– Discussion: – displaced SH III & IV frxs of distal tibia require open reduction. – left unreduced, this injury leads to premature physeal closure unless anatomically reduced. – Diff Dx: – Three Part Triplane Frx: – appears as SH type III frx on … Read more
– Discussion: – main function of the tibialis posterior is to invert the subtalar joint, which helps to stabilize the transverse tarsal joint during rheumatoid hindfoot; – pathophysiology: – degenerative tears usually occur distal to the medial malleolus, in a region which coincides with relative hypovascularity and sharp turn of the tendon from a verticle to … Read more
– Types of Injuries: – short leg syndrome: (see growth deformities of the limbs) – unequal leg lengths may predispose to injury in shorter leg; – trochanteric bursitis: – gluteus medius attaches by a broad insertion into its lateral … Read more
– 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
– Discussion: – usually presents as irreducible dislocation of PIP joint (as opposed to dorsal dislocations which are usually reducible); – rotatory dislocation involves buttonholing of one condyle of head of proximal phalanx through longitudinal rent in extensor hood between central slip and lateral band; – see: … 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: – Ankle Joint: Anatomy – Equinus Contracture – Gait (discussion of) – Sub-Talar Joint – Diagram: – Ankle Joint: During Gait: – ankle joint has an oblique axis; – in frontal plane, ankle joint is angled 82 … 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