– Discussion: – disease of infancy and childhood, however, severity of disease is variable in its severity and progression; – transmitted as an autosomal recessive trait; – there is degeneration of the anterior horn cells of spinal cord w/ associated muscle weakness and atrophy; – its most … Read more
– See: DDH – Discussion: – provides excellent congruity at site of osteotomy, rapid healing, & intrinsic stability with only minimum internal fixation; – performed through anterior approach; – specially curved gouges are used to divide acetabulum from surrounding pelvis through osteotomy site 15 mm from articular surface; … Read more
– See: – Sliding Screw Insertion Technique – Sliding Hip Screw w/ Unstable Intertroch Frx – Subtrochanteric Fractures – Discussion: – sliding screw plate devices have proved to be more successful for subtroch frx than earlier implants for proimal femur; – sliding permits sl medial displacement of shaft in relationship … Read more
– See: – High Angle Plates – Low Plate Angle – Nail Placement in Femoral Head and Neck – Screw Length – Unstable Intertrochanteric Fractures – Discussion: – sliding device w/ screw plate angle closest to combined force … Read more
– Discussion: – osteotomy is made in a manner which leaves the vastus lateralis and gluteus medius muscles are left attached to the osteotomy fragment; – has a lower incidence of abductor dysfunction and proximal migration of trochanter; – presence of an intact vastus helps not only to preserve … Read more
– Discussion: – slip of the captial femoral epiphysis occurs with in a narrow window of physiologic maturity of the growing child; – arises from mechanical and constitutional factors; – pts may have underlying endocrine dz (such as hypothyroidism) delayed puberty & bone age; – position of growth plate of proximal femur normally changes from … Read more
– Biomechanics of Screw-Plate Angle – Checklist – Sliding Hip Screw w/ Unstable Frx – High Angle Plates – Low Plate Angle – Nail Placement in Femoral Head and Neck – Screw Length – Sliding Screw Fixation in Femoral Neck Frx – Sliding Screw Fixation … Read more
– See: – Sliding Screw Insertion Technique – Sliding Screw Fixation in Subtroch Frx – Discussion: – treatment of unstable intertrochanteric frxs w/ sliding screw device w/o obtaining necessary bony stability, risks hardware failure; – if device impinges, it will act as a fixed angle nail … Read more
– Discussion: – device that is placed at lower angle has less force working parallel to sliding axis & more force working perpendicular to sliding axis. – this perpendicular force acts to jam or bend the device, thereby preventing impaction. – device that is placed at lower … Read more
– See: Posterior Frx Dislocations of the Hip – Discussion: – simple posterior dislocation without a fracture occurs from a posteriorly directed force against a flexed and adducted femur; – Associated Injuries – Pre-Reduction Radiographs: (radiographic evaluation of hip dislocation) – AP of the Hip; … Read more