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153207 Dental

A male 25 years old presents to the dental clinic with black spot .He also gives the history of previous dental treatments of other teeth as well . Intraoral examination reveals pit and fissure caries with 17. The alignment of the rotary instrument shank axis in this patient should be:

AParallel with the long axis of the tooth crown
BPerpendicular to the long axis of the tooth crown
CParallel to the transverse axis of the tooth crown
DPerpendicular to the transverse axis of the tooth crown
Dental
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