Basic principles of Basic principles of Removable Partial Removable Partial

Denture DesignDenture Design

Dr. Emad HanbaliDr. Emad Hanbali

OutlineOutlineOutline the edentulous areas to Outline the edentulous areas to

be restored :be restored :- The classificationThe classification- The primary abutmentsThe primary abutments- The guiding planes The guiding planes - The anterior posterior tiltThe anterior posterior tilt

Class III

Unmodified

Class III

Unmodified

Class III

Unmodified

GP 1

GP 2

Primary abutments

AP tilt

SupportSupport

UniformDual

GP 1

GP 2

Primary supporting elements

One rest = pivotOne rest = pivot

Two rests = Two rests = fulcrumfulcrum

The Introduction

of :

Basic principle of Basic principle of design :design :

Cross-arch stabilization :Cross-arch stabilization :

A)A) Indirect retention Indirect retention

B)B) Indirect supportIndirect support

GP 1

GP 2

Imaginary

fulcrum line

GP 1

GP 2Perpendicular

bisector of fulcrum line to mark the most suitable sight for setting of indirect retention rests and indirect supporting clasps.

X

X

GP 1

GP 2

X

X

Short span : triangular

configuration

GP 1

GP 2

X

X

Long span: trapezoidal configurati

on

Connectors:Connectors:

A)A) Major ConnectorMajor Connector

B)B) Minor ConnectorMinor Connector

Mid palatal strap major connector

Minor connector

Mesh

6-8 mm

AP Palatal strapRidged design

Hygienic designPatient tolerance

Retention : Direct Retention : Direct retainersretainers

Clasp assembly :

1.Minor connector

2.Rest

3.Retentive arm

4.Reciprocal arm

OSCAROSCAR

OO : : OOutlineutline

SS : : SSupportupport

CC : : CConnectoronnector

AA : : &&

RR : : RRetentionetention

E

N

J

O

Y