– Discussion: – typically the posterior column remains intact w/ a burst frx; – w/ severe injury, anterior angulation may damage posterior ligamentous ligament complex, creating an unstable burst frx; – w/ further axial loading, inferior facets of upper vertebrae wedge apart superior facets and pedicles of the fractured … Read more
– Discussion: – larger than the anterior and middle facets and is convex in shape; – tarsal canal separates the posterior facet from the anterior and middle facets; – Radiographs: – medial oblique axial view: – demonstrates middle & post facets of sub-talar joint; … Read more
– See: – Classification and Column Theory – Posterior Wall Fractures – AO Foundation Posterior Column Frx – Discussion: – posterior column extends from obturator foramen thru posterior aspect of the wt bearing dome of acetabulum & then obliquely through greater sciatic notch; – frx of … Read more
– Indications: – displaced type II dens frx; – note that if posterior C1-C2 fusion is begin considered for type II dens frx, it is important to ensure that there is not a concomitant C1 arch frx; – Anatomy: – vertebral arteries: – … Read more
– Discussion: – includes lamina, pedicles, spinous processes, including supraspinous and intraspinous ligaments, ligamentum flavum, & facet capsules; – Clay Shoveler’s fx – Ligamentous Instability: – consists of combined role of right & left Facet Joint & lateral masses in resisting compression; – ligamentous complex in posterior motion segment resists … Read more
– See: – Anterior Approach Shoulder – Post Approach to Humerus – Discussion: – indicated from frx of the scapula, esp when the pathology is posterior; – Technique: – positon the patient in the prone or lateral position; – skin incision is made … Read more
– Discussion: – cervical kyphosis is a general contra-indication for posterior decompression; – Surgical Approach: – prone position using Mayfield head holder w/ neck in neutral; – during operative procedure, erector spinae muscles should not be dissected laterally beyond the facets; – this avoids … Read more
– Diff Dx: – Achilles Tendonitis – Achilles Tendinosis – Os Trigonum / Posterior Impingement – Posterior Talar Process Fracture – FHL Tendonitis – Peroneal Tendonitis – Tibialis Posterior Tendonitis – Deltoid Ligament Sprain – Osteochondral Lesions of … Read more
– See: Multisegmented Hook Instrumentation – Discussion: – reduction of retropulsed bone from the canal requires that posterior longitudinal ligament be intact to provide tension; – when distracted, ligament pulls bone out of the canal anteriorly toward the body; – this technique is generally … Read more
– See: Posterior Approach for Pelvic Frx – Indications for Use: – isolated posterior wall & posterior column frxs; – allows access to posterior column and posterior wall only, but exposure is limited proximally by superior gluteal vessels and greater trochanter; – isolated transverse frx (as well … Read more