| Post Name | Assistant Professor in Conservative Dentistry |
|---|---|
| Department | Kerala Medical Education Services |
| Question Paper Code | 023/2026/OL |
| Category Code | 267/2025 |
| Date of Test | 11 February 2026 |
| Exam Type | Online Examination |
| Total Questions | 100 |
1
Match the following and choose the correct combination given below : Column-I Column-II (Name of muscles) (Name of nerves) (a) Palatoglossus (i) Hypoglossal nerve (b) Posterior belly of digastric (ii) Cranial root of accessory nerve (c) Masseter (iii) Mandibular nerve (d) Hyoglossus (iv) Facial nerve (v) Glossopharyngeal nerve
Answer
C. (a)-(ii), (b)-(iv), (c)-(iii), (d)-(i)
2
Choose the correct statements from the following : (i) Marginal ecto-mesenchymal condensation adjacent to enamel organ forms the dental lamina (ii) Hunter Schreger bands are formed due to change in direction of enamel rods (iii) Accentuated incremental lines of dentin are known as Contour lines of Von Ebner (iv) Cellular cementum is located at apical one third of root and the furcation areas of multirooted teeth
Answer
Question Cancelled
3
Which of the following statement is/are correct about pain pathway? (i) The pathway responsible for the discriminative aspect of pain is called the neospinothalamic tract. (ii) The synaptic transmitter secreted by aļ¬erent ļ¬bres subserving fast pain is glutamate. (iii) Paleospinothalamic tract includes synapses in the brain stem reticular formation.
Answer
C. All of the above (i), (ii) and (iii)
4
Which of the following statement is/are correct about the endocrine changes in pregnancy? (i) The human Chorionic Somatomammotropin (hCS) functions as a "maternal growth hormone of pregnancy". (ii) Low hCS (human Chorionic Somatomammotropin) levels are a sign of placental insuļ¬ciency. (iii) Human Chorionic Gonadotropin (hCG) is absolutely speciļ¬c for pregnancy.
Answer
B. Only (i) and (ii)
5
Hairy tongue mainly aļ¬ects
Answer
A. Filiform Papillae
6
Heterolactic fermentation produces
Answer
D. CO2 + Ethanol + Lactic acid
7
Functional inactivation (rather than death) of lymphocytes induced by encounter with antigens is termed as
Answer
B. Anergy
8
The ļ¬rst regional lymph node that receives lymph ļ¬ow from a primary tumour is called
Answer
A. Sentinel lymph node
9
A patient admitted for a dental procedure is administered lignocaine with adrenaline (1:80,000). Addition of adrenaline to lignocaine (i) Causes prolongation of duration of action of local anaesthetics (ii) Provides a more bloodless ļ¬eld for surgery (iii) Increases the chances of local tissue edema and necrosis (iv) Delays wound healing by reducing oxygen consumption in aļ¬ected area
Answer
Question Cancelled
10
A 33-year-old mother brings a child of 3 years with brownish discolorations and ill formed deciduous teeth with caries to the dental outpatient department. Use of which of the following drug is associated with the condition in the child?
Answer
B. Tetracycline
11
Several statements are given on eļ¬cacy trials in conduct of research. Identify the correct combination. 1. They assess the beneļ¬t of a drug in routine clinical setting. 2. Explains why treatments succeed and fail. 3. The primary focus is internal validity. 4. Analysis mostly uses an intention-to-treat approach.
Answer
B. 2, 3, 4
12
P value is an important measure in inferential statistics. Which statement is correct on p value?
Answer
A. Higher standard deviation leads to larger p values
13
Several statements on nature of disease and relationship to prevalence are given below. Which statement best describes the relation between the two.
Answer
C. Acute disease with fatal outcomes lowers prevalence
14
A confounder is
Answer
D. Associated with both the exposure and outcome
15
Several statements on case control studies are given below. Identify the correct combination. 1. Controls must be a representative sample of the population at risk for the disease 2. Potential for bias is high 3. They do not allow assessment of multiple risk factors for the same disease 4. Are suited for diseases with short latency.
Answer
C. 1, 2
16
Which statement is correct on Standard Error (SE)?
Answer
B. It is used in assessing the conļ¬dence interval
17
Which measure of central tendency is appropriate for skewed data?
Answer
B. Median
18
Chi squared test is to be applied for
Answer
C. Categorical data
19
Nonmaleļ¬cience in ethics refers to
Answer
A. Do no harm
20
The objective of a factorial design in randomized controlled trials is to
Answer
A. Test multiple interventions simultaneously
21
Which dental material has the lowest thermal conductivity?
Answer
B. Glass ionomer cement
22
Resilience of a material is deļ¬ned as
Answer
C. Energy absorbed within elastic limit
23
Which dental material is least irritating to pulp?
Answer
Question Cancelled
24
Which factor improves dentin bond strength?
Answer
D. Moist dentin surface
25
The main cause of pulpal irritation in composite resin is due to
Answer
C. Residual monomer
26
Which dental material is most susceptible to corrosion?
Answer
C. Dental amalgam
27
One important characteristics of MTA is
Answer
B. Excellent biocompatability
28
Which additive improves smoothness and handling characteristics of inlay wax?
Answer
C. Gum dammar
29
Addition silicon impressions can be
Answer
D. All of the above
30
Compared to gold alloys base metal alloys have
Answer
C. High modulus of elasticity
31
"Bioactive" restorative materials are primarily designed to
Answer
A. Release ļ¬uoride/minerals and promote apatite formation at the tooth interface
32
The gingival zenith of the maxillary central incisor is typically located
Answer
B. Slightly distal to the vertical midline of the tooth
33
The minimum facial enamel reduction recommended for porcelain laminate veneers in the cervical third is approximately
Answer
B. 0.3-0.4 mm
34
For a Class IV direct composite restoration, Sturdevant recommends beveling the enamel margins mainly to
Answer
C. Increase surface area for bonding and improve esthetic blending
35
The luting agent most commonly recommended for cementation of indirect composite inlays/onlays
Answer
C. Dual cure Composite cement
36
The primary indication for using a Non impregnated gingival retraction cord during restorative procedures is
Answer
B. Mechanically displace the gingival margin both apically and laterally
37
Restoration of abraded or eroded areas is indicated if
Answer
B. Intolerable sensitivity persists despite desensitizing agents
38
Degassing/Annealing of gold foil is performed to
Answer
B. Remove surface impurities and gases for cohesion
39
Elastomeric impressions in custom trays are most accurate with uniform material thickness of
Answer
B. 2-3 mm
40
Dual-arch impressions are best for indirect restorations on a single tooth with
Answer
B. Intact mutually protected Class I occlusion
41
Direct composite resin can be preheated to temperature upto
Answer
C. 68 Degree C
42
Which of the following cavity preparations has highest C factor?
Answer
A. Class 1
43
The acid used to etch porcelain veneers
Answer
D. Hydroļ¬uoric acid
44
Greater reversible gingival retraction is seen with
Answer
A. Gingival retraction cord
45
The advantages of automixing systems of rubber base impression materials include
Answer
D. All of the above
46
The gingival bevel in the Class 2 cast metal inlay preparation should result in metal margin which is
Answer
C. 30 degree
47
The depth of Class 1 cavity into dentin for Direct Filling Gold
Answer
B. 0.5 mm
48
Pure Zirconia has ________ crystal structure at room temperature.
Answer
A. Monoclinic
49
The preparation design for full veneer include
Answer
D. All of the above
50
The restorative material of choice for non carious cervical lesion with extensive periodontal involvement is
Answer
A. Dual cure Resin Modiļ¬ed GIC
51
Which wavelength of laser is most eļ¬ective for removing carious dentin while preserving healthy tooth structure?
Answer
C. 2940 nm (Er:YAG Laser)
52
In intra oral digital imaging, which of the following correctly describes the relationship between pixel size and spatial distribution?
Answer
B. Smaller pixel size generally leads to higher spatial resolution
53
Which laser tissue interaction mechanism occurs when extremely high power densities cause ionoization of tissue and plasma formation?
Answer
D. Photoplasmolysis
54
Compared to rotary instrumentation, laser assisted carries removal is generally associatedwith
Answer
C. Longer working time and reduced pain
55
During long-time follow-up of internally bleached non-vital teeth, relapse of discoloration is observed despite adequate cervical sealing and correct bleaching protocol. Which microscopic mechanism most plausibly explains this phenomenon?
Answer
C. Incomplete cleavage of high-molecular-weight chromophores located within peritubular dentin
56
Which statement represents a fundamental misconception about Minimum Invasive Dentistry?
Answer
D. MID discourages operative intervention in cavitated lesions
57
What is the advantage of capturing clinical dental photographs in RAW format instead of JPEG for advanced shade analysis?
Answer
C. Retention of complete sensor data and linear tonal response
58
Which color space is most widely used in digital shade matching research due to its perceptual uniformity and reproducibility?
Answer
C. CIELAB
59
Which biological parameter most reliably diļ¬erentiates dentin hypersensitivity from early reversible pulpitis in a clinically intact tooth?
Answer
D. Level of neuropeptide (CGRP, Substance P) expression in pulpal tissue
60
Which desensitizing agent demonstrates both tubule occlusion and nerve desensitization, thereby oļ¬ering dual-mechanism control of dentinal hypersensitivity?
Answer
Question Cancelled
61
The cells responsible for bone resorption in periapical lesions are activated by
Answer
C. RANKL
62
Radicular cyst arises from
Answer
C. Rests of malassez
63
The most commonly isolated microorganism in failed root canal treatment is
Answer
C. Enterococcus faecalis
64
Gram negative anaerobes in periapical lesions mainly cause tissue damage by
Answer
B. Lipopolysaccharides
65
Which microorganism is most resistant to calcium hydroxide?
Answer
B. Candida albicans
66
The primary nutritional source for bacteria in necrotic pulp is
Answer
C. Proteins and Peptides
67
The most important factor in deciding endodontic treatment in
Answer
B. Strategic value of tooth
68
Which tooth has the poorest prognosis for endodontic treatment?
Answer
C. Maxillary molar with furcation involvement
69
Referred pain in endodontics occurs due to
Answer
B. Shared nerve pathways
70
Bioļ¬lm formation in the root canal increases bacterial resistance primarily due to
Answer
A. Reduced metabolic activity of bacteria
71
The temperature range employed in Glass bead (hot salt) sterilizers is between
Answer
B. 425 degree F and 475 degree F
72
The most important aspect of emergency treatment for an acute alveolar abscess is
Answer
D. Establish drainage
73
The head diameter of a No. 4 Peeso Reamer is
Answer
B. 1.3 mm
74
Which of the following intracanal irrigating solution was known as Dakin's solution used for the irrigation of wound during World War I?
Answer
A. Buļ¬ered 0.5% solution of NaOCl
75
A NiTi Rotary endodontic ļ¬le which has a special phase transformation into 'R' phase of nickel-titanium is
Answer
A. Twisted ļ¬le
76
Ledermix paste, an intracanal medicament contains one of the following antibiotics which is
Answer
C. Demeclocycline
77
Which of the following laws of access opening states that ________ the walls of the pulp chamber are always concentric to the external surface of the tooth at the level of the CEJ?
Answer
B. Law of concentricity
78
Root ZX Electronic Apex Locator determines the working length of root canal by simultaneously measuring the impedances of two diļ¬erent frequency wave forms which are
Answer
C. 0.4 KHz and 8 KHz
79
The mechanical objectives of shaping and cleaning of root canal system as suggested by "Schilder" are all of the following except
Answer
D. Removal of all tissue and debris from the root canal space
80
The nickel-titanium (NiTi) rotary ļ¬les used with reciprocation movements belongs to
Answer
C. Fourth generation NiTi ļ¬les
81
Regarding warm vertical compaction of gutta percha, which of the following statements are true? (i) Heating gutta-percha reduces viscosity and increases ļ¬ow under compaction pressure (ii) Excessive heat can alter the crystalline phase of gutta percha (iii) Apical extrusion may occur even with an intact apical constriction (iv) Warm vertical compaction eliminates for the need of sealer (v) Vertical compaction produces a higher gutta percha to sealer ratio
Answer
D. (i), (ii), (iii) and (v)
82
Which hemostatic agent used in endodontic surgery is most likely to delay bone healing if left in the surgical site?
Answer
B. Ferric sulfate
83
The earliest cellular event responsible for successful periapical wound healing following endodontic surgery is
Answer
Question Cancelled
84
A deep isolated periodontal pocket on the mesial surface of a molar extends to the apex, with a non-vital pulp. The most likely primary lesion is
Answer
B. Primary endodontic with secondary periodontal involvement
85
The laser with the greatest depth of penetration into dentinal tubules, contributing to superior antibacterial action, is
Answer
C. Nd:YAG
86
The most critical endodontic factor determining success of a post and core retained crown is
Answer
C. Presence of ferrule
87
Compared with periapical radiography, CBCT detects periapical lesions earlier maintly because CBCT.
Answer
D. Detects cancellous bone changes before cortical bone involvement
88
The single most important factor aļ¬ecting prognosis of a true combined endo-perio lesion is
Answer
C. Remaining periodontal attachment level
89
Calcium hydroxide is recommended following severe luxation injuries mainly because it
Answer
C. Inhibits osteoclastic activity
90
A 7-year-old child presents with intrusive luxation of a permanent incisor with open apex. The best management is
Answer
C. Allow spontaneous re-eruption
91
The nerve Fibers remain constant with the aging of dental pulp
Answer
Question Cancelled
92
Which tooth shows maximum incident of ļ¬le separation during cleaning and shaping of root canal?
Answer
D. Mandibular Molars
93
Endodontic Instruments fracture during root canal preparation occurs as a result of
Answer
A. Cyclic fatigue or Torsional fatigue or Both
94
In Endodontic microsurgery which one is the most appropriate bevel while root end resection
Answer
C. from the long axis of the root
95
Most important factor for a successful Vital Pulp Therapy
Answer
A. Aseptic ļ¬eld and Good Coronal Seal
96
A patient presented with symptomatic irreversible pulpitis with apical periodontitis in tooth no. 26. A successful root canal treatment was performed on this tooth. During a follow-up visit after 6 months, the dentist observed that apical pathosis was still present; however, the tooth was functional and asymptomatic. According to AAE guidelines, this tooth is categorized as
Answer
B. Healing
97
Which material having maximum bio activity?
Answer
B. MTA
98
Why is Vital Pulp Therapy using Calcium Hydroxide no longer recommended?
Answer
C. It forms a porous dentinal bridge with tunnel defects permitting bacterial microleakage
99
Steiglitz forceps used for
Answer
B. Removal of fractured instruments from the root canal
100
Ideal root-end preparation in endodontic microsurgery should be
Answer
C. 3 mm deep, centered on the canal, using ultrasonic tips
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