Operative dentistry BCQs

By | May 21, 2015

Q no 1: following are risk factors for root caries except

  1. Exposure of root surface
  2. Physical impairment
  3. Cognitive impairment
  4. Female gender
  5. Low educational level

Answer (d)


Q no 2: first step in treatment protocol for patients at risk of root caries

  1. Implement preventive measures
  2. Eliminate active infection
  3. Evaluate salivary flow rate
  4. Examine at 3 month recall
  5. Perform bacterial testing

Answer ( b)

Q no 3: tactile exploration should be done carefully because root surface is

  1. Softer than enamel
  2. Harder than enamel
  3. Softer than dentin
  4. Harder than cementum

Answer (a )

Q no 4: radiographs can be useful in identifying early proximal root lesion, but can occasionally be prone to misinterpretation because of

  1. Significant loss of attachment
  2. Cervical ‘ burn out’
  3. Obvious cavitation
  4. Radiolucency of pulp chamber
  5. Less degree of mineral loss

Answer ( b)

 Q no 5: Amalcore, or coronal- radicular restoration  is

  1. Post placement than restoration with amalgam
  2. Pulp chamber and coronal 2 mm to 3 mm of each canal are used for retention of the build up material
  3. All canals are filled with adhesive restoration
  4. Retention of core material with amalgam pins
  5. Adhesively retain complex amalgam without axillary retention

Answer ( b)

Q no 6: when multiple post and core restoration are planned in the same arch

  1. The laboratory fabricated custom cast post is the most time and cost efficient method
  2. Passive tapered post best fulfill this criterion
  3. Passive parallel post provide favorable stress distribution
  4. Active post is best
  5. Carbon fiber- reinforce post

Answer (a)

Q no7: retention triad for post consists of

  1. Post length, cement and post style
  2. Post diameter, canal preparation, post length
  3. Ante-rotation, crown bevel, post style
  4. Remaining vertical tooth structure, post length
  5. High fracture toughness, luting agent, post fitting

Answer (a )

Surgical Endodontics MCQs

Question no 1: the objective of incision and drainage are

  1. To evacuate exudates and purulence from a soft tissue swelling
  2. Incision for drainage increases discomfort
  3. Drainage through the soft tissue accomplished most effectively when swelling is firm and non- fluctuant
  4. Incision for drainage is always made horizontally into the swelling
  5. Incision of drainage speeds up healing process

Question 2: Peri apical surgery is indicated

  1. When there is persistent peri apical infection that cannot be resolved with non- surgical root canal re- treatment
  2. When there is true cyst
  3. Severe periodontal disease
  4. Irretrievable posts and root fillings and there removal would result in further damage to the root structure
  5. Unidentified cause of conventional root canal failure

Question 3: root end resection

  1. It removes the untreated apical portion of root
  2. It provides angled surface to prepare a root and cavity preparation
  3. It should be perpendicular to long axis of tooth
  4. It expose additional canals, apical deltas, or fractures
  5. It should be around 5 mm because most of additional canals are present in apical 5mm

Question 4: indication for root amputation or hemisection

  1. Preservation of strategically important roots and its accompanying crown
  2. Root fusion or proximity
  3. Untreatable roots with broken instruments, perforations, caries, resorption and calcified canals
  4. Severe periodontal disease
  5. Inability to complete root canal treatment on either half.

Question no 5: root end cavity preparation

  1. Are now made with ultrasonic tips
  2. Preparation should be class one type in the apical portion of canal
  3. It should have a minimum depth of 3mm
  4. It should have a minimum depth of 5 mm
  5. The walls of the preparation will be slightly oblique with long axis of the root

Question 6: Thirty year old patients presented to you with chief complain of chewing. Radiographic examination reveals furcation caries and bone loss that has compromised the distal root. Which surgical procedure will be indicated for management?

  1. Bicuspidization
  2. Hemisection
  3. Apical surgery
  4. After root canal treatment, crown will be divided through the furcation
  5. Root amputation




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