Operative+dentistry+mcqs+pdf+new May 2026

4. According to the ICDAS (International Caries Detection and Assessment System) , an initial enamel lesion (code 2) is best managed by: A) Surgical excavation and composite restoration B) Non-invasive treatment (fluoride, sealant, resin infiltration) C) Conventional GIC restoration D) Indirect pulp capping

Answer: B
Explanation: ICDAS code 2 = white or brown spot lesion with intact surface (non-cavitated). Non-invasive or micro-invasive (resin infiltration) is indicated.

5. The Hall Technique (preformed metal crowns over carious primary molars without caries removal or LA) relies on: A) Complete caries removal prior to crown cementation B) Sealing the caries from the oral environment C) Antibiotic properties of the crown material D) High fluoride release from the cement

Answer: B
Explanation: The Hall Technique works by sealing carious dentin, starving bacteria of substrate. No caries removal, no LA, no tooth preparation is done.

6. Which bioactive material is specifically indicated for partial caries removal (selective removal to firm dentin) in deep lesions? A) Zinc phosphate cement B) Biodentine™ C) Amalgam D) Polymethyl methacrylate (PMMA) operative+dentistry+mcqs+pdf+new

Answer: B
Explanation: Biodentine (tricalcium silicate-based) has bioactivity, induces tertiary dentin, and is used for deep lesions after selective caries removal to avoid pulp exposure.

Q: A third-generation polywave LED curing light emits which additional wavelength to activate alternative photoinitiators (e.g., Lucirin TPO)?
A) 385 nm
B) 420 nm
C) 470 nm
D) 520 nm

Answer: A) 385 nm
Explanation: Polywave LEDs include a violet (~385 nm) peak for TPO, improving cure depth in bulk-fill composites.

Q: The cutting edge of a hatchet excavator makes an angle with the shaft of: A) 45 degrees B) 90 degrees C) 60-70 degrees D) 100 degrees Answer: D) 100 degrees (Explanation: This is a classic question from Sturdevant. The cutting edge is at an angle of 100 degrees to the shaft (resembling a single-bevel hatchet).) Q: A third-generation polywave LED curing light emits

18. The primary function of a matrix band in Class II restoration is to: A. Provide retention for the amalgam. B. Contour the proximal surface and prevent material overhang. C. Protect the gingiva. D. Increase the hardness of the restoration. Answer: B

19. Which anatomical feature is most commonly preserved to prevent "food impaction" in Class II restorations? A. Marginal Ridge. B. Oblique Ridge. C. Transverse Ridge. D. Cusp of Carabelli. Answer: A

20. Microleakage is best defined as: A. Leakage of fluids and bacteria between the cavity wall and the restorative material. B. Leakage through the body of the restoration. C. Leakage due to fracture of the tooth. D. Leakage of dentinal tubules fluid. Answer: A

Q: Which property allows a bulk-fill composite to be placed in 4 mm increments without increasing shrinkage stress?
A) Higher filler load (>80% wt)
B) Addition of thiol-ene monomers
C) Reduced polymerization rate via modified camphorquinone
D) Increased radio-opacity with ytterbium trifluoride Q: Which property allows a bulk-fill composite to

Answer: C) Reduced polymerization rate via modified camphorquinone (or alternative initiators)
Explanation: Slower polymerization allows stress relaxation; true "low-stress" bulk-fills use novel thiol-ene or alternative initiator systems.

Are you preparing for BDS exams, PGMEE, or NEET MDS? If Operative Dentistry is your stumbling block, you’ve come to the right place.

Operative Dentistry is the backbone of clinical dentistry. From cavity preparation to bonding protocols, the subject is vast and detail-oriented. To help you streamline your preparation, we have curated a new collection of Operative Dentistry MCQs available for PDF download.

This guide covers high-yield questions, standard textbooks references (like Sturdevant and Summitt), and previous year questions to give you an edge.

Search for "Operative dentistry MCQ compendium" or "Self-assessment in conservative dentistry." Some authors provide their question banks as supplementary files.