NEET MDS 2021 Question Paper(Available) : Download Solution PDF with Answer Key

Question 1:

Arrange the following zones of the pulp from outer to inner layer in the correct sequence:

• (1) Odontoblastic zone
• (2) Cell rich zone
• (3) Cell free zone
• (4) Central pulp

All of the following are the uses of EDTA, except:

• (1) Dissolution of pulp
• (2) Softening of dentin
• (3) Removal of smear layer
• (4) Chelation of calcium ions

Which of the following can be used as a base under CaOH2 when the remaining dentin thickness is less than 1 mm?

• (1) ZnOE
• (2) Resin modified GIC
• (3) Polycarboxylate
• (4) ZnPO4

Dentin bonding agent is:

• (1) Hydrophilic
• (2) Hydrophobic
• (3) Hydrophilic and hydrophobic
• (4) Lipophilic and lipophobic

Law of symmetry is not followed by:

• (1) Maxillary molars
• (2) Mandibular molars
• (3) Maxillary premolars
• (4) Mandibular premolars

Which of the following is used to enlarge canal opening?

• (1) K-file
• (2) Reamer
• (3) Gates Glidden drill
• (4) Path finder

Strength of gypsum bonded investment material is provided by:

• (1) Carbon Copper
• (2) Silica
• (3) Gypsum

All of the following statements regarding self cure as compared to heat cure are true, except:

• (1) Self cure has lower molecular weight
• (2) Self cure has higher residual monomer content
• (3) Self cure is more porous
• (4) Self cure has more transverse strength

During bleaching, light emitted from LED lamp is:

• (1) Cold blue visible light 465 nm
• (2) Hot blue visible light 465 nm
• (3) Cold orange visible light 465 nm
• (4) Cold green visible light 465 nm

The process of making the impression material to conduct electricity is:

• (1) Metallizing
• (2) Electroplating
• (3) Iontophoresis
• (4) Galvanizing

As the intensity increases, hue perception changes. The effect is called:

• (1) Metamerism
• (2) Bezold-Brucke effect
• (3) Chameleon effect
• (4) Tyndall effect

Knives used in gingivectomy are:

• (1) Merrifield and Orban
• (2) Merrifield and Kirkland
• (3) Kirkland and Orban
• (4) #1 and #2

Which of the following statements is incorrect for furcation defect?

• (1) Grade 3 defect is clinically visible
• (2) Grade 1 can be visible radiographically as radiopaque
• (3) In Grade 4 inter-radicular bone is completely lost
• (4) In Grade 2 bone is attached to the dome of the furcation

Cheese-like material composed of food particles, desquamated epithelial cells, leukocytes, and microbes, which can be easily displaced with water spray, is known as:

• (1) Materia alba
• (2) Pellicle
• (3) Calculus
• (4) Acquired plaque

Which of the following is not found in the root?

• (1) Enamel
• (2) Dentin
• (3) Cementum
• (4) Pulp

Serum lipase levels are increased in:

• (1) Acute pancreatitis
• (2) Diabetes mellitus
• (3) Myocardial infarction
• (4) Obstructive jaundice

The plaque found in heavy calculus former differs from that in non-calculus former in that it has:

• (1) Low calcium
• (2) Low potassium
• (3) Low phosphorus
• (4) Mineral content is same

The dentist tries to prepare wax try-in using base plate wax in a tropical area, the type of wax preferred is:

• (1) Type I base plate wax
• (2) Type II base plate wax
• (3) Type III base plate wax
• (4) Type IV base plate wax

Drug of choice in acute necrotizing ulcerative gingivitis is:

• (1) Metronidazole
• (2) Clindamycin
• (3) Tetracycline
• (4) Ceftriaxone

Which vitamin deficiency is seen in chronic alcoholics?

• (1) Vitamin B1
• (2) Thiamine
• (3) Riboflavin
• (4) Vitamin A

The 18:8 stainless steel is composed of:

• (1) 18-Chromium, 8-Nickel
• (2) 18-Cobalt, 8-Chromium
• (3) 18-Cobalt, 8-Nickel
• (4) 18-Nickel, 8-Chromium

Titanium welding is done using:

• (1) Argon
• (2) Laser assisted
• (3) Spot welding
• (4) Thermal welding

Following tooth preparation, which chemicals are suitable for gingival retraction before making the impression?

• (1) Acidic
• (2) Basic
• (3) Neutral
• (4) Highly basic

Which density of bone is best suited to achieve a minimum difference in elastic modulus of titanium implant and the residual alveolar bone?

• (1) D1
• (2) D2
• (3) D3
• (4) D4

A 4-year-old child living in an area with water fluoride content of 0.5ppm, should be given supplemental fluoride tablet of:

• (1) 0.15 mg/day
• (2) 0 mg/day
• (3) 5 mg/day
• (4) 0.25 mg/day

A country is taking precautions for a disease which has not yet occurred. Which of the following level of prevention is most relevant?

• (1) Primordial Prevention
• (2) Primary Prevention
• (3) Secondary Prevention
• (4) Tertiary Prevention

Di-S score is 0.6, CI-S score is 0.7. What is the interpretation for OHI-S from this data?

• (1) Good
• (2) Excellent
• (3) Fair
• (4) Poor

Patient with temporary restorations on four fractured anterior teeth, 6 teeth with chalky and rough spots, and two 3 molars extracted due to pericoronitis. What is the DMFT score according to WHO Modified DMFT Index 1987?

• (1) 6
• (2) 0
• (3) 10
• (4) 12

Which phase of clinical trial is used to include large population to check the effectiveness, dosage, and safety of drugs?

• (1) Phase 2
• (2) Phase 4
• (3) Phase 3
• (4) Phase 5

Which of the following fluoride preparation combines with hydroxyapatite crystals to form calcium fluoride, which further diffuses to form fluorapatite crystals?

• (1) Stannous fluoride
• (2) Sodium fluoride
• (3) Amine fluoride
• (4) APF