3 Biomechanics Flashcards
1
Q
The four forces acting on an RPD
A
- Vertical (dislodging)
- Vertical (seating)
- Horizontal (lateral)
- Torsional (rotational/twisting)
2
Q
Three components of an RPD for retention
A
- Direct retainer
- Indirect retainer
- Denture base
3
Q
Three components of an RPD for support
A
- Rest seats
- Major connector (for maxillary)
- Denture bases
4
Q
Six components of an RPD for stability
A
- Minor connectors
- Proximal plates
- Bracing clasp arms and shoulders of circumferential retentive clasp arms
- Lingual plates
- Rests (channel rests)
- Denture bases
5
Q
Methods to minimize rotation around fulcrum line (5)
A
- Direct/indirect retainer
- Remove redundant/flabby tissue
- Condition supporting tissues before final impression
- Excellent border molded impression
- Altered cast impression to ensure proper tissue adaptation
6
Q
Methods to minimize rotation around longitudinal axis (3)
A
- Adequate primary retainer
- Engagement of guide planes
- Adequate tissue coverage and adaptation
7
Q
Methods to minimize rotation around vertical axis
A
- Engagement of guide planes by framework
2. Engagement of vertical surfaces of edentulous ridge by denture base
