Hard projections in the mouths of vertebrates used mainly to mechanically digest food. Teeth can also be used for the purposes of defense or obtaining meals, especially in the case of hunting.
0
votes
1answer
188 views
Does xylitol kill all kinds of bacteria?
Xylitol is known as a bad bacteria killer in human's mouth.
But I am curious about one thing.
Does xylitol kill all kinds of bacteria regardless of good or bad?
If so, Does xylitol kill bad bacteria ...
-2
votes
1answer
198 views
After doing brush I feel hungry? [closed]
Why I feel hungry after brushing my teeth in morning?
I usually have my dinner in between 9 to 10 at night and then I sleep at 12. Sometimes I wake up at 6 in morning and then I go to brush my teeth. ...
3
votes
0answers
44 views
Why do teeth ache after fillings?
I had a filling which involved drilling the tooth, but the drilling did not touch the nerve. According to the x-ray taken at the same time, the nerve is in fact some distance from where the filling ...
3
votes
1answer
183 views
Why we have just 2 teeth cycles, primary and secondary not more?
After baby teeth go, secondary teeth grow, is there a scientific reason why they are just 2 sets not more?
6
votes
1answer
1k views
Is there any scientific evidence that a human has ever grown a third set of teeth?
This is about the possibility (or lack thereof) for a person to re-grow a new "permanent tooth" or set of teeth, to replace the teeth that grew after their milk teeth fell out.
I had earlier seen ...
1
vote
1answer
312 views
Why do humans have irregular teeth and impacting wisdom teeth?
Imagine that horses, dogs, bears, and gorillas had teeth as unreliable as humans do, The interruption in behaviour and stress brought by teeth would cause them to be more prone to sinus infections, ...
12
votes
3answers
6k views
How is the fluoride in toothpaste absorbed?
How is the fluoride in toothpaste absorbed by our body? Does the tooth absorb the molecule directly, or is it absorbed by the mouth?
The answers to this question suggest that some materials can be ...
1
vote
1answer
99 views
Detecting Calcified stones and cracks in tooth
I had a dental problem when my first molar broke some months ago and after some decay and pain I am undergoing a dental treatment. The doctor was performing a root canal and kept on talking about ...
3
votes
0answers
138 views
What is the biochemical pathway of fluoride?
Fluoride is a common active ingredient in tooth paste to prevent dental caries. It is also added or removed from the water supply in some communities for the same reason, but in children only.
My ...
5
votes
1answer
71 views
What limits our ability to grow enamel rods?
From what I've understood from what I've read (which might be wrong), enamel rods extend away from the dentin in our teeth. As young people grow, the rods are thickened.
What are the technical ...
4
votes
1answer
88 views
How can fresh cavities form at the margins of sliver amalgam fillings on teeth?
Silver amalgam fillings predominantly contain silver a known bactericidal agent and mercury which a known toxin and has bactericidal property. So how is it that the plaque bacteria survive near the ...
1
vote
1answer
812 views
Why do rodents' teeth continue to grow?
Why do rodents' teeth continue to grow? Enamel formation and/or root formation continue throughout rodents' lives.
What's the mechanism that causes this?
4
votes
1answer
109 views
What is an explanation of the dual role of calcium hydroxide in teeth?
Calcium hydroxide induces dentine formation in permanent teeth, while it causes resorption of tooth in deciduous teeth. How is this dual role explained?
9
votes
2answers
10k views
Why does it hurt when you take sweets, if you have cavities in your teeth?
When you have cavities in your teeth taking any sweetend drinks or food causes sensitivity or pain. What could be the reason?
4
votes
2answers
39k views
What happens to the holes in the skull where teeth were developing?
In Skeptics.SE, a question regarding the skulls of children arose. Depicting a scary skull where the permenent teeth are "hidden" inside the jaws and the milk teeth are in the their place.
After all ...
8
votes
2answers
1k views
Do teeth have the capacity to heal?
Could a cavity in a human tooth "heal over" or possibly fill back in?
14
votes
4answers
6k views
What is the evolutionary reason behind the fragility of teeth?
Almost all organs in the human body have a rather large threshold within which the organ or tissue is capable of repairing itself using materials supplied by the body, whether it's made from organic ...
36
votes
3answers
1k views
Why don't teeth glow?
Hydroxyapatite is the main component of tooth enamel. It contains phosphorus in the form of phosphates, pyrophosphates etc. that are found to exhibit the the property of phosphorescence. But why don't ...
9
votes
2answers
293 views
Why do animal teeth get darker if exposed?
I was wondering why the teeth of cats (And dogs, as far as I know, plus possibly some other animals or even humans) get darker if they are exposed to air / light?
Example:
(See the lower end of the ...
