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Questions and Answers
A stress breaker in dentistry is a device that increases occlusal forces on specific dental structures.
A stress breaker in dentistry is a device that increases occlusal forces on specific dental structures.
False
Stress breakers redirect forces from one area to another bearing structure.
Stress breakers redirect forces from one area to another bearing structure.
True
The aim of stress breaking in dentistry includes directing occlusal forces away from the abutment teeth.
The aim of stress breaking in dentistry includes directing occlusal forces away from the abutment teeth.
False
Sharing load between natural teeth and saddle areas is not a consideration in stress breaking according to the text.
Sharing load between natural teeth and saddle areas is not a consideration in stress breaking according to the text.
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The RPI system stands for Rest, Plate, and I-bar, with the rest mesially located and the proximal plate on the abutment distally.
The RPI system stands for Rest, Plate, and I-bar, with the rest mesially located and the proximal plate on the abutment distally.
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The retentive tip in the RPI system is positioned distal to the mesiodistal height of contour.
The retentive tip in the RPI system is positioned distal to the mesiodistal height of contour.
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When a functional load is applied to the extension base in the RPI system, the proximal plate disengages from the guiding plane.
When a functional load is applied to the extension base in the RPI system, the proximal plate disengages from the guiding plane.
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The I-bar in the RPI system moves towards the distal embrasure when a functional load is applied, reducing the forces on the abutment tooth.
The I-bar in the RPI system moves towards the distal embrasure when a functional load is applied, reducing the forces on the abutment tooth.
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The combination clasp is harsher to the associated abutment than a traditional half-round clasp arm would be.
The combination clasp is harsher to the associated abutment than a traditional half-round clasp arm would be.
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The vertical forces applied on distal extension base must pass anteriorly along the upper bar first.
The vertical forces applied on distal extension base must pass anteriorly along the upper bar first.
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The split bar is designed to allow the direct transfer of vertical forces to the abutment tooth.
The split bar is designed to allow the direct transfer of vertical forces to the abutment tooth.
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The combination clasp arm permits movement in multiple directions for the wire-retained arm.
The combination clasp arm permits movement in multiple directions for the wire-retained arm.
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Study Notes
Stress Breakers in Dentistry
- Devices designed to increase occlusal forces on specific dental structures.
- Redirect occlusal forces from one area to another bearing structure.
- Main goal is to direct forces away from abutment teeth.
RPI System
- Stands for Rest, Plate, and I-bar.
- Rest is positioned mesially, with the proximal plate located on the distal abutment.
- Retentive tip of the I-bar is placed distal to the mesiodistal height of contour.
Functional Load Effects
- When functional load is applied to the RPI system's extension base, the proximal plate disengages from the guiding plane.
- I-bar shifts toward the distal embrasure under load, reducing forces on the abutment tooth.
Clasp Design Considerations
- Combination clasps exert greater stress on the associated abutment compared to traditional half-round clasp arms.
- Vertical forces on distal extension bases must first travel through the upper bar anteriorly.
- Split bar design facilitates direct vertical force transfer to the abutment tooth.
- Combination clasp arm allows multifunctional movement for the wire-retained arm.
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Description
Test your knowledge of Prosthodontics lecture 12 focusing on topics such as the RPI system and clasp stress breaking effects. Questions cover the positioning of the retentive tip and the components of the RPI system.
