Step by step demonstration of designing a cast partial denture

1. CAST PARTIAL DENTURE DESIGNING
DR. AAMIR GODIL
DEPARTMENT OF PROSTHODONTICS
M. A .R.D.C
SCHEMATIC DEMONSTRATION OF A CLINICAL CASE

2. SEQUENCE OF COMPONENT DESIGNING
1.DIRECT RETAINER
INDIRECT RETAINER
RESTS
MINOR CONNECTOR
MAJOR CONNECTOR
DENTURE BASE AND ARTIFICIAL TEETH

3. All preparations are marked in RED
All acrylic are marked in BLUE
All metal components are marked in BROWN

4. CASE
EXAMPLE

5. MISSING
24 25
MISSING
15 16 17
14
13
12
11 21
22
23
26
27
Consider a partially
edentulous maxillary arch…

6. MISSING
24 25
MISSING
15 16 17
MAXILLARY KENNEDY’S CLASS II MODIFICATION 1 PARTIALLY EDENTULOUS ARCH

7. Step 1: Direct Retainer

8. MAXILLARY KENNEDY’S CLASS II MODIFICATION 1 PARTIALLY EDENTULOUS ARCH
STEP 1: DIRECT RETAINER
For distal extension:
1. RPI/ RPA
2. Reverse circlet clasp
3. Combination clasp
For tooth bound
edentulous spans:
1. I bar with rest
2. Simple circlet clasp
1. 2.
3.
1.
2.

9. MAXILLARY KENNEDY’S CLASS II MODIFICATION 1 PARTIALLY EDENTULOUS ARCH
STEP 1: DIRECT RETAINER
RPI/ RPA (14)
• Rest: Mesial
• Proximal plate: Distal
• I bar Simple Circlet/
Circumferential clasp (26)
• Retentive arm: Buccal
• Reciprocal arm: Palatal
• Rest (near zone): Mesial
Distal rest will cause tipping forces
Proximal plate provides reciprocation
I bar: more esthetic than Aker’s clasp
If it was a premolar, I bar with an
occlusal rest on near zone
I bar with cingulum rest
Schematic
representation
of
design
only

10. DIRECT
RETAINER
RPI clasp #14
I bar with cingulum rest #23
Simple circlet clasp #26

11. Step 2: Indirect Retainer

12. MAXILLARY KENNEDY’S CLASS II MODIFICATION 1 PARTIALLY EDENTULOUS ARCH
STEP 2: INDIRECT RETAINER Indirect retainer
Cingulum rest (23)
Already present as a part of direct retainer
Fulcrum line
A line drawn passing through
terminal abutments
Auxiliary Occlusal
Rest
Canine Rests
Canine Extensions
from Occlusal
Rests
Schematic
representation
of
design
only

13. MAXILLARY KENNEDY’S CLASS II MODIFICATION 1 PARTIALLY EDENTULOUS ARCH
STEP 2: INDIRECT RETAINER
Indirect retainer
Cingulum rest (23)
Fulcrum line
A line drawn passing through
terminal abutments
Cingulum Bars
(Continuous Bars)
and Linguoplates
Modification Areas Rugae Support
Schematic
representation
of
design
only

14. INDIRECT
RETAINER
Canine rest #13
OR
Canine extension from
occlusal rest

15. Step 3: Rests

16. MAXILLARY KENNEDY’S CLASS II MODIFICATION 1 PARTIALLY EDENTULOUS ARCH
STEP 3: RESTS
Cingulum rest
Occlusal rest
(mesial)
Cingulum rest
Occlusal rest
(mesial)
Schematic
representation
of
design
only

17. RESTS
Cingulum rest #13 Cingulum rest #23
Mesial rest #26

18. Step 4: Minor Connector

19. MAXILLARY KENNEDY’S CLASS II MODIFICATION 1 PARTIALLY EDENTULOUS ARCH
STEP 4: MINOR CONNECTOR
MINOR CONNECTOR
Connecting direct retainer to
major connector
MINOR CONNECTOR
Connecting direct retainer to
major connector
MINOR CONNECTOR
Connecting indirect retainer
to major connector
MESH TYPE MINOR
CONNECTOR
For smaller edentulous spans
LATTICE TYPE MINOR
CONNECTOR
For larger edentulous spans
Schematic
representation
of
design
only

20. MAXILLARY KENNEDY’S CLASS II MODIFICATION 1 PARTIALLY EDENTULOUS ARCH
STEP 4: MINOR CONNECTOR
MINOR CONNECTOR
COMMON MINOR
CONNECTOR
Canine extensions from
occlusal rest
MESH TYPE MINOR
CONNECTOR
LATTICE TYPE MINOR
CONNECTOR
Schematic
representation
of
design
only

21. MINOR
CONNECTOR
Lattice type minor
connector
From I bar #23
Mesh type minor connector
From simple circlet clasp #26
From RPI clasp and
indirect retainer

22. Step 5: Major Connector

23. STEP 5: MAJOR CONNECTOR
MAXILLARY KENNEDY’S CLASS II MODIFICATION 1 PARTIALLY EDENTULOUS ARCH
MAJOR
CONNECTOR
Antero-posterior
palatal strap/ bar
Schematic
representation
of
design
only

24. MAJOR
CONNECTOR
Antero-posterior palatal strap

25. Step 6: Denture base

26. MAXILLARY KENNEDY’S CLASS II MODIFICATION 1 PARTIALLY EDENTULOUS ARCH
STEP 6: DENTURE BASE
DENTURE BASE
Acrylic resin to support
artificial teeth
DENTURE BASE
Acrylic resin to support
artificial teeth
Schematic
representation
of
design
only

27. DENTURE
BASE
Denture base (blue)
Denture base (blue)

28. FINAL DESIGN

29. FINAL
DESIGN
Direct retainer
RPI clasp #14
Direct retainer
Simple circlet clasp #26
Minor Connector
Rest
Cingulum rest #23
Major Connector
AP strap
Artificial teeth
In denture base over mesh type minor connector
Artificial teeth
In denture base over
mesh type minor
connector
Indirect retainer
cingulum rest #14
Minor Connector
Direct retainer
I bar#23

30. THANK YOU
TIME FOR YOU TO DESIGN