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20 Cards in this Set

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What are balancing cusps and what do they do?
These are the nonfunctioning cusps (BULL)
They protect the soft tissues
What do Maxillary Teeth oppose?
RULE #2:

ALL MAXILLARY TEETH OPPOSE THEIR OPPOSITE AND ONE TOOTH POSTERIOR
If direction of the arrow is perpendicular to the central groove?
Movement is working
The mandibular 1pM opposes?
Max 1pM and Max Canine
Where are the balancing cusps?
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
The Max 2pM oppose?
Mand 2pM and 1M
Arrows on the Mandibular teeth
Always opposite the direction of the arrow
What falls in the central fossa of the mandibular molars?
Rule #4: ML of MM

Mesial lingual of Maxillary 1M and 2M Contact the central fossa of their respective lowers
If the direction of the arrow is an oblique angle to the central groove:
It is a non working or balancing movement
Where do all the buccal cusps of the lower posterior teeth contact?
EXCEPT DB of M1 M2

Mesial Marginal Ridges of the opposing maxillary

Buccal Lower-> m. Marg ridge Upper
Arrows on the Maxillary teeth
Always the same direction as the movement
Where do all lingual cusps of the maxillary teeth contact?
Except ML of MM

They contact the distal MR of the opposing mandibular teeth.

Lingual upper contact lower d.MR
What are the working grooves?
1) These tend to run perpendicular to the central groove

2) occlusobuccal grooves of the upper molars

3) Occlusolingual grooves of the lowers

What falls in the central fossa of Maxillary molars?
Rule #3: DB of M1&M2

The DB cusps of the lower 1M and 2M contacts the central fossa of the respective opposing molars
What direction is the arrow of protrusive movement in both arches?
1) Mesial in the maxillary arch
2) Distal in the Mandibular arch
What are the 2 basic schemes of occlusion?
1) cusp fossa
2) Cusp Marginal Ridge
What are balancing "non-working" grooves?
1) Tend to run at an oblique angle to the central groove

2)(oblique grooves)
What do Mandibular Teeth oppose?
RULE #1:
ALL MANDIBULAR TEETH OPPOSE THEIR OPPOSITE AND ONE TOOTH ANTERIOR
In dental lab, we try to make everything cusp fossa. Why?
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
What are the two basic types of occlusal schemes?
1) Cusp fossa
2) Cusp Marginal Ridge: most common in natural occlusion