Open Lattice Minor Connector Quiz and Flashcards in Dentistry

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Questions and Answers

What is the definition of a minor connector?

A connecting link between the major connector or base of a partial removable dental prostheses and the other units of the prostheses (correct)

A type of clasp assembly used in partial dentures

A connecting link between the major connector and the prosthetic teeth

A type of indirect retainer used in fixed partial dentures

Where should a minor connector be placed when it contacts the axial surface of an abutment?

On the occlusal surface of the abutment

On the convex surface of the abutment

In an embrasure to be less noticeable to the tongue (correct)

On the cervical third of the abutment

Why should the deepest part of the embrasure be blocked out?

To improve the aesthetics of the denture

To provide additional retention for the denture

To increase the rigidity of the minor connector

To prevent interference during insertion and removal, and to prevent the wedging effect on the contacted teeth (correct)

What is the purpose of tapering the minor connector on each side of an embrasure?

To avoid excessive bulk and sharp angles which affect the tongue, and to eliminate spaces that trap food Signup and view all the answers

What should be the direction of the minor connector as it passes from the major connector?

Vertical Signup and view all the answers

What is the purpose of tapering a minor connector to a knife edge?

To reduce the bulk of the connector Signup and view all the answers

What is an example of a minor connector?

The rest at each end of a linguoplate Signup and view all the answers

What is the ideal location of the bulk of the minor connector when setting an artificial tooth against a proximal plate?

To the lingual side Signup and view all the answers

What is the purpose of having sufficient bulk in a minor connector?

To make the minor connector rigid Signup and view all the answers

What is the purpose of tissue stops in minor connectors?

To provide retention to the resin bases Signup and view all the answers

Where can a minor connector be embedded?

In the resin denture base Signup and view all the answers

What is the design of minor connectors that attach the acrylic resin denture base?

Ladder or open lattice work designs or mesh pattern Signup and view all the answers

What is the recommended extension of minor connectors in mandibular distal extension bases?

Two thirds of the length of the ridge Signup and view all the answers

What is the benefit of extending minor connectors to two thirds of the length of the ridge in mandibular distal extension bases?

To provide strength and minimize distortion of the cured resin base Signup and view all the answers

In which type of bases should the minor connector extend the full length of the residual ridge?

Maxillary distal extension bases Signup and view all the answers

What is the primary function of minor connectors?

To attach the acrylic resin denture base Signup and view all the answers

What is the primary purpose of having a strong butt-type joint in the finish lines?

To provide a mechanical connection between the resin denture base and the major connector Signup and view all the answers

What is the maximum angle allowed for the junction between the major connector and the minor connector?

90 degrees Signup and view all the answers

Where should the palatal finish line be located in relation to an imaginary line contacting the lingual surfaces of the missing posterior teeth?

2 mm medial Signup and view all the answers

What is the consequence of locating the finish line too far buccally?

It will interfere with the setting of the artificial teeth Signup and view all the answers

What is the purpose of a 'finish line' in the PRDP framework?

To determine the demarcation between the major and minor connectors Signup and view all the answers

What is the main concern if the angle between the major connector and the minor connector is more than 90 degrees?

It will prevent a strong mechanical connection Signup and view all the answers

Study Notes

Minor Connectors

Definition: The connecting link between the major connector or base of a partial removable dental prostheses and other units of the prostheses, such as the clasp assembly, indirect retainers, occlusal rests, or cingulum rests.
Examples: The rest at each end of a linguoplate is the terminus of a minor connector; parts of the denture framework that retain the denture bases are also minor connectors.

Form and Location

Should have sufficient but not excessive bulk to be rigid.
When contacting the axial surface of an abutment, it should not be placed on convex surfaces, but in an embrasure to be less noticeable to the tongue.
Should pass vertically from the major connector to minimize gingival coverage.
The deepest part of the embrasure should be blocked out to prevent interference during insertion and removal and to prevent the wedging effect on the contacted teeth.
On each side of an embrasure, it should be tapered to the teeth to avoid excessive bulk and sharp angles, and to eliminate spaces that trap food.
Those that contact the guiding plane surface are either as a connected part of a direct retainer assembly or as a separate entity.
If it gives rise to a clasp arm, the connector should be tapered to the tooth below the origin of the clasp; otherwise, it should be tapered to a knife edge.
If an artificial tooth is set against a proximal plate, the largest bulk of the connector should be to the lingual side, allowing a better contact of the artificial teeth with the abutment and displaying less metal between them.
The portions of the denture framework that attach the acrylic resin denture base are minor connectors, which can be Ladder or open lattice work designs or mesh patterns, completely embedded within the denture base.
In mandibular distal extension bases, the minor connector should extend to two-thirds of the length of the ridge and have elements on both the buccal and lingual sides to provide strength and minimize distortion of the cured resin base during processing.
In maxillary distal extension bases, the minor connector must extend the full length of the residual ridge.

Tissue Stops

Definition: Parts of the minor connectors designed for the retention of the resin bases, providing stability to the frame during processing and preventing distortion of the framework during processing.

Finish Lines

Definition: A line of demarcation determined by two points, in PRDP framework, it is the junction between the major connector and minor connector.
Mandibular: The junction between the major connector and the mandibular minor connector should be a strong butt-type joint, with an angle not more than 90 degrees, to ensure better mechanical connection between the resin denture base and the major connector.
Maxillary: The junction between the major connector and the maxillary minor connector should be a strong butt-type joint, with an angle not more than 90 degrees, to ensure better mechanical connection between the resin denture base and the major connector.
The palatal finish line should be located 2 mm medial from an imaginary line contacting the lingual surfaces of the missing posterior teeth.
The finish line should not be located too medially to avoid altering the natural contour of the palate, and should not be placed too far buccally to avoid interfering with the setting of the artificial teeth.

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Description

This quiz covers the definition and functions of minor connectors in partial removable dental prostheses. It explains their role in connecting the major connector or base to other units of the prostheses.

Minor Connectors in Dentistry