Window Watchers (May 19, 1954)

oh I window Watchers you can see what's up here next to the bulletin board today some teeth and that's what we're going to talk about you know everybody has teased don't they but you know there's not very many people that know very much about 30 or do a very good job in keeping their teeth clean so that's we're going to talk about the day the different kinds of teeth that we have the different things that they're used for and how we can keep our teeth clean the right way to brush our teeth is why we should keep them clean right over here I have a picture of a tooth no there are two main parts to a tubular you can see at this top part right here is called the crown now this is the part of the tooth that we see when you open up your mouth and look into the mirror this is the white enamel part of the tooth and the bottom part part that we can't see it goes down through the gum and into its casing in the bone is called the route now we can look at a tooth that's a picture of a tooth and looks like the tues has been cut in half so that we can see the different parts of this to this white part right up here is the enamel that's the hard glistening substance that covers the crown that's the white part that we see we open our mouths and somebody talks we can see the enamel when they smile and this dark line that runs all around the root is called the cementum now this is a bone like substance that covers the rip of the tooth and then the gray part on the inside here is the denting this is the body of the tooth it make runs right up here into the crown and all the way down into the roof this is the main part of the tooth and then the dark part here in the center with a little specks in it is called the pulp of the two and through the pulp this is the center of the tooth and through the pulp the blood vessels run and the nerves run in their the blood comes right up here carrying food to the tooth and carrying away some of the race so that's what a tooth looks like if we would take it apart and take a good look at now that I have some a set of teeth right here that I want you to look at here's the Lord cart here's the top part now put them together so you see what looks like these are teeth and you've had teeth like these and I can't eat like these but these are the tea that I have now these are baby teeth they're called deciduous teeth no think about it if you ever heard of anything else that's been called deciduous something well think if you ever heard of deciduous trees those are trees that lose their leaves in the fall and get new ones in the spring the word deciduous means the losing of something after its reached its maturity and that's just what the trees do in the fall after the leaves have reached their maturity their final growing point they drop off don't they well these baby teeth after they've reached their maturity they fall out to member but five six seven years old we start losing sometimes two teeth in time but most of the time one tooth of the time starts falling out and that's what's supposed to happen now ordinarily a person has 32 teeth except in this baby set of teeth here and there are only 20 baby teeth that's all it comes in and look see the spaces between the baby teeth down here there's a lot of room in there isn't there that's because there are only 20 of them you know it's very important to brush baby teeth and keep take good care baby teeth too because they're paving the way for the permanent teeth later let's just say for instance that maybe this person didn't take good care of his teeth and decay set in and it was very harmful to the person's health so maybe this tooth right here we had that they had to pull a dentist had to pull well then there'd be a hole there wouldn't there just a hole right there well to either just like people if you have more room to move around then you move around and since this hole is going to be right here that is just what might happen to the teeth they might just decide to move around this one over here might move in and close up that hole and then where would the permanent tooth which is right down here in the gum where you can't see it where would it go when it got ready to come in well what do you have to come out front it would push up between me and the smaller hole that was left there and crawled all the teeth and make them crooked or maybe it would even come up back here in the back side that would be very good at all with it so it's very important to take care of our baby teeth too now let's look at some tea smarty now these are permanent teeth right here see uppity and the lower teeth and they fit together just like yours and mine and the loans are just the same as the uppers except in the difference in shape that you can see that by just looking in a mirror looking at the different chase but let's talk about the teeth and the different names that they have and the different uses for the teeth right here in front these two large T the largest ski that we have right on the upper teeth which bring on if you want to large t they're called the central incisors now to incise the word in size means cut and that's just exactly what these two teeth do they they help us to cut our food like if they were biting into an apple why we would need something sharp like these two teeth here to buy into the apple would be rather hard to bite into an apple with these back teeth with men so that's what these teeth are for another picture over here of an animal that makes very good use of his central incisors and this is of course and beside the horse in the back you can see a skeleton of the skull of the horse with his two front incisors that are white now a horse is very large from central incisors so that he can cut his food and straw and hay em and bite it off much much easier and a central incisor has one route now the truth that we first looked at had three brookland if you remember and that was a molar molars have three or four ripped on them but this incisor tooth has just one row now then there's the next two teeth on either side of the front teeth which are these two right here are called lateral incisors and they ate and cutting food too they're not quite as large to see as the two front middle incisors but they have the same purpose they help us to cut into this apple or ear of corn or whatever it is reading if you remember when you didn't have one of these teeth and your baby central incisor came out it's kind of hard to eat an apple and chew on an ear of corn wasn't it well these lateral incisors here there's an animal called a zebra well you know what a zebra is and here's a picture of a zebra and a picture of the Zebras skull showing the lateral incisors now deeper makes very good use of these spiral incisors and they're a little bit larger than the horse lateral incisors and I helps him to cut his food and break it off so that he can get it into his mouth and she with the back bar to see now he has more teeth too and so does the horse of course they're back here but he uses his incisors to bite off the food and then puts it in the back part of his mouth and chews it up rather than on the other side of the lateral incisor we have a tooth that's called a cuspid the cuspid we have of course one on each side but we'll just look at this one right here now the word cut see it's part of the word husband isn't it it means one point and that's what this tooth has one point if you feel in your own mouth you can feel up this truth right here which is the court forms the corners of your mouth comes to a point and now there's an animal if you think hard what animal has oversized really customers think you know what it would be on a cat has them let's look at this picture over here it's a picture of a tiger and this Tiger has particularly overgrown cuspid and the cuspids help tear food now that's why this it's there so important to this tire because this tiger eats meat and a lot of other animals and so that he can get it back in the back of his mouth and chew it up you have to tear it off so you can see these cuspids hanging down there just almost like fangs and that helps him to tear his food sometimes these cuspids are called I teeth and I don't really know why that is I think a long time ago people thought that the roots of the eyeties went way up and somehow hooked under the eye ball but that really is it through what we still refer to them sometimes its IT well then we come to the next two teeth after the cuspid here or the eye to the next two are called bicuspids now remember we said that cusp met one point well bicuspids means two points you know a bicycle means two wheels so a bicuspid has two points and there are two points can you see that there's one and there's the other one that's what they are those two points on them there in the bicuspid has either one or two routes and they help to tear some food but they work mostly in crushing the food up grinding it up and a dog has very good bicuspids another picture of a dog over here with the skull it's showing 2 and the by customs and the skull are painted white so that you can see right where they are the dog has his cuspids to to help tear off of food after he tears it off deadly custody bicuspids helped him to crush the food so that he can chew it all up and then swallow we have three teeth left and they are the first molar and the second molar and the third molar and an elephant uses these TV as great big mowers and he uses them to grind his food you know how strong an elephant is well you have to have strong teeth too especially for chewing up peanuts because they're pretty hard to chew on are they especially when the elephant eats the shell on everything else we have three of these are only two of them here the third one should go right here but I think maybe on this set of teeth maybe it's been pulled the third molar is sometimes called the wisdom tooth sometimes we don't even have wisdom teeth but right now while we're looking at the teeth let's talk about how we should brush them now i'm going to set this set of teeth away right set them over to the side and take the first set we had opening when we opened up on the bulletin board i'm going to show you how you should brush your teeth you should brush your teeth by the way three times a day after every meal or you probably won't want to take your toothbrush to school if you eat your lunch at school but then you should wash your mouth got real good after you eat with water but now let's watch and see how you really should brush the teeth and you see whether or not you brush your teeth this way I wonder whether or not to do when you make a toothbrush right here side of your team so the bristles are pointing the same way that the tooth is and then you turn it just slightly like that and then just wiggle the toothbrush just a little bit now you see this loosens all the food particles that get in between the teeth nuisance of all up now some mistake that people make is by going like this rie across the side of their teeth well that doesn't do any good the food particles are still in between the teeth like that but just by wiggling the brush just a little bit here that loosens up those food particles that are packed in there and then move on to another spot and finally tell you work all the way around the upper teeth then you can go back and with a movement like this brushing down you can brush away all those little food particles that you used up then you have to do the same thing to the inside the other side of the teeth and it's rather hard to wiggle the brush back there so if you just brush down and out like this cleaning all inside too well then of course food particles sometimes get stuff right down in here especially with these bicuspids in the molars because they're so flat on top so we just take toothbrush loosen up the food particles that are in there loosen them up up here and then brush all those food particles away just like that nobody want to duke of course the same thing to the lower teeth rubbing them back and forth like this all the way around and then brushing up like that now this massage is the gums too and that's another thing that's very important because because your gums are just as important as your teeth are sometimes if you don't keep rubbing your gums something might happen to them be just as bad as happening to your teeth so we want to keep the decay from getting into our mouths don't we and if you don't want to keep wet one reason to us and yes just have clean teeth and a good book you smile go look in the mirror and see on your teeth look good by now you