B.The canal is wet C.There is no sinus tract. D.There is no foul odor. E.The temporary filling is intact 37 Which one is not the pathways of pulpal and periapical infections? A.Dentinal tubules B.Pulp exposure C. Gingival D.Periodontal ligament E.Anachoresis 38 Tug-back is achieved and the canal is ready for filling A. When the gutta-percha has extended beyond the apex B.When the gutta-percha is easily removed from the root canal C.When the gutta-percha placed to apical constriction exhibits resistance on removal D.After cementation E.None ofabove 39 Most root canal infections involve A.a single obligate anaerobic species B.multiple anaerobic species only C.mixed aerobic and anaerobic microorganisms D.multiple aerobic species only E.none ofabove 40 An abnormally shaped tooth that may appear as an extra wide crown,a normal crown with an extra root,or other combinations resulting from the union of two adjacent tooth germs by dentin during development is called A.fused teeth B.concresence of teeth C.geminated teeth D.dilacerations of tooth E.taurodontism 41 Which isn't the non-operative treatment of dental caries in the following? A.application of fluoride B.application of APF gel C.remineralizative therapy D.enameloplasty E.pit and fissure sealing 42 Which is not the aim of operative therapy on the dental caries management?B. The canal is wet. C. There is no sinus tract. D. There is no foul odor. E. The temporary filling is intact 37 Which one is not the pathways of pulpal and periapical infections? A. Dentinal tubules B. Pulp exposure C. Gingival D. Periodontal ligament E. Anachoresis 38 Tug-back is achieved and the canal is ready for filling A. When the gutta-percha has extended beyond the apex B. When the gutta-percha is easily removed from the root canal C. When the gutta-percha placed to apical constriction exhibits resistance on removal D. After cementation E. None of above 39 Most root canal infections involve A. a single obligate anaerobic species B. multiple anaerobic species only C. mixed aerobic and anaerobic microorganisms D. multiple aerobic species only E. none of above 40 An abnormally shaped tooth that may appear as an extra wide crown, a normal crown with an extra root, or other combinations resulting from the union of two adjacent tooth germs by dentin during development is called A. fused teeth B. concresence of teeth C. geminated teeth D. dilacerations of tooth E. taurodontism 41 Which isn’t the non-operative treatment of dental caries in the following? A. application of fluoride B. application of APF gel C. remineralizative therapy D. enameloplasty E. pit and fissure sealing 42 Which is not the aim of operative therapy on the dental caries management?