objective(s): studies have reported that whole body vibration (wbv) played a vital role in bone remodeling. circulating serotonin is also involved in negative regulating bone mass in rodents and humans. however, both wbv and inhibition of serotonin biosynthesis may suppress receptor activator of nuclear factor-kappab ligand (rankl)-induced osteoclastogenesis in vitro . the purpose of the curren...

background: ligament reconstruction is a common procedure in orthopedic surgery. although several popular techniques are currently in use, new methods are proposed for secure fixation of the tendon graft into the bone tunnel. purposes: we sought to introduce our new technique of bashti bone plug for fixation of soft tissue graft in anterior cruciate ligament (acl) reconstruction and to compare ...

objective(s):various methods for repairing bone defects are presented. cell therapy is one of these methods. bone marrow stromal cells (bmscs) seem to be suitable for this purpose. on the other hand, lots of biomaterials are used to improve and repair the defect in the body, so in this study we tried to produce a similar structure to the bone by the chitosan and hydroxyapatite. materials and me...

Numerous unfavorable factors that disturb the balance between resorption and bone formation affect bone mechanical strength. Also mechanical loading (body mass and muscle tension) and risk factors for osteoporosis affect bone strength. Loading that can be applied to the bone is limited by bone structure. At the same time, loading applied to the bone may condition its structure. This is possible...

A study was conducted to evaluate effects of different bone preparation methods on bone parameters and the correlations between bone breaking strength and the other bone parameters. Bone breaking strength is dramatically changed depending on bone preparation methods, whereas other bone parameters such as ash content and ash concentration are not significantly influenced by bone preparation meth...

H.Schießl, J. Willnecker Ph.D. Stratec Medizintechnik GmbH Durlacher Str. 35 D-751 72 Pforzheim, Germany According to the mechanostat theory, the mechanical loads on bones help to determine bone strength, and the largest loads come from muscle forces. Indeed, recent studies found that muscle strength and the bending strength of bone are highly correlated (r>0.93), and bone ,,mass“ and muscle ma...

The clinical tools available to evaluate bone development in children are often ambiguous, and difficult to interpret. Unfortunately bone densitometry methods (i.e., dual energy X-ray absorptiometry, DXA) which have a relatively straightforward application in adult osteoporosis, are far more difficult to evaluate in the growing skeleton. Even with adequate "adjustment" for bone size or maturity...