MCQs

I-The innervations of dental pulp does not include the following except:

1. High density of proprioceptors
2. Myelinated C fibers
3. Myelinated A fibers
4. Plexus of Raschkow

II-Cracked tooth has the highest incidence in:

1. Maxillary 1^st molar
2. Maxillary 2^nd molar
3. Mandibular 1^st molar
4. Mandibular 2^nd molar

III. Gutta Percha points are composed of:

1. 20% GP + 66% filler + 11% radiopacifier + 3% plasticizer
2. 66% GP + 20% filler + 11% radiopacifier + 3% plasticizer
3. 50% GP + 36% filler + 11% radiopacifier + 3% plasticizer
4. 36% GP + 50% filler + 11% radiopacifier + 3% plasticizer

 IV. In root-filled teeth with persisting periapical lesion and require re-treatment, the predominant bacteria are:

1. Gram-positive
2. Gram-negative
3. Obligate anaerobes
4. None of the above

 V. All of the following can be used for canal obstruction removal except:

1. Ultrasonics
2. MAP system
3. Massarran kit
4. Gonon kit

Key answers: 3, 4, 1,1, 2