Showing posts with label Mouth. Show all posts
Showing posts with label Mouth. Show all posts

Tuesday, October 30, 2018

Tooth - Initiation


We just learned about the Dentinogenesis.

When teeth are first being developed in the gums by a baby before it is born, that is called the Initiation Stage.

Babies are usually born without any teeth showing, but their mouths have already started getting ready for teeth to be made in their jaw.

The first sign of teeth getting ready is when the skin in the mouth starts to change.
Very soon a tooth will be made underneath the skin, and the gums need to be ready to heal up quickly when a tooth pokes through the skin for the first time.


(from: wikipedia - dental lamina)


Kid Facts - Blast from the past: Posterior Longitudinal Ligament

Tuesday, October 23, 2018

Dentinogenesis


We just learned about the Odontoblast.

Another part of a tooth growing is Dentinogenesis.

This what it is called when the Odontoblasts that we learned about create the dentin inside the teeth.


(from: wikipedia - human tooth development)


Kid Facts - Blast from the past: Intervertebral Discs

Tuesday, October 16, 2018

Odontoblast


We just learned about the Tooth Root.

Another part of the tooth is the Odontoblast.

These are the cells inside where the pulp is that help make the dentin part of the tooth.


(from: wikipedia - odontoblast)


Kid Facts - Blast from the past: Supraspinous Ligament

Tuesday, October 9, 2018

Tooth Root


We just learned about the Crown.

Another part of the tooth is the Root.

This is the part of the tooth below the gums, that has the cementum and pulp in it.


(from: wikipedia - root canal)


Kid Facts - Blast from the past: Xiphoid Process

Tuesday, October 2, 2018

Crown


We just learned about the Pulp.

Another part of the tooth is the Crown.

This is the top part of the tooth that sticks out over the gums.


(from: wikipedia - crown (tooth))


Kid Facts - Blast from the past: Costal Cartilage

Tuesday, September 25, 2018

Pulp


We just learned about the Cementum.

Another part of the tooth is the Pulp.

This is the inside of the tooth underneath the dentin, where the living cells are like the nerves and blood vessels.


(from: wikipedia - pulp (tooth))


Kid Facts - Blast from the past: Temporomandibular Ligament

Tuesday, September 18, 2018

Cementum


We just learned about the Dentin.

Another part of the tooth is Cementum.

This is a hard covering for the tooth just like the enamel that we learned about, but it is covering the part of the tooth going down below the gums, called the root.


(from: wikipedia - cementum)


Kid Facts - Blast from the past: Skull Suture Tissue

Tuesday, September 11, 2018

Dentin


We just learned about the Tooth Enamel.

Another part of the tooth is the Dentin.

This is the part of the tooth right under the enamel.
It is not quite as hard as the enamel, but it helps support the tooth underneath it.


(from: wikipedia - dentin)


Kid Facts - Blast from the past: Cartilage

Tuesday, September 4, 2018

Tooth Enamel


We just learned about Tooth Impaction.

Let's learn about what a tooth is made of!

The outside of the tooth that you can see is called Enamel.

Enamel is the hardest thing in the whole body, even harder than bone and nails.
It is made up mostly of something called hydroxyapatite, which is a kind of crystalline calcium.

Enamel is mostly white, but can be a little bit yellow or blueish if it is stained from food.


(from: wikipedia - tooth enamel)


Kid Facts - Blast from the past: Dense Connective Tissue

Tuesday, August 28, 2018

Tooth Impaction


We just learned about Dental Notation - Palmer.

We learned before that sometimes teeth don't show up in the right places.
When a tooth doesn't show up in the right place it is called an Impacted Tooth.

The tooth that gets impacted the most is the wisdom tooth.
Most of the time when a tooth is impacted it's because there wasn't enough room in the mouth for the tooth to come up, so it gets pushed off to the side or below, and can come out of the gums at the wrong place.


(from: wikipedia - tooth impaction)


Kid Facts - Blast from the past: Sharpey's Fibres

Tuesday, August 21, 2018

Dental Notation - Palmer


We just learned about Dental Notation - ISO.

Another type of Dental Notation is Palmer Notation.

This uses the same idea where the number starts at the front and goes backward, but it also uses a little L shaped or corner shaped symbol (┘└ ┐┌) to show which part of the mouth the tooth is in.

So if a dentist wants to talk about the 4th tooth in the upper right part of the mouth, they would use 4┘



(from: wikipedia - palmer notation)


Kid Facts - Blast from the past: Ligament

Tuesday, August 14, 2018

Dental Notation - ISO


We just learned about Dental Notation - Universal Numbering.

Another way of numbering teeth is the ISO System or the International Standards Organization System, also called the FDI system.

This way of numbering teeth puts teeth in four different sections by number:
1 - top right
2 - top left
3 - bottom left
4 - bottom right

The teeth in those areas are numbered starting from the front with 1, and the numbers go up as you get toward the back.
So the top right front tooth is 1-1, and the top left front tooth is 2-1.
The top right back tooth is 1-7, and the top left back tooth is 2-7.
The bottom teeth go from 3-1 to 3-7, and 4-1 to 4-7.

Some dentists like this way of numbering tooth because they can easily split the mouth up into 4 parts.




(from: wikipedia - dental notation)


Kid Facts - Blast from the past: Collagen

Tuesday, August 7, 2018

Dental Notation - Universal Numbering System


We just learned about Hypodontia.

When a dentist wants to look at your teeth, they give all your teeth a number so they can talk about which ones are healthy or have cavities.

This is called Dental Notation.

There are a few different ways that people number the teeth.
One way is called the Universal Numbering System

Sometimes a dentist will start with the upper right back adult or permanent tooth as #1 and then go 2,3,4,5,6,7,8 to the top middle, and 9,10,11,12,1314,15,16 to the top back left tooth.
Then next is the lower back left tooth at #17, and then toward the front 18,19,20,21,22,23,24.
From the front left around to the front right, 25,26,27,28,29,30,31,32.

Those are for the adult teeth.
If it's a primary or baby tooth, they use ABCDE from top right to top middle, and FGHIJ from top middle to top left.
KLMNO from bottom left to bottom middle, and PQRST from bottom middle to bottom right.


(from: wikipedia - universal numbering system)


Kid Facts - Blast from the past: Tendon

Tuesday, July 31, 2018

Hypodontia


We just learned about the Supernumerary Teeth.

Another thing that can happen in the mouth is Hypodontia, which means teeth that are missing, that never grew in the mouth.

This means when a person grows up and for some reason some of their teeth never came in.
They could be missing molars or incisors or canines.

If a lot of teeth are missing, it is called oligodontia.
If someone is missing all of their teeth, it is called anodontia.


(from: wikipedia - hypodontia)


Kid Facts - Blast from the past: Connective Tissue

Tuesday, July 24, 2018

Supernumerary Teeth


We just learned about the Wisdom Tooth.

Another set of teeth in the mouth are the Supernumerary Teeth or hyperdontia.

Usually grown up humans get up to 32 teeth.
Sometimes people don't get their last set of 4 molars, so they only have 28 teeth.
But sometimes people get even more teeth in places where they are not supposed to!

These are the supernumerary teeth, and they can show up as extra teeth anywhere in the mouth.
The most common place for them to show up is right by the maxillary central incisors, but sometimes they come up by the molars or somewhere else.


(from: wikipedia - hyperdontia)


Kid Facts - Blast from the past: Eponychium and Cuticle

Tuesday, July 17, 2018

Wisdom Tooth


We just learned about the Maxillary Second Molar.

The next tooth back in the mouth is the Wisdom Toothor Third Molar.

This tooth is a molar just like the first and second molars.
Many times there is not enough room in a person's mouth for these teeth, so a dentist or orthodontist will pull the teeth out.

If these teeth stay in the mouth, they can push up against the other teeth and hurt them.
Sometimes the gums in the mouth can get swollen or bruised by these teeth.




(from: wikipedia - wisdom tooth)


Kid Facts - Blast from the past: Lunula

Tuesday, July 10, 2018

Maxillary Second Molar


We just learned about the Maxillary First Molar.

Another tooth is the Maxillary Second Molar.

These ones are just like the Maxillary First Molars, just further back on the jaw.
They have 4 cusps, and they work to help grind up the food.

Some people get another row of teeth behind these, but for other people these are the last teeth in the mouth.


(from: wikipedia - maxillary second molar)


Kid Facts - Blast from the past: Nail Plate

Tuesday, July 3, 2018

Maxillary First Molar


We just learned about the Maxillary Second Premolar.

Another tooth in the human mouth is the Maxillary First Molar.

These teeth have cusps or pointy parts on them like the bicuspids, but they have four points instead of the two of a bicuspid.
There are two cusps on the cheek side, and two on the tongue side.
Sometimes people have a fifth cusp called the Cusp of Carabelli.

Molars are used for grinding up food that is in the mouth.

There are primary or baby teeth molars, but those are replaced by premolars.
The adult molars show up further back in the jaw after the mouth gets big enough to have space for them.


(from: wikipedia - maxillary first molar)


Kid Facts - Blast from the past: Nail Matrix

Tuesday, June 26, 2018

Maxillary Second Premolar


We just learned about the Maxillary - First Premolar.

The next teeth in the mouth are the Maxillary Second Premolars.

These also have two "cusps" on them like the First Premolars, so they are also bicuspids.
They are not as pointy as the First Premolars, so they are used more for grinding up food than tearing it up.

Just like the First Premolars, there are no baby or primary premolars.
The Second Premolars come up in the place where the baby molars were at when they fall out.


(from: wikipedia - maxillary second premolar)


Kid Facts - Blast from the past: Nails

Tuesday, June 19, 2018

Maxillary First Premolar


We just learned about the Maxillary Canine.

Another tooth in the mouth is the Maxillary First Premolar, also sometimes called the bicuspids.

Just like the canine teeth had one "cusp" on them, these teeth have two cusps, which is why they are sometimes called bicuspids.

These teeth are used to help grind up the food in your mouth, but they also have sharp pointed ends so they can be used to bite down into food and help tear it up.

For baby or primary teeth, there are no premolars, only incisors, canines and molars.
When the first baby molar tooth comes out, the first premolar comes up in it's place.



(from: wikipedia - maxillary first premolar)


Kid Facts - Blast from the past: Sweat Glands