100+ Free Algeria Dental Residency Contest Practice Questions

Prepare for the Concours d'Accès au Résidanat en Médecine Dentaire (Algeria) exam with instant access — no signup required.

✓ No registration✓ No credit card✓ No hidden fees✓ Start practicing immediately

100+ Questions

100% Free

Loading practice questions...

Same family resources

Explore More Algerian Medical, Dental & Pharmaceutical Residency Examinations (Concours de Résidanat)

Continue into nearby exams from the same family. Each card keeps practice questions, study guides, flashcards, videos, and articles in one place.

Algeria — Concours de Résidanat en Médecine (Algeria)

Practice Questions100 questions

Algeria — Concours de Résidanat en Pharmacie (Algeria)

Practice Questions100 questions

2026 Statistics

Key Facts: Algeria Dental Residency Contest Exam

100 questions

Single written dental residency entrance paper

Official internal competition regulations, Oran 1

3 hours duration

Standard examination sitting duration for the national dental residency contest

Official competition notices (Session Octobre)

10.00/20 threshold

Minimum qualifying average score required to enter the residency post selection ranking

Arrêté ministériel régissant le concours de résidanat

700 DZD in Oran 2026

Session-specific registration fee; other organizing faculties may differ

Oran 1 official October 2026 contest notice

3 sitting limit

Maximum allowable attempts per candidate under statutory postgraduate training rules

MESRS postgraduate medical education regulations

A free 100-question English MCQ practice bank for Algeria's Concours d'Accès au Résidanat en Médecine Dentaire. It covers endodontics, prosthodontics, periodontology, oral surgery, and orthodontics based on the national DEMS dental residency syllabus.

Sample Algeria Dental Residency Contest Practice Questions

Try these sample questions to test your Algeria Dental Residency Contest exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Which zone of a carious dentin lesion is soft, heavily infected, and has irreversibly denatured collagen that cannot be remineralized?

A.Infected dentin (soft, necrotic outer carious dentin)

B.Affected dentin (inner demineralized, uninfected dentin)

C.Translucent (sclerotic) dentin zone

D.Tertiary reactionary dentin zone

Explanation: The traditional histologic model distinguishes outer infected dentin, with irreversibly denatured collagen and heavy bacterial contamination, from inner affected dentin, whose collagen scaffold can remain remineralizable. Modern excavation is lesion- and site-specific: firm peripheral margins are important for sealing, while selective removal near the pulp may leave soft or leathery dentin to avoid exposure in a deep lesion.

2What is the primary histological and biochemical purpose of conditioning enamel with 35% to 37% phosphoric acid prior to applying resin composite adhesives?

A.Selectively dissolving hydroxyapatite crystals to create micro-porosities for resin tag micromechanical retention

B.Completely dissolving the collagen network within the dentin matrix

C.Sterilizing the cavity floor to eliminate anaerobic pulp bacteria

D.Forming a covalent chemical bond between calcium phosphate and composite monomers

Explanation: Acid etching of enamel with 35-37% phosphoric acid selectively dissolves prism cores or prism peripheries, creating high-energy micro-porosities (depth of 10-30 micrometers). Fluid resin bonding agents penetrate these micro-irregularities by capillary action, polymerizing to form micromechanical resin tags.

3In contemporary adhesive systems, what defines the 'hybrid layer' originally described by Nakabayashi?

A.The micromechanical interdiffusion zone formed by resin monomers polymerizing within demineralized dentin collagen fibrils

B.The chemical bond between glass ionomer polyacrylic acid and hydroxyapatite

C.The layer of residual cutting debris compacted into dentinal tubules (smear plug)

D.The interface formed between the glass filler particles and silane coupling agent

Explanation: The hybrid layer (zone d'hybridation) is formed when adhesive hydrophilic monomers (e.g., HEMA, Bis-GMA) infiltrate the exposed collagen fibril meshwork produced by acid demineralization of dentin and polymerize in situ, creating a molecular-level mechanical interlocking between tooth structure and restorative resin.

4Which clinical presentation is most consistent with symptomatic irreversible pulpitis (pulpite irréversible symptomatique)?

A.Sharp, lingering, radiating pain induced by thermal stimuli that persists long after removal of the stimulus, often occurring spontaneously

B.Brief, transient sharp pain provoked by cold or sweet food that ceases immediately within 1-2 seconds of stimulus removal

C.Complete absence of response to cold, heat, and electric pulp testing with periapical bone radiolucency

D.Severe dull throbbing pain elicited exclusively during mechanical mastication without thermal sensitivity

Explanation: Symptomatic irreversible pulpitis is characterized by persistent, lingering pain that outlasts the thermal stimulus by several seconds or minutes. Pain may be spontaneous, radiating, exacerbated when lying flat, and unprovoked by external stimuli, indicating advanced, unresolvable pulp inflammation requiring pulpectomy or root canal treatment.

5Which endodontic irrigating solution is uniquely capable of simultaneously dissolving both vital and necrotic organic pulp tissue while providing potent broad-spectrum antimicrobial activity?

A.Sodium hypochlorite (NaOCl)

B.17% Ethylenediaminetetraacetic acid (EDTA)

C.0.2% Chlorhexidine gluconate solution

D.Physiological saline (0.9% NaCl)

Explanation: Sodium hypochlorite is the principal endodontic irrigant because it combines broad antimicrobial action with dissolution of vital and necrotic organic tissue. Clinically used concentrations vary; concentration, volume, contact time, activation, and safe delivery all affect efficacy and toxicity.

6What is the primary pharmacological and mechanical indication for using 17% EDTA solution as an endodontic irrigant following biomechanical preparation with sodium hypochlorite?

A.Chelating calcium ions to remove the inorganic component of the endodontic smear layer and open dentinal tubules

B.Coagulating remaining pulpal hemorrhage in the apical third

C.Neutralizing sodium hypochlorite to prevent chemical apical extrusion

D.Staining root canal calcifications to locate hidden second mesiobuccal (MB2) canals

Explanation: 17% EDTA (ethylenediaminetetraacetic acid) is a polyamino carboxylic acid that chelates divalent calcium ions (Ca2+) from dentin. It removes the inorganic smear layer produced by rotary instrumentation, unclogging dentinal tubule orifices to facilitate sealer penetration and disinfection.

7Anatomically, what is the 'apical constriction' (minor apical diameter) in endodontics, and why is it considered the ideal apical termination landmark for canal preparation and obturation?

A.The narrowest portion of the root canal lumen where pulp tissue transitions into the periodontal ligament, located 0.5 to 1.0 mm coronal to the major apical foramen

B.The anatomical root apex visible on periapical radiographs

C.The widest portion of the apical foramen where cementum invaginates into the canal

D.The junction between coronal pulp chamber and radicular canal orifice

Explanation: The apical constriction (foramen minor) is the narrowest diameter of the root canal system, located typically 0.5 to 1.0 mm coronal to the anatomical apex/major foramen. Terminating instrumentation and obturation at this physiological junction limits mechanical trauma to periapical tissues and provides a natural barrier for gutta-percha compaction.

8Which permanent tooth most commonly has a second mesiobuccal canal (MB2) located palatal to the main mesiobuccal canal orifice?

A.Maxillary first molar

B.Mandibular first molar

C.Maxillary first premolar

D.Mandibular canine

Explanation: The permanent maxillary first molar commonly has a second canal in its mesiobuccal root. Reported prevalence varies with population and detection method, but clinicians should actively inspect the developmental groove palatal to MB1 because an untreated canal can contribute to persistent apical disease.

9What is the primary clinical disadvantage and mechanism of failure when using calcium hydroxide (Ca(OH)2) paste as an intracanal medicament for periods exceeding 3 to 6 months?

A.Significant reduction in root dentin flexural strength predisposing the tooth to vertical root fractures

B.Severe chemical discoloration of the clinical crown turning it dark gray

C.Formation of diffuse pulp stones throughout adjacent vital teeth

D.Immediate osteoclastic bone resorption around the periapical tissues

Explanation: Long-term exposure of radicular dentin to highly alkaline calcium hydroxide (pH ~12.5) causes structural degradation of the organic collagenous dentin matrix. Studies confirm that after 3 to 6 months, root dentin exhibits significantly decreased fracture resistance and flexural strength, dramatically increasing the risk of cervical and vertical root fractures.

10During root canal instrumentation of a severely curved mesial canal of a mandibular molar, a practitioner encounters sudden loss of working length and an obstruction that cannot be negotiated. A ledge has been created. What is the correct protocol to bypass the ledge?

A.Place a distinct 1 to 2 mm pre-bend at the tip of a small stainless steel hand file (size #08 or #10), lubricate with EDTA, and probe gently while rotating toward the opposite wall

B.Force a larger nickel-titanium rotary file at maximum torque into the canal to drill through the ledge

C.Obturate the canal immediately at the shortened length without attempting negotiation

D.Inject concentrated sulfuric acid into the canal to dissolve the dentin obstruction

Explanation: To bypass an artificial shelf or ledge, a fine, flexible stainless steel hand file (ISO #08 or #10) must be pre-curved at its apical 1-2 mm. Using abundant lubricant (EDTA), the file is gently teased past the ledge by feeling for the original canal catch, followed by small-amplitude rasping strokes to smooth the ledge.

About the Algeria Dental Residency Contest Exam

The Concours d'Accès au Résidanat en Médecine Dentaire is Algeria's national competitive postgraduate entrance examination for dental doctors seeking specialization (Diplôme d'Études Médicales Spéciales — DEMS in orthodontics, oral surgery, periodontology, prosthodontics, etc.). Administered annually across dental faculties, it tests foundational sciences, dental pathology, and surgical restorative care. This English 100-question practice bank is an educational study adaptation designed for self-assessment.

Assessment

One written 100-question paper. No separate oral, practical, assignment, or case-study component is specified in the published entrance-contest rules. Study coverage follows the national dental curriculum, including Odontologie Conservatrice & Endodontie, Prothèse & Occlusodontie, Chirurgie Buccale, Parodontologie, and Orthopédie Dento-Faciale & Pédodontie.

Time Limit

3 hours

Passing Score

Minimum general average of 10.00/20 required for validation; hospital training posts for DEMS specialization are attributed strictly by merit ranking within available quotas.

Exam Fee

Varies by faculty/session; 700 DZD for Oran 1's October 2026 session (Facultés de Médecine Dentaire d'Algérie under the tutelage of the Ministère de l'Enseignement Supérieur et de la Recherche Scientifique (MESRS))