Ortho Oracle - orthopaedic operative atlas

STSG Donor Site

– Discussion:     – determine required thickness for the STSG:           – since a thick STSG graft harvested from donor site w/ a thin dermal thickness, may lead to a full thickness wound, as well as causing hyperpigmentation of the transplanted STSG;           – thick donor sites: posterolateral … Read more

Product Information

Stryker provides educational support to Wheeless’ Textbook of Orthopaedics.  Please see below for Stryker’s products of interest. Stryker Trauma & Extremities Surgical Technique Library   All Stryker Trauma & Extremities Products        Hip Fracture & Pelvis        Upper Extremity and Hand        Lower Extremities        Foot and Ankle        Peripheral Nerve Repair  

Stryker Notch View

          – Discussion:     – to evaluate for Hill Sachs Lesion after dislocations; – Technique:     – the patient is supine;     – a cassette is placed under the involved shoulder     – the palm of the hand of the affected extremity is placed on top of … Read more

Structural Allograft

 – structural bone grafts for hip arthroplasty:         – structural bone grafts and cemented prosthesis may be indicated when there is less than 50% of acetabular contact;          – as pointed out by Hasegawa et al 1996, when there was more than 67% of acetabular coverage in dysplastic hips, there were no revisions at 13 years;         … Read more

Stress Shielding from Femoral Components

– Discussion:     – stress shielding is the redistribution of load (and consequently stress onthe bone) that occurs when the femoral head is replaced by the             femoral component of a total hip replacement;     – stress on proximal 10 cm of femoral cortex is reduced, because much of the load bypasses this region and … Read more

Stress Fractures of Femoral Neck

– Discussion:     – stress frx of femoral neck are relatively uncommon injuries, with most reports involving military recruits & athletes who are subjected to increased physical demands;     – like most stress frx, women are most often affected and it is important to inquire about amenorrhea and occult eating disorders;     … Read more

Stress Fractures

– Discussion:     – occur as the result of repetitive loading below yeild strength & are most common in lower extremity (metatarsals > calcaneus > tibia);      – Matheson, et al.: 370 athletes with stress fractures tibia (49.1%), tarsals (25.3%), metatarsals (8.8%) and bilateral stress fractures in 16.6% of cases;     – focal structural … Read more

Stress

– Discussion:     – intensity of internal force     – stress = load / area     – stress cannot be meastured directly;     – both stress and force may be classified as tension, compression, or shear           – tension attempts to pull a substance or material apart … Read more