Hip Arthroplasty for Osteonecrosis of the Femoral Head
Male and female combined Age (years) 34.2 (18–51) Weight (kg) 74.6 (40–120) Femoral component size (mm) 49.2 (40–54) Charnley class A 17 (37 %) B 22 (48 %) C…
Treatment of Osteonecrosis of the Hip and Knee with Enoxaparin
Fig. 32.1 Reversible pathogenesis of osteonecrosis Table 32.1 Screening tests for thrombophilia, hypofibrinolysis, and impairment of nitric oxide production Thrombophilia PCR studies G1691A Factor V Leiden G20210A prothrombin C677T/A1298C MTHFR…
Bone Marrow Edema Syndrome of the Hip
Fig. 30.1 A core biopsy specimen of bone marrow edema syndrome (stain, hematoxylin and eosin; original magnification, ×100) shows hematopoietic cells are depleted and fatty cells are necrotic in the…
Principles of Core Decompression for Osteonecrosis of the Hip
Direct risk factors Trauma – fracture, dislocation Sickle cell disease Human immunodeficiency virus infection Chemotherapy Radiation Indirect risk factors Corticosteroids Alcohol abuse Tobacco use Systemic lupus erythematosus Myeloproliferative disorders Gaucher’s…
Impaction Bone Grafting
Fig. 41.1 At 1 cm distal to the vastus ridge, a guide pin is inserted to the direction of the center of necrosis under the guidance of the image intensifier…
The Epidemiology and Etiology of Perthes’ Disease
Fig. 58.1 Regional incidence of Perthes’ disease per 100,000 children aged <15 years, 1964–2009. Studies are ordered by latitude. CI confidence interval, IR incidence rate, UK United Kingdom, US United…
Vascularized Pedicle Iliac Bone Grafting for Osteonecrosis of the Femoral Head
Fig. 43.1 Superselective angiography. The deep circumflex iliac (DCI) artery is shown The external diameter of the DCIA is usually around 2–2.5 mm and can be easily handled without microscopic…
Posttraumatic Osteonecrosis of the Femoral Head
Fig. 15.1 Plain radiographs of a 45-year-old man with right femoral osteonecrosis show linear sclerosis (arrow) in the right femoral neck (a, b). These look like a femoral neck fracture…
Developing Medical Therapy for Legg-Calvé-Perthes’ Disease
Fig. 62.1 An experimental study of the pathogenesis of femoral head deformity following ischemic osteonecrosis of the immature femoral head in the piglet model. (a) Radiographs of the central region…
Multifocal Osteonecrosis
Risk factors for multifocal osteonecrosis 1. Corticosteroid use 2. SLE 3. Sickle-cell disease 4. HIV infection 5. Alcohol abuse 6. Multiple sclerosis 7. Coagulation disorders 8. Inflammatory bowel disease 9….
