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20 Cards in this Set
- Front
- Back
What are balancing cusps and what do they do?
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These are the nonfunctioning cusps (BULL)
They protect the soft tissues |
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What do Maxillary Teeth oppose?
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RULE #2:
ALL MAXILLARY TEETH OPPOSE THEIR OPPOSITE AND ONE TOOTH POSTERIOR |
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If direction of the arrow is perpendicular to the central groove?
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Movement is working
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The mandibular 1pM opposes?
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Max 1pM and Max Canine
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Where are the balancing cusps?
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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 |
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The Max 2pM oppose?
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Mand 2pM and 1M
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Arrows on the Mandibular teeth
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Always opposite the direction of the arrow
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What falls in the central fossa of the mandibular molars?
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Rule #4: ML of MM
Mesial lingual of Maxillary 1M and 2M Contact the central fossa of their respective lowers |
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If the direction of the arrow is an oblique angle to the central groove:
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It is a non working or balancing movement
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Where do all the buccal cusps of the lower posterior teeth contact?
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EXCEPT DB of M1 M2
Mesial Marginal Ridges of the opposing maxillary Buccal Lower-> m. Marg ridge Upper |
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Arrows on the Maxillary teeth
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Always the same direction as the movement
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Where do all lingual cusps of the maxillary teeth contact?
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Except ML of MM
They contact the distal MR of the opposing mandibular teeth. Lingual upper contact lower d.MR |
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What are the working grooves?
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1) These tend to run perpendicular to the central groove
2) occlusobuccal grooves of the upper molars 3) Occlusolingual grooves of the lowers |
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What falls in the central fossa of Maxillary molars?
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Rule #3: DB of M1&M2
The DB cusps of the lower 1M and 2M contacts the central fossa of the respective opposing molars |
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What direction is the arrow of protrusive movement in both arches?
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1) Mesial in the maxillary arch
2) Distal in the Mandibular arch |
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What are the 2 basic schemes of occlusion?
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1) cusp fossa
2) Cusp Marginal Ridge |
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What are balancing "non-working" grooves?
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1) Tend to run at an oblique angle to the central groove
2)(oblique grooves) |
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What do Mandibular Teeth oppose?
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RULE #1:
ALL MANDIBULAR TEETH OPPOSE THEIR OPPOSITE AND ONE TOOTH ANTERIOR |
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In dental lab, we try to make everything cusp fossa. Why?
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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 |
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What are the two basic types of occlusal schemes?
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1) Cusp fossa
2) Cusp Marginal Ridge: most common in natural occlusion |