A novel method for bone fatigue monitoring and prediction.

Bone fatigue, often manifest as stress fractures, is a common injury that plagues many individuals, adversely affect quality of life, and is an obstacle to extended human spaceflight. This manuscript details a pilot study that was conducted to determine if the Phase Space Warping (PSW) methodology could be used to monitor/predict fatigue failure in bone tissue. A Moon's beam experimental apparatus was used to perform variable amplitude fatigue tests on bovine bone specimens.

Damage accumulation of bovine bone under variable amplitude loads.

Stress fractures, a painful injury, are caused by excessive fatigue in bone. This study on damage accumulation in bone sought to determine if the Palmgren-Miner rule (PMR), a well-known linear damage accumulation hypothesis, is predictive of fatigue failure in bone. An electromagnetic shaker apparatus was constructed to conduct cyclic and variable amplitude tests on bovine bone specimens.

Development of photochemical method for meniscal repair: a preliminary study.

Visible light combined with naphthalimides has previously been shown to catalyze formation of physical bonds in avascular meniscal tissue. The first objective was to modify the existing in vitro testing method (i.e.

Assessing the dog as a model for human total hip replacement: analysis of 38 postmortem-retrieved canine cemented acetabular components.

Thirty-eight cemented acetabular components that had been clinically implanted in client-owned dogs were retrieved postmortem and analyzed for mechanical stability, volumetric wear, and articular surface damage. Comparison of the results from this study with similar studies on autopsy-retrieved human components will provide insight into the adequacy of the dog as a model for human total hip replacement (THR). The canine average volumetric wear rate (6.

Postmortem retrieved canine THR: femoral and acetabular component interaction.

Dogs are the preferred animal model for testing of human total hip replacements (THRs). A postmortem retrieval program for clinical, cemented, canine THR was established to analyze the long-term performance of THRs in dogs and to compare that performance to postmortem retrievals of human THRs. The purpose of the present study was to analyze the interaction between the femoral and acetabular components.