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8/6/2019 08 Denture Bases Ppt 4010
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DENTURE BASESDENTURE BASESDENTURE BASESDENTURE BASES
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FunctionsFunctionsFunctionsFunctions
Support & retain dentureSupport & retain denture
teethteeth
Stress distributionStress distribution -- surfacesurface
areaarea
ImproveestheticsImproveesthetics
Support & retain dentureSupport & retain denture
teethteeth
Stress distributionStress distribution -- surfacesurface
areaarea
ImproveestheticsImproveesthetics
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AdvantagesAdvantagesAdvantagesAdvantages
EstheticallysuperiortoEstheticallysuperiorto
metalbasesmetalbases
EaseofrepairEaseofrepair
EstheticallysuperiortoEstheticallysuperiorto
metalbasesmetalbases
EaseofrepairEaseofrepair
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DisadvantagesDisadvantagesDisadvantagesDisadvantages
DimensionalstabilityDimensionalstability--
warpagewarpageLowerstrength/wearLowerstrength/wearresistancethan metalresistancethan metal
PorousPorous -- hygienehygieneLowthermalconductivityLowthermalconductivity
DimensionalstabilityDimensionalstability--
warpagewarpageLowerstrength/wearLowerstrength/wearresistancethan metalresistancethan metal
PorousPorous -- hygienehygieneLowthermalconductivityLowthermalconductivity
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Metal BasesM
etal BasesM
etal BasesM
etal Bases
Smalledentulousspaces (noroom forSmalledentulousspaces (noroom for
gridworkgridwork
Lessesthetic (metalshowthrough)Lessesthetic (metalshowthrough)
Smalledentulousspaces (noroom forSmalledentulousspaces (noroom for
gridworkgridwork
Lessesthetic (metalshowthrough)Lessesthetic (metalshowthrough)
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BeadedM
etal BaseBeadedM
etal BaseBeadedM
etal BaseBeadedM
etal Base
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AdvantagesAdvantagesAdvantagesAdvantages
ThermalconductivityThermalconductivity
SwallowinghotsubstancesSwallowinghotsubstancesImproved thermalperceptionImproved thermalperception
ThermalconductivityThermalconductivity
SwallowinghotsubstancesSwallowinghotsubstancesImproved thermalperceptionImproved thermalperception
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AdvantagesAdvantagesAdvantagesAdvantages
HygieneHygiene
MetallessporousthanresinMetallessporousthanresin
Lessfood, plaque & calculusLessfood, plaque & calculus
accumulationaccumulation
HygieneHygiene
MetallessporousthanresinMetallessporousthanresin
Lessfood, plaque & calculusLessfood, plaque & calculus
accumulationaccumulation
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Flange ExtensionFlange ExtensionFlange ExtensionFlange Extension
ToothTooth-- tissuesupported partialtissuesupported partial
denturesshould be maximallydenturesshould be maximallyextended forsupport &extended forsupport &
retentionretention
NooverextensionorNooverextensionorimpingement on movableimpingement on movable
bordertissuesbordertissues
ToothTooth-- tissuesupported partialtissuesupported partial
denturesshould be maximallydenturesshould be maximallyextended forsupport &extended forsupport &
retentionretention
NooverextensionorNooverextensionorimpingement on movableimpingement on movable
bordertissuesbordertissues
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Flange ExtensionFlange ExtensionFlange ExtensionFlange Extension
Class I & II RPDsClass I & II RPDs
PosteriorextensionsameasaPosteriorextensionsameasa
complete denturecomplete denture
Hamularnotches, retromolarHamularnotches, retromolarpadspads
Class I & II RPDsClass I & II RPDs
PosteriorextensionsameasaPosteriorextensionsameasa
complete denturecomplete denture
Hamularnotches, retromolarHamularnotches, retromolarpadspads
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Flange ExtensionFlange ExtensionFlange ExtensionFlange Extension
Soft Tissue UndercutsSoft Tissue UndercutsSoft Tissue UndercutsSoft Tissue Undercuts
Do Not Relieve
Excessively
Do Not Relieve
ExcessivelyShorten FlangeShorten FlangeDeep UndercutDeep Undercut
XX
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Acrylic ResinFinishLinesAcrylic ResinFinishLinesAcrylic ResinFinishLinesAcrylic ResinFinishLines
Internal & externalfinishInternal & externalfinish
linesshould notcoincidelinesshould notcoincide
Internal & externalfinishInternal & externalfinish
linesshould notcoincidelinesshould notcoincide
m ajor connectoredentulousridge
slightundercut
staggered finish lines
gridwork
Acrylicdenture
b a s e
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Replacement ToothReplacement Tooth
ModificationModification
Replacement ToothReplacement Tooth
ModificationModification
palatalmajorconnector
ReplacementtoothReplacementtooth
Proximal PlateProximal Plate
adjust underneathocclusal surface adjust underneathocclusal surface
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Occlusal SchemeOcclusal SchemeOcclusal SchemeOcclusal Scheme
Variesfrom fullybalancedVariesfrom fullybalanced
(opposingacomplete denture),(opposingacomplete denture),toanterior disclusiontoanterior disclusion
As moreoftheocclusaltableisAs moreoftheocclusaltableis
involved, the moreabalancedinvolved, the moreabalancedocclusalscheme maybeofocclusalscheme maybeof
benefitbenefit
Variesfrom fullybalancedVariesfrom fullybalanced
(opposingacomplete denture),(opposingacomplete denture),toanterior disclusiontoanterior disclusion
As moreoftheocclusaltableisAs moreoftheocclusaltableis
involved, the moreabalancedinvolved, the moreabalancedocclusalscheme maybeofocclusalscheme maybeof
benefitbenefit