Lecture 11- Maxillary Posterior Balance

Question 1

What is Balanced Articulation?

Answer 1

an arrangement of the teeth that presents a simultaneous contact of the maxillary and mandibular teeth on the right and left sides and in the anterior and posterior areas in centric and eccentric positions.

Question 2

What are the five determinants of occlusal balance?

Answer 2

1. Condylar guidance
2. Incisal Guidance
3. Plane of Occlusion
4. Compensating Curve
5. Cuspal Inclination

Question 3

What is Condylar Guidance?

Answer 3

the angulation from the horizontal in the sagittal plane that the paths of the condyle form in the TMJ

(components of an articulator that guide the movement of condyle analogs)

Question 4

Can Condylar Guidance be altered by the dentist?

Answer 4

AWWW HELLL NAAAWWWW

Question 5

How do you measure condylar guidance on a patient?

Answer 5

by taking eccentric records (lateral and protrusive) to set the articulator

Question 6

What is the average value of Condylar Guidance that’s sufficient for denture patients?

Answer 6

30 degrees

Question 7

What is Incisal Guidance?

Answer 7

the angulation from the horizontal line formed by a line drawn in the sagittal plane through the incisal edges of the opposing central incisors when they are in centric occlusion

Question 8

Increasing horizontal overlap with the same vertical overlap (increases/decreases) incisal guidance

Answer 8

DECREASES

Question 9

How is incisal guidance determined

Answer 9

by esthetic, phonetic and anatomic requirements

Question 10

Can Incisal Guidance be altered by the dentist?

Answer 10

YUP! JUST A LITTLE BIT THO! by increasing or decreasing the horizontal overlap

Question 11

Incisal guidance should be kept at _________ for denture patients.

Answer 11

A MINIMUM!

Question 12

What is the Plane of Occlusion?

Answer 12

the common plane formed by the incisal teeth and occlusal surfaces of the teeth.

Question 13

What is the ANTERIOR determining point of the plane of occlusion?

Answer 13

esthetic placement of the teeth

Question 14

What is the POSTERIOR determining point of the plane of occlusion?

Answer 14

mid-point of the retromolar pad

Question 15

Plane of occlusion is closely related to the __________ line.

Answer 15

Ala-Tragus Line (Camper’s Line).

Question 16

What is the Compensating Curve?

Answer 16

the anteroposterior and lateral curvatures in the alignment of the occluding surfaces and incisal edges of the artificial teeth in a balanced occlusion.

related to the Monson Sphere

Must be present to have occlusion

Question 17

Can the Compensating Curve be altered by the dentist?

Answer 17

YES MA’AM. it is OFTEN altered to restore proper relationship to the determinants when change in cuspal inclination is desired

Question 18

When must the compensating curve be STEEP?

Answer 18

where there is a STEEP condylar or incisal guidance

Question 19

What is Cuspal Inclination?

Answer 19

the angle made by the slopes of a cusp with the plane that passes through the tip of the cusps and which is perpendicular to a line bisecting the cusp, measured mesiodistally and buccolingually.
Ordinarily, should be closely related to condylar inclination.

Question 20

What is the Cuspal Inclination of: Anatomic cusps, Semi-anatomic cusps, and Non-anatomic cusps?

Answer 20

Anatomic- 33-20 degrees
Semi-anatomic- 20
Non-anatomic- 0

Question 21

4 KEY POINTS.. FLIP CARD!

Answer 21

1. all determinants DIRECTLY or INDIRECTLY related
2. Condylar guidance CANNOT be changed
3. Incisal guidance and plane of occlusion can be changed only SLIGHTLY
4. Clinician sets CUSPAL INCLINATION & COMPENSATING CURVE

Question 22

What is Thielman’s Formula?

Answer 22

Condylar guidance x Incisal guidance/

Compensative curve x Plane of Occ x Cuspal Inclination = 1

Question 23

What determines the position of mandibular anterior teeth in complete dentures?

Answer 23

1. Position of the Upper Anterior teeth
2. Lower Ridge Position
3. Occlusal vertical Dimension
4. Occlusal Scheme selected

Question 24

Guidelines for the placement of Mandibular Central Incisor:

Answer 24

1. Contacts occlusal place
2. Has labial inclination
3. Contacts midline
4. Has 1 mm VO and DO
5. Incisal edge follows curvature of ridge