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Dentition Development
DA Section 2
23
Anatomy
Graduate
09/08/2014

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Cards

Term
3 functions of human teeth
Definition

1. mastication (chewing)

2. esthetics (appearance)

3. phonetics (speech)

Term
periodontium
Definition
supporting structures (hard and soft tissues) of the teeth - includes alveolar bone and gums
Term
iatrogenic
Definition

dentist induced imperfections in the periodontium, also harm to the tissues caused by the dentist

DON'T DO THIS TO YOUR PATIENTS!

Term
conical
Definition

-crown composed of a single lobe - most primitive shape

-function is to grasp and combat, not chew

-seen in lower vertebrates

Term
tritubercular
Definition

-three lobed tooth

-the evolutionary step in different types of teeth

Term
Is primate dentition simple or complex?
Definition
-Complex - teeth are usually have 4+ lobes
Term
ungulates
Definition

-hoofed mammals (horse, deer, cows)

-have extensive lateral jaw movement

Term
Lobe
Definition

-primary division of teeth

-separated by distinguishable primary grooves

-pattern helps in function of teeth

-DON'T form seperately and then calcify

Term
What are the lobes of the permanent anterior teeth?
Definition

-4 lobes total

1. mesiolabial

2. middle labial

3. distal labial

4. ligual

-mamelons show where labial lobes are and labial depressions separate lobes

Term
Explain the lobes and grooves of most premolars
Definition

-most have 4 lobes (EXCEPT MANDIBULAR 2nd PREMOLAR)

1.  mesiobuccal

2. middle buccal

3. distobuccal

4.  lingual

-separated by central groove and mesiobuccal and distobuccal developmental depressions

Term
Explain the lobes and grooves of the mandibular 2nd premolar
Definition

-5 lobes (3 buccal, 2 lingual)

1. mesiobuccal

3. middle buccal

3. distal buccal

4. mesiolingual

5. distolingual

-2 grooves

1. central groove

2. lingual groove

-also has mesiobuccal and distobuccal developmental depressions

Term
Explain the lobes and grooves of the maxillary molars
Definition

-4 lobes (2 buccal and 2 lingual)

1. mesiobuccal

2. distobuccal

3. mesiolingual

4. distolingual

-3 grooves

1. buccal groove

2. central groove (distal and mesial portion)

3. distolingual groove

Term
Explain the lobes and grooves of the mandibular first molars
Definition

-5 lobes (2 mesial, 3 distal)

1. mesiobuccal                 2. distobuccal

3. mesiolingual                 4. distolingual

5. distal

-4 grooves

1. buccal groove

2. lingual groove

3. central groove (distal and mesial portion)

4. distobuccal groove)

Term
Explain the lobes and grooves of mandibular molars
Definition

-4 lobes (2 mesial, 2 distal)

1. mesiobuccal               2. distobuccal

3. mesiolingual               4. distolingual

-3 grooves

1. buccal groove

2. lingual groove

3. central groove (mesial and distal portions)

Term
Curve of Spee
Definition

-curve from canines through buccal cusps on premolars/molars

-moves upward as it goes posterior

-teeth in normal occlusion are tipped to follow curve

*maxillary molar roots tipped mesially

*mandibular molar roots tipped distally

Term
Curve of Wilson
Definition

-medio-lateral curve of the occlusal surface of post. teeth

-right angle to Curve of Spee

-teeth in normal occlusion will tip to fit curve

*mandib. post. crown tipped lingually

*maxil. post. crowns tipped buccally

Term
Sphere of Monson (aka Copmensating Occlusal Curvature)
Definition

-combination of Curve of Spee and Curve of Wilson to create 3D curvature of occlusal surface

-concave for mandibular arch

-convex for maxillary arch

Term
axial position of maxillary anterior teeth
Definition

-root --> lingual

-incisor roots --> mesial

-canine roots --> distal

 

Term
axial position of maxillary premolars
Definition
-roots slightly --> lingual and distal
Term
axillary position of maxillary molars
Definition

-roots --> lingual (GREAT)

-roots --> mesial (moderate)

Term
axial position of mandibular anterior teeth
Definition

-incisors roots --> mesial (extremely slight)

-canine roots --> distal (very slight)

Term
axial position of mandibular premolars
Definition

-roots --> distal

-1st premolar roots --> lingual (slight)

-2nd premolar roots --> buccal (slight)

Term
axial position of mandibular molars
Definition
-roots --> buccal and distal (moderate-GREAT)
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