Data Trace Editor – See: Rickets: – Discussion: – this is the classic form of the disease; – it usually results from a deficiency in dietary intake of vitamin D, often coupled with inadequate exposure to sunlight; – reduced vitamin-D intake causes a diminution in the absorption of calcium from the GI … Read more
– Discussion: – characterized by frx of volar margin of the carpal surface of the radius which is associated w/ subluxation of radiocarpal joint; – similar to Smith’s type III; – comminuted frx of distal radius may involve either anterior or posterior cortex and … Read more
– See: Carpal Instability – Discussion: – by definition, consists of volar flexion of the lunate relative to the longitudinal axis of the radius and capitate, when the wrist rests in a neutral position; – lunate will tend to flex when there is loss of ulnar support from the triquetrum; … Read more
– Discussion: – exhibit stress / strain behavior that is time-rate dependent, and varies w/ the material, that is a function of the material’s internal friction; – visoelastic materials are stiffer and stronger at high strain rates than at low strain rates; – for example in bone-ligament … Read more
– See: Rickets: – Type-I vitamin-D-dependent rickets or osteomalacia: – failure of conversion of 25-hydroxyvit D to 1,25-dihydroxyvit D is the cause of this disorder; – defect is not clearly understood but may be a deficiency or an abnormality of the renal 1-hydroxyvitamin-D-25-hydrolase, believed necessary for the conversion of 1-hydroxyvitamin D … Read more
– Discussion: – see: abnormalities associated with vitamin D. – primary function of vitamin D is to maintain skeletal calcium homeostasis; – promotes gut absorption of calcium (and absorption of phosphorous); – promotes bone absorption; – important for … Read more
– See: Characteristics of Metals and Implants: – Discussion: – more resistant to corrosion than stainless steel; – mechanically inferior to stainless steele and much more difficult and expensive to cast; – has low duchtility, & screws made of this material bond quite securely to bone; – … Read more
– Discussion: – at 2-4th week of development, sclerotome cells arising from paired somites migrate medially & meet in midline around notochord; – these sclerotome cells separate the notocord from neural tube dorsally and from gut ventrally; – paraxial mesoderm becomes segmented into four cranial and … Read more
– See: – Diskitis – Gun Shot Wounds to the Spine – Tuberculous Spondylitis – Discussion: – in adults, lumbar infections may often originate from urinary tract infections which drain thru Batson’s venous plexus; – respiratory system is also … Read more
– Discussion: – results from supination-adduction fracture (Weber A) – adduction forces result in a vertical fracture of the medial malleolus at the junction of the plafond and malleolus; – transverse fibular frx or tear of lat collat occurs concomitantly; – medial … Read more