– See: – Associated Transverse and Posterior Wall Frx – Classification and Column Theory – Discussion: – most common type of acetabular frx (up to 50% of acetabular fractures will contain a posterior wall fragment); – posterior wall frxs involve the posterior articular surfaces, often w/ retroacetabular … Read more
– Discussion: – refers to the portion of the posterior wall and column at the mid acetabulum lying above the ischial spine; – screws placed in this one are at risk for joint penentration; – anatomic safe zone: – entry point … Read more
– Discussion: – initial postop plaster splint holds the wrist in 20 degree flexion, MP joints in at least 60 degree flexion, and digits should be held in extension inorder to avoid contractures; – motion is begun after a few days, once it is clear that the wounds are healing well; … Read more
– Radiographic Evaluation: – hyper-extension lateral view: – allows assessment of percentage of impingement by intercondylar roof; – a line is drawn thru the center of the tibial tunnel and a line is drawn tangential to the slope of the intercondylar roof; … Read more
– Discussion: – initial postop plaster splint holds wrist in 20 deg flexion, MP joints in at least 60 deg flexion, and digits should be held in extension in order to avoid contractures; – early motion is started to decrease tendon adhesions & to improve digit motion; – patients … Read more
– See: EMG Menu: – Discussion: – associated w/ muscle denervation or myopathy; – these are often found in assoc w/ fibrillation potentials, but tend to procede them in appearance after a nerve lesion
– See: Osteolysis and Insertion of Polyethylene – Discussion: – originally Charnley used high density polyethylene and later this was changed to ultrahigh molecular weight polyethylene – impact strength of UHMWPE is higher than that for HDPE and the density of UHMWPE is much lower than … Read more
– See: differential diagnosis of posterior fossa masses – Discussion: – popliteal artery is the continuation of superficial femoral artery at hiatus of the adductor magnus muscle; – artery is anchored proximally by tendinous insertion of adductor magnus upon the medial femoral epicondyle; – it runs posterior to the distal … Read more
– Anatomy: – origin: – lateral condyle & posterior horn of lateral meniscus fibular head; – popliteus muscle has 3 origins, strongest of which is from lateral femoral condyle, just anterior and inferior to the LCL origin; … Read more
– Discussion: – polydactyly in the foot usually involes a single duplication (hexadactyly) – associated anomalies: – duplications occur bilaterally in about 40-50% of patients, but often the duplications are not symmetric; – polydactyly of hand … Read more