periodic evaluation and monitoring the health and economic outcome of joint replacement surgery is a common and popular process under the territory of joint registries in many countries. in this article we introduce the methodology used for the foundation of the national iranian joint registry (ijr) with a joint collaboration of the social security organization (sso) and academic research depar...

Hip replacement is a surgical procedure in which the hip joint is replaced by a prosthetic implant. Hip replacement surgery can be performed as a total replacement or a hemi (half) replacement. This can relieve pain, help hip joint work better, and improve walking and other movements. Now, hip replacement surgery is performed over 300,000 times each year in the U.S. to repair severe hip damage ...

The hip joint is a deep joint surrounded by large and powerful muscles necessary for its proper function. Essential neurovascular structures lie in front and in back of the hip. For man's normal daily activities the hip is perhaps the most important joint that he possesses. It is estimated that when one takes a step on the leg in normal walking, forces are transmitted across the hip approximate...

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BACKGROUNDS A two-stage revision arthroplasty was suggested optimal treatment for deep infections in hip joint. The effect of endoskeleton of cement spacers on the interim function and infection control remains unclear. METHODS From Jan. 2004 to Dec. 2007, we collected a prospective cohort of consecutive 34 patients who treated with two-stage revision total hip arthroplasty for deep infection...

  Background: The aim of this study was to investigate muscle damage indicators and electromyography activities of quadriceps muscles at 25° of hip flexion in untrained healthy females after an eccentric exercise induced muscle fiber damage.   Methods : A total of 14 healthy females participated in this pre-experimental study. The subjects performed maximal eccentric quadriceps contractions at ...

The hip is a unique joint that possesses both mobility and stability because of its anatomic configuration. This joint is crucial to athletic activities involving the lower extremity, such as running, jumping, and kicking, as well as to the generation and transference of forces for activities involving the upper extremity. The tremendous loads that the hip withstands result from muscular, gravi...

Higher and unevenly distributed contact stress in the hip-joint is a risk factor for the development of arthrosis.1,2,3 There are several biomechanical parameters that describe the distribution and the peak value of the stress in the hip joint, such as the gradient of the stress at different positions of the articular surface or the maximal value of the pressure on the articular surface of the ...

his article describes our ongoing efforts in computer-aided surgery. We are developing and testing a biomechanical guidance system that will interact with the surgeon and report the biomechanical state of the joint during hip surgery. The system uses information from the imagery of a computer-assisted navigation system and displays the contact pressure distribution in the hip joint as the joint...