types and functions of teeth

Question 1

Anterior teeth/ posterior teeth

Answer 1

Anterior teeth: are incisors and canines
- visibe when smile

posterior teeth: are premoloars and molar. they appear to be straight line.

primary dentition teeth:
-molars
-incisors
-canines

permanent dentition teeth:
-molars
-incisors
-canines
-premolars

Question 2

Embrasures

Answer 2

when two teeth in the same arch
- facially,lingually,occkusaaly or apically.

Question 3

characteristics of tooth is

Answer 3

surfaces

-occlusal surfaces: posterior teeth
-Incisal surfaces: Anterior teeth
-lingual surfaces: surfaces of mandibular and maxillary closest o tongue.
-masticatory surfaces: chewing area.
- buccal or facial surfaces: closest to face.
-mesial surfaces: surfaces of teeth toward the midline.
- Distal surfaces: surfaces of teeth distant from midline.

Question 3

function of teeth

Answer 3

• incisors: single-rooted teeth with sharp,thin. front of mouth.cut food without heavy force.

-canine teeth: known as cuspids located at corner of arch. they have the longest roots of all teeth, last teeth to be lose

• premolars: known as bicuspids, cross between canine and molars. the premolars have a borad surface made for chewing food.
• molars: much larger then premolars and usually have four or more cusps to chew grind food.

Question 4

cusps, ridges, grooves

Answer 4

• cusps: any point or peak on occlusal surface of tooth
• ridges: any elevation on surface of tooth.
• developmental grooves: shallow groove or line on surface of tooth.

Question 5

Angles

Answer 5

line angle: angle formed of two surfaces of tooth crown along an imaginary line.

point angle: angle formed by junction of three surfaces at one point.

Question 6

Root

Answer 6

root divided crosswise into 3
- apical third: tip of root
- middle third:
- cervical third: neck of tooth

Question 7

crown

Answer 7

divided into 3
- occlusocervial division
- mesiodistal division
-buccolingual dividion

Question 8

occlusion

Answer 8

relationship of maxillary and mandubular when jaws are fully closed postion

types:
- centric occlusion: class I to III
- functional occlusion: chewing movment
-malocclusion: abonormal realationship of teeth

Question 9

tooth numbering

Answer 9

• universal/national numbering system
• federation dentaire internationale FDI
• palmer notation system

Question 10

tooth surface

Answer 10

-masial: tooth surface lcated closest to midline
-distal: tooth surface father from mifline
- lingual: tooth surface close to tongus
-Buccal: tooth surface close to the cheek
-facial: tooth surface near face
-Labial: tooth surface near lips
- occlusal: chewing surface if teeth
-incisal: sharp edge of anterior teeth

Question 11

six classes of carious lesions

Answer 11

class I
class II
class III
classIV
class V
classVI