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Prosthodontics > Minor Connectorsg > Flashcards

Minor Connectorsg Flashcards

1
Q

What are the parts of RPD that consider as minor connectors ?

A

-proximal plate minor connectors
-minor connectors are placed between the embrasures of adjacent teeth
-gridwork minor connectors

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2
Q

What is the function of minor connectors in general?

A

Connect the other components to the major connector

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3
Q

Enumerate the functions of minor connectors?

A
  1. Provide unification and rigidity.
  2. Provide stress distribution by transferring stresses from the major connector to other parts of the partial denture and from the partial denture to the abutment teeth.
  3. Act as bracing elements through contact with guiding planes opposing the retentive arms . 4. Maintain a path of insertion via contact with guiding planes .
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4
Q

Embrasure minor connector should be _____ in shape in cross section,why?

A

-Should be triangular
-to minimize intrusion into the tongue or vestibular spaces , while still providing adequate bulk for rigidity .

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5
Q

Embrasure minor connectors should be join the major connector at ____ angle

A

Right angle

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6
Q

Embrasure minor connectors should cover as_______an area of tissue as possible

A

Small

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7
Q

The juncture of the embrasure minor connector with major connector should be_____ and ____

A

Round and not sharp

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8
Q

In which area the embrasure minor connector should not be in contact with the tooth?

A

Below the height of contour

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9
Q

Why embrasure minor connector should not be contact the tooth below its height of contour?

A

Because Wedging force maybe created during functional movements of the framework

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10
Q

Embrasure minor connectors are placed directly or indirectly on the soft tissue?

A

Placed indirectly on the soft tissue by providing relief

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11
Q

The smooth surface of the embrasure minor connector should face the _____side,why?

A

-Lingual side
-to minimise food trapping

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12
Q

Embrasure minor connectors should be _____with the long axis of the tooth

A

Parallel

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13
Q

Types of gridwork minor connectors?

A

-mesh work
-lattice work

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14
Q

Advantages of mesh type minor connector?

A

-potential rigidity
-tends to be flatter than lattice

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15
Q

Disadvantages of mesh type minor connector?

A

-less retention of acrylic if the openings are insufficiently large

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16
Q

Advantages of lattice type minor connector?

A

-superior retentive potential of acrylic

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17
Q

Disadvantage of lattice type minor connector?

A

-interfere with the setting of teeth,(if it is made too thick or poorly positioned)

18
Q

How to gain adequate mechanical retention of the denture base resin?

A

By providing relief under the gridwork,(to allow the acrylic resin to flow under the gridwork)

19
Q

Thickness of relief was under the gridwork minor connector?

A

About 1mm

20
Q

Relief should not be started immediately adjacent to the abutment tooth,but should begin about____mm from the abutment

A

1.5-2mm

21
Q

Relief under the gridwork should not be started immediately adjacent to the abutment tooth,why?

A

This will create a metal to tissue contact immediately adjacent to the tooth.A metal surface is preferable since it wears less , and is less porous , thus facilitating hygiene.

22
Q

The junction between the gridwork minor connector and major connector should be…?

A

-should be in the form of butt joint with a slight undercut
-the angle should be not greater than 90 degree

23
Q

Why should the junction between gridwork minor connector and major connector in the form of butt joint?

A

This provides for maximum bulk of the acrylic resin denture base at the metal junction to prevent the creation of thin , weak , feather edges which can easily fracture or distort .

24
Q

Why should the junction between the gridwork minor connector and major connector in the form of butt joint?

A

This provides for maximum bulk of the acrylic resin denture base at the metal junction to prevent the creation of thin , weak , feather edges which can easily fracture or distort .

25
Q

Functions of finishing line?

A

1-Creates a definite limit to the plastic of the denture base.In this way the acrylic ends in a bulk of metal.
2-Undercut finishing line provide mechanical retention for acrylic denture base .
3-Provide a smooth transition from the acrylic base to metal framework .

26
Q

The definition of finish line?

A

The junction between the ladder area and the major connector or any polished metal surface

27
Q

Orientation of finishing line?

A

1-vertical:-in free end extension mandibular arch
2-horizontal:-
-in maxillary arch
-bounded area of mandible

28
Q

How long the extension of gridwork minor connector of the maxillary arch?

A

At least 2/3 of the length of ridge to hamular notch

29
Q

The junction of maxillary major connector with the gridwork should be approximately_____mm_______to an imaginary line along the lingual

A

2mm, medial

30
Q

The gridwork on a mandibular distal extension should extend about____ of the way from abutment tooth to________ but not on the ascending portion of the ridge____ to the_____ .

A

-2/3
-retromolar pad area
-mesial
-pad

31
Q
  • Mandibular distal extension gridworks should have a_________ at their posterior limit .
A

Tissue stopper

32
Q

How to make a tissue stop?

A

This is an extension of the metal through the relief wax providing direct contact of metal with the ridge .

33
Q

Functions of tissue stoppers?

A

1- space under gridwork to acrylic for acrylic retention .
2-stability to framework during the stages of processing .

34
Q

Proximal plate minor connector originates from____?

A

Gridwork minor connector

35
Q

Location of proximal plate minor connections?and in which form is it?

A

-On the proximal surface of the abutment tooth,adjacent to an edentulous area
-vertical metal plate

36
Q

The proximal plate minor connector is shifted slightly towards _____?

A

Lingual

37
Q

The proximal plate minor connector is shifted slightly towards lingual,why?

A

-to increase rigidity
-enhance reciprocation
-improve aesthetics

38
Q

It should have a______ cross section with the thickest portion near the _______of the tooth and the thinnest portion near the________ of the tooth.This configuration aids in__________

A

-triangular
-the lingual line angle
-the buccal line angle
-better arrangement of teeth

39
Q

Proximal plates extend cervically and contact the mucosa of the ridge crest for____mm

A

2-3mm

40
Q

The part of the proximal minor connector which contacts the ridge crest is called the ________of the proximal plate

A

Foot

Prosthodontics (2 decks)

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