Eidgenössisches Examen Zahnmedizin Practice Questions - Eidgenössisches Examen Zahnmedizin Examen fédéral de médecine dentaire Esame federale di medicina dentaria Exam - Eidgenössisches Examen Zahnmedizin Practice Questions - Eidgenössisches Examen Zahnmedizin Examen fédéral de médecine dentaire Esame federale di medicina dentaria Exam

Question 1

A 22-year-old patient presents for a routine dental examination. Visual inspection of the occlusal surface of tooth 46 reveals a distinct whitish opacity in the pit and fissure area when wet, which becomes more pronounced and chalky upon air drying for 5 seconds. The enamel surface remains smooth and tactilely intact without surface micro-cavitation or underlying dark dentinal shadowing. According to the International Caries Detection and Assessment System (ICDAS), which code is assigned, and what is the primary management strategy?

ICDAS Code 1 (active initial lesion); non-operative management including biofilm removal, dietary counseling, and topical fluoride application ICDAS Code 3 (micro-cavitation); minimal invasive preventive resin restoration (PRR) with flowable composite ICDAS Code 2 (distinct visual change in enamel); operative excavation and placement of a single-surface composite restoration ICDAS Code 4 (underlying dentin shadow); direct access cavity preparation and restoration with glass ionomer cement

Correct Answer:

ICDAS Code 1 (active initial lesion); non-operative management including biofilm removal, dietary counseling, and topical fluoride application

Question 2

A 34-year-old patient presents with a deep occlusal carious lesion on tooth 36 extending into the inner third of the dentin on bitewing radiography. The tooth tests positive and normally to cold sensibility testing and is asymptomatic with no tenderness to percussion. Periapical radiography shows an intact lamina dura without periapical radiolucency. According to contemporary consensus on deep caries management (International Caries Consensus Collaboration / European consensus), what is the most appropriate carious tissue excavation protocol to preserve pulpal vitality?

Complete (non-selective) carious tissue excavation to hard, sound dentin throughout the entire cavity floor regardless of pulp proximity Selective carious tissue removal to soft dentin over the pulpal wall while establishing peripheral margins in hard, clean dentin, followed by immediate adhesive restoration Stepwise excavation leaving soft dentin, placing a temporary zinc oxide-eugenol cement, and performing mandatory re-entry after 6 months to remove remaining soft dentin Immediate prophylactic elective root canal therapy because radiographic depth in the inner dentinal third carries an unacceptable risk of pulpal failure

Correct Answer:

Selective carious tissue removal to soft dentin over the pulpal wall while establishing peripheral margins in hard, clean dentin, followed by immediate adhesive restoration

Question 3

When utilizing a modern 10-methacryloyloxydecyl dihydrogen phosphate (10-MDP)-containing universal adhesive on a cavity involving both aprismatic enamel margins and deep dentin, which application protocol provides optimal microtensile bond strength and marginal integrity?

Total self-etch mode without any phosphoric acid pre-treatment of enamel or dentin Full etch-and-rinse mode applying 37% phosphoric acid to both enamel and deep dentin for 30 seconds followed by air-drying until completely desiccated Selective enamel etching by applying 35–37% phosphoric acid exclusively to the enamel margins for 15 seconds, rinsing, followed by active application of the universal adhesive to both etched enamel and unetched dentin Self-etch application to enamel followed by separate phosphoric acid etching of the dentin floor only

Correct Answer:

Selective enamel etching by applying 35–37% phosphoric acid exclusively to the enamel margins for 15 seconds, rinsing, followed by active application of the universal adhesive to both etched enamel and unetched dentin

Question 4

A 28-year-old competitive swimmer presents with extensive cupping of the cusp tips and loss of surface anatomy on the palatal surfaces of the maxillary incisors and occlusal surfaces of first molars. The patient reports frequent consumption of isotonic sports drinks and lemon-infused water. What is the critical pH threshold below which dental enamel hydroxyapatite undergoes active chemical dissolution in the oral environment, compared to fluorapatite?

Hydroxyapatite dissolves below pH 6.8, whereas fluorapatite dissolves below pH 6.2 Hydroxyapatite dissolves below pH 6.0, whereas fluorapatite dissolves below pH 5.5 Hydroxyapatite dissolves below pH 4.0, whereas fluorapatite dissolves below pH 3.5 Hydroxyapatite dissolves below pH 5.5, whereas fluorapatite dissolves below pH 4.5

Correct Answer:

Hydroxyapatite dissolves below pH 5.5, whereas fluorapatite dissolves below pH 4.5

Question 5

During the direct restoration of a deep Class I occlusal cavity on a mandibular second molar, which cavity geometry factor (C-factor) calculation represents the highest polymerization contraction stress on adhesive cavity walls, and how is this stress minimized?

C-factor of 5 (5 bonded walls to 1 unbonded surface); minimized by using an incremental oblique layering technique or stress-relieving flowable base C-factor of 0.2 (1 bonded wall to 5 unbonded surfaces); minimized by bulk curing with high-intensity light in under 5 seconds factor of 1 (equal bonded and unbonded surfaces); minimized by using non-adhesive amalgam condensations C-factor of 2 (2 bonded walls to 1 unbonded surface); minimized by placing thick horizontal layers exceeding 4 mm

Correct Answer:

C-factor of 5 (5 bonded walls to 1 unbonded surface); minimized by using an incremental oblique layering technique or stress-relieving flowable base

Question 1

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Prepare with the Eidgenössisches Examen Zahnmedizin Practice Questions - Eidgenössisches Examen Zahnmedizin Examen fédéral de médecine dentaire Esame federale di medicina dentaria Exam practice quiz. This question bank includes 100 questions covering tooth, patient, year-old, root, and presents. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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Eidgenössisches Examen Zahnmedizin Practice Questions - Eidgenössisches Examen Zahnmedizin Examen fédéral de médecine dentaire Esame federale di medicina dentaria Exam

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Eidgenössisches Examen Zahnmedizin Practice Questions - Eidgenössisches Examen Zahnmedizin Examen fédéral de médecine dentaire Esame federale di medicina dentaria Exam

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