This document discusses the design considerations for different classes of removable partial dentures. It covers key aspects like location of retention, types of direct and indirect retainers, major connectors, bases, and how to avoid undesirable movements. The classes covered are maxillary and mandibular Class I-IV removable partial dentures. Design features are tailored based on tooth support and location of tooth loss for each class.

1. Prosthodontics
3rd Year
DESIGN OF REMOVABLE
PARTIAL DENTURE
Dr. Loreidys Castañeda

2. MAXILLARY CLASS I
TOOTH - TISSUE SUPPORT
 Location of the retention: Distal.
 Direct Retainers: Bar clasp, back action.
 Indirect retainers: Double rest.
 Major Connector: Complete palatal coverage.
 Base: Maximum support.

3. MAXILLARY CLASS I

4. MANDIBULAR CLASS I
TOOTH - TISSUE SUPPORT
 Location of the retention: Distal.
 Direct Retainers: Bar clasp, back action.
 Indirect retainers: Double rest.
 Major Connector: Lingual bar, lingual plate.
 Base: Maximum support.

5. MANDIBULAR CLASS I

6. MAXILLARY CLASS II
TOOTH - TISSUE SUPPORT
 Location of the retention: Distal.
 Direct Retainers: Back action, bar clasp,
circumferential.
 Indirect retainers: Occlusal rest.
 Major Connector: Single broad straps
 Base: Maximum support.

7. MAXILLARY CLASS II

8. MANDIBULAR CLASS II
TOOTH - TISSUE SUPPORT
 Location of the retention: Distal.
 Direct Retainers: Back action, bar clasp,
circumferential.
 Indirect retainers: Occlusal rest.
 Major Connector: Bar, lingual plate
 Base: Maximum support.

9. MAXILLARY CLASS III
TOOTH SUPPORT
 Location of the retention: Distal, mesial.
 Direct Retainers: Circumferential, back action,
bar clasp.
 Indirect retainers: Circumferential.
 Major Connector: Bar, straps.
 Base: Minimal extension.

10. MAXILLARY CLASS III

11. MANDIBULAR CLASS III
TOOTH SUPPORT
 Location of the retention: Distal, mesial.
 Direct Retainers: Circumferential, bar clasp,
back action.
 Indirect retainers: Circumferential.
 Major Connector: Bar.
 Base: Minimal extension.

12. MAXILLARY CLASS IV
TOOTH SUPPORT
 Location of the retention: Mesial, distal.
 Direct Retainers: Back action, bar clasp,
circumferential.
 Indirect retainers: Circumferential.
 Major Connector: U- shape, bar.
 Base: Minimal or maximal extension.

13. MAXILLARY CLASS IV

14. MANDIBULAR CLASS IV
TOOTH SUPPORT
 Location of the retention: Mesial, distal.
 Direct Retainers: Bar clasp, back action,
circumferential.
 Indirect retainers: Circumferential.
 Major Connector: Lingual bar.
 Base: Minimal or maximal extension.

15. MOVEMENTS OF REMOVABLE
PARTIAL DENTURES
CLASS I AND II

16. MOVEMENTS OF REMOVABLE PARTIAL DENTURES
CLASS I AND II
MOVEMENT HOW TO AVOID
Intrusion Occlusal support.
Retentive arm of direct retainers.
Extrusion
Indirect retainers.
Indirect retainers.
Ship (Hinge)
Retentive arm of direct retainers.
Bounce Indirect retainers.

17. MOVEMENTS OF REMOVABLE
PARTIAL DENTURES

18. MOVEMENTS OF REMOVABLE PARTIAL DENTURES
CLASS III
MOVEMENT HOW TO AVOID
Intrusion Occlusal support.
Retentive arm of direct retainers.
Extrusion
Indirect retainers.
Indirect retainers.
Ship (Hinge)
Retentive arm of direct retainers.

19. MOVEMENTS OF REMOVABLE PARTIAL DENTURES
CLASS IV
MOVEMENT HOW TO AVOID
Ship (Hinge) Mesial and distal retention.
Intrusion Occlusal support.
Retentive arm of direct retainers.
Extrusion
Mesial and distal retention.