Endodontic Failure in Maxillary First Molar

# Most  common cause of endodontic failures in maxillary first molar is:
A. Missed fourth canal
B. Vertical root fracture
C. Periodontal involvement of pulpal lesion
D. None of the above

The correct answer is A. Missed fourth canal.

- It's a standard to mention now that's maxillary first molar has fourth canal, the MB2 in 54% of cases.

- The mandibular first molar is the tooth which needs RCT most commonly, but it's the maxillary first molar which has the most number of failed RCT.

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Pulp Polyp

# A pulp polyp is usually found in:
A. Young teeth with chronic open pulpitis
B. Young teeth with apical abscess
C. Young teeth with acute pulpitis
D. Young teeth with periapical infection

Pulp polyp is a chronic hyperplastic open pulpitis found most commonly in deciduous molars and permanent first molar. It is highly vascularized. Complete endodontic treatment is to be provided if root formation is completed. 

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Radiopaque agent in dental composites

# What is added to increase radiopacity in composites?
A. Aluminium oxide
B. Ferric chloride
C. Boron oxide
D. Calcium sulphate

The correct answer is A. Aluminium Oxide.

Filler composition in composites are often modified with other ions to produce desirable changes in properties.
Barium, zinc, boron, zirconium, yttrium ions have been used to produce radiopacity in the filler particles.

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Highest incidence of pulp necrosis

# Highest incidence of pulp necrosis is associated with?
A. Class V Preparation on root surface
B. Inlay preparation
C. Partial veneer preparation
D. Full crown preparation

The correct answer is D. Full crown preparation.

The most intense level of frictional heat is generated with a large diamond stone when teth are prepared for a full crown. 

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