– Discussion: – AKA – NSNA, Cat-Cam, with a narrower medial – lateral designs will share load w/ gluteal structures & greater trochanteric; – ischium and the ramus are contained within the socket of these newer, more anatomic, and more functional designs; – narrow medial-lateral above knee … Read more
– Discussion: – remove residual cancellous bone along medial aspect of neck w/ broaches; – begin w/ broach at least two sizes smaller than anticipated stem; – procede w/ consecutively larger broach sizes up to but not exceeding size of the last axial reamer; … Read more
– Broaching: – broaching for cementless stems – is usually started w/ the smaller broach or w/ broach 2 sizes smaller than templated during preop planning – determination of anteversion – exposure considerations: – with smaller incisions, there will be a tendency of the broach to abraid … Read more
– Discussion: Stem Failure – stem fractures are much less common now with stronger alloys; – cracks commonly begin on anterolateral surface of femoral component; – frx usually begins in the middle 1/3 of anterolateral aspect of the stem and progresses medially; – factors … Read more
– See: – Phalangeal Injuries – Rheumatoid Boutonniere – Thumb Boutonniere Injuries – Discussion: – an aquired lesion of the extensor mechanism, in which the PIP joint develops a flexion deformity and the the DIP joint develops an extension deformity; … Read more
– See: Total Hip Replacement Menu: – General Discussion of Bone Scans: – Normal THR: – normal study (minimal reative bone formation) may be expected from months to a year after placement; – area of lesser trochanter to midshaft of prosthesis usually becomes normal in about … Read more
Discussion for detection of AVN, technetium-99 methylene-diphosphonate bone-scanning is a useful technique; bone-scanning may be less sensitive in the detection of AVN at early stage of the disease or when both hips are involved symmetrically; reactive of bone at the edge of the infarcted segment will show an increased uptake of the isotope on the … Read more
– Discussion: – bone marrow signal on T1- and T2 vary with age – in adults, tumor invading bone marrow will show decreased signal on T1, in contrast to normally high signal-intensity bone marrow; – its imporant to note that traumatic, inflammatory, and neoplastic disorders will … Read more
– See: – Bone Patella Bone Allografts – Non Bone Patella Bone Reconstruction – Discussion: – Anatomy of ACL; – ACL Biomechanics; – Graft Tunnel Sites / Isometry: – Graft Biomechical Characteristics: – … 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