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Grant32
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What is the main determinant of denture tooth position?
Functional anatomy
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How do we minimize inclined tipping forces?
With incisal guidance (within the confines of esthetics and phonetics)
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Features in a fully balanced anatomic occlusion set
30 degree posteriors
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Non-balanced monoplane occlusion sets
- Monline zero degree posteriors
- Hardy Cutters V-O posteriors
- Rational zero degree posteriors
- ***none of these have ramps***
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Balanced monoplane occlusion
- These all have ramps
- Monoline zero degree posteriors
- Rational zero degree posteriors
- Hardy cutters V-O posteriors
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Zero degree posteriors with Curvilinear balanced arrangement
- hardy cutters V-O posteriors
- Rational Zero degree posteriors
- ***Can't use hardy cutters, they're already monoplane and non-curvilinear
- ***Curvilinear arrangements maintains tooth-tooth balance on the balancing side and working side
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How do patients deal with balanced and non-balanced sets?
- 1)no patient preference
- 2) balanced is slightly more efficient
- 3) Percentage of patients using eccentric movements during mastication is small
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What is the relationship between ridge resorption and cuspal inclination?
The flatter the ridge, the more cusp inclination should decrease
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Balanced Semi-anatomic occlusion sets
Anatoline 10 degree posteriors
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Where is the least resistant tissue on the ridge?
- Just above the mylohyoid ridge
- Lateral to the tongue, lingual to the ridge
- keratinized tissue is not very good
- **Flatter cuspal inclination will help this
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How to we reduce the resorption on the mandibular ridges?
- Lingualized occlusion
- These have milled mandibular posteriors (flatter inclines) and 30 degree maxillary lingual cusps
- The goal is to not have any buccal contacts to reduce lateral forces against the ridges
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What happens on the working side of ortholingual sets?
There is no contact on the buccal cusps, but they do exist on the lingual cusps
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What are the indications for lingualized occlusion?
- Severe mandibular ridge atrophy
- Displaceable supporting tissues
- malocclusion
- Previous successful setup had lingualized occlusion
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What are the advantages of lingualized occlusion?
- Good esthetics
- Freedom like non-anatomic teeth
- Bilateral balance
- Centralized vertical forces
- Bolus penetration
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