Dental Anatomy Final Exam review Exam with complete solutions (2022 study guide)

Dental Anatomy Final Exam review Exam with complete solutions (2022 study guide) Describe the difference between the Incisal Ridge and Incisal Edge Incisal edge: sharp line that delineates facial from lingual forms Incisal ridge: covers entire incisal surface. Has more surface area then incisal edge. When does calcification begin? By what time have all primary teeth begun calcification 13-16 weeks in utero calcification commences 18-20 weeks in utero: all primary teeth have initiated calcification What is the order of the first evidence of Calcification in the Primary dentition? Central incisor → 1st Molar → Lateral incisor → Canine → 2nd Molar Which Primary teeth are First to have a complete root? When? Mx Central incisor Md Central incisor Md Lateral incisor All at 1.5 years Which Primary teeth are last to have a complete root? When? Mx and Md canines 3.25 years of age By what age does anterior tooth spacing stop? 6 years of age Which Permanent tooth is the 1st to erupt into the oral cavity? What age? Permanent 1st molars (Md precedes Mx slightly) 6 years of age By age 6, which Permanent teeth have Crowns that are Completely calcified? Central and Lateral incisors 1st Premolars 1st Molars (Md and Mx for all of these) What is the Chronology of Calcification of the Permanent Mandibular teeth? 1st Molar → Incisors → Canines → Premolars → 2nd Molar → 3rd Molar What is the Chronology of Calcification of the Permanent Maxillary teeth? 1st Molar → Central incisor → Canine → Lateral incisor → Premolars → 2nd Molar → 3rd Molar What is the Order of Eruption for the Permanent Mandibular teeth? 1st Molar → Central incisor → Lateral incisor → Canine → 1st Premolar → 2nd Premolar → 2nd Molar → 3rd Molar By 8 years of age, what is the state of the 2nd and 3rd Permanent Molars? 2nd molar has not yet erupted 3rd molar has not yet begun calcification What are the 4 classifications of Cusp Form? Haplodont: single cone Triconodont: 3 cusps in straight line Tritubercular Molar: 3 cusps in primary triangle Quadritubercular Molar: 4 cusps in rectangular or rhomboid form From a Proximal aspect of the Mandibular teeth, which tooth has the greatest and which tooth has the least Proximal Reference angle? give the specific angle measurement Greatest angle: Lateral incisor at 23º Least angle: 2nd Premolar at 6º From a Facial aspect of the Mandibular teeth, which tooth has the greatest and which tooth has the least Facial Reference angle? give specific measurement Greatest angle: 2nd Molar at 14º Least angle: Lateral incisor at 0º What is the Facial reference angle of the Mandibular 2nd Premolar? 9º List the Location of the Proximal Contact areas of the Maxillary Anterior teeth Midline: Incisal third Distal of central: Junction of incisal and middle thirds Mesial of lateral: Junction of incisal and middle thirds Distal of lateral: Middle third Mesial of canine: Junction of incisal and middle thirds Distal of canine: Middle third (I,J,J,M,J,M) Which periodontal fibers are Resistant to forceful impaction of a tooth into the alveolus? Oblique fibers Name the Smallest embrasue in the Posterior Maxilla Between 1st and 2nd Molars Describe the difference between Primary and Permanent teeth regarding the following: Enamel Dentin Pulp horns Pulp chambers -Primary Enamel is Thinner and has Consistent depth -Primary Dentin is Thinner (limited between enamel and pulp chambers) -Primary Pulp Horns are Higher (higher underneath crown heights) -Primary pulp chambers are proportionately Large Describe the Incisal ridge of the Primary Maxillary Lateral incisor. Describe the Lingal fossa of this tooth. Curved toward the Facial surface Lingual fossa is Modestly (moderately) deep Where is most of the tooth structure on the Primary Maxillary Lateral incisor? Why? Most tooth structure is on the Facial surface Due to Lingual taper (less tooth structure on the lingual) Which Line angle is unique on the Primary Maxillary Lateral incisor? What is unique about it? DistoLingual line angle is slightly Concave What is the outline form of the Primary Maxillary 2nd Molar? How many cusps does it have?