What is a fulcrum line?

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

Where is the 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).

What is the function of indirect retainer?

The function of the indirect retainer is to prevent the distal-extension base from moving away from its seat because of cheek and tongue forces, sticky foods, or gravity on a maxillary prosthesis.

Can flexible denture have indirect retainer?

UV PEN An indirect retainer is an auxiliary occlusal, cingulum, or incisal rest that contacts a properly designed rest seat when the removable partial denture is in place. In order to be effective, the indirect retainer must be rigid. If the indirect retainer is flexible, the prosthesis will not function as intended.

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 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 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 auxiliary rest in RPD?

Auxiliary or secondary rests  A rest that is responsible for additional support or indirect retention is called an auxiliary rest or secondary rest.  Are used as indirect retainers in extension base removable partial dentures (Class I, Class II, and long-span Class IV applications).

What is denture base?

DEFINITION. A denture base is that part of a denture which rests on the foundation areas and to which teeth are attached.

What is combination syndrome?

Combination syndrome (CS) is a dental condition that is commonly seen in patients with a completely edentulous maxilla and partially edentulous mandible with preserved anterior teeth.

What is balanced occlusion?

Balanced Occlusion is defined as the bilateral, simultaneous, anterior, and posterior occlusal contact of teeth in centric and eccentric positions. Balanced occlusion in complete dentures is unique, as it does not occur with natural teeth.

What is Ante’s law?

Ante’s law states that “the total periodontal membrane area of the abutment teeth must equal or exceed that of the teeth to be replaced.”1 For more than 80 years, this law has been taught in standard textbooks of prosthodontics as an important condition influencing FDP design.

What causes a pressure point dental?

Pressure sores caused by dentures can have various causes. A poorly fitted prosthesis is often a trigger. Tartar or deposits on or under the prosthesis can also cause unpleasant pain. You can alleviate the local discomfort.

Are rests indirect retainers?

Although it is customary to identify the entire assembly as the indirect retainer, it should be remembered that the rest is actually the indirect retainer united to the major connector by a minor connector.

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 Andrews bridge?

Andrews Bridge is a fixed-removable prosthesis that is one of the treatment modality indicated in patients with large ridge defects. The prosthesis successfully replaces the missing teeth along with complete closure of the defect, restoring speech and esthetics.

What is a telescopic crown?

The telescopic crown is defined as an artificial crown fabricated to fit over a coping (1). Telescopic crowns have been used mainly in removable dental prostheses (RDP) to connect the dentures to the remaining dentition (2, 3).

What is Maryland bridge in dentistry?

Regular Bridges. A Maryland bridge is a type of permanent dental restoration that can replace a missing tooth. The concept is similar to that of a typical dental bridge, in that a prosthetic tooth is attached to teeth on either side of the gap to create a seamless smile.