MCQs in Prosthodontics

Chapter 3: Complete Denture

 

  

 

1- A possible way to improve mastication in a complete denture patient is by:

  1. Unilateral muscle effort.
  2. Bilateral muscle effort.
  3. Tongue position.
  4. All of the above.
  5. None of the above.

 

 

 

 

The answer is: B

 

2- In a complete denture patient, the ratio of the average reduction in height of residual ridge in the anterior region of mandible and maxilla is about:

  1. 4:2
  2. 2:4
  3. 4:1
  4. 1:4
  5. 2:2

 

 

 

 

 

The answer is: C

 

3- In which of the following cases, the centric relation, and the centric occlusion coincide:

  1. Complete denture.
  2. Upper partial denture opposing lower natural dentition.
  3. Single complete denture opposing natural teeth.
  4. Both A and C
  5. All of the above

 

 

 

 

 

The answer is: D

 

 4- Which of the following act as a dislodging force on a denture:

  1. Force of adhesion.
  2. Atmospheric pressure.
  3. The adhesiveness of food.
  4. Interfacial surface tension.
  5. None of the above.

 

 

 

 

 

The answer is: C

 

5- Which of the following act as a retentive force for a complete denture:

  1. Forces created with opening the jaw.
  2. Functional and parafunctional movements.
  3. Force of adhesion.
  4. Forces of gravity.
  5. None of the above.

 

 

 

 

 

The answer is: C

 

6- For adhesion to work as an aid in the retention of a complete denture which of the following is necessary:

  1. Air
  2. Saliva
  3. Vacuum
  4. All of the above.
  5. None of the above.

 

 

 

 

 

The answer is: B

 

7- One of the contra indications for denture adhesive is:

  1. Dissatisfaction of the patient with well made denture.
  2. Patients with xerostomia.
  3. Ill-fitting denture.
  4. Partially or wholly paralyzed oral mucosa.
  5. None of the above.

 

 

 

 

 

The answer is: C

 

8- To fabricate a stable complete denture, the artificial teeth should be arranged on:

  1. The rapidly sloping surfaces.
  2. The neutral zone.
  3. Anywhere between the cheek and tongue.
  4. All of the above.
  5. None of the above.

 

 

 

 

 

The answer is: B

 

9- The unfavourable area for a complete denture support is:

  1. Buccal shelf area.
  2. Sharp spiny ridges.
  3. Fibrous tuberosities.
  4. Both B and C
  5. All of the above.

 

 

 

 

 

The answer is: D

 

10- Which of the following provides stable support for a complete denture:

  1. Anterior ridge.
  2. Premolar and molar area.
  3. Incisal area.
  4. Retromolar area.
  5. They are all the same.

 

 

 

 

 

The answer is: B

 

11- For better support to the complete denture, the area of occlusal table of artificial teeth must be:

  1. More than that of natural dentition.
  2. Equal than that of natural dentition.
  3. Less than that of natural dentition.
  4. All of the above.
  5. None of the above.

 

 

 

 

 

The answer is: C

 

12- Combination syndrome is a dental condition that results from:

  1. The inadequate vertical dimension of occlusion.
  2. Occlusal discrepancies.
  3. Wearing of lower distal extension partial denture opposing upper complete denture.
  4. Wearing of upper distal extension partial denture opposing lower natural dentition.
  5. None of the above.

 

 

 

 

 

 

The answer is: C

 

 13- Which of the following is true about upper and lower anterior teeth in complete denture construction. The upper and lower anterior teeth:

  1. Should be in contact in centric occlusion.
  2. Should not be in contact in centric occlusion.
  3. Should not overlap each other.
  4. Have an open bite relation.
  5. None of the above.

 

 

 

 

 

The answer is: B

 

14- A 50-years old edentulous patient comes to your clinic asking for a complete denture. On clinical examination you notice a small palatal torus. What would be your treatment of choice:

  1. Surgical removal of torus before fabricating the denture.
  2. Adequate relief in the complete denture over the torus.
  3. Denture is made regardless of the torus.
  4. Complete denture is not suitable for this patient.
  5. None of the above.

 

 

 

 

 

The answer is: B

 

15- The resistance to removal of a denture in a direction opposite to that insertion is called as:

  1. Stability
  2. Support
  3. Retention
  4. Relining
  5. None of the above.

 

 

 

 

 

The answer is: C

 

 16- The force of attraction between like molecules is called as :

  1. Adhesion
  2. Cohesion
  3. Coherence
  4. All of the above.
  5. None of the above.

 

 

 

 

 

 

The answer is: B

 

17- The most vulnerable part of alveolar ridge to time-dependant occlusal stresses is/are:

  1. Posterior mandibular alveolar ridge.
  2. Anterior maxillary alveolar ridge.
  3. Anterior mandibular alveolar ridge.
  4. Both A and B.
  5. Both B and C.

 

 

 

 

 

The answer is: C

 

18- Which of the following is best for overdentures abutments:

  1. Incisor
  2. Canine
  3. Premolar
  4. Molar
  5. They are all the same.

 

 

 

 

 

The answer is: B

 

19- Which of the followings does not cause gingival irritation around abutment tooth of tooth supported overdenture:

  1. Movement of denture base.
  2. Poor oral hygiene.
  3. Excess space in the prosthesis around the gingival margins of abutment tooth.
  4. Both A and C.
  5. None of the above.

 

 

 

 

 

The answer is: E

 

20- The most common cause of loss of abutment teeth in case of overdenture is:

  1. Caries
  2. Periodontal disease.
  3. Endodontic complications.
  4. Accidents and trauma.
  5. None of the above.

 

 

 

 

 

The answer is: B

 

21- How much time is needed before wearing an immediate denture just after the extraction:

  1. 12 hours.
  2. 24 hours.
  3. 12 days.
  4. 24 days.
  5. None of the above.

 

 

 

 

 

The answer is: C

 

22- After how many days of extraction can the immediate denture be removed at night:

  1. One day.
  2. Three days.
  3. Five days.
  4. Seven days.
  5. None of the above.

 

 

 

 

 

The answer is: D

 

23- How much bone loss does the patient have during the first 12 months extraction:

  1. 5% - 10%.
  2. 10% - 20%.
  3. 20% - 30%.
  4. 30% - 35%.
  5. None of the above.

 

 

 

 

 

The answer is: C

 

24- How much time is needed for the extraction socket to complete its calcification:

  1. 6 months.
  2. 6 to 8 months.
  3. 8 to 12 months.
  4. 12 to 15 months.
  5. None of the above.

 

 

 

 

 

The answer is: C

 

 25- Which of the following statements is/are wrong:

  1. Tooth loss is earlier in the maxilla than mandible.
  2. In some patients, mandibular canines are retained four times longer than other teeth.
  3. Both of the above.
  4. None of the above.

 

 

 

 

 

The answer is: D

 

26- Which of the following can be considered a disadvantage in relation to the edentulous mandible:

  1. The amount of denture border adjacent to movable mucosa.
  2. Limited quality of mucosa.
  3. Both of the above.
  4. None of the above.

 

 

 

 

 

The answer is: C

 

27- Which of the following cases is most likely to cause a fracture of a denture opposing natural teeth:

  1. Heavy anterior occlusal contact.
  2. Deep labial frenal notches.
  3. High occlusal forces due to strong mandibular elevator musculature.
  4. All of the above.
  5. None of the above.

 

 

 

 

 

The answer is: D

 

28- The procedure in which you add a small amount of denture material to the denture base to compensate for the changes that occur in the basal seat without adversely affecting the occlusal relationship and esthetics is called as:

  1. Rebasing
  2. Relining
  3. Relief
  4. Reduction
  5. None of the above.

 

 

 

 

 

The answer is: B

 

29- By adding more tissue conditioner, the strength of the processed resin will:

  1. Remain the same.
  2. Increase
  3. Decrease
  4. Any of the above.
  5. None of the above.

 

 

 

 

 

The answer is: C

 

30- The elastic stage of the tissue conditioner is reached in:

  1. 1 to 2 hours.
  2. 1 to 2 days.
  3. 1 to 2 weeks.
  4. 1 to 2 months.
  5. None of the above.

 

 

 

 

 

The answer is: C

 

31- The forward shifting of mandibular denture base from excessive loading from posterior occlusion results in tissue ulceration in:

  1. Posterior lingual flange.
  2. Posterior buccal flange.
  3. Anterior buccal flange.
  4. Anterior lingial flange.
  5. None of the above.

 

 

 

 

 

The answer is: D

 

32- Learning to chew satisfactorily with new dentures usually requires at least:

  1. 6 to 8 hours.
  2. 6 to 8 weeks.
  3. 6 to 8 months.
  4. 6 to 8 years.
  5. None of the above.

 

 

 

 

 

The answer is: B

 

33- Which of the following should not be used to correct occlusal errors:

  1. Rubber wheels.
  2. Acetate stripes.
  3. Articulating paper.
  4. Carvorumdum paste.
  5. All of the above.

 

 

 

 

 

The answer is: D

 

34- How much thickness of the denture base is desirable over the retromolar pad and maxillary tuberosity to avoid interference:

  1. 5 mm.
  2. 5 mm.
  3. 5 mm.
  4. 5 mm.
  5. Any of the above.

 

 

 

 

The answer is: A

 

35- If the occlusal plane is too low anteriorly or too high posteriorly, the maxillary  denture will:

  1. Slide anteriorly.
  2. Slide posteriorly.
  3. Slide laterally.
  4. Remain stable.
  5. None of the above.

 

 

 

 

 

The answer is: A

 

36- Setting of posterior teeth on residual ridge incline as it ascends towards retromolar pad will result in:

  1. Stability of denture.
  2. Anterior displacement of denture.
  3. Posterior displacement of denture.
  4. Balanced occlusion.
  5. None of the above.

 

 

 

 

 

The answer is: B

 

  37- There are many landmarks in the oral cavity which helps in designing complete dentures. One of the important landmarks is fovea palatini. What is its relation to the vibrating line:

  1. Behind the vibrating line
  2. In front of the vibrating line
  3. On the vibrating line
  4. Has no relation to vibrating line
  5. sometimes this landmark does not exist

 

 

 

 

 

The answer is: B

 

38- A patient presents for the provision of complete dentures. Examination reveals an unfavorable ridge slope. What is the most likely reason:

  1. He is a recent extraction case
  2. He has been edentulous for a long time
  3. He has had posterior teeth removed much before the anterior teeth
  4. Unfavorable ridges are never seen
  5. A submerged tooth may be present

 

 

 

 

 

The answer is: A

 

39- How will the alveolar ridge respond to a mandibular complete denture base that terminates short of retromolar pad:

  1. Marked ridge resorption will occur
  2. The apposition of bone on the ridge will occur
  3. The alveolar ridge will not be affected at all
  4. Soreness of the soft tissue
  5. Fracture of the ridge may occur

 

 

 

 

 

The answer is: A

 

40- The primary denture support area for a mandibular complete denture is:

  1. The vestibule
  2. The buccal shelf
  3. The palatopharyngeal fold
  4. The franulum
  5. All of the above

 

 

 

 

 

The answer is: B

 

41- A complete denture wearer, reports complaining of discomfort with his dentures. On examination it is observed that the posterior teeth are set edge to edge, without horizontal overjet, the possible discomfort may be:

  1. Gagging
  2. Cheek biting
  3. Reduced taste
  4. Speech aberrations
  5. Lip biting

 

 

 

 

 

The answer is: B

 

42- After the provision of complete denture the first review appointment for evaluating the new dentures should be carried out after:

  1. 3 hours after delivery
  2. 12 hours after delivery
  3. 24 hours after delivery
  4. 36 hours after delivery
  5. 48 hours after delivery

 

 

 

 

 

The answer is: C

 

 43- Patients with complete dentures are advised to chew food on both sides of the mouth, but with food of tougher consistency, the patient preference for chewing changes and use:

  1. Molar region for chewing
  2. Premolar region for chewing
  3. It makes no difference since chewing tough foods is not possible with a complete denture
  4. Anterior region for chewing
  5. The patient avoids tough food

 

 

 

 

 

The answer is: B

 

44- A patient with class iii mobility of upper and lower teeth is suggested immediate complete dentures. When both maxillary and mandibular immediate complete dentures are proposed then what is the recommended protocol:

  1. They should be constructed together
  2. Make the maxillary first followed by the mandibular
  3. Construct the mandibular first
  4. Immediate dentures should not be made routinely as they get loose later
  5. Wait for complete healing of the tissues

 

 

 

 

 

The answer is: A

 

45- A patient is observed with complete loss of teeth in the maxillary arch and loss of the molars on both sides on the lower arch. What is the treatment option for such a clinical scenario?

  1. Only the maxillary denture should be made
  2. It is absolutely essential to make the lower denture along with the upper
  3. It makes no difference whether the lower denture is made or not
  4. In such a situation the lower teeth should also be extracted
  5. Review the patient

 

 

 

 

 

 The answer is: B