Single Denture Complete(5_nguyen Thi Thuy Diem)
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Single Complete Dentures Maxillary Single Dentures •
•
More common Teeth usually lost before their mandibular antagonists
Mandibular Single Dentures •
Avoid when possible
•
•
Severe ridge resorption due to force Stress reduction should be used o
Processed resilient denture liner Overdenture
o
Implant retained denture
o
Single Dentures • •
More difficult Greater force causes o Displacement o Fracture due to flexure o Severe residual ridge resorption
Single Dentures
•
•
•
More difficult Tooth malpositions decrease stability (extrusion, tipping, rotation) Difficulty balancing
Single Complete Denture •
Occlusal adjustment of natural teeth o
o
Reduce severe curve of Spee level supraeruptions Recontour rotated teeth to permit contacts on flat surfaces
Single Complete Dentures o
Reduce cusps in shaded area, to level plane of occlusion
Mock adjustment can be performed on a diagnostic cast Severe Curve of Spee Supereruption
Avoid a Single Denture Against Anterior Teeth Alone •
Resorption
•
•
•
Loosening Fracture Combination Syndrome
Avoid a Single Denture Against Anterior Teeth Alone •
•
Fabricate a RPD for Stress Distribution Make CD & RPD at the same time o
Ensures optimal occlusion
Occlusion Rims •
•
Use to establish OVD, NOT Incisal Display Overbite will be incorporated when anterior teeth are set, lengthening incisal edges
Occlusion Rims •
Flat Surface for Opposing Teeth o
No inclines
o
If steps in occlusal plane, provide flat areas for opposing natural teeth
X Maxillo-Mandibular Relations • • •
•
Occlusion Rims on RPD framework Opposes CD Rims Centric and eccentric records with Alluwax Optimizes occlusion
Maxillo-Mandibular Relations
•
•
•
Crowns or bridges should be waxed up against the CD tooth setup Optimizes occlusion Ensures, changes can be made
Maxillo - Mandibular Relations •
Centric Registration CUD usually stable o
o
Extraoral hand position if opposing natural dentition (less obtrusive)
Setting Anterior Teeth •
More difficult o
o o
Setting for esthetics may produce excessive overbite with natural teeth Decreases stability Compromised position, used to balance need for esthetics & function
Posterior Denture Teeth
•
Requires more adjustment to obtain stable centric contacts Denture teeth will not normally articulate well with natural dentition Pinpoint contacts/inclines, etc. o
o
Tip: • • •
Increase incisal pin 1mm Set posterior teeth Let wax harden
• •
Return pin to original position Adjust occlusion until pin touches table
Cast Metal Denture Base •
•
Use if denture fractures repeatedly Usual causes: o o o
Heavy forces from natural teeth Occlusal contacts on inclines Impingement on a bony midline
flexing of the denture
Denture Teeth Wear
•
•
•
More rapid against natural teeth More frequent recalls Adjust occlusion to prevent changes in stress distribution
Denture Teeth Wear More Rapidly •
Never use porcelain denture teeth o o
Severe attrition of natural teeth Prefer denture teeth to wear
Single Complete Dentures Maxillary Single Dentures •
•
More common Teeth usually lost before their mandibular antagonists
Mandibular Single Dentures •
Avoid when possible
•
•
Severe ridge resorption due to force Stress reduction should be used o
Processed resilient denture liner Overdenture
o
Implant retained denture
o
Single Dentures • •
More difficult Greater force causes o Displacement o Fracture due to flexure o Severe residual ridge resorption
Single Dentures
•
•
•
More difficult Tooth malpositions decrease stability (extrusion, tipping, rotation) Difficulty balancing
Single Complete Denture •
Occlusal adjustment of natural teeth o
o
Reduce severe curve of Spee level supraeruptions Recontour rotated teeth to permit contacts on flat surfaces
Single Complete Dentures o
Reduce cusps in shaded area, to level plane of occlusion
Mock adjustment can be performed on a diagnostic cast Severe Curve of Spee Supereruption
Avoid a Single Denture Against Anterior Teeth Alone •
Resorption
•
•
•
Loosening Fracture Combination Syndrome
Avoid a Single Denture Against Anterior Teeth Alone •
•
Fabricate a RPD for Stress Distribution Make CD & RPD at the same time o
Ensures optimal occlusion
Occlusion Rims •
•
Use to establish OVD, NOT Incisal Display Overbite will be incorporated when anterior teeth are set, lengthening incisal edges
Occlusion Rims •
Flat Surface for Opposing Teeth o
No inclines
o
If steps in occlusal plane, provide flat areas for opposing natural teeth
X Maxillo-Mandibular Relations • • •
•
Occlusion Rims on RPD framework Opposes CD Rims Centric and eccentric records with Alluwax Optimizes occlusion
Maxillo-Mandibular Relations
•
•
•
Crowns or bridges should be waxed up against the CD tooth setup Optimizes occlusion Ensures, changes can be made
Maxillo - Mandibular Relations •
Centric Registration CUD usually stable o
o
Extraoral hand position if opposing natural dentition (less obtrusive)
Setting Anterior Teeth •
More difficult o
o o
Setting for esthetics may produce excessive overbite with natural teeth Decreases stability Compromised position, used to balance need for esthetics & function
Posterior Denture Teeth
•
Requires more adjustment to obtain stable centric contacts Denture teeth will not normally articulate well with natural dentition Pinpoint contacts/inclines, etc. o
o
Tip: • • •
Increase incisal pin 1mm Set posterior teeth Let wax harden
• •
Return pin to original position Adjust occlusion until pin touches table
Cast Metal Denture Base •
•
Use if denture fractures repeatedly Usual causes: o o o
Heavy forces from natural teeth Occlusal contacts on inclines Impingement on a bony midline
flexing of the denture
Denture Teeth Wear
•
•
•
More rapid against natural teeth More frequent recalls Adjust occlusion to prevent changes in stress distribution
Denture Teeth Wear More Rapidly •
Never use porcelain denture teeth o o
Severe attrition of natural teeth Prefer denture teeth to wear
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