Dental: Centric Stops And Supporting Cusps

Front 1

What are balancing cusps and what do they do?

Back 1

These are the nonfunctioning cusps (BULL)
They protect the soft tissues

Front 2

What do Maxillary Teeth oppose?

Back 2

RULE #2:

ALL MAXILLARY TEETH OPPOSE THEIR OPPOSITE AND ONE TOOTH POSTERIOR

Front 3

If direction of the arrow is perpendicular to the central groove?

Back 3

Movement is working

Front 4

The mandibular 1pM opposes?

Back 4

Max 1pM and Max Canine

Front 5

Where are the balancing cusps?

Back 5

1) They all oppose interproximal embrasures,
2) BU of 1st and MBU of 2nd second: B grooves of lowers
3) DL of lower 1,2 : DL grooves of uppers

Front 6

The Max 2pM oppose?

Back 6

Mand 2pM and 1M

Front 7

Arrows on the Mandibular teeth

Back 7

Always opposite the direction of the arrow

Front 8

What falls in the central fossa of the mandibular molars?

Back 8

Rule #4: ML of MM

Mesial lingual of Maxillary 1M and 2M Contact the central fossa of their respective lowers

Front 9

If the direction of the arrow is an oblique angle to the central groove:

Back 9

It is a non working or balancing movement

Front 10

Where do all the buccal cusps of the lower posterior teeth contact?

Back 10

EXCEPT DB of M1 M2

Mesial Marginal Ridges of the opposing maxillary

Buccal Lower-> m. Marg ridge Upper

Front 11

Arrows on the Maxillary teeth

Back 11

Always the same direction as the movement

Front 12

Where do all lingual cusps of the maxillary teeth contact?

Back 12

Except ML of MM

They contact the distal MR of the opposing mandibular teeth.

Lingual upper contact lower d.MR

Front 13

What are the working grooves?

Back 13

1) These tend to run perpendicular to the central groove

2) occlusobuccal grooves of the upper molars

3) Occlusolingual grooves of the lowers

Front 14

What falls in the central fossa of Maxillary molars?

Back 14

Rule #3: DB of M1&M2

The DB cusps of the lower 1M and 2M contacts the central fossa of the respective opposing molars

Front 15

What direction is the arrow of protrusive movement in both arches?

Back 15

1) Mesial in the maxillary arch
2) Distal in the Mandibular arch

Front 16

What are the 2 basic schemes of occlusion?

Back 16

1) cusp fossa
2) Cusp Marginal Ridge

Front 17

What are balancing "non-working" grooves?

Back 17

1) Tend to run at an oblique angle to the central groove

2)(oblique grooves)

Front 18

What do Mandibular Teeth oppose?

Back 18

RULE #1:
ALL MANDIBULAR TEETH OPPOSE THEIR OPPOSITE AND ONE TOOTH ANTERIOR

Front 19

In dental lab, we try to make everything cusp fossa. Why?

Back 19

That means the there is NO cusp marginal ridge.
1) MB of lower : Mesial Fossa upper
2) DL of upper : Distal Fossa Lower

Decreases shear forces

Front 20

What are the two basic types of occlusal schemes?

Back 20

1) Cusp fossa
2) Cusp Marginal Ridge: most common in natural occlusion