Basic principles of Removable Partial Denture Design

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Basic principles of Removable Partial Denture
Design

• Dr. Emad Hanbali

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Outline

• Outline the edentulous areas to be restored
• The classification
• The primary abutments
• The guiding planes
• The anterior posterior tilt

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Unmodified
Class III
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Unmodified
Class III
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GP 1
Primary abutments
GP 2
Unmodified
Class III
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AP tilt
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Support
Uniform
Dual
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GP 1
Primary supporting elements
GP 2
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The Introduction of

• One rest pivot
• Two rests fulcrum

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Basic principle of design

• Cross-arch stabilization
• Indirect retention
• Indirect support

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GP 1
Imaginary fulcrum line
GP 2
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GP 1
X
GP 2
Perpendicular bisector of fulcrum line to mark
the most suitable sight for setting of indirect
retention rests and indirect supporting clasps.
X
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GP 1
X
GP 2
X
Short span triangular configuration
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GP 1
Long span trapezoidal configuration
X
GP 2
X
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Connectors

1. Major Connector
2. Minor Connector

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Mesh
Minor connector
Mid palatal strap major connector
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6-8 mm
AP Palatal strap
Ridged design
Hygienic design
Patient tolerance
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Retention Direct retainers

• Clasp assembly
• Minor connector
• Rest
• Retentive arm
• Reciprocal arm

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OSCAR

• O Outline
• S Support
• C Connector
• A
• R Retention

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E
N
J
O
Y