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
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
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
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
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
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