0
Polyethylene is a plastic, not metal.
In fact, polyethylene is the most common plastic now-a-days.
Wiki User
∙ 9y ago
Add your answer:
Earn +20 pts
Is a hip replacement cup made of ceramic?
Hip replacements are made of different parts. The stem (portion that goes into the thigh bone) The head and cup (the bearing surface) The socket (portion that holds the cup into the pelvis). The stem is always metal. Usually a cobalt chrome alloy. This may either be coated with titanium or a cermaic such as hydroxyapatite (rough surface) which allows bone to grow onto the stem and hold it fixed in place. Or the stem can be highly polished and cemented in place with polymethylmethacrylate cement. The socket can either be all polyethylene (usually UHMWPE) and cemented into the pelvis directly (i.e. the cup and socket are one), or the socket can be metal and bond to the pelvis in the same way as the rough stems, with or without the use of screws. The bearing surface (ball and cup) can vary - The ball can either be metal or ceramic (alumina), and the socket can either be metal, ceramic or polyethylene (UHMWPE). The polyethylene cups can either be an all in one cup/socket, or a polyethylene liner to a metal socket. The bearing combinations typically used are: Metal on polyethylene Metal on Metal Ceramic on Ceramic Ceramic on polyethylene All have their pros and cons.
Which is stronger Polyethylene or dyneema?
Polyethylene Which is stronger Polyethylene or dyneema?
What are the polymers formed from Ethene?
ethane is a precursor to ethylene which is polymerized to form polyethylene
Which is best metal or ceramic hip replacement?
There are quite a few variables here 1. There are two versions of each. Metal on metal and metal on polyethylene and ceramic on ceramic and ceramic on polyethylene 2. Polyethylene wears out quicker then either metal or ceramic 3. There is currently a massive recall of metal on metal hip implants. These tend to shed minute particles which can cause rejection of the implant and can enter the bloodsream. The plus side for metal on metal is that they can use larger cups (pelvis side of the joint) which means they are less likely to dislocate. Though rate of dislocation will depend on other factors as well e.g. surgical approach used. 4. Ceramic has a long life span but in a few cases makes a horrible squeaking noise and in even rarer cases they can shatter - known as catastrophic failure! Like metal on metal they can use a larger cup size. Ceramic and ceramic is probably now the current favourite If I had to chose I'd definitely go for ceramic on ceramic.
Is polyethylene a thermosetting or thermoforming plastic?
Polyethylene is a thermoplastic polymer.
What is the difference between polyethylene and polyester?
what is the main difference between polyethylene and polyesters what is the main difference between polyethylene and polyesters
Why you do not use polythene?
Polythene (polyethylene) is largely used around the word. Now we can produce biodegradable polyethylene or we can recycle the polyethylene.
Which has more crystalline branched or linear polyethylene?
The cystalline branched polyethylene has got a complex structure than a linear polyethylene.
What type organic compound is polyethylene?
Polyethylene is a polymer of ethene. It is a macro molecule.
What are the ingredients in polyethylene terephthalate?
The components used to make Polyethylene terephthalate is plastics. They take recycled plastics and mold them into polyethylene terephthalate. If you want the chemical formula for polyethylene that would be (C10H8O4)n.
What stops a tin can from corroding?
They are coated with Linear Low Density Polyethylene Liners which keeps the acids from making contact with the metal.
What chemical element makes up polyethylene?
Polyethylene contain hydrogen and carbon.
