DENTAL ANATOMY FINAL EXAM 2025-2026
FALL QUESTIONS AND ANSWERS GRADED A+
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
FALL QUESTIONS AND ANSWERS GRADED A+
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
