Dental Anatomy High Yield Notes. **Atleast 35 questions comes from these areas of old lectures**

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1 Dental Anatomy High Yield Notes **Atleast 35 questions comes from these areas of old lectures** This review notes compiled and prepared by my sister for her own study, as a last day review session for Dental Anatomy. It is her good hard work you are paying for so cheaply. Please beware of reseller, if you got this material from another seller, demand a full refund. Thank you and Good luck. 4Ever.New.Me@n Ebay Seller A) Biggest, Tallest, Widest, Only, Best, and Most Likely Teeth (keywords): 1. The widest mesio-distally: Mandibular first molar 2. The widest ANTERIOR mesio-distally: Maxillary central 3. The only tooth w/ a pulp wider mesio-distally than faciolingually: Maxillary central 4. The widest facio-lingually: Maxillary first molar, Primary 2nd Max molar 5. The widest ANTERIOR facio-lingually: Maxillary canine 6. The only tooth that is narrower facially than lingually: Maxillary first molar 7. The tallest tooth inciso-gingivally: #1= Maxillary canine #2= Mandibular canine 8. The tallest crown inciso-gingivally: #1= Mandibular canine: all the released exam answer is this one. #2= Maxillary central #3= Maxillary canine 9. The longest root inciso-gingivally: Maxillary canine 10.The most symmetrical: Mandibular central

2 11. The smallest: Mandibular central 12. The narrowest mesio-distally: Mandibular central 13. The narrowest and smallest-rooted pre-molar: Mandibular first PM 14. The most congenitally malformed or missing: #1= third molars: all the released exam answer is this one. #2= Maxillary lateral 15. The pre-molar most likely to be congenitally missing: Mandibular second pre-molar 16. The best developed lingual anatomy: Maxillary lateral (And you should also know that it has a lingual pit, lingual groove) 17. The most likely to have dens-in-dente: Maxillary lateral 18. The greatest constriction from pulp chamber to canals: Maxillary first pre-molar 19. The pre-molar most likely to have 1 root and 1 canal: Mandibular second 20. The anterior tooth most likely to have a bifurcated root: Mandibular canine (And the 2 roots are one lingual and one buccal) 21. The only tooth with 2 triangular ridges on 1 cusp: Maxillary first molar 22. The only tooth with a mesio-lingual groove: Mandibular first pre-molar 23. The only tooth with a root that is inclined mesially: Mandibular canine 24. The only teeth with crown concavities on exam) #1= maxillary first pre-molar (mesial) #2= maxillary first molar (distal) 25. The only teeth with a longer mesial cusp slope than distal: #1= Maxillary first pre-molar: all the released exam answer is this one. #2= primary Maxillary canine

3 B) Contact Points: Inciso-gingival contact points: Mesial Distal maxillary central incisal - Junction of incisal & middle maxillary lateral - Junction of incisal & mid middle middle 1/3rd maxillary canine - Junction of incisal & mid middle middle 1/3rd mandibular central incisal incisal,mandibular lateral incisal incisal, and mandibular canine - At incisal mid 1/3 1. All posterior teeth inciso-gingival contact points are in the middle third of the crown. The exception is the mesial surface of the maxillary & mandibular molars. (Their contact points are at the junction of the occlusal & middle thirds.) 2. All teeth have facio-lingual contact points in the middle third of the crown, but posterior teeth have the contact points leaning toward the facial. C) Heights of Contour and the CEJ: 1. Facial heights of contour are most prominent on mandibular posterior teeth. They are least prominent on mandibular anterior teeth. 2. All teeth have facial heights of contour in the cervical third, except for mandibular molars (which have facial heights of contour at the junction of the cervical and middle thirds). 3. Anterior teeth have lingual heights contour in the cervical third of the crown. 4. Posterior teeth have lingual heights contour in the middle third of the crown EXCEPT for the mandibular second pre-molar (which has a lingual height of contour in the occlusal third). ** The CEJ dips deeper on: -anterior teeth than posterior teeth -the mesial side of a tooth than the distal -Maxillary teeth than mandibular teeth

4 D) Embrasures: Facial embrasures are narrower than lingual embrasures on all teeth except the maxillary first molar (where the facial embrasure is wider) and between the mandibular centrals (where the facial and lingual embrasures may be the same size). The largest incisal embrasure is between the maxillary lateral and canine. The 2nd largest incisal embrasure is between the mandibular lateral & canine. The 3rd largest incisal embrasure is between the maxillary central and lateral. The 4th largest incisal embrasure is between the maxillary centrals. The 5th largest incisal embrasure is between the mandibular central & lateral. The 6th largest (smallest) incisal embrasure is between the mandibular centrals. The largest OVERALL occlusal embrasure is between the maxillary canine and first pre-molar. but we shouldn't be comparing anteriors (apples) and posteriors (oranges). E) Calcification and Eruption: Crowns take a few years to form once calcification has begun, so it is important to take systemic fluoride through age 12 to protect all teeth. For those who could not care less about the third molars, fluoride need not be taken once the second molars are completely calcified at age 6-7. Calcification dates: Primary teeth show evidence of calcification in utero (in the 2nd trimester). 6-year molars show the first evidence of calcification at birth. Permanent anteriors show the first evidence of calcification before age 1. Permanent pre-molars show the first evidence of calcification around age year molars show the first evidence of calcification around age 3. Wisdom teeth show the first evidence of calcification around age 7-9. Mandibular teeth usually erupt before maxillary teeth. A tooth erupts when its root is about half-formed. The roots of primary teeth will complete about 1.5 years after eruption; the roots of permanent teeth will complete about 2.5 years after eruption.

5 F) Incisal Edge Orientation: These based on an interproximal view: Maxillary incisors have incisal edges that are centered over the long axis of the tooth. Mandibular incisors have incisal edges that are lingual to the long axis of the tooth. Maxillary canines have incisal edges that are facial to the long axis of the tooth. Mandibular canines have incisal edges that are lingual to/centered over the long axis. Mandibular second pre-molars have a facial cusp centered over the long axis and a lingual cusp in line with the lingual surface of the root. G) Shapes of teeth: From a facial or lingual view: All teeth have a crown shaped like a trapezoid (with the short side gingival). From a proximal view: Anterior teeth have a crown shaped like a triangle. From a proximal view: Maxillary posterior teeth have a crown shaped like a trapezoid (with the long side gingival). From a proximal view: Mandibular posterior teeth have a crown shaped like a rhombus H) Trends of crowns: > Teeth with one facial cusp have a mesial cusp slope that is shorter than the distal cusp slope, except for the primary maxillary canine and the permanent maxillary first pre-molar. > The crowns of teeth tend to get shorter from the canine to the third molar. (Possible clinical correlation- crowns on molars are more difficult because they are so short.) > All teeth develop from 4 lobes except permanent first molars and the mandibular 2nd pre-molar 3-cusp type (which develop from 5 lobes). > The mesial side of a tooth is typically bigger than the distal side. > The largest cusp of molars is typically the mesial supporting cusp. > Enamel is the hardest substance in the human body. It is about 96-97% calcified. Dentin contains about 20-25% organic material.

6 I)Trends of Roots, Canals and Pulp: > The roots of all teeth are inclined distally, except for the mandibular canine (which leans to the mesial). > If one root has 2 canals, they will be oriented facially and lingually. > Teeth erupt with as many pulp horns as they have cusps. The pulp follows the outline of the tooth, so it will be widest at the widest portion of the tooth. GOOD LUCK