Improving Hip Replacements - Science At Work

Conventional hip replacement implants are made of polyethylene, which is a multichain polymer with an ultra-high molecular weight. By virtue of its polymer design and high molecular weight, it possesses great strength and durability. The inherent chemical properties render it biocompatible, preventing the danger of tissue reaction. In spite of being abrasion resistant, the polyethylene implant undergoes wear and tear, releasing debris particles. The debris particles of the implant create a bone gap, with due course of time causing loosening of the joint and painful hips. This generates a dire necessity for improving hip replacements.

Hip replacements were formerly targeted for old age people, who by default, may not require a revision hip implant surgery. Today, the target population is young, more active and has a longer life span. Improving hip replacement methods intends to increase endurance and mechanical performance of the implants. The day-to-day activity exerts activity-related stress on the hip replacements; an ideal implant should be strong enough to withstand this stress.

The field of biotechnology is actively conducting research studies to improve the mechanical and structural reliability of the hip replacement implants. The polyethylene is being tested to improve its tensile strength. The polymer is also under investigation for static and fatigue properties by exposing it to off-load and on-load experiments. The researchers have also questioned the mode of sterilization for the implant, which is necessary to prevent contamination. It was found that current practice of using gamma rays for sterilization alters its molecular structure and may hamper the implants durability. An alternative to gamma radiation sterilization is now preferred.

Also see; hip replacement operation.

About The Author:

Dr. Bharat Sharma is a successful author and regular contributor to http://www.hip-replacement-care.com. He has been working in the medical rehab field for more than a decade. Keeping up to date with techological advancements he has become a self appointed expert.