What is rest seat?

A REST PREPARATION or REST SEAT is any portion of a tooth or restoration properly prepared to receive a rest.

Where should rest seats be placed?

Rests should always be located on properly prepared tooth surfaces. The prepared surface of an abutment to receive the rest is called the rest seat. Rests are designated by the surface of the tooth prepared to receive them (occlusal rest, lingual rest, and incisal rest).

How deep should rest seats be?

An incisal rest seat should appear as a small, V-shaped notch located approximately 1.5 to 2.0 mm from the proximal-incisal angle of the tooth. The deepest part of the preparation should be toward the center of the tooth mesiodistally.

What is denture 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.

What is altered cast technique?

The altered cast technique allows the ridge, recorded in functional form, to be related to the teeth so that when the prosthesis is seated, it derives support simultaneously from the teeth and the denture base.

What is canine rest?

4. Rest : According to GPT 9  A rigid extension of a removable partial denture that contacts the occlusal, incisal, cingulum, or lingual surface of a tooth or restoration, the surface of which is commonly prepared to receive it.

What is Tripoding in RPD?

Tripoding method is the simplest and traditionally used for recording the final orientation of the cast on the surveyor. It uses an analyzing rod or the carbon marker to locate and mark three points on the prominent areas of the cast.

What is RPA clasp?

T he RPA clasp (rest, proximal plate, Akers clasp)? was developed at the University of the Pacific School of Dentistry to overcome some of the problems encoun- tered with the RPI clasp (rest, proximal plate, I-bar clasp).

What is minor connector?

A MINOR CONNECTOR is the connecting link between the major connector or base of a RPD and the other units of the prosthesis, such as clasps, indirect retainers, and occlusal rests.

What is guide plane?

Guiding planes are surfaces on proximal or lingual surfaces of teeth that are parallel to each other and, more importantly, to the parts of insertions and removal of a removable partial denture. These planes may be created on enamel surfaces or on the surfaces of dental restorations.

What is cavity preparation?

Cavity preparation, the procedure used to remove demineralized enamel and infected dentin consists of four steps: Opening a cavity or removing a poorly fitting restoration. Removing infected dentin. Evaluating residual tooth tissue and removing unsupported or structurally compromised enamel. Finishing cavity margins.

What is tooth preparation?

Tooth preparation, which is a basic aspect of the treatment of hard-tissue dental diseases, is the process used for the quantitative preparation and formation of hard tissues on a patient’s diseased teeth. At present, tooth preparation is generally performed with a high-speed dental handpiece.

What is direct retainer?

A direct retainer is any unit of a removable dental prosthesis that engages an abutment tooth or implant to resist displacement of the prosthesis away from basal seat tissue.

What is RPI system?

1.  Introduction  Direct retainers  Clasps  I bar removable partial denture  RPI. RPI stands for: R Rest P Plate (proximal) I I bar clasp.

What is the fulcrum line?

Fulcrum line. An imaginary line around which a removable partial denture tends to rotate. Synonym: rotational axis.