6 Dx and Treatment Planning

Question 1

Six phases of RPD therapy (by McCracken

Answer 1

1. Patient education
2. Dx, TP, design, sequencing, mouth preps
3. Provide adequate support for distal extension denture base
4. Establish occlusal and tooth relationships with opposing
5. Initial placement, adjustments to denture base/occlusion, instructions
6. Continuing care, maintenance

Question 2

Combination Syndrome (5) (Kelly’s initial observations)

Answer 2

1. Loss of maxillary anterior bony ridge
2. Overgrowth of tuberosities
3. Palatal papillary hyperplasia
4. Extrusion of lower anterior teeth
5. Loss of bone under partial denture base

Question 3

Combination syndrome - Saunder’s additional observations in 1979 (6-11)

Answer 3

6. Epulis fissuratum
7. Poor prosthesis adaptation
8. Occlusal plane discrepancy
9. Anterior repositioning of mandible
10. Periodontal changes
11. Loss of vertical dimension

Question 4

RPD - Stabilizing components (4)

Answer 4

1. All minor connectors that contact a vertical tooth surface
2. Retentive/reciprocal arms
3. Guide plates
4. Base flanges

Question 5

Define guide plane

• Functions (3)

- Guide planes should be closer or father apart

Answer 5

At least 2 parallel vertical surfaces of abutment teeth to direct placement and removal of RPD

1. One path of placement/removal
2. Ensure intended actions of reciprocation, stabilization, and retentive components are achieved
3. Eliminate gross food traps

Guide planes should be further apart

Question 6

Proximal guide planes

• B-L position
• A-C position

Answer 6

B-L: 1/3 width between cusps and tooth surface

A-C: 2/3rd length of enamel portion from marginal ridge

Question 7

RPD supporting components (3)

Answer 7

1. Denture bases
2. Rest seats
3. Maxillary major connector

Question 8

RPD retentive components (3)

Answer 8

1. Direct retainers
2. Indirect retainers
3. Denture bases (adhesion/cohesion)