Basic principles of Removable Partial Denture Design Dr. Emad Hanbali

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