Oct 2021 Endo

A 32-year-old woman came to the clinic with facial swelling and severe pain after she saw her dentist a few hours ago. She stated that her dentist mentioned a hypochlorite accident during non-surgical root canal treatment. Which of the following is the most likely cause of apical extrusion of the irrigating solution?

A 50-year-old woman presents to the dental clinic for evaluation of upper left premolar and molar teeth. The patient stated that she had severe spontaneous pain 6 weeks ago while on a holiday. The pain has eventually subsided without dental intervention. Teeth #24, 26, and 27 responded normally to all endodontic tests. Tooth #25 did not respond to cold. A sinus tract was noted on the alveolar mucosa buccal to tooth #25. Which of the following is the endodontic diagnosis for tooth #25?

Which of the following mishaps occurs by violating the danger zone of multi-rooted teeth with over-use of Gates-Glidden bur or files?

A 64-year-old man with no relevant medical history complains of pain upon eating. Clinical examination on tooth #46 revealed a normal response to cold and tenderness to percussion. On the other hand, tooth #47 was very tender to percussion and palpation. Which of the following would be the best treatment?

A 60-year-old man presents to the dental clinic for comprehensive dental treatment. On examination, tooth #47 has overhanging crown margins. The tooth is negative to both palpation and percussion tests. The prosthodontist plans to place a new PFM crown for tooth #47. Which of the following is the recommended endodontic plan for tooth #47?

During a non-surgical root canal treatment of tooth #45, an instrument separation occurred in the coronal one-third of the canal. Which of the following is the best way of managing this case?

A 34-year-old patient presented to the clinic for treatment of tooth #36, which is tender to biting and percussion. A radiograph of the tooth shows furcal perforation beneath the existing restoration. What is the most appropriate treatment for tooth #36?

A 65-year-old patient complains of spontaneous, dull pain in the upper right quadrant. Upon clinical examination, tooth #17 is tender to biting and percussion. No clinical signs of sinus tract or swelling are present. Which of the following is the likely endodontic diagnosis of tooth #17?

Which of the following irrigants has the highest antimicrobial activity against endodontic infection?

A 57-year-old patient presented for root canal treatment of tooth #16. Upon examination, the tooth has a positive response to percussion and palpation, and negative to cold and EPT. Which of the following is the most likely diagnosis of tooth #16?

A dentist is preparing a post space in the palatal root of tooth #26 under rubber dam isolation using rotary instruments. As he is withdrawing the bur from the cavity, he finds traces of blood on the bur. He uses paper points to dry the canal but they also come out stained with blood. Which of the following is the most appropriate next step?

Which of the following is a probable cause of a ledge impediment?

Gutta-percha is currently the standard and universally accepted core obturating material in most root canal treatments. Which of the following is the disadvantage of this material?

Which of the following is the generally preferred time for repairing the defect if a cervical root perforation occurs during incomplete root canal treatment?

Which of the following sealers is epoxy resin-based?

A 22-year-old man presented to the clinic complaining of shooting pain on biting his maxillary left tooth, which subsided as soon as he released the bite. On clinical examination, tooth #25 had a large disto-occlusal composite filling and was tender to both vertical and horizontal percussion. The patient mentioned that he was dieting and frequently ate nuts. The gingival tissue around the tooth was healthy. There were other teeth in his mouth that required simple filling. Radiographic examination showed that the tooth was root canal treated and the restoration margins were intact. Which of the following is the most likely diagnosis of this tooth?

A 22-year-old woman was seen in the clinic for a dental abscess in the mandible due to a non-vital tooth #35. She was treated with oral antibiotics. She returned to the clinic with persistent abscess and pain. Which of the following could have prevented the persistence of the infection?

Which of the following root canal types is the most difficult to instrument?

A 63-year-old patient complains of throbbing pain in the upper left area. Upon examination, tooth #26 does not respond to cold and is tender to both percussion and biting. No clinical signs of swelling or sinus tract are present. Which of the following is the endodontic diagnosis of tooth #26?

A 36-year-old patient complains of sharp, spontaneous pain waking him up at night. Tooth #47 responds to thermal tests with lingering pain but is negative to percussion nor biting pressure. No sinus tract or swelling present is present clinically. Which of the following is the endodontic diagnosis of tooth #47?

In which root can an extra canal be found in upper first molars?