Effects of medial meniscal posterior horn avulsion and repair on meniscal displacement.

Medial meniscal posterior root avulsion (MMRA) leads to deleterious alteration of medial joint compartment loading profiles and increased risk of medial degenerative changes. Surgical repair restores more normal biomechanics to the knee. Our hypothesis is that MMRA will cause medial meniscal (MM) extrusion and gap formation between the root attachment site and MM.

Axial and sagittal knee geometry as a risk factor for noncontact anterior cruciate ligament tear: a case-control study.

Purpose: The purpose of this study was to compare the axial and sagittal geometry of the distal femur and proximal tibia in men and women with and without noncontact anterior cruciate ligament (ACL) tears to determine whether a difference existed in these groups.

Methods: Twenty men and 20 women with noncontact ACL tears and preoperative magnetic resonance imaging scans of their knees were compared with 20 men and 20 women who had magnetic resonance imaging for meniscal pathology. Patients were not matched for age, weight, or height.

Effects of medial meniscus posterior horn avulsion and repair on tibiofemoral contact area and peak contact pressure with clinical implications.

Background: Avulsion of the posterior horn attachment of the medial meniscus can compromise load-bearing ability, produce meniscus extrusion, and result in tibiofemoral joint-space narrowing, articular cartilage damage, and osteoarthritis.

Hypothesis: Avulsion of the posterior horn of the medial meniscus will increase peak contact pressure and decrease contact area in the medial compartment of the knee, and posterior horn repair will restore contact area and peak contact pressures to values of the control knee.

Study Design: Controlled laboratory study.

Influence of suture material on the biomechanical behavior of suture-tendon specimens: a controlled study in bovine rotator cuff.

Background: Despite technical advances in rotator cuff surgery, recurrent or persistent defects in the repaired tendon continue to occur. Improved strength of sutures and suture anchors has resulted in the most common site of failure being the suture-tendon interface.

Hypothesis: The type of suture material used has a significant effect on the biomechanics of the suture-tendon interface.