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49 Cards in this Set

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1. Cusp (with cusp tip)
point part or peak

Molars and Pre-molars: occlusal surface

Canines: incisal edge
2. Cusp Rdiges
Linear prominence

Each cusp tip has four
-mesial cusp ridge, distal cusp ridge, facial (buccal or labial) cusp ridge, and triangular cusp ridge
3. Another name for mesial and distal cusp ridges?
Cusp slopes or cusp arms

Slopes that converge as the cusp tip to form an angle when viewed from facial aspect
4. Marginal Ridges
Incisor and Canine Teeth:
-mesial and distal border of the lingual surface
-converge toward cingulum
-cingulum is bump on lingual surface of all anterior teeth on the cervical third

Posterior Teeth:
-mesial and distal borders of occlusal surface
5. Triangular Ridges
On each major cusp of posterior teeth

From cusp tip to depression (sulcus) on occlusal surface faciolingually

**mesiolingual cusp on maxillary molars has two all other teeth have one
6. Transverse Ridges
Triangular ridge from facial cusp tip joins triangular cusp ridge from lingual cusp tip

Crosses occlusal surface of tooth in a buccolingual direction
7. Oblique Ridges
Triangular ridges of buccal cusp tip joins triangular ridge of lingual cusp tip

Triangular ridge of mesiolingual cusp joins triangular ridge of distobuccal cusp

**Only on maxillary molar

**Crosses occlusal surface diagonally
8. Buccal (cusp) ridge
Subtle ridge running cervico-occlusally
on posterior teeth

*Called labial ridge on canines
(most prominent on maxillary canines)
9. Cervical Ridge
Facial surface of permanent molars and all primary teeth

Runs mesiodistally in cervical one-third of buccal surface crown
10. Perikymata
Minute horizontal ridges on enamel of newly erupted permanent teeth

Form from overlapping layer of enamel laid down during tooth formation

Lines are closer on cervical third of crown
11. Mamelons
Small scallops on incisal edge of newly erupted tooth

Formed from one of the three facial developmental lobes

Usually not on adult dentition b/c ware off after tooth comes in functional contact with opposing tooth
12. Sulcus
Broad depression on occlusal surface of posterior teeth

Inclines of sulcus are formed by triangular ridges that can converge at the bottom of the sulcus in developmental groove
13. Developmental Groove
Sharp, narrow linear depression formed during tooth development

Usually separate lobes or major portions of the tooth
14. Central Groove
In the buccolingual center of sulcus

Runs mesiodistally

May have fossa developmental grooves (triangulare fossa grooves) can be at both mesial and distal ends
15. Supplemental Grooves
Additional grooves that aren't developmental

Small, irregular, and don't occur at junction of lobes or major portions of tooth
16. Fissure
Crevice at bottom of any groove

Caused by incomplete fussion of enamel during tooth development

Decay often begins at deepest part of fissure
17. Fossa
Small depression

Anterior Teeth: between mesial and distal marginal ridges on lingual surface

Posterior Teeth: between mesial and distal marginal ridges on occlusal surface
18. Pits
Depth of fossa where two or more grooves join

Enamel defects where decay may begin
19. What is the anatomical structure of the root?
1. Apex of root
-tip at end
2. Apical foramina
-visible openings where nerves and blood vessels enter tooth pule
3. Cervix
-neck (root and crown unite)
20. What are the structures of a multirooted molar?
1. Root Trunk
-next to cementoenamel junction and has not yet split
2. Furcation
-where root trunk divides
-bifurcation or trifurcation
3. Furcal Region
-space between two or more roots
21. Sulcular Groove
Between buccal and lingual cusps
22. Anteroposterior Curve
Curve of Spee

Cusp tips of posterior teeth follow curve anteroposteriorly

Maxillary arch is convex and mandibular arch is concave
23. Mediolateral Curve
Curve of Wilson

Side to side curve

Maxillary arch is convex where mandibular is concave
24. What is the height of contour?
Crest of Curvature

Greatest convexity or bulge
25. Where is the height of contour on anterior teeth?
Facial and lingual heights of contour in cervical third

Cingulum on lingual surface

Reason to have is to divert food away from gingiva
26. Where is the height of contour on posterior teeth?
Facial surface: cervical third of crown

Lingual surface: middle third of crown
27. Contact Area
Small spot on mesial and distal surface of tooth which touches adjacent tooth

Greatest heights of contour on proximal surface
28. Interdental Area
Cervical Embrasure

Interdental papilla occupies much of interdental area
(free gingival tissue)
29. How does length of contact area affect the patient?
If contact area is too long, gum would be sore b/c pushing onto gum

If contact is not tight enough food gets caught
30. What is the purpose of embrasures?
Open spaces that sweep away from contact area

Allow chewed foods to escape from occlusal surface

Also expose tooth surfaces to oral fluids (i.e. saliva)
31. How is the location of proximal contacts determined?
By height of contour

Contact location is determined by referring to thirds
32. What is the location of proximal contacts in the inciso/occlusocerival dimenstion?
1. More anterior the tooth, the more incisial/occlusal are the locations of the proximal contacts

2. On any tooth the mesial contact is more incisial/occlusial than the distal contact
***EXCEPT lower first premolar
33. Location of maxillary anterior proximal contacts
IJ JM JM

Central Incisor: incisal third and junction of incisal and middle third

Lateral Incisor: junction of incisial and middle third and middle third

Canine: same as lateral incisor
34. Location of mandibular anterior contacts
All have contact areas in incisal third

EXCEPT....

Distal contact of canine at junction of incisal and middle third
35. Location of maxillary premolar contact areas
Middle third

Distal contact is more cervical than mesial contact
36. Location of mandibular premolar contact areas
First Premolar
-mesially at the junction of the occlusal and middle third
-distally in the occlusal third

Second Premolar
-mesially occlusal/middle thrid
-distally middle third
37. Location of all molars contact areas
Mesially at occlusal/middle third junction

Distally at middle third
38. Inciso/occlusal locations of proximal contacts of a maxillary quadrant
IJ, JM, JM, MM, MM, JM, JM, JM

All junctions are either at incisial and middle third or occlusal and middle third
39. Inciso/occlusal location of proximal contacts of a maxillary quadrant
II, II, IJ, JO, JM, JM, JM, JM

All junctions are either incisial and middle third or occlusal and middle third
40. Relative depths of facial and lingual embrasures
Determined by location of contact faciolingually

Anterior Region: both embrasures have approximate equal depth
-proximal contacts bwt anterior teeth are centered

Posterior Region: lingual embrasures are deeper
-contacts toward facial surface
41. Maximal Intercuspal Position
Best fitting together of teeth
42. Horizontal overlap of anterior teeth

Vertical overlap of anterior teeth
Maxillary incisial edges overlap mandibular teeth

Maxillary incisial edges extend below incisial edges of mandibular teeth
43. Relationship of posterior teeth
Buccal cusps and surface of max are buccal to mandibular

Lingual cusps of max rest in occlusal fossae of mandibular

Buccal cusps of mandibular rest in occlusal fossae of max

Lingual cusps and surfaces of mandibular are lingual to max
44. Relative Alignment
Mesiobuccal cups of maxillary first molar is aligned directly over mesiobuccal groove on mandibular first molar

Maxillary canine fits into facial embrasure between the mandibular canine and first premolar
45. Which teeth in the dental arch cannot occlude with two teeth in the opposing arch?
Mandibular central incisors

Maxillary last molar
46. How many lobes do incisors develop from?
Four lobes

Three facial lobes (three incisally located mamelons)

One lingual (cingulum area)
47. How many lobes do canines and most premolars develop from?
Four lobes

Three facial

One lingual (cingulum on canine and one lingual cusp on premolar)
48. How many lobes does the mandibular second premolar develop from?
Five lobes

Three facial

Two lingual (two lingual cusps)
49. How many lobes do molars develop from?
Generally, each molar cusp forms from one lobe