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DAM CH 1

Terms in this set (31)

The international numbering system labels a tooth number 55, what is that tooth using the universal numbering system?
A
What are the universal numbers of the permanent mandibular first molars.
19 and 30
According to UNS what numbers are used to identify maxillary canines?
6 and 11
The international numbering system labels a tooth 48, what is that tooth using the UNS.
32
enamel
White, protective external surface of the anatomic crown. The hardest substance in the body
Cementum
Dull yellow external layer of the anatomic root. Very thin and 65% mineralized
T or F? Cementum is just as hard as enamel?
False. Cementum is about as hard as bone but considerably less hard than enamel.
What is the CEJ?
CementoEnamel Junction (location where the enamel, which covers the anatomical crown of a tooth, and the cementum, which covers the anatomical root of a tooth, meet.) also known as the cervical line.
Dentin
Hard yellowish tissue under the enamel and cementum that makes up the bulk of the inner portion of each tooth crown and root. Extends outward from the pulp cavity to the inner boundary of the enamel or cementum
Dentin is less hard than —— but more hard then——
Enamel, cementum
What is the dentinoenamel junction?
inner surface of the enamel cap where enamel joins dentin.
What is the cementodentinal junction?
Inner surface of cementum where cementum joins dentin. Cementum is so thin,this is hard to identify on radiograph
Pulp
The soft non mineralized tissue that contains the blood vessels and nerves of a tooth
What's the difference between a pulp chamber and a pulp canal?
The pulp chamber is toward the crown and the pulp canal or root canal is located with in the root, both contain pulp
Where do nerves and blood vessels enter the pulp canal?
Through a hole near the root tip (apex) called an apical foramen.
Odontoblasts
Dentin forming cells that produce dentin throughout the life of the tooth. Normally maturing dentin is called secondary dentin.
Pulp responds to injury or decay by forming _____
Reparative dentin
Which tooth junctions are NOT normally visible on a handheld intact tooth?
Dentinoenamel junction, dentinocemental junction, dentinopulpal junction
Which mineralized tissue is the hardest?
a. Cementum
b. Pulp
c. Dentin
d. Enamel
e. Alveolar bone
D) Enamel.
What tissue forms the outer boundary of almost all of a pulp chamber?
Dentin
Which of the following are NOT functions of the pulp?
A. Taste sweet and sour
B. Sense pain
C. Provide nutrition to dentin
D. Produce new dentin
E. Produce new enamel
taste sweet and sour, products new enamel
What surfaces of a tooth would you be looking at in order to determine the mesiodistal dimensions of a molar?
Buccal, lingual, or occlusal surfaces
What surfaces of a tooth would you be looking at when measuring the buccolingual dimension of a molar?
mesial, distal, or occlusal surfaces
Which tooth surfaces face the lips or cheeks?
Facial, buccal, labial
Which pairs of teeth have a mesial surface touching a mesial surface
8, 9, 24, 25
Which teeth have a distal surface that does not normally contact another tooth?
1, 16, 17, 32
The term labial refers to association with or proximity to the lips, and the term ____ refers to association with or proximity to the cheeks
buccal
When viewing tooth 8 from the distal view, it can be divided into thirds from the incisal to the cervical and from the facial to the lingual. Which third is NOT possible to see from the distal view?
mesial
When viewing tooth 19 from this one view, it can be divided into thirds from the buccal to lingual and from the mesial to the distal. From which view is this possible?
occlusal
If you were observing the faciolingual dimension of a tooth, what surfaces could you be viewing?
mesial, occlusal, proximal, distal
If the root-to-crown ratio of a maxillary molar (tooth 14) is 1.72 and that of a maxillary Invisalign (tooth 8) is 1.16, which tooth has the longest root relative to its shorter crown?
Tooth 14
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