Chapter 1 – Nomenclature 1. Mixed dentition occurs between the ages of 5 and 12. a. True b. False ANSWER: True REFERENCES: Head, Neck and Dental Anatomy, 5e, pg.5 2. Permanent molars are succedaneous teeth. a. True b. False ANSWER: False RATIONALE: Permanent molars are not succedaneous teeth because they do not replace deciduous teeth. REFERENCES: Head, Neck and Dental Anatomy, 5e, pg.5 3. Posterior teeth are located in the front and include incisors and canines. a. True b. False ANSWER: False RATIONALE: Posterior teeth are located in the back and include premolars and molars. REFERENCES: Head, Neck and Dental Anatomy, 5e, pg. 7 4. The primary central incisor has an exfoliation date of 6 to 7 years. a. True b. False ANSWER: True REFERENCES: Head, Neck and Dental Anatomy, 5e, pg. 8 5. Attrition is the term used when referring to the wearing of teeth causing a gradual decrease in tooth height. a. True b. False ANSWER: True REFERENCES: Head, Neck and Dental Anatomy, 5e, pg. 9 6. The two dental arches formed by the jaw are called what? a. primary and secondary