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Free Practice Questions for Mongolia Dentist Licensing Exam

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Key Facts: Mongolia Dentist Licensing Exam Exam

100 items

Items per candidate, drawn at random from the HDC bank

Health Development Center candidate guide and sample tests

100 minutes

Time allowed for the computer-based test

Health Development Center hr.hdc.gov.mn candidate guide

70 points

Minimum score that gives the right to a licence

Order A/295, Annex 1, §3.8

12,000 MNT

Examination fee per sitting in 2026

Health Development Center 2026 registration notice

70% / 15% / 5% / 10%

Dentistry, public health, law and ethics split for new dentist graduates

Order A/295, Annex 1, §3.4.2

6 credits

CPD credits (багц цаг) a dentist must earn each year

Order A/295, Annex 1, §4.1

Mongolia's dentist licensing examination is run by the Health Development Center on hr.hdc.gov.mn. HDC materials describe 100 randomly drawn items in 100 minutes; a score of 70 gives the right to a licence. Order A/295 weights the items 70% dentistry, 15% public health, 5% law and 10% ethics. The exam is in Mongolian; this free bank is an independent English-language MCQ study adaptation.

Sample Mongolia Dentist Licensing Exam Practice Questions

Try these sample questions to review concepts for the Mongolia Dentist Licensing Exam exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1A 32-year-old patient presents with sharp dental pain in the lower right first molar when drinking iced water. The pain subsides within 2 to 3 seconds after the cold stimulus is removed. Electric pulp testing elicits a responsive reading comparable to contralateral control teeth, and periapical radiographs reveal occlusal enamel-dentin radiolucency without periapical changes. What is the most accurate pulpal diagnosis?
A.Symptomatic irreversible pulpitis
B.Reversible pulpitis
C.Asymptomatic irreversible pulpitis
D.Pulp necrosis
Explanation: Reversible pulpitis is characterized by sharp, transient pain provoked by thermal or osmotic stimuli that completely resolves within a few seconds after stimulus withdrawal. The absence of lingering pain and lack of spontaneous discomfort indicate that pulpal inflammation is confined and capable of returning to health once the etiology (such as caries or defective restoration) is eliminated. Conservative restorative therapy without pulpectomy is indicated.
2During root canal instrumentation of a maxillary central incisor, the clinician aims to remove the inorganic smear layer produced during mechanical preparation prior to final obturation. Which irrigant is standardly used for this purpose?
A.2.5% Sodium hypochlorite (NaOCl)
B.0.2% Chlorhexidine gluconate
C.17% Ethylenediaminetetraacetic acid (EDTA)
D.3% Hydrogen peroxide (H2O2)
Explanation: 17% EDTA is a chelating agent that binds calcium ions, demineralizing and dissolving the inorganic component of the endodontic smear layer. Applying 17% EDTA for 1 minute followed by a final rinse of NaOCl opens dentinal tubules, allowing better sealer penetration and adaptation of obturation materials. Prolonged exposure beyond 1 to 2 minutes should be avoided to prevent excessive dentinal erosion.
3In adhesive restorative dentistry, what histological entity is formed by the micromechanical interdiffusion and polymerization of resin monomers within the acid-demineralized collagen mesh of coronal dentin?
A.The hybrid layer (hybrid zone)
B.Smear layer plug
C.Tertiary reactionary dentin
D.Aprismatic enamel boundary
Explanation: The hybrid layer (or hybrid zone) is formed when hydrophilic adhesive resin monomers infiltrate the exposed collagen fibril scaffold created by acid etching of dentin, polymerizing in situ to create a micromechanical bond between restorative resin and dentin. First described by Nakabayashi in 1982, its structural integrity is critical for bond durability, retention, and preventing microleakage.
4According to G.V. Black's classification of dental caries and cavity preparations, which class designates a carious lesion located on the proximal surface of a premolar or molar?
A.Class I
B.Class II
C.Class III
D.Class IV
Explanation: Class II cavities in G.V. Black's classification involve the proximal surfaces (mesial or distal) of posterior teeth (premolars and molars). These lesions typically begin just gingival to the interproximal contact area and often involve the occlusal surface during clinical preparation to establish access and retention.
5An 8-year-old child presents with a non-vital maxillary central incisor following trauma 6 months ago. Radiographs confirm an immature tooth with divergent root walls, thin dentinal walls, and an open blunderbuss apex. Which biologically based treatment modality is currently preferred to promote continued root maturation and thickening of the dentinal walls?
A.Traditional long-term calcium hydroxide apexification
B.Immediate root canal obturation with warm gutta-percha
C.Surgical periapical curettage and retrograde amalgam filling
D.Regenerative endodontic procedure (revascularization)
Explanation: Regenerative endodontic procedures (revascularization) disinfect the canal, induce a blood clot scaffold from the periapical tissues (a source of stem cells from the apical papilla), and seal the access coronally with a hydraulic calcium silicate such as MTA. In immature necrotic permanent teeth they can allow continued root lengthening and thickening of the dentinal walls, which apexification does not achieve.
6During endodontic irrigation with 3% sodium hypochlorite using a non-vented needle, the patient experiences sudden excruciating pain, immediate diffuse facial swelling, and rapid ecchymosis of the overlying skin. What is the immediate and most critical in-chair clinical management step?
A.Inject additional local anesthetic containing 1:50,000 epinephrine into the apex to cause vasoconstriction
B.Trephine the cortical bone surgically to establish external decompression
C.Stop irrigation immediately, gently aspirate, irrigate copiously with sterile saline, and administer analgesics and cold compresses
D.Immediately place an intracanal calcium hydroxide paste and seal with temporary cement
Explanation: A sodium hypochlorite extrusion accident requires immediate cessation of irrigation, gentle aspiration through the canal, and copious flushing with sterile physiological saline to dilute the irritant. Initial management includes local anesthesia for pain control, cold compresses during the first 24 hours to reduce swelling and hemorrhage, transitioning to warm compresses after 24 hours, prescribing analgesics, and considering prophylactic antibiotics and oral corticosteroids. Patients must be reassured and closely monitored.
7In operative resin composite restorations, the cavity configuration factor (C-factor) is defined as the ratio of bonded to unbonded restoration surfaces. Which cavity preparation represents the highest C-factor and therefore experiences the greatest polymerization shrinkage stress?
A.Class I occlusal cavity (C-factor about 5: five bonded walls, one free surface)
B.Class II mesio-occluso-distal (MOD) cavity (C-factor about 1)
C.Class IV incisal fracture restoration (C-factor well below 1)
D.Direct resin veneer on a flat labial surface (one bonded surface, C-factor well below 1)
Explanation: The configuration factor is the ratio of bonded to unbonded (free) composite surfaces. A box-shaped Class I occlusal cavity has five bonded walls (mesial, distal, facial, lingual and pulpal) and one free occlusal surface, giving a C-factor of about 5. Few free surfaces leave little room for the resin to flow as it shrinks, so shrinkage stress, marginal gaps, enamel micro-cracks and post-operative sensitivity are greatest in such cavities.
8A 40-year-old patient presents for evaluation of a pink discoloration near the cervical margin of tooth #21. Radiographs demonstrate an irregular radiolucency in the cervical third of the root where the root canal outline appears intact and visible through the radiolucency. Thermal pulp testing of tooth #21 gives a normal, vital response. What is the most probable diagnosis?
A.Internal inflammatory root resorption
B.External cervical resorption (invasive cervical resorption)
C.Internal replacement resorption
D.Cervical root caries
Explanation: External cervical resorption (ECR) initiates below the epithelial attachment in the cervical root area, often presenting with a 'pink tooth' appearance as vascular resorptive tissue shows through coronal enamel. Key radiographic features include an intact root canal wall visible through the radiolucency, irregular borders, and a normal pulpal vitality response in early-to-mid stages because the pulp remains protected by an unmineralized pericanal resorption-resistant sheet (PRRS).
9Which bacterial species is most frequently isolated from root canals of previously endodontically treated teeth exhibiting persistent, secondary apical periodontitis, owing to its ability to survive starvation, high alkalinity, and penetrate deeply into dentinal tubules?
A.Porphyromonas endodontalis
B.Fusobacterium nucleatum
C.Streptococcus mutans
D.Enterococcus faecalis
Explanation: Enterococcus faecalis is a facultative anaerobic Gram-positive coccus strongly associated with persistent or secondary endodontic infections and failed root canal treatments. It possesses virulence mechanisms including a proton pump that confers resistance to high pH (such as that of calcium hydroxide), biofilm formation capacity, gelatinase production, and the ability to invade dentinal tubules and survive prolonged starvation periods.
10What is the primary mechanism of adhesion between conventional glass ionomer cements (GIC) and tooth mineral (enamel and dentin)?
A.Mechanical retention via macro-undercuts and dovetails
B.Micromechanical interlocking into phosphoric acid-etched microporosities
C.Chemical chelation between carboxyl groups of polyacrylic acid and calcium ions in hydroxyapatite
D.Covalent cross-linking between bis-GMA and type I collagen fibrils
Explanation: Conventional glass ionomer cements adhere directly and chemically to tooth structures through an ionic exchange process. The carboxylate groups (-COO-) of polyacrylic acid chelate with calcium ions (Ca2+) exposed on the hydroxyapatite crystals of both enamel and dentin, forming a durable, ion-enriched interfacial exchange layer without requiring separate micro-retentive etching.

About the Mongolia Dentist Licensing Exam Exam

The Dentist Licensing Examination is the Health Development Center test that dentistry graduates must pass to obtain a treatment (эмчлэх) licence to practise dentistry in Mongolia. Under Minister of Health Order A/295 it covers dentistry, public health, health law and ethics. This free bank offers independent English-language MCQ practice on those topic areas.

Exam sponsor: Health Development Center (HDC / Эрүүл мэндийн хөгжлийн төв), Ministry of Health of Mongolia; licences are granted by decision of the Minister of Health. The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Assessment

The licensing examination (мэргэжлийн үйл ажиллагаа эрхлэх зөвшөөрлийн шалгалт) is taken on the Health Development Center's hr.hdc.gov.mn system. Under Order A/295, Annex 1, §3.4.2, items for new dentist graduates are 70% dentistry, 15% public health, 5% health-sector law and 10% medical-professional and medical ethics. Each candidate receives a random selection of items (§3.5); HDC materials describe 100 items in 100 minutes, and a score of 70 or more gives the right to a licence (§3.8). The official test is in Mongolian and uses five-option single-answer, multiple-answer and cause-and-effect items, which may include images, audio or video. This practice bank is an independent English-language MCQ study adaptation by OpenExamPrep, not an official translation or a simulation of the examination.

Time Limit

100 minutes

Passing Score

70 points or more (Order A/295, Annex 1, §3.8)

Exam / Certification Fees

12,000 MNT examination fee, plus 5,000 MNT stamp duty after passing

Exam sponsor website

Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.

Official sources

Our practice resources: topics covered

We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.

70%

Dentistry

Restorative dentistry and endodontics, oral and maxillofacial surgery, prosthodontics, periodontics, pediatric dentistry and orthodontics, dental materials and local anesthesia.

15%

Public health

Oral epidemiology (DMF-T, CPI), fluorides and sealants, infection prevention and control, sterilization, waste management and occupational exposure.

5%

Health-sector law

Licensing under Article 25 of the Law on Health, CPD rules in Order A/295, revocation grounds, and the Law on Medicines and Medical Devices.

10%

Medical-professional and medical ethics

Informed consent and refusal, confidentiality, candor about complications, fee-splitting and patients' right to information.

Preparing for the Mongolia Dentist Licensing Exam Exam

What You Need to Know

  • Passing score: 70 points or more (Order A/295, Annex 1, §3.8)
  • Assessment: The licensing examination (мэргэжлийн үйл ажиллагаа эрхлэх зөвшөөрлийн шалгалт) is taken on the Health Development Center's hr.hdc.gov.mn system. Under Order A/295, Annex 1, §3.4.2, items for new dentist graduates are 70% dentistry, 15% public health, 5% health-sector law and 10% medical-professional and medical ethics. Each candidate receives a random selection of items (§3.5); HDC materials describe 100 items in 100 minutes, and a score of 70 or more gives the right to a licence (§3.8). The official test is in Mongolian and uses five-option single-answer, multiple-answer and cause-and-effect items, which may include images, audio or video. This practice bank is an independent English-language MCQ study adaptation by OpenExamPrep, not an official translation or a simulation of the examination.
  • Time limit: 100 minutes
  • Exam / certification fees: 12,000 MNT examination fee, plus 5,000 MNT stamp duty after passing Official sources

Using Our Practice Resources

  • Work through all 100 available questions
  • Review every answer and explanation
  • Track weak areas and revisit them
  • Use our AI tutor for tough concepts

Mongolia Dentist Licensing Exam: Suggested Study Strategy

1Dentistry is 70% of the test: cover endodontic diagnosis and irrigation, dental materials, oral surgery and local anesthesia, prosthodontics, periodontal staging and pediatric dentistry.
2Public health is 15%: review caries indices (DMF-T, CPI), fluoride, sealants, sterilization and spore testing, and bloodborne-pathogen exposure management.
3Learn the Health Law licensing rules (Articles 25 and 43) and the CPD rules in Order A/295.
4Use the Health Development Center's free sample tests (жишиг сорил) to see the Mongolian item styles.
5Practise timed 100-question sets at about one minute per item.

Frequently Asked Questions

What is the Mongolia Dentist Licensing Exam?

It is the licensing examination that dentistry graduates take to obtain a treatment (эмчлэх) licence. Article 25.1 of the Law on Health allows only licensed medical professionals to provide care, and Minister of Health Order A/295 sets out how the Health Development Center organizes the examination.

How is the examination structured, timed and scored?

It is a computer-based test on the hr.hdc.gov.mn system. Each candidate receives items drawn at random from the Health Development Center bank; HDC materials describe 100 items in 100 minutes. The score appears immediately, and 70 points or more gives the right to a licence (Order A/295, Annex 1, §3.8).

What topics does the examination cover?

Order A/295, Annex 1, §3.4.2 weights the items for new dentist graduates: 70% dentistry, 15% public health, 5% health-sector law and 10% medical-professional and medical ethics.

How do I register, and what does it cost?

Registration is online at hr.hdc.gov.mn during the windows announced by the Health Development Center (quarterly in 2026). The examination fee is 12,000 MNT. After passing, you submit a licence request and pay a 5,000 MNT stamp duty within 10 working days; otherwise the result lapses (Order A/295, Annex 1, §§3.10-3.11).

How long is the licence valid, and how is it kept?

Under Article 25.3 of the Law on Health (as amended on 3 July 2026) the treatment licence is issued for 5 years. Dentists must earn 6 CPD credits each year, at least two-thirds of them in dentistry; when they do, the licence is extended for 5 years (Art. 25.5; Order A/295, Annex 1, §§4.1-4.4). Those who miss the credits must sit the licensing examination (§4.13).

Is this practice bank an official exam, past paper or translation?

No. The official examination is written in Mongolian and uses five-option computer-based items. This bank is an independent English-language MCQ study adaptation by OpenExamPrep; it is not an official translation, an HDC item bank, or a simulation of the examination software.