– See: Radiographic Imaging – Discussion: – unstable scaphoid fractures not only impact the potential for healing with non operative treatment, but they also impact on the position of healing (and possible scaphoid non union or malunion); – indicators of instability: – trans-scaphoid perilunate dislocation; … Read more
– Displaced Extra-Articular Fractures – Spiral oblique of Proximal Phalanx: – is inherently unstable, and requires internal fixation – reduction can be obtained – attempt 2 or 3 K wires; – Transverse Frx at Neck of Proximal Phalanx: – common in children – “Booby – trap – fracture” – angulation is between 60 and 90 … Read more
– See: – Radiographic Findings – Sliding Hip Screw w/ Unstable Frx – Discussion: – it is important prior to reduction to distinguish between unstable and stable frx intertroch fractures; – w/ cortical instability on one side of frx owing to cortical overlap or destruction, frx … Read more
– Discussion: – unicompartmental arthroplasty serves a specific nitch for knees that are too severe for arthroscopic management of medial DJD (see mosaicplasty) but are not severe enough for total knee replacement; – best indications: – UKR for patients with partial thickness cartilage loss in the affected compartment. – The implications of damage to the lateral … Read more
– See: – Facet Joint Injuries – Hyperflexion Injuries – Oblique projections; – Pillar View – Discussion: – simple unilateral facet dislocation is often a stable injury, eventhough there is disruption of the posterior ligament complex (involved joint capsule, posterior longitudinal ligament, … Read more
– Discussion: – impingement of distal ulna on carpi which may arise from positive ulnar variance or non union of distal ulnar frx; – positive ulnar varience leads to loading of the ulnocarpal joint and resultant LT disruption, lunate chondral lesion, and TFCC tears; – diff dx: (ulnar sided … Read more
– See: biomechanics menu: – Discussion: – maximum load that metal can withstand in a single application without breaking; – w/ application of a load, maximum stress will be achieved; – this is ultimate tensile strength, & is maximum stress material can sustain before fracturing; … Read more
Discussion allows assessment of DVT from the external iliac vein down to the popliteal veins visualization distal to the popliteal veins is usually not possible may be able to detect patency of major vessels, but it is not effective for smaller vessels will not diagnose pelvic thrombi note that clots seen on ultrasound comprise a … Read more
– Discussion: – press fit femoral stem main discussion – coating press fit femoral stem; – to maintain bone stock, proximal stress transfer must be a prominent feature of any cementless implant system; – proximal part of femur is often exposed to high longitudinal strain, & bone … Read more
– See: RU joint – Discussion: – refers to impingement of the ulnar head against the carpi which can lead to TFCC tears and lunotriquetral ligament attrition; – lunotriquetral ligament attrition may occur from compression and translation shear as the lunate becomes impinged against the ulnar head; – causes: … Read more