Association between apoptotis and CD4(+)/CD8(+) T-lymphocyte ratio in aseptic loosening after total hip replacement.

Particle-induced osteolysis is a major cause of aseptic loosening after total joint replacement. While the osteolytic cascade initiated by cytokine release from macrophages has been studied extensively, the involvement of T-lymphocytes in this context is controversial and has been addressed by only a few authors. In a former study we detected that the quantity of T-lymphocytes may be influenced by apoptosis in patients with aseptic loosening.

Complication of a closed Colles-fracture: necrotising fasciitis with lethal outcome. A case report.

We report a case of a 77-year-old female patient who died 4 days after a closed colles-fracture of the right wrist because of secondary emerged necrotising fasciitis. At the time of visiting our emergency department, the patient reports about untypical pain and progressive swelling of the entire right arm 3 days following a fall onto the outstretched hand where she sustained a closed distal radius fracture. Within 6 h, the patient developed hypotension and fever leading to cardiac and respiratory failure.

The density of nociceptive SP- and CGRP-immunopositive nerve fibers in the dura mater lumbalis of rats is enhanced after laminectomy, even after application of autologous fat grafts.

A considerable number of patients complain about pain after lumbar surgery. The spinal dura mater has been debated as a possible source of this pain. However, there is no information if laminectomy influences the nociceptive sensory innervation of the dura.

Osseointegration of cementless implants with different bisphosphonate regimens.

Some evidence suggests a daily dose of bisphosphonates improves fixation of cementless metal implants by enhancing osseointegration. Because the necessity of daily administration may result in suboptimal adherence to therapy, single- dose administration is desirable. We examined whether a dose-equivalent single injection of the nitrogen-containing bisphosphonate ibandronate is as effective as a daily injection in improving the osseointegrated surface and enhancing periprosthetic bone mineralization (bone volume to tissue volume) of cementless metal implants.

Suppression of polyethylene particle-induced osteolysis by exogenous osteoprotegerin.

Alterations of the key regulators of osteoclastogenesis, receptor activator of NF-kappaB (RANK), RANK ligand (RANKL), and osteoprotegerin (OPG) have been implicated in wear particle-induced osteolysis, the most common cause for implant failure in total joint replacements. This study investigated the effect of exogenous OPG on ultra-high-molecular-weight polyethylene (UHMWPE) particle-induced osteolysis. The murine calvarial osteolysis model was utilized in 28 C57BL/6J mice randomized to four groups.

Promotion of bone formation by simvastatin in polyethylene particle-induced osteolysis.

The effects of statins on bone formation in periprosthetic osteolysis have not been determined to date. We investigated the effect of the HMG-CoA reductase inhibitor simvastatin on osteoblastic bone formation under conditions of ultra-high molecular weight polyethylene (UHMWPE) particle-induced osteolysis. The murine calvarial osteolysis model was utilized in 21 C57BL/J6 mice randomized to three groups.