– Discussion: – generalized pathologic processes in bone can be best understood by understanding how these processes alter the normal sequence of bone remodeling as described in the previous chapter; – bone remodeling occurs in local groups of osteoblasts and osteoclasts called bone multicellular units (BMU); – each unit … Read more
– Discussion: – angle formed by intersection of line drawn from most cephalic point on tuberosity to highest point of posterior facet w/ line from latter to most cephalic part of posterior process of calcaneus; – measures height of the posterior facet; – normal range is … Read more
– See: Bone Graft Menu – PreOp Planning: – if patient has undergone previous bone graft harvests, consider CT scan to determine amount of remaining bone left in the crest; – in the report by Ahlmann E, et al, the authors investigated whether there was less … Read more
– Discussion: (see fracture healing and management of tibial bone defects) – autograft: bone graft harvest techniques – allografts – induced membrane technique – bone marrow aspirates: – in order to maximum the concentration of osteoblast precursors, no more than 2 cc should be … Read more
– Discussion: – blood is supplied to vertebral column by way of segmental arteries that arise near it from the aorta, or from adjacent arteries in areas beyond the extent of the aorta; – costocervical & intercostal arteries in thorax; lumbar and iliolumbar arteries in lumbar region; and lateral sacral … Read more
– See: – Anastomosis of lower limb arteries – Arterial supply of the femur – AVN of femoral head; – AVN following femoral neck fracture – Anatomy: – extracapsular arterieal ring at the base of the femoral neck; … Read more
Discussion body of talus is furnished w/ blood vessels from inferior talar surface in sinus tarsi and from talar neck; non displaced fractures of talar neck disrupt intraosseous branches of tarsal sinus and tarsal canal, but major vascular sling remains intact; w/ displaced fractures of talar neck, branches from dorsalis pedis artery to talar neck, artery … Read more
– See: – Total Hip Replacement Menu: – International Bipolar News – Discussion: – Gilberty & Bateman in 1974, reported use of bipolar prosthesis; – rationale was that erosion and protrusion of acetabulum would be less because motion is present between metal head & … Read more
– See: Role of Knee Joint During Gait: – Discussion: – patella increases the mechanical advantage of extensor muscles by transmitting forces across knee at greater distance (moment) from axis of rotation; – increases functional lever arm of quads as well as changing direction of pull of quad mechanism; … Read more
– Discussion: – integrity of all ligaments of cervical canal is lost, including posterior ligaments, anterior & posterior longitudinal ligaments, disc, and articular facet joints; – this type of injury occurs only when middle & posterior ligamentous structures are disrupted; – there are typically no frxs of facets because … Read more