This is the NTR university MDS entrance previous question paper:

1. In a disease free tempromandibular joint, posterior end of the articular disc remains at:

1. 0 O' clock position.
2. 10 O' clock position.
3. 12- 12 O' clock position.
4. 2 O' clock position.

2. Which of the following teeth has maximum sensory receptors?

1. Maxillary permanent 1st molar.
2. Mandibular permanent 1st molar.
3. Mandibular permanent canine.
4. Maxillary permanent canine.

3. In a healthy gingival, the distance between gingival margin and free gingival groove is:

1. 0.1-0.5 mm.
2. 0.5-1 mm.
3. 0.5-1.5 mm.
4. 1 mm-2 mm.

4. Which of the following structures in not present on the internal surface of mandible?

1. Genial tubercle.
2. Mylohyoid ridge.
3. Lingula.
4. Mental foramen.

Ans: 4

5. Among all of the following formens in the base of skull which is the most posteriorty present:

1. Foramen spinosum.
2. Foramen rotundum.
3. Foramen Lacerum.
4. Foramen Ovale.

Ans: 1

6. Enamel etched by a tooth conditioner but not covered with a fissure sealant will:

1. Remineralize within a month.
2. Remineralize within 3 months.
3. Absorb stain and discolor the tooth.
4. Leave the tooth more susceptible to caries attack.

7. The strength of dental investment for gold alloy is dependent on the amount of:

1. Silica

2. Carbon
3. Copper
4. Gypsum

Ans: 4

8. In Erythema migrans, which papilla of tongua are absent:

1. Fungiform.
2. Foliate.
3. Filliform.
4. Circumvallate.
Ans: 3

9. Thistle-tube appearance of pulp chamber is a feature of:

1. Coronal dentin dysplasia.
2. Regional odontodysplasia.
3. Dentigenesis imperfecta.
4. Amelogenesis imperfecta.
Ans: 1

10. On clinical examination a 60 years old feamale had a turnor in the right Buccalmucosa. The size of the tumor was about 1 cm in diameter.There was no involvement of regional lymph nodes and also has no distant metastasis. The TNM stag of the tumor is:

1. T1 No Mo.
2. T1 N1 Mo.
3. T1 N2 Mo.
4. T2 No Mo.

Ans: 4

11. Which of the following is not a feature of torus mandibularies?

1. Common in Mongoloids.
2. Present on the lingual surface of mandible below the Mylohyoid line.
3. Usually Bilateral.
4. May of may not associatd with torus palatinus.
Ans: 2

12. The time gap between appearance of Koplik's spot and cutaneous rash in measles is:

1. 24 Hrs.
2. 3-4 days.
3. 2 weeks.
4. 10 Days.
Ans: 2

13. The drug that causes intrinsic staining of teeth due to calcium

chelation is:

1. Alizarin
2. Ampicillin.
3. Tetracycline.
4. Erythromycin.

Ans: 3

14. Which of the following medications shortens the recovery period of

pricary herpetic gingivostomatitis?

1. Acyclovir.
2. Ziduvidine.
3. Kenalog in orabase.
4. All of the above.
Ans: 1

15. The occurrence of dental caries in a population at a given point of time may be termed as:

1. Incidence.
2. Point Prevalence.
3. Period Prevalence.
4. None of the above.
Ans: 1

16. The CPITN probe has a ball end of which diameter & marking at what level:

1. 0.5 mm diameter ball and marking at 3,5,8 and 11 mm.
2. 1.0 mm diameter ball and marking at 3.5, 5.5, 8.5 and 11 mm.
3. 0.5 mm diameter ball and marking at 3.5, 5.5, 8.5 and 11 mm
4. 1.0 mm diameter ball and marking at 3,5,8 and 11 mm.
Ans: 3

17. The WHo index for fluorisis is based on:

1. Dean's index
2. Mckay's index
3. Community Fluorosis index
4. Public Health fluorosis index

18. While planning for a clinical trial for finding out the effect of a particular mouthwash on human subjects, which kind of study design will be able to give best results:

1. Randomized controlled trial with double blind planning.
2. Clinical trial with single blind plan and crossover
3. Randomized controlled trial with no blinding and cross-over.
4. Randomized controlled trial with double blind plan and cross-over.

19. DMFT index is a:

1. Simple reversible index.
2. Cumulative irreversible index
3. Cumulative reversible index
4. Simple irreversible index
Ans: 2

20. Recommended average daily intake of fluoride from all sources

combined for adults and children is:

1. 2.o to 2.2 mg & 1.2 mg.
2. 1.2 to 2.0 mg & 1.2 mg.
3. 2.2 to 2.4 mg & 1.5 mg.
4. 2.6 to 2.8 mg & 1.4 mg.