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At least 991 records · Page 55Linked to original sources
PubMed1989

[Arthroplasty of the hip joint using demineralized osteo-cartilaginous allogeneic caps (experimental study)].

The authors have carried out an experimental study of demineralized osteochondrous allocaps (DOCA) for the arthroplasty of the hip joint. The articular cartilage was removed completely in 10, partly from the head in 5 and from the entire cavity in 2 of the 15 rabbits. The animals were excluded from the experiment at various terms (from 2 weeks to 10 months). It has been morphologically determined that when DOCA were employed, the regeneration of the articular cartilage of the head was most complete in cases of its focal resection. When the articular cartilage of the head was completely removed, the cartilaginous regenerate did not possess the mechanical properties of the normal one and was subjected to secondary degenerative and dystrophic changes. The best results were obtained in cases when plasty of the cavity with DOCA was performed. The signs of regeneration of the cartilage under the DOCA and its absence on the surface without the caps testify to chondroinductive properties of DOCA.

Animals↗
PubMed1993

Total hip joint replacement using a CoCrMo metal-metal sliding pairing.

Late loosening in total hip replacement is explained by a foreign body reaction of the connective tissue along the bone-implant interface due to polyethylene debris. In contrast, metal-metal prostheses of the McKee type implanted in the sixties, may still work perfectly today without any signs of osteolysis along the bone-cement interface, proving that metal-metal pairing is superior to prostheses with polyethylene cups and proving also that cement anchorage may be adequate for fixation. A new metal-metal total hip joint is presented, that has been implanted 90 times between 1988 and 1991.

Chromium Alloys↗
PubMed1989

[Early signs of arthrosis of the hip joint in MRT].

The hips of 8 young volunteers were investigated with high resolution MRI. The purpose of this study was to establish an imaging protocol to visualize hyaline cartilage, synovial fluid, and subchondral bone with optimized contrast. Spin Echo (SE) and Gradient Echo (GE) sequences were compared. FISP with a flip angle of 70 degrees was superior to the other techniques. The same sequences were applied on 45 volunteers aged 65-93 years. Early signs of degenerative arthritis of the hip were demonstrated as thinning, variable signal intensities within the cartilage layer, and cartilage loss. MRI of the hip may be a useful tool for the detection of early degenerative cartilage damage which cannot be documented with conventional x-rays.

Adult↗
PubMed1988

[Para-articular fracture of the hip joint in the aged--an indication for immediate operation?].

177 patients with fractures near the hip joint were operated on between January 1983 and December 1985. The fractures were treated with Ender pinnings, total endoprostheses and dynamic hip screws (compression screw fixation). Up to June 1984 surgery was performed after the patients had been allowed a stabilisation phase of 4 days on the average, but from July 1984 onwards we aimed at performing immediate surgery within 12 hours. The second group was compared with the first group in a retrospective study in respect of recumbent period and mortality (hospital mortality and mortality after 8 months). The period during which the patients had to remain recumbent in the hospital was found to be considerably shorter, but there were no statistically significant differences in respect of mortality. The causes and consequences are discussed.

Aged↗
PubMed1995

Iliopsoas bursa of the rheumatoid hip joint. A case report and review of the literature.

Presented is the case of a 63-year-old woman, with a 30-year history of rheumatoid arthritis, whose hip was completely destroyed and accompanied with enlargement of the iliopsoas bursa. Preoperative diagnosis was confirmed by computed tomography, magnetic resonance (MR) imaging and arthrography. She was treated by resection of the iliopsoas bursa and total prosthetic replacement of the hip joint. The pathogenesis is uncertain. In the literature, enlargement of the iliopsoas bursa with rheumatoid arthritis, osteoarthritis, pigmented villonodular synovitis, and synovial chondromatosis had been reported. Nevertheless, a correct preoperative diagnosis of the enlargement of the iliopsoas bursa is very difficult. MR imaging with enhanced Gadolinium-DTPA (Gd-DTPA) is proposed as the most useful examination for preoperative diagnosis.

Arthritis, Rheumatoid↗
PubMed1996

Quantitative radiography in osteoarthritis: computerized measurement of radiographic knee and hip joint space.

Radiographic joint space narrowing is the hallmark of progression in osteoarthritis (OA). An accurate measure of progression for OA requires a precise quantitative method. New techniques have been designed to quantitatively assess knee and hip joint space using computer analysis of digitally stored radiographs. The interobserver coefficient of variation of the technique ranges from 1% to 3.3% and is clearly better than that obtained by the use of dividers and rule. A precise standardization of the radiological procedure as well as use of films of good quality are required for a good reproducibility of the method. The computerized measurement of joint space size from standard radiographs is applicable to monitor progression of hip and knee OA, and appears to be of value in the evaluation of disease-modifying therapies for OA.

Arthrography↗
PubMed1992

Imaging of the hip joint. Computed tomography versus magnetic resonance imaging.

The authors reviewed the applications and limitations of computed tomography (CT) and magnetic resonance (MR) imaging in the assessment of the most common hip disorders. Magnetic resonance imaging is the most sensitive technique in detecting osteonecrosis of the femoral head. Magnetic resonance reflects the histologic changes associated with osteonecrosis very well, which may ultimately help to improve staging. Computed tomography can more accurately identify subchondral fractures than MR imaging and thus remains important for staging. In congenital dysplasia of the hip, the position of the nonossified femoral head in children less than six months of age can only be inferred by indirect signs on CT. Magnetic resonance imaging demonstrates the cartilaginous femoral head directly without ionizing radiation. Computed tomography remains the imaging modality of choice for evaluating fractures of the hip joint. In some patients, MR imaging demonstrates the fracture even when it is not apparent on radiography. In neoplasm, CT provides better assessment of calcification, ossification, and periosteal reaction than MR imaging. Magnetic resonance imaging, however, represents the most accurate imaging modality for evaluating intramedullary and soft-tissue extent of the tumor and identifying involvement of neurovascular bundles. Magnetic resonance imaging can also be used to monitor response to chemotherapy. In osteoarthrosis and rheumatoid arthritis of the hip, both CT and MR provide more detailed assessment of the severity of disease than conventional radiography because of their tomographic nature. Magnetic resonance imaging is unique in evaluating cartilage degeneration and loss, and in demonstrating soft-tissue alterations such as inflammatory synovial proliferation.

Arthritis↗
PubMed2004

Study of local blood flow and pressure in tissues and vessels of hip joint of experimental animals.

Acute experiments on dogs showed that clamping of the femoral artery below origination of its deep branch playing the leading role in blood supply to the hip joint increases local blood flow in femoral head due to redistribution of arterial flow in favor of the deep femoral artery. This fact is essential for the development of surgical methods for the treatment of patients with aseptic necrosis of the femoral head.

Animals↗
PubMed1997

Cartilage and bone macromolecules in knee joint synovial fluid in rheumatoid arthritis: relation to development of knee or hip joint destruction.

OBJECTIVE: To examine the hypothesis that aggrecan, cartilage oligomeric matrix protein (COMP), and bone sialoprotein (BSP) concentrations in synovial fluid could provide information on variations of progression of joint destruction in rheumatoid arthritis. METHODS: Aggrecan, COMP, and BSP were quantified by enzyme linked immunosorbent assays in longitudinally collected knee joint synovial fluid samples of patients rapidly developing destruction in knees or hips, the "'destructive" group, n = 18, and in patients slowly developing destruction, the "non-destructive" group, n = 25. RESULTS: The aggrecan concentrations decreased from initially high levels (P < < 0.001), and the BSP concentrations increased (P < < 0.001) over time in the destructive group, whereas levels of both markers were low and did not change in the non-destructive group. The COMP levels did not change in any of the groups. The aggrecan concentrations were initially highest in the group developing destructions (P < < 0.001), whereas no difference between the groups was found regarding levels of COMP or BSP in the first sample. CONCLUSIONS: A destructive group was characterised by higher initial aggrecan concentrations and rising BSP concentrations in synovial fluid with time. Quantification of cartilage and bone derived macromolecules contributes to the assessment of extent of tissue destruction and may help in the early identification of patients at risk of rapidly progressing destruction.

Adult↗