Ceramic implant is a newer model than the metal implants and staying digadang as the best. But based on reviews of medical evidence has been found that ceramic implants on metal hip replacement was no better than the traditional model with plastic joints.
The results of recent study found a new design in ceramic implants do not increase the quality of life of patients or their ability to perform daily activities. The new peneltian results have been published in the British Medical Journal.
Materials used in implants depends on several factors, including patient age, patient activity level and surgeon preference.
Hip implant design and materials, among others:
1. Metal and plastic implants
2. Metals and metal implants
3. Ceramics and ceramic implants
4. Metal implants and highly crosslinked polyethylene
Metal Implants
Metal and plastic implant is a traditional hip implant designs most commonly used. The hip joint is replaced with a metal prosthesis, and a plastic spacer placed in between.
Metals used include titanium, stainless steel, chrome and cobalt. Plastic material used is called polyethylene. Metals and metal implant designs using the same materials, but no plastic inserted between them.
Ceramic Implants
While the design of ceramics and ceramic implants are designed to be the most wear resistant of all hip replacement implants available. Ceramic is more scratch resistant and smoother than other implant materials.
Some studies suggest that, the new model is associated with higher rates of follow-up surgery to overcome the mechanical problems such as dislocation or too loose.
Traditionally, metal or ceramic implants in hip joints with plastic surfaces. But now, implant design using metal to metal or ceramics with ceramic.
"Even a successful hip replacement surgery may require surgical repair in 10 years due to causes such as infection and instability. But for the old design implant surgery repair rate is quite low. Based on the medical evidence is still not clear benefit of the new implant designs. Yet There are also serious cases of metal implants in patients with metal on metal design and joints, "the researchers said as quoted by the Telegraph, Thursday (12/01/2011).
Review of medical evidence hip implants have been approved by the American Food and Drug Administration (FDA) two years ago to compare the implant materials are most effective.
A team of researchers have compared the results of 18 studies, involving 3139 patients and more than 830,000 operations of the annual report. The results showed that, patients with a new implant design has no significant benefit in the ability to use their feet or quality of life compared with patients with traditional implant design.
The results also showed that, the metal on metal implants caused less likely to dislocate. But in the majority of patients showed that, the joint design requires repair operations as a whole.
"There is little evidence regarding the comparative effectiveness of different bearing hip implants. The results do not indicate the presence of excess metal design with a metal or ceramic bearings with ceramic compared to the traditional," the researchers said.
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