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All dental filling materials have a different coefficient of thermal expansion than natural tooth structure. Some are closer than others, but none are identical. A couple of things come into play -- one is that teeth flex slightly -- if teeth were totally brittle, and had no "give" they would always break as soon as there was a temperature difference. A second factor is that coefficient of thermal expansion depends on the amount of material -- i.e. larger/wider/longer fillings will shrink and expand more than smaller ones. In practice, fillings tend to be fairly small, so the expansion/contraction is small, and usually not clinically significant. The third major factor is that they still do expand/contract at different rates, and sometimes the result is microleakage. Microleakage is the leakage that happens between the filling material and the liner or adhesive layer that is on the tooth. Again, this is typically not a clinically significant problem, and has been researched quite extensively. The closest class of materials in terms of coefficient of thermal expansion are glass ionomer materials, followed by gold, then amalgam, and the worst is composite (at least in terms of thermal expansion). When choosing a material for a restoration, there are multiple factors, and there is not a "one size fits all" or a single best material that is perfect in all cases.
What else can I help you with?
What do dentists fill in cavities with?
wht they wont to
What do dentists do to your teeth to prevent cavities?
They put fluoride on them, but it's effectiveness is limited.
What electromagnetic waves are used to locate cavities in your teeth?
X-rays are commonly used to locate cavities in teeth. This imaging technique allows dentists to see areas of decay or cavities that may not be visible to the naked eye.
do you have freee dentures?
name specific dentists that provide fre dentures
Who is most likely to deal with oral cavities?
Dentists are healthcare professionals who are most likely to deal with oral cavities. They specialize in diagnosing, preventing, and treating issues related to the mouth, including cavities. Regular dental check-ups are essential for maintaining good oral health and preventing cavities.
What are the responsibilities of dentists?
Dentists are responsible for cleaning teeth of children and adults. They also fix crooked teeth braces and retainers and can pull teeth, as well.
Do dentists write down exactly where each cavity is on a tooth?
Yes, Dentist's record where your problem area's are. Sometimes, cavities are visual, (on the surface). Othertimes, cavities are inside your tooth. Dentist's take X-ray's of your mouth, and based on these X-ray's they can pin point exactly where your problems are. There are 5 surfaces on a tooth, and one or more can be affected by a cavity. That is why it is very important to write down on a dental chart where the cavities are located on each tooth, and all dentists generally do it.
What is the cavity between bones at the joint?
A cavity is a decayed part of a tooth. A cavity can be caused by decay plaque, sugar and acid. Dentists fix cavities by drilling them.
In what ways are cosmetic dentists different from regular dentists?
Cosmetic dentists usually just repair the teeth by removing or fixing the tooth. While a regualar dentists they do teeth cleaning and help you with any cavaities that you may have.
What element is combined with sodium to make toothpaste prevent cavities?
You can get the answer to this one at your local dentists when they give you a fluoride treatment.
What is the cream dentists spread over your teeth to prevent cavities?
It's a flouride treatment, of limited effectiveness. Regular care and proper diet will do far more than any prophalaxis.
Why are dentists different from google employees and high fliers?
Dentists differ greatly because they are knowledgeable and wise enough to care for the long-term health of your teeth.
