W2 Consultation - Directions, cavity classification, cavity walls

Question 1

I. Directions and surfaces of teeth
1. What are the 5 main surfaces and directions of the teeth?

Answer 1

1. Facial/ Vestibular
2. Oral
3. Incisal
4. Occlusal
5. Proximal

Question 2

I. Directions and surfaces of teeth
2. Describe the facial/ vestibular surfaces

Answer 2

1. Facial/ Vestibular - The surface that faces the cheeks or lips (vestibulum oris)
2. Two subtypes
   - Labial: the surface towards the lips - Anterior teeth
   - Buccal - the surface towards the cheeks - Posterior teeth

Question 3

I. Directions and surfaces of teeth
3. Describe the oral surface

Answer 3

1. Oral surface: the surface that faces the oral cavity (cavum oris proprium).
2. Can also use the terms:
   – Palatal – The surface that faces the palate. – Upper teeth
   – Lingual – The surface that faces the tongue. – Lower teeth

Question 4

I. Directions and surfaces of teeth
4. Describe the Incisal surface

Answer 4

The biting edge of an anterior tooth.

Question 5

I. Directions and surfaces of teeth
5. Describe the occlusal surface

Answer 5

The chewing surface of posterior teeth.

Question 6

I. Directions and surfaces of teeth
6. Describe the proximal surface

Answer 6

Proximal – Tooth surfaces that are next to each other (i.e., distal of lateral incisor and mesial of canine).
– Mesial – The surface that is closest to the midline of the face.
– Distal – The surface that is away from the midline of the face.

Question 7

I. Directions and surfaces of teeth
7. What are the Surfaces of anterior teeth?

Answer 7

4+1edge:
* Labial/facial/vestibular
* Mesial/mesioaproximal
* Oral/palatal or lingual
* Distal/distoaproximal

• Incisal edge

Question 8

I. Directions and surfaces of teeth
8. What are the Surfaces of posterior teeth?

Answer 8

5 edges:
* Buccal/facial/vestibular
* Mesial/mesioaproximal
* Oral/palatal or oral/lingual
* Distal/distoaproximal
* Occlusal

Question 9

I. Directions and surfaces of teeth
9A. Identify these parts of an anterior teeth

Answer 9

1. Apical
2. Middle
3. Cervical

Question 10

I. Directions and surfaces of teeth
9B. Identify these parts of an anterior teeth

Answer 10

1. Cervical
2. Middle
3. Incisal

Question 11

I. Directions and surfaces of teeth
9C. Identify these parts of an anterior teeth

Answer 11

1. Distal
2. Middle
3. Mesial

Question 12

I. Directions and surfaces of teeth
9D. Identify these parts of an anterior tooth

Answer 12

1. Lingual
2. Middle
3. Labial

Question 13

I. Directions and surfaces of teeth
10A. Identify these parts of a posterior tooth

Answer 13

1. Distal
2. Middle
3. Mesial

Question 14

I. Directions and surfaces of teeth
10B. Identify these parts of a posterior tooth

Answer 14

1. Occlusal
2. Middle
3. Cervical

Question 15

I. Directions and surfaces of teeth
10C. Identify these parts of a posterior tooth

Answer 15

1. Buccal
2. Middle
3. Lingual

Question 16

II. Caries/ cavity classification
1. How many dental caries/ cavity classes are there?

Answer 16

6 classes

Question 17

II. Caries/ cavity classification
2. Describe class I of caries/ cavity classification

Answer 17

Class 1 (I) lesions occur in pit and fissures on the facial, lingual and occlusal surfaces of molar and premolars,and, lesss often, the palatalsurface of maxillary anterior teeth (most frequently lateral incisor, less frequently central incisor, rarely canines.)

Question 18

II. Caries/ cavity classification
3. Describe class II of caries/ cavity classification

Answer 18

1. Class 2 (II) lesion occurs on the proximal surfaces of the posterior teeth (molars and premolars). Smooth surface caries.
2. Types:
   - Mesial side is involved – MO cavity
   - Distal side is involved – OD cavity
   - Both proximal sides are involved – MOD cavity

Question 19

II. Caries/ cavity classification
4. Describe class 3 of caries/ cavity classification

Answer 19

• Class 3 (III) lesion occur on the proximal surface of anterior teeth (central and lateral incisors and canine.
• Class 3 cavities do NOT involve an incisal edge!

Question 20

II. Caries/ cavity classification
5. Describe class 4 of caries/ cavity classification

Answer 20

• Class 4 (IV) lesion occur on the proximal surface of anterior teeth when the incisal angle requires restorartion.
• The angle may have to be removed because of its fragility or for proper placement of the restoration, or it may have been fractured by trauma.

Question 21

II. Caries/ cavity classification
6. Describe class 5 of caries/ cavity classification

Answer 21

• Class 5 (V) lesion occur on smooth facial/vestibular and lingual/oral surfaces in the gingival third of teeth.
• Class 5 cavities begin close to the gingiva and may involve a cementum or dentinal surface as well as the enamel.

Question 22

II. Caries/ cavity classification
7. Describe class 6 of caries/ cavity classification

Answer 22

Class 6 (VI) lesion are pit or wear defects on the incisal edges of anterior teeth or the cusp tips of posterior teeth.

Question 23

III. Walls of cavities
1. Definition of the wall of cavity

Answer 23

A preparation takes the name of the involved tooth suface(s)

Question 24

III. Walls of cavities
2. Which types of walls do we have?

Answer 24

Internal and external walls

Question 25

III. Walls of cavities
3. List internal walls

Answer 25

– Axial wall – parallel to the long axis of the tooth
– Pulpal wall – perpendicular of the long axis of the tooth

Question 26

III. Walls of cavities
4. List external walls

Answer 26

– Mesial / Distal / Proximal wall
– Facial / vestibular / buccal / labial wall
– Lingual / palatal / oral wall
– Gingival
– Incisal / Occlusal wall – (Class 3 and Class 5 cavities)

Question 27

III. Walls of cavities
5. Which walls are included in class 1 cavity?

Answer 27

Question 28

III. Walls of cavities
6. Which walls are included in class 2 cavity?

Answer 28

Question 29

III. Walls of cavities
7. Which walls are included in class 3 cavity?

Answer 29

Question 30

III. Walls of cavities
8. Which walls are included in class 4 cavity?

Answer 30

Question 31

III. Walls of cavities
9. Which walls are included in class 5 cavity?

Answer 31

Question 32

IV. Steps of cavity preparation
1. What are the 2 stages of cavity preparation?

Answer 32

1. Initial tooth preparation stage
2. Final tooth preparation stage

Question 33

IV. Steps of cavity preparation
2. What are the 4 steps of Initial tooth preparation stage?

Answer 33

– Step 1: Initial depth and outline form
– Step 2: Primary resistance form
– Step 3: Primary retention form
– Step 4: Convenience form

Question 34

IV. Steps of cavity preparation
3. What are the next 5 steps of Final tooth preparation stage?

Answer 34

– Step 5: Removal of defective restorative material and/or soft dentin
– Step 6: Pulp protection
– Step 7: Secondary resistance and retention form
– Step 8: External wall finishing
– Step 9: Final procedures: depridement and inspection