 Hello everybody Andrea here. I want to go over the basics of the tooth numbers. So let me just first say this is the American system. When I'm talking though I'm going to talk about the Canadian system. Okay, so what you're seeing on the screen is the American system. So, first also I want to point out the teeth on the outside, those are the permanent teeth. The teeth on the inside are the primary teeth, so for children. Okay, so let me say the upper right is quad one, the upper left is quad two, the lower left is quad three, the lower right is quad four. And how you want to be looking at this is if your patient was the other way around like this. Okay, so, and I, I even have to think about it sometimes. So, although this is a mirror image so I'm not going to show you on me, I'm going to show you here. So this is exactly how it is so your patients upper right side, upper left side, lower left, lower right. Okay, perfect. So, the Canadian system this is how we do the teeth number so it's going to look different here. This would be the one eight, one seven, one six, one five, one four, one three, one two, one one. One is quad one. And then for quad two, we start, I'm going to start from the molars again so this would be the two eight, two seven, two six, two five, two four, two three, two two and two one. Another way to look at it is when you're looking at the back teeth, the eight is the wisdom tooth, the seven is a molar, the six is a molar. Oh my God, sorry guys, eight, seven, six, five is a premolar, four is another premolar, three is the canine, two is the lateral and one is the central. Sounds confusing, I know, feel free to write this down and take notes. Okay, I'm going to show you another tooth numbering system afterwards and then I'm going to do a recap. So are you getting the idea yet? Maybe pause the video, take some notes and then come back. Quad three now. Let's now start at the anterior, so that's the front teeth. So it would be the three one, three two, three three, three four, three five, three six, three seven and three eight. So the three is quad three. Remember those other numbers eight, seven, six, five, four, three, two, one. So the three one, three two, three three, three four, three five, you know, so on and so forth. And then quad four, four one, four two, four three, four four, four five, four six, four seven, four eight. So if you're just listening to this for the first time and let's say you just started dental hygiene or dental assisting school, you're going to feel so overwhelmed, but I promise to give it like a week, and you will know this like the back of your hand, trust me, it will be fine, I promise you. And then I want to talk to you guys about actually I might save this for the other image. So let me pause this I'm going to stop sharing my screen and then I'm going to open up another one so I'll be right back. Yes, so I'm back. This is another way to look at things and then you will also see what the teeth are called so not just the number, but what the teeth are called now I'm going to quickly just do a recap. This is the top arch, the top teeth, which are the maxillary teeth. This is the bottom arch, which are the mandibular teeth. The ones in the middle are the primary teeth so I'm not talking about the primary teeth yet I just want to talk about the permanent teeth the adult teeth. So remember quad one, quad two, quad three, and quad four, feel free to go back now to the beginning of the video to re listen to that and then come back to this one. I'll just repeat myself quad one, quad two, quad three, quad four, and then just a quick recap of the top ones okay. So this is the one one one two one three one four one five one six one seven one eight. Now to quad two, what I to one to two to two three to four to five to six to seven to eight. But now we're going to talk about what the teeth are called. This is the central incisor the lateral incisor the canine or the cuspid they mean the same thing. The first premolar second premolar or called the first by cuspid or the second by cuspid I know we should just keep the same names but we like to confuse you. The first molar second molar and third molar the third molar is the wisdom tooth. So remember how I said in the last part, you have the central lateral canine premolars and the molar so this is just more specific. Again, central incisor lateral incisor the canine, the first premolar second premolar first molar second molar and third molar and brackets it says approximately what age, these teeth come in the mouth. And that is good to know because let's say you're seeing a six year old, the mum or dad might go Oh, when does their first molar come in well typically age six to seven so if it's not in perfectly at age six. Don't be alarmed it might just be late age seven is okay to if it's not in by age eight, we start to go maybe we should take an x-ray to see if the tooth actually is there maybe it's just hiding underneath the gums and needs help. So I like in brackets, where it shows the when the teeth are supposed to come in so I hope this makes sense you guys okay, and just to quickly talk about the primary and the baby teeth notice how there's a lot less. They have a central lateral canine first molar and second molar they will eventually fall out of course, and then bring in the permanent teeth this can take time sometimes they have some of the baby teeth in the mouth, some of the permanent teeth that happens over time So how would you call these out, this would be, this would be quad five, I had to think about that five, six, seven and eight so for example this would be the five one five two five three five four five five. This is six one six two six three six four six five so it's different than the permanent teeth where it's quad one quad to quad three and four for primary teeth it's quad five, six, seven, eight. So you're going to probably watch this video a few times to get the handle of things, comment below if you guys have any questions, thank you so much for watching and I'll see you in the next one.