Overdentures and Implants-Handout
Transcript of Overdentures and Implants-Handout
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Attachment Selection
• Overdentures- Ridge evaluation and esthetics• Fixed- Ridge evaluation, gingival esthetics• Number of implants• Anterior-Posterior spread• Opposing arch ??• Function
Fixed- Rigid, screw retainedOverdenture- Load bearing or non-load bearing
• Retention• Available space• Cost
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Patient Considerations• Parallel attachments for easier path of
insertion• Less attachments – better• Patient dexterity• Hygiene – Stannous Fluoride rinses• 3 month recall
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Anterior/Posterior Spread
A line from the center of the most anterior implant to a line joining the distal aspects
of the two most distal implants
Indicates the amount of cantilever that can be reasonably placed
Usually, 2.5 times the A/P spread
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A/P Spread
Actual Length of Cantilever Depends on:
• Stress factors• Parafunctional Habits• Crown heights• Implant width• Number of implants• Opposing teeth or denture
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Controlling StressStress=Force/Area
Stress
Area
Force
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Torque=
Force x Perpendicular distance from the line of force to the
center of rotation
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Cuspal Inclination
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Cuspal Inclination
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Treatment PlanOptions
Implant Supported Soft Tissue SupportedImplant Retained
Fixed Removable
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Treatment PlanOption 1
Lower EdentulousFixed
5-6 Implants
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Prosthetic Options-Lower5-6 Implants
• Hybrid Denture• Fixed Crown and Bridge• Cantilever 10-15mm
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22
2324 25
2627
6 Implants-Fixed Implant Supported
X
X X
X
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B
A
C D
E
5 Implants- FixedImplant Supported
X
X
X
X
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Treatment PlanOption 2
Lower EdentulousRemovable5 Implants
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Prosthetic Options- RemovableOverdenture-Implant Supported
• Gold Bar w/ O Rings• Distalized O Rings• Cantilever 10-20mm
• Gold Bar with Hader Clips• Distalized ERA’S• Cantilever 10-20mm
A
BC
D
E E
DC
B
A
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Treatment PlanOption 3
Lower EdentulousRemovable4 Implants
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Prosthetic Options- RemovableImplant and Tissue Supported
• Gold Bar with O Rings• Cantilever 5-10mm
• Gold Bar with Hader Clips and ERA’S
• Cantilever 5-10mm
ab c
d dcb
a
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Treatment PlanOption 4
Lower EdentulousRemovable3 Implants
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Prosthetic Options- Removable Overdenture-Lower
Implant and Tissue Supported
• Gold Bar w/ 2- O Rings-Overdenture
• No Cantilevers
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BC
D
3 Implants- Removable Overdenture Implant and Tissue Supported
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Treatment PlanOption 5
Lower EdentulousRemovable2 Implants
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Prosthetic Options Removable Overdenture-Lower
Tissue Supported
• Gold Bar w/ Hader Clip• O Ring on each implant• ERA attachment on each
implant
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B D
2 Implants-Removable Tissue Supported
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Treatment Plans
UpperEdentulous
Four Options
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Treatment PlanOption 1
Upper EdentulousFixed
8 Implants
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Prosthetic Options Fixed- Upper
Implant Supported
• Fixed Crown and Bridge• Hybrid Denture• No Cantilevers Necessary
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8 Implants- FixedImplant Supported
3
107
6
4
11
13
14
XX
XX
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Treatment PlanOption 2
Upper EdentulousRemovable8 Implants
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Prosthetic Options- 8 Implants Removable- UpperImplant Supported
• Gold Bar w/ O Rings- Overdenture
• Gold Bar w/ 3 Hader Clips Overdenture- No Palate
• Cantilevers-Optional
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• Gold Bar Overdenture w/ O Rings
• Gold Bar Overdenture w/ Hader Bar / Clips
3
11
13314
4
67
4
67
1314
1110 10
Palate No Palate
8 Implants- RemovableImplant Supported
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Treatment PlanOption 3
Upper EdentulousRemovable6 Implants
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Prosthetic Options Removable- UpperImplant Supported
• Gold Bar w/ 4- O Rings and distal to #s 4 and 13
• Gold Bar w/ Hader Clip- ERAS distal on #4 and 13- Overdenture-No Palate
• Cantilever 5-10mm
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6 Implants- RemovableImplant Supported
• Gold Bar w/ O Rings• 5-10mm Cantilever
• Gold Bar w/ Hader clips and ERA’s
• 5-10mm Cantilever
45 12
13
107
125
107
134
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Treatment PlanOption 4
Upper EdentulousRemovable4 Implants
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Prosthetic Options Removable- UpperTissue Supported
• Gold Bar w/4 O Rings- Overdenture w/ No Palate
• Gold Bar w/ Hader Clip and 2 distalized ERA attachments w/ Overdenture- No Palate
• No Cantilever
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Arch Form4 Implants-Tissue Supported
Square Arch Tapered Arch
4
6 11
13125
116
Maximum contact with tissue – No contact with BarAttachments are for retention ONLYONLY
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Treatment Planning
• Design sensibility and flexibility in the treatment plan
• Design and implant concepts will vary• Plan ahead for success• Have a disaster plan• In most cases, less attachments are better