Lecture 1 Flashcards
Diphyodont
- -Organisms with two sets of teeth (like human teeth)
- -a. Primary (baby teeth)-20 teeth. These are replaced by permanent teeth. 8 incisors, 4 cuspids, 8 baby molars,
- -b. Permanent-32 teeth, which are, on average, larger than the baby teeth: 8 incisors, 4 cuspids, 8 pre-molars (slightly smaller than baby molars), 12 perm molars (extra space is created for these b/c your jaw grows)
Upper Jaw
Maxillary
Heterodont
Different kinds of teeth (molars, pre-molars, incisors, etc)
Anterior
- -Cuspids forward
i. Incisors-Meant for cutting
ii. Canines (Cuspids)-Quite robust, these are the strongest tooth in the mouth relative to bone-holding strength
Posterior
- -Pre-molars back
i. Premolars (Bicuspids)-Starting to get flat crushing surface
ii. Molars-Broad root structure to support against lateral forces
What is the Universal naming code?
- Treat the mouth as a circle (primary teeth and extra teeth are given a letter)
- -Start in the upper-right-back (patients perspective) and move clockwise around the mouth until you reach the lower-right-back
What is the Palmer (Ortho) naming code?
- Quadrants with brackets
- Upper right (number w/bracket designating quadrants)
What is the International naming code?
Two digit system
- -The first digit tells you which region you are in (Quadrants 1-4)
- The second number tells you how far you are from the midline you are (numbers increase the further away you get
Mesial
Side facing the midline (closer to the front)
Distal
Side away from the midline (further from the front)
Facial
Side closest to the face (cheek)
i. Labial--for front teeth referring to the labial muscle ii. Buccal--side closest to the buccal muscle
Lingual (Palatal)
Side closest to the tongue
Biting Surfaces
i. Incisal-Biting surface for non-molar teeth (anterior teeth)
ii. Occlusal–biting surface for molars (posterior teeth)
Dentin
Makes up the majority of the roots and the whole inside core of the tooth (looks very much like bond)
Cementum
Coats the roots, anchor point between tooth and bone