7. Upper occlusion rim

Question 1

Features recorded with the upper occlusion rim: (7)

Answer 1

• Lip support.
• Upper incisors incisal edge location.
• Upper incisors buco-lingual angulation (torque). • Occlusal plane.
• Midline.
• Upper front teeth height.
• Upper front teeth width.

Question 2

Clinical procedure for upper occlusion rim records? (7)

Answer 2

1. insertion
2. Lip support assessment
3. Upper incisor incisal edge location
4. Occlusal plane orientation
5. midline
6. smile line
7. canine lines

Question 3

Upper occlusion rim records: What do we asses for lip support from the front? (3)

Answer 3

• Visible lip vermilion.

- Nasolabial furrow depth. - Disappearance of upper lip wrinkles.

Question 4

Upper occlusion rim records: What do we asses for lip support laterally? (2)

Answer 4

• Lip protrusion.

- Nasolabial furrow depth.

Question 5

Upper occlusion rim records: arranging inclination determines…?

Answer 5

upper incisors buco-lingual angulation (torque)

Question 6

Upper occlusion rim records: Where should the incisal edge of Upper Incisors be?

Answer 6

1-2mm below upper lip inferior border at rest

Question 7

Upper occlusion rim records: incisal edge location avries depending on? (2)

Answer 7

• age

- type of lip

Question 8

Upper occlusion rim records: Insical edge locarion measured, marked and adjusted by?

Answer 8

• ruler
• wax knife
• venetian spatula

Question 9

Upper occlusion rim records: Orientation of occlusal plane? (3)

Answer 9

Curved plane:

• Curve of Spee
• Curve of wilson

Question 10

Fully edentulous patients have what type of occlusal plane?

Answer 10

they have none

Question 11

Upper occlusion rim records: what is used as reference to build the orientation of occlusal plane?

Answer 11

Camper’s plane

Question 12

What is camper’s plane?

Answer 12

Ala to tragus

Question 13

Upper occlusion rim records: What do we use to orient the occlusal plane? (3)

Answer 13

• Foxplane & ruler
• Interpupilary line (front view)
• Ala-tragus line

Question 14

Upper occlusion rim records: What is sometimes better to ask for rather than using the interpupillary line?

Answer 14

ask the patient to smile and watch to symmetry

Question 15

Upper occlusion rim records: how do we assess the midline if the patient is asymmetrical? (3)

Answer 15

• Look at the philtrum.
• Get an average of the asymmetries of the patient.
• Don’t pay too much attention to the nose

Question 16

Upper occlusion rim records: smile line? (2)

Answer 16

• Lower edge of the upper lip while smiling.

* Represents the height of the upper front teeth.

Question 17

Upper occlusion rim records: Where do we mark the canines?

Answer 17

-distal surface of the canines marked

Question 18

Upper occlusion rim records: What are the 2 methods for marking canine lines?

Answer 18

• Vertical line from the lateral surface of the ala of the nose.
• Angle bisector of midline and nasolabial furrow

Question 19

Objective of upper occlusal rim facebow transfer? (2)

Answer 19

Transfer the relationship between upper teeth
and:
◦ Skull base.
◦ Rotation axis of the mandible

Question 20

How do we prepare the articulator when doing an upper facebow transfer? (3)

Answer 20

• Incisal pin at 0 mm.
• PCPI at 45
• Centric locking lever/screw closed.