MAJOR AND MINOR CONNECTORS – Partial Denture MCQs

MAJOR AND MINOR CONNECTORS – Partial Denture MCQs

1. Which of the following is not a mandibular major connector
a) Lingual plate
b) Lingual bar
c) Lingual arch
d) Labial bar

2. The function of minor connector is
a) Connects major connector to all components of the RPD
b) Prevents gingival displacement of the RPD
c) Allows a single path of placement of the RPD
d) It is that unit of RPD to which all other parts are directly or indirectly attached

3. The most rigid palatal major connector is
a) A-P palatal bar
b) Palatal plate
c) Palatal bar
d) Horse shoe shaped palatal bar

4. Advantage of “U” shaped palatal strap is increased
a) Rigidity
b) Support
c) Stability
d) None of the above

5. Tissue stops in impression tray aids in
a) Anterior posterior stabilization
b) Better Acrylic flow
c) Proper Retention
d) All of the above

6. Major connectors of a maxillary RPD may be beaded to:
a) Produce a stronger frame work
b) Aid in retention of removable partial denture
c) Hold acrylic resin to the metal
d) Produce positive contact with the tissue

7. Function of major connector is that it:
a) Connects parts of prosthesis on one side of arch with those on opposite side
b) Distributes forces over entire supporting structure
c) Resists flexing and torque
d) All of the above

8. Lingual bar is used in conditions where:
a) Lingual sulcus is deep
b) Lingual sulcus is shallow
c) When splitting of adjacent teeth is require
d) When abutment teeth have poor bony support

9. Most common complaint of the patient with a thick-palatal bar in a RPD is:
a) Distortion under occlusal stress
b) Poor dissipation of force due to rigidity
c) Difficulty in pressing the food backward and swallowing
d) Loss of taste sensation

10. Posterior palatal bar is placed
a) On the soft tissue
b) Placed on the hard palate entirely
c) At the junction of hard and soft palate

11. Advantage of wide palatal bar over narrow bar is:
a) Less discomfort
b) Less bulk
c) More tough
d) More tissue coverage (area of basal seat)

12. The advantages of using a metal denture base are:
a) Increased rigidity with less bulk
b) Reduction of bulk in the palate
c) Better stimulation of the underlying tissue
d) All of the above

13. Advantage of palatal strap:
a) Increased rigidity with less bulk
b) Increased retention of appliance
c) Can be used in Kennedy class I partial dentures
d) More economical and comfortable to patient

14. The design for a maxillary cast RPD frame work with a double bar (anteriorly and posteriorly) type of major connector is indicated when:
a) Maximum palatal support is required
b) High vault type of palate
c) Acrylic plate for palate is to be used
d) Where a single palatal bar connector would flex

15. The lingual bar connector should be located at least how many millimeters below the gingival margin?
a) 2
b) 4
c) 6
d) 8

16. The advantage of metal base denture is:
a) Increase in tissue tolerance
b) Easy laboratory procedure
c) Rebasing and relining are quite easy
d) Increase in restorative cost

17. Ideal denture base material should not have
a) Sufficient strength
b) Dense and non-irritating surface
c) High specific gravity
d) Esthetically acceptable

18. For long span distal extension bases where rigidity is critical the major connector of choice is:
a) Palatal strap
b) Antero posterior palatal bar
c) Closed horse shoe
d) Horse shoe

19. Cross sectional from and dimension of lingual bar major connector is:
a) 4 gauge full pear shape
b) 6 gauge half pear shape
c) 6 gauge round shape
d) 4 gauge flat

20. Which one of the following should be relieved under a palatal major connector?
a) Rugae region
b) Posterior palatal seal
c) Soft flabby tissue
d) Torus palatinus

21. Most important part of RPD is:
a) Base
b) Connector
c) Reciprocal arm
d) Replaced tools

22. Indication for the use of a lingual plate are
a) For stabilizing periodontally weakened teeth and when there is need for addition of one or more anterior teeth. (important)
b) When the lingual frenum is high or the space available for a lingual bar is limited
c) In class 1 situations in which the residual ridge have undergone excessive vertical resorption
d) All of the above.

23. A major connector should cross the gingival margin diagonally. This statement is
a) True
b) False
c) Does not cross the midline
d) None of the above

24. Which of the following are indications for using an anteroposterior strap type of major connector
a) Class I and II arches with excellent abutment support
b) Long edentulous spans in class III
c) Inoperable palatal torus that does not extend posteriorly to the junction of the hard and soft palate
d) All of the above

25. Borders of major connectors adjacent to gingival crevices should be no closer to the crevices than
a) 1 – 2 mm
b) 2 – 3 mm
c) 3 – 6mm
d) 7 – 10mm

26. The anterior border of the palatal major connector should follow
a) The valleys between the rugae
b) The crests of prominent rugae
c) Both the crests and valleys
d) None of the above

27. In the anteroposterior bar major connector, the shape of the bars are
a) Anterior bar-flat strap; posterior bar-half oval
b) Anterior bar – half oval ; posterior bar – flat strap
c) Anterior bar – half pear shape; posterior bar – half pear shape
d) Anterior bar – flat strap; Posterior bar – flat strap

28. Which of the following statement about minor connector is false
a) It should exit from the major connector at right angle.
b) In class I maxillary arch, the minor connector must extend the entire length of the residual ridge
c) In Class I mandibular arch, it should extend 2/3rd the residual ridge.
d) None of the above

29. Rigidity of RPD frame work is highest with:
a) Wrought gold alloy
b) Cast gold alloy
c) Chrome cobalt alloy
d) Gold palladium alloy

30. Discoloration of a denture constructed from cold cure acrylic resin is due to:
a) Absorption of oral fluids
b) Pit changes in saliva
c) Leaching out of tertiary amines
d) Leaching out of excess monomer

31. When a large unoperable palatal torus is present, then the major connector of choice is?
a) Palatal strap
b) Antero-posterior palatal strap
c) Antero-posterior palatal bar
d) Complete palatal plate

32. Least preferred maxillary major connector is:
a) Single palatal strap
b) Anterior-posterior bar
c) Horse shoe shaped major connector
d) Complete palatal coverage

33. Compared to resin base the main disadvantage of a metallic denture base in distal extension situation is that, metal bases:
a) Are difficult to keep clean
b) Transfer thermal changes quickly to mucosa
c) Cannot be relined in event of ridge resorption
d) Are subjected to distortion and breakage

34. Minor connector for the mandibular distal extension base should extend:
a) Half the length of edentulous ridge
b) Two thirds the length of edentulous ridge
c) Full length of edentulous ridge
d) None of the above

35. Mandibular major connector used in Class 1 situation where residual ridges have undergone vertical resorption is:
a) Lingual bar
b) Lingual plate
c) Kennedy’s bar
c) Labial bar

36. The first step in major connector construction is:
a) Design of stress bearing area
b) Design of non stress bearing area
c) Making the outline of the strap line
d) Selection of the strap type

37. Lingual plate is indicated when:
a) There is need for addition of one or more Anterior teeth
b) Deep lingual sulcus
c) Good ridge support
d) Narrow lingual sulcus

38. Snow shoe effect indicates:
a) Broad coverage
b) Physiologic basing
c) Indirect retention
d) All of the above

39. The minor connector leaves the major connector:
a) gradually
b) abruptly
c) covering large area
d) without any relief

40. Lingual bar is:
a) Maxillary major connector
b) Direct retainer
c) Indirect retainer
d) None of the above

41. Which of following will happen with a flexible major connector:
a) It will make other components more effective
b) Will cause PDL destruction of abutment teeth
c) Cause ill-fitting of RPD
d) Will cause difficulty in occlusion

42. The only one flexible minor connector is
a) that connecting clasp assembly to major connector
b) that connecting indirect retainer assembly to the major connector
c) that joining the denture base to major connector
d) that approach arm of a bar type clasp

43. Lingual plating should be supported:
a) By the inclined surfaces of the mandibular incisors
b) With Bracing Arms
c) With the rests
d) With minor connector

44. Passive retention in removable partial dentures is provided by:
a) Direct retainers
b) Indirect retainers
c) Undercuts
d) Guiding planes

45. In future replacement of questionable mandibular teeth is anticipated, the major connector of choice is
a) Lingual bar
b) Sublingual bar
c) Lingual plate
d) Cingulum bar

46. The junction of mandibular minor connector with major connector is
a) Butt type joint
b) Acrylic forms the joint
c) Ball and socket joint
d) There is no joint

47. Major connector should be
a) Able to act as indirect retainer
b) Able to function as direct retainer
c) Rigid to connect bilateral components
d) Able to function as stress breakers

48. Relief under a maxillary major connector
a) Is generally not required
b) Is required
c) May be used
d) May not be used

49. Lingual plate is indicated in all, except
a) Periodontally weakened tooth
b) Anterior ridge resorption
c) High lingual frenum
d) Vestibule of more than 8 mm (AP-2011)

50. Maximum coverage to distribute forces over a wide area
a) Snows shoe effect
b) Bezold-Brucke effect
c) Realeff effect
d) Spectral curve

51. A minor connector contacting the axial surface of an abutment should not be located on a
a) Flat surface
b) Concavo-convex surface
c) Convex surface
d) Concave surface

52. The sublingual bar can be used for mandibular removable partial dentures where the height of the floor of the mouth in relation to the free gingival margins will be
a) Less than 6 mm
b) greater than 6 mm
c) Less than 8 mm
d) more than 8 mm

53. Which of the following is not a major maxillary metal partial denture frame work:
a) Lingual U plate
b) Palatal strap
c) Palatal plate
d) Single palatal plate

54. The superior border of lingual bar should lie
a) Deep in the lingual sulcus
b) At least 4 mm below the gingival margin
c) At the cingulum of anterior teeth
d) At least 7 mm below the gingival margin

55. Which part of the distal extension removable partial denture provides the greatest resistance to movement and torquing of the abutment teeth?
a) Rest
b) Base
c) Retentive clasp
d) Minor connector

56. Distance between maxillary major connector and tooth tissue junction is
a) 2 mm
b) 4 mm
c) 6 mm
d) 8 mm

57. Minor connector may be
a) of lattice work construction
b) of mesh construction
c) bead or nail head construction
d) All of the above

58. Kennedy bar is also known as?
a) Double lingual bar
b) Lingual plate
c) Lingual bar
d) Palatal plate