To develop a non-human primate model of systemic bone loss after ovariectomy, 24 ovariectomized (OVX) and eight control (non-OVX) female baboons Papio ursinus were investigated over a period of 48 months using bone mineral density (BMD), iliac crest bone histomorphometry, bone turnover markers, and variables of calcium metabolism. Lumbar spine (L1-L4) BMD measured by dual energy X-ray absorptio...

OBJECTIVE To study the influence of physical impairments on hip bone mineral density in women with Parkinson's disease. DESIGN Cross-sectional study. SUBJECTS/PATIENTS Thirty-four women with Parkinson's disease and 30 age-matched healthy controls. METHODS Patients with Parkinson's disease underwent a hip scan using dual-energy X-ray absorptiometry and total hip bone mineral density values...

To describe a new procedure of total hip replacement in patient with severe developmental dysplasia of the left hip, using technique of acetabular reconstruction with autogenous bone grafts and subtrochanteric shortening femoral osteotomy. Total hip replacement done in January of 2003. The Eftekhar's classification was used and included type D, neglected dislocations. Bone graft incorporated in...

of vitamin K were not affected by fractures in its acute phase. Bone formation markers did not change during the acute phase of hip fracture. Bone resorption markers increased on the third day. Biochemical markers of bone turnover were not affected for at least 48 h after fracture. Therefore, the values of those measurements during the first 48 h after fracture appear to reflect bone metabolism...

The postcranial skeleton of modern Homo sapiens is relatively gracile compared with other hominoids and earlier hominins. This gracility predisposes contemporary humans to osteoporosis and increased fracture risk. Explanations for this gracility include reduced levels of physical activity, the dissipation of load through enlarged joint surfaces, and selection for systemic physiological characte...

BACKGROUND This is a cohort trial (1997-2005) of 49 patients submitted to an acetabular component revision of a total hip arthroplasty, using impacted human and bovine freeze-dried cancellous bone grafts (H&FDBG) and a reinforcement device. OBJECTIVE To compare clinical/radiographic graft incorporation capability between cancellous bone grafts. PATIENTS/METHODS There were two groups: I (n=2...

OBJECTIVE To examine differences in bone mass between children and adolescents swimming competitively at nonelite levels (locally and regionally) and nonathletes and to assess changes in bone mass in these 2 groups over 24 months after taking into consideration several known confounders of bone mass. DESIGN Observational prospective study. PARTICIPANTS White nonelite swimmers (n = 128) and ...

INTRODUCTION Stress-shielding following uncemented hip replacement causes bone remodelling due to alteration of the load transfer pathways. The degree of bone resorption is related to the geometry and bending stiffness of the stem. Large diameter, cobalt chrome stems are attributed with producing the most pronounced bone loss. The Epoch hip prosthesis (Zimmer Inc., Warsaw, IN) is a low bending ...

PURPOSE To describe bone status and analyse bone mass in adolescent cyclists. METHODS Male road cyclists (n = 22) who had been training for a minimum of 2 years and a maximum of 7 years with a volume of 10 h/w, were compared to age-matched controls (n = 22) involved in recreational sports activities. Subjects were divided in 2 groups based on age: adolescents under 17 yrs (cyclists, n = 11; c...

Total hip arthroplasty (THA) is a successful method to treat osteoarthritis secondary to the developmental dysplasia of the hip (DDH). As anatomic deformity of acetabulum, anatomic hip center placing of the socket may lead insufficient host bone coverage, therefore, high hip center (HHC) technique is an alternative choice. Location of the hip rotation center can be referenced by inter teardrop ...