Ortho Oracle - orthopaedic operative atlas

Non Union of Humeral Fractures

– Discussion: – Non Union – General Discussion: – definition of fracture union: defined as bridging callus (ideally both cortices) on 2 orthogonal views with the disappearance of fracture lines – care must be taken not to mistake a pseudoarthrosis for a simple hypertrophic nonunion; – treatment of the pseudoarthrosis requires complete resection of the synovial tissue, and … Read more

Nonossifying Fibroma

– Discussion:     – also known as fibrous cortical defect;     – most common bone lesion (40% children);     – it results from defect of periosteal cortical bone development which leads to failure of ossification;     – natural history:             – lesion typically develops in childhood … Read more

TKR: Non Resurfaced Patella

– Non Resurfaced Patella Considerations:       – eventhough non resurfaced patella gives good clinical results, in some patients, the added thickness of the native patella interferes with              surgical exposure for the rest of the case (which can compromise subsequent bone cuts);       – patellar decompression:                     – The efficacy of patellar decompression for improving anterior … Read more

Non Union

– See:           – Humeral Fracture Non Union           – Tibial Non Unions           – Femoral Shaft Non Union    – Discussion:      – see bone healing and bone blood supply     – definition: fracture that lacks potential to heal without further intervention            – frx of shaft of long bone should not be considered nonunion until at … Read more

Non Tumerous Soft-Tissue Masses

– Discussion:     – blood has has high-signal intensity on T1;     – areas of high-signal intensity on T1 images generally are fat or blood;     – abscesses tend to have low-intensity capsule on both T1 & T2  images     – signal intensity of fluid may vary, depending on the protein … Read more

Non Dissociative Carpal Instability

– See: carpal instability – Discussion:     – refers to a proximal row instability which occurs in the absence of instability between the individual proximal carpi;            – ie, the scapholunate and lunotriquetral intervals are normal;     – potential sites of pathology:            – capitolunate … Read more