Misc Facts on Boards (Weiss Workbook) and Dental Anomolies

Question 1

Largest incisal embrasure of the anterior teeth

Answer 1

• The distal contact of the MAXILLARY LATERAL INCISOR is quite cervical: In the middle 1/3 (related to the distal curvature of this tooth)
• The mesial contact on the MAXILLARY CANINE is at the the junction of the incisal and middle thirds.
• The incisal embrasure between these two teeth is the largest of the anteriors.

Question 2

Proximal Crown Concavities of the Maxillary Posterior Teeth

Answer 2

Crown concavities on the proximal surfaces are found on the MESIAL SURFACES of the MAXILLARY FIRST PREMOLARS and on the DISTAL SURFACES of the MAXILLARY FIRST MOLARS (near the cervical line.

Question 3

Shape of the outline of anterior teeth from proximal view

Answer 3

Triangular

Question 4

Shape of interproximal space (or cervical embrasure) with apex = proximal contact

Answer 4

Triangular

Question 5

Shape of the central developmental groove on mandibular second molar (with 2 cusps)

Answer 5

“U” shape or “H” shape

Question 6

Shape of the grooves on occlusal of mandibular second premolars (with 3 cusps)

Answer 6

“Y” shape

Question 7

Shape of occlusal outline of maxillary molars (with 4 cusps)

Answer 7

Rhomboid

Question 8

Shape of PROXIMAL outline of crowns of mandibular posterior teeth

Answer 8

Rhomboid

Question 9

Shape of occlusal outline of maxillary molars (with 3 cusps, i.e., without DL cusp)

Answer 9

Heart shape

Question 10

Shape of outline of root (or pulp chamber) of maxillary first premolar at the cervical cross-section of the root

Answer 10

Kidney shape

Question 11

Shape of occlusal outline of mandibular first molar

Answer 11

Pentagon (five sides with 2 on facial and one on lingual, mesial, and distal)

Question 12

Shape of outline of FACIAL view fo canine and premolar crowns

Answer 12

Pentagon

Question 13

Largest cusp of a mandibular first molar (cf. longest cusps or teeth)

Answer 13

Mesiobuccal cusp

Question 14

Longest crown of MAXILLARY POSTERIOR teeth

Answer 14

First premolar

Question 15

Tooth with most variable anatomy

Answer 15

Maxillary lateral incisor

Question 16

Tooth most likely to be missing in adult dentition

Answer 16

Maxillary lateral incisor

Question 17

Of all incisors, which tooth is most likely to have the most pronounced marginal ridges

Answer 17

Maxillary lateral incisor

Question 18

Two types of teeth most likely to have 3 cusps

Answer 18

Mandibular second PM (F, ML, and DL) and Maxillary second molar (MF, DF, and L, DL is missing)

Question 19

Define PRIMARY CUSP TRIANGLE

Answer 19

Formed by three cusps on maxillary molars: MF, DF, and ML

Question 20

Incisors and canines and most premolars form from how many lobes?

Answer 20

4 Lobes (three from the facial cusp with the middle lobe forming mid-facial ridges; and the lingual lobe forming the cingulum or lingual cusp)

Question 21

Mandibular second three cusp premolars form how many lobes?

Answer 21

5 Lobes: 3 facial and 2 Lingual

Question 22

What is a distinguishing characteristic of the PRIMARY mandibular first molar

Answer 22

Prominent transverse ridge in the mesial half of the occlusal table

Question 23

Define CENTRAL FOSSA LINE

Answer 23

The line running between posterior tooth cusps (following central grooves)

Question 24

Occlusal tables are about ___-____% of the total buccolingual length of posterior teeth

Answer 24

55-65%

Question 25

When do permanent mandibular central incisor begin calcifying?

Answer 25

3-4 months

Question 26

When do permanent molars begin calcifying?

Answer 26

Birth

Question 27

At age 8, describe the contact of permanent molars to primary molars

Answer 27

The mesial contact of the permanent first molar contacts with the distal of the primary second molars

Question 28

What causes the spacing between primary teeth?

Answer 28

Growth of jaw bones

Question 29

How many teeth are present at age 8?

Answer 29

24; 18 deciduous plus 6 permanent (four permanent molars plus two mandibular incisors)

Question 30

What permeant teeth do the primary second molars resemble?

Answer 30

First permanent teeth (including cusp of Carabelli on maxillary molars)

Question 31

Compared to teeth with more rounded roots, how many canals do you expect in an oval shaped root?

Answer 31

2; Therefor maxillary incisors are least likely to have 2 canals compared to other mandibular anteriors, and mandibular canine is most likely to have 2 roots compared to maxillary anteriors

Question 32

Where are the placement of two roots on anterior teeth and premolars be located?

Answer 32

Facial and lingual

Question 33

What maxillary anterior tooth is LEAST LIKELY to have proximal contact in the incisal third?

Answer 33

Distal of the Maxillary Canine (Distal of lateral also)

Question 34

Where is the occlusion for the Maxillary first premolar lingual cusp

Answer 34

Maxillary first premolar lingual cusp occludes only with mandibular first premolar due to the mesial placement of the lingual cusp

Question 35

Describe the physical relationship between the long buccal nerve and the masseter muscle

Answer 35

The long buccal nerve crosses OVER the masseter muscle

Question 36

What nerves pass thru the Jugular Forament

Answer 36

CN XI, X, and IX (not XII)

Question 37

What nerves are located in the infratemporal fossa?

Answer 37

Mandibular/Inferior Alveolar Nerve, Lingual Nerve, Posterior Palatine Nerve (NOT pterygopalatine ganglion)

Question 38

What type of gland is the Parotid gland?

Answer 38

100% serous

Question 39

What nerve passage is associated with the parotid gland?

Answer 39

Petrosal

Question 40

What is another name for the mandibular fossa?

Answer 40

Glenoid fossa

Question 41

What is another name for the TMJ ligament and what is its function?

Answer 41

TMJ ligament = Collateral Ligament; helps to hold the articular disc in place over the head of the condyle

Question 42

What major veins drain into the pterygoid plexus?

Answer 42

Maxillary v., Deep facial v., Infraborbital v.

Question 43

What does the term “ANTRUM” refer to?

Answer 43

Antrum refers to a sinus within a bone and may refer to the maxillary sinus specifically

Question 44

What bones make up the Orbit of the Eye?

Answer 44

The Maxillary bone is the Floor; The Lacrimal and Ethmoid bones make up the Mesial side; The Zygomatic bone makes up the Lateral Wall; Frontal bone makes up the superior border (roof)

Question 45

Define “OPERCULUM” and describe its clinical scignificance

Answer 45

Operculum is the extension of gingival tissue overlying the crown of an erupting tooth: often a third molar. Irritation and subsequent of this operculum can result in periodontitis

Question 46

Compare anomolies to malformations

Answer 46

Anomolies are deviations from the norm which are genetic/embryonic in nature. Malformations are non-genetic deviations from the norm.

Question 47

Define adontia

Answer 47

Absence of teeth

Question 48

How common is total adontia?

Answer 48

Very uncommon; affects both Primary and Permanent teeth