle tibial inlay techniques.
BACKGROUND
The efficacy of using a double-bundle versus single-bundle graft for posterior cruciate ligament reconstruction has not been demonstrated.


OBJECTIVE
A double-bundle graft restores knee kinematics better than a single-bundle graft does in tibial inlay PCL reconstructions.


METHODS
Controlled laboratory study.


METHODS
Eight cadaveric knees were subjected to 6 cycles from a 40-N anterior reference point to a 100-N posterior translational force at 10 degrees , 30 degrees , 60 degrees , and 90 degrees of flexion. Testing was performed for the intact and posterior cruciate deficient knee as well as for both reconstructed conditions. Achilles tendons, divided into 2 equal sections, were prepared as both single-bundle and double-bundle grafts. Both grafts were employed in the same knee, and the order of graft reconstruction was randomized.


RESULTS
There were no statistical differences in translation between the intact state and either of the reconstructions (P > .05) or between either of the reconstructions at any flexion angle (P > .05).


CONCLUSIONS
No differences in translation between the 2 graft options were identified.


CONCLUSIONS
The use of a double-bundle graft may not offer any advantages over a single-bundle graft for tibial inlay posterior cruciate reconstructions.
Bergfeld
John A
JA
South County Orthopedic Specialists, 24331 El Toro Road, Suite 200, Laguna Hills, CA 92653, USA.
Graham
Scott M
SM
Parker
Richard D
RD
Valdevit
Antonio D C
AD
Kambic
Helen E
HE
D000125:Achilles Tendon / Q000637:transplantation*; D000328:Adult; D001696:Biomechanical Phenomena; D005260:Female; D006801:Humans; D007718:Knee Injuries / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D016119:Posterior Cruciate Ligament / Q000293:injuries* / Q000601:surgery*; D019651:Plastic Surgery Procedures