Anterior Cruciate Ligament Rupture
Conditions
Brief summary
The present study was aimed to investigate the kinematics differences between round-tunnel (ROT) and flat-tunnel (FLT) techniques and compare the influence to the anterior root of lateral meniscus (ARLM ) in anterior cruciate ligament (ACL) reconstruction when using hamstring graft.
Detailed description
Nine matched pairs of fresh-frozen cadaveric knees were evaluated for the kinematics of intact, ACL-sectioned, and either ROT or FLT reconstructed knees. The graft bundles for FLT technique were separately tensioned. A 6 degrees of freedom robotic system was used to assess knee laxity: (1) 134-N anterior tibial load at 0°, 15°, 30°, 60°, and 90°of knee flexion. (2) 10-Nm of valgus torque followed by 5-Nm of internal rotation torque simulates a pivot-shift test at 15°, 30°. (3) 5-Nm internal and external rotation torques at 0°, 15°, 30°, 60°, and 90°. (4) 10-Nm varus and valgus torques at 15°, 30°. Coverage of ACL tibial footprint and areas of ARLM attachment before and after reaming were measured using three-dimensional isotropic MRI scanning.
Interventions
PROCEDUREround tunnel
reamed with round tunnel
PROCEDUREflat tunnel
reamed with flat tunnel
Sponsors
Peking University Third Hospital
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
DOUBLE (Investigator, Outcomes Assessor)
Intervention model description
Nine matched-paired fresh frozen human cadaveric knees were randomly distributed into two groups: Flat-tunnel (FLT) group and round-tunnel (ROT) group. One knee from each pair was reamed with flat tunnel, while the contralateral knee was reamed with round tunnel.
Eligibility
Sex/Gender
ALL
Age
18 Years to 70 Years
Healthy volunteers
No
Inclusion criteria
* intact knee with no previous injures
Exclusion criteria
* those with ligamentous injury or a limited range of motion
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| simulated pivot-shift test | within 1 hour after surgery | 10-Nm of valgus torque followed by 5-Nm of internal rotation torque simulates a pivot-shift test at 15°, 30° of knee flexion |
| simulated KT-2000 arthrometer | within 1 hour after surgery | 134-N anterior tibial load simulates a KT-2000 arthrometer at 0°, 15°, 30°, 60°, and 90°of knee flexion |
| internal and external rotation | within 1 hour after surgery | 5-Nm internal and external rotation torques at 0°, 15°, 30°, 60°, and 90° of knee flexion |
| varus and valgus | within 1 hour after surgery | 10-Nm varus and valgus torques at 15°, 30°of knee flexion |
| average percentage of ACL tibial footprint coverage | within 1 hour after surgery | Coverage of ACL tibial footprint and areas of ARLM attachment before and after reaming were measured using three-dimensional isotropic MRI scanning post-operation |
Countries
China
Contacts
Primary Contactjiahao zhang, M.D.
Outcome results
None listed