Number 7: Lateral incisor (upper right) Number 8: Central incisor (upper right) Number 9: Central incisor (upper left)
7=Second molar. 8=Third molar or wisdom tooth. Your dentist may call out these numbers at the start of your visit as he or she inspects your teeth and enlists the dental assistant's help in charting your results. The second reason your dentist calls out numbers is to rank your teeth on the periodontal chart.
Your front four teeth (7, 8, 9, 10) and your front lower four teeth (23, 24, 25, 26) are incisors. Incisors are mainly used for gripping, cutting and shearing food. Incisors are the first thing people see when you flash your smile. Incisors also play a dominant role in speech.
The last tooth in the mouth, the 3rd molar, numbered 8 is what is otherwise known as the wisdom teeth.
Tooth Numbers
In Australia, dentists use a particular numbering system to identify the teeth that are present in the mouth. Each tooth is given a two digit number: the first one signifies which quadrant (corner) of the mouth the tooth is located in, and the second identifies the tooth type.
Tooth Surfaces (Their is a total of 5 surfaces per tooth)
Buccal, Facial, or Labial: (Front of tooth) -- This is the tooth surface that faces the outside of your mouth. Lingual or palatal: (Back of Tooth) -- This is the tooth surface that faces the inside of your mouth.
The primary second molars are teeth A,J,K,T.
The first thing to realize is dentists use a two-digit numbering system. So the upper right teeth begin with the number “1” (i.e. 11), the upper left teeth begin with the number “2” (i.e. 21), the lower left teeth begin with the number “3” (i.e. 31), and the lower right teeth begin with the number “4” (i.e. 41).
The location of wisdom tooth number 8 is in the innermost part of the tooth, also hidden deep inside the mouth. If it is caries in the upper jaw, the treatment is even more difficult than in the lower jaw.
Crowns made of porcelain or fused material survive for five to fifteen years. Metal crowns have a 20+ year lifespan. Crowns made of gold and zirconia are durable for life. Additionally, experts think that front-tooth crowns last longer than back-tooth crowns.
For that reason, it's often considered somewhat less important to replace a lost back molar, as these less visible teeth don't have a starring role in one's smile. However, back molars are still crucial for proper oral function and health, and missing molars should be replaced.
If you hear a 7, the gum pocket is 7mm deep. Decades of research shows that, with proper home care (brushing, flossing, water pick, etc) we can clean as deep as 3mm, but no deeper. At the base of the pockets deeper than 3mm, bacteria can live without being disrupted.
Why do dentists and assistants call out numbers to each other during oral exams? It's a measurement for oral health! Numbers like 18 or 24 are tooth numbers. Calling out 1, 2, or 3 is a measurement of the top of the gum to its attachment to the tooth.
This chart helps identify each tooth in the mouth with a corresponding number. It can help when it comes to brushing your teeth and identifying cavities. A tooth numbering system is a helpful tool for anyone who wants to learn more about their teeth.
Tooth Lettering For Baby Teeth
Top teeth for babies begin on your right-hand side with the letter A. There are 10 upper baby teeth in total. The last upper baby tooth is labeled with the letter J. Bottom teeth for babies begin on the right-hand side with the letter T and end with the letter K.
The canines have a single long root and a single root canal. The canine roots are the longest root of all teeth. Furthermore, the upper canines have longer roots when compared to the mandibular canines.
The sixth and seventh teeth (molars) usually have two roots on the bottom jaw and three roots on the top jaw.
As described previously, maxillary molars with 7 root canals is not commonly observed.
There is no limit to the number of teeth you can have extracted at once. While having multiple teeth extracted during the same procedure is rare, it is sometimes the only option for patients with severe tooth decay.
Teeth Numbers
These are numbered according to the internationally designed two-digit FDI (Federation Dentaire Internationale) numbering system that is used by dentists, not just in Australia. Every tooth has a two-digit number assigned to it.
The American Dental Association Universal Numbering System is a tooth notation system primarily used in the United States. Teeth are numbered from the viewpoint of the dental practitioner looking into the open mouth, clockwise starting from the distalmost right maxillary teeth.
Universal Numbering System
This is by far the most used dental numbering system by general dentists. The teeth will be numbered between 1 and 32, beginning with the farthest tooth to the back on the upper right side of the jaw.