– Discussion: – ultimate effects of rotation of TKR components: – internal rotation of tibial component w/ respect to tibia will cause external rotation of tibia when knee is reduced, resulting in lateral displacement of the tibial tubercle; – medial rotatation of the tibial & femoral … Read more
– Discussion: – TKR: effects of malrotation – patellar effects: – malrotation of femoral component may lead to patellofemoral dislocation or subluxation; – slight external rotation of femoral component on femur places patellofemoral groove more laterally, enhances patellofemoral stability (external rotation moves … Read more
– See: – Knee Joint Anatomy and Function: – Gait Menu: – Diagram: – Mid-Stance: – knee joint is in approx 15 deg of flexion & is moving toward extension; – primary flexors of ankle are beginning to demonstrate low grade activity; … Read more
– See: Role of Knee Joint in Gait: – Discussion: – for reason of contour of femoral & tibial condyles, flexion & extension of knee joint are not simple hinge movements that occur at the elbow joint. – flexion & extension do not occur about a fixed transverse axis of rotation but rather about a constantly changing … Read more
– Discussion: – see allograft menu and ocd menu; – indicated for larger chondral or osteochondral defects (larger than 2 cm); – donor characteristics: – donors should be less than 30 years of age, with the graft harvesting the intact knee within 24 hrs … Read more
– See: Arthroscopy of the Arthritic Knee – Discussion: – thickness of articular cartilage cannot be assessed by visualization alone, but denuded and eburnated areas of bone can be seen; – these areas are usually spotty, and assessing their importance is difficult High tibial osteotomy in the treatment of osteoarthritis of … Read more
– Discussion: – 2 subtypes: rim avulsions and rim compression frx; – all knees w/ rim frxs have capsular and collateral ligament injuries; – avulsions of rim of tibial plateau articular surface or compression frx of that rim almost always are accompanied by significant collateral or cruciate ligament injury; – may … Read more
– Discussion: – may be indicated for patients with knee stiffness and pain with securely fixed and appropriately aligned components; – involves arthrolysis of adhesions and exchange to a thinner tibial polyethylene insert; – in the report by Babis GC, et al, the authors reviewed their experience with this technique; … Read more
– Assistance provided by Michael Berend MD. … Read more