A fulcrum line is an imaginary line around which an RPD will tend to rotate. Fulcrum lines may be in the horizontal, frontal or vertical plane. Indirect retainers provide resistance to rotational movement of a distal extension RPD away from the denture bearing tissues around the retentive fulcrum line (Figure 2).
Where does the fulcrum line pass through the most posterior abutments?
and B, in class I arch, fulcrum line passes through the most posterior abutments, provided some rigid component of framework is occlusal to abutment's heights of contour. C in class II arch, fulcrum line is diagonal, passing through abutment on distal extension side and the most posterior abutment on opposite side.
What is a fulcrum line in dentistry?
FULCRUM LINES A fulcrum line is an imaginary line passing through vertical stops on teeth. Multiple fulcrum lines can be demonstrated on removable partial dentures.
What is a retentive Fulcrum line?
A fulcrum line is an imaginary line around which an RPD will tend to rotate. Fulcrum lines may be in the horizontal, frontal or vertical plane. Indirect retainers provide resistance to rotational movement of a distal extension RPD away from the denture bearing tissues around the retentive fulcrum line (Figure 2). Popular Trending About Us
Where is the fulcrum line on a retainer?
Fulcrum lines may be in the horizontal, frontal or vertical plane. Indirect retainers provide resistance to rotational movement of a distal extension RPD away from the denture bearing tissues around the retentive fulcrum line (Figure 2).
What is Fulcrum RPD?
FULCRUM LINES An imaginary line around which a partial denture tend to rotate (GPT 8).
How do you find the fulcrum line?
0:051:20RPD Fulcrum Lines in 1 min - YouTubeYouTubeStart of suggested clipEnd of suggested clipLine a fulcrum is a support on which a lever rotates in rpds the fulcrum line is an imaginary lineMoreLine a fulcrum is a support on which a lever rotates in rpds the fulcrum line is an imaginary line that connects the distal most rests of class 1 2 and 4 rpds rotation of the partial.
What is an internal finish line in RPD?
The internal finish line refers to the finish line on the tissue side of the framework (the side of the framework that rests on the tissue) and is generally placed farther from the abutment tooth or residual ridge than the external finish line.
What is an indirect retainer in RPD?
0:004:27Indirect retainer for the removable partial denture - YouTubeYouTubeStart of suggested clipEnd of suggested clipThe objective of this lesson is to understand the indirect retainer what it is when it is used. ThisMoreThe objective of this lesson is to understand the indirect retainer what it is when it is used. This slide gives the definition in the tooth tissue supported RPD the extension base is retained by a
How do you identify the fulcrum line in an RPD?
A fulcrum line is an imaginary line around which an RPD will tend to rotate. Fulcrum lines may be in the horizontal, frontal or vertical plane. Indirect retainers provide resistance to rotational movement of a distal extension RPD away from the denture bearing tissues around the retentive fulcrum line (Figure 2).
What is stress breaker in RPD?
❑ A stress breaker is something like a hinge joint placed within the. denture framework, which allows the two parts of the framework. on either side of the joint to move freely. ( Mc Cracken)
What is proximal plate?
Proximal plates extend from the proximal facial line angle of the tooth to, or slightly past, the proximal lingual line angle of the tooth. They are thin mesiodistally and taper slightly toward the occlusal (incisal). They extend from the occlusal/incisal of the tooth to the major connector.
What are finish lines?
Finish Line: It is the peripheral extension of tooth preparation or It is the terminal portion of a prepared tooth. Definition by Schwartz: Refers to the border of preparation where the prepared tooth structure meets the unprepared surface of the tooth.
What is RPI system?
RPI is a modified I-bar retainer system. Krol devised it in 1973. All the components of the I-bar assembly were modified significantly to fulfill Krol's design. Principle of Krol's design was – “Stress control with minimal tooth & gingival coverage”.
What is pier abutment?
Pier abutment, also named inter- mediate abutment, is defined by the Glossary. of Prosthodontic Terms as a natural tooth. located between terminal abutments that. serve to support a fixed or removable dental.
What are the 5 forms of indirect retainers?
Forms of Indirect RetainersAuxiliary occlusal rest.Canine rests.Canine extensions from occlusal rests.Cingulum bars (continuous bars) and linguoplates.Modification areas.Rugae support.
What is an occlusal rest?
An occlusal rest consists of two component parts-a horizontal portion and a vertical portion. The horizontal portion is that part which rests on the abutment tooth and transmits the forces of mastication to the tooth. The vertical com- ponent connects the horizontal part of the rest to the partial denture base.