– 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
– See: Tibial Non Unions – Discussion: – up to 60% of high energy open tibial will fail to heal by 20 weeks, and therefore MD must decide which fractures require early bone grafting and which do not; – large tibial defects: – w/ defects less than 6 cm iliac crest bone grafting may be sufficient; … Read more
– Discussion: – blood supply to skin around the knee is random (as opposed to axial) – there are multiple small overlapping vessels that are interrupted by multiple small incisions; – random supply is sustained by both intrinsic and extrinsic sources; – intrinsic contributors to … Read more
– Discussion: – see bone circulation: – blood supply to tibial shaft is dervied from nutrient artery & periosteal vessels; – nutrient artery: – arises from posterior tibial artery as it enters into the posterior tibial cortex, distal to the soleal line at the … Read more
– See: – adolescent blounts: – growth plate anatomy – Infantile Blounts Disease: (pathologic tibia vara) – differential diagnosis and examination (see genu varum) – most common form of disease; – growth disorder of medial portion of proximal tibial physis; – … 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
– Discussion: – problem with standard BKA, the stump is often bulky and there are delays with patellar tendon prosthesis; – when healed the scar crosses the prominent crest of the tibia, which is often the point that broke down with prosthetic use; – note that the BKA prosthesis … Read more
– See: Prosthetic Feet: – PTB sockets: – provide some weight bearing support in the area of patella tendon and medial tibial flare; – BKA Suspension: – important design considerations for both sockets include – support (pressure distribution) – control (based … Read more
– Discussion: – ratio between perpendicular distance from lower articular margin of patella to tibial plateau (A) and the length of articular surface of patella (B) (use lateral view w/ knee in at least 30 deg of flexion); – AB ratio in 171 normal knees was 0.80 w/ no gender diff; … Read more