Dental Procedure Past Paper PDF

{112522818 00{0 Helvetica;} {;255255255;} {\*;;} 11900168401440144017280132000 720144021602880360043205040576064807200792086400 36 0\ \ 1. According to the study mentioned, what percentage of teeth experienced irreversible pulp pathosis when the intrapulpal temperature rose by 10\'b0C?\ a) 5%\ b) 1...

{112522818 00{0 Helvetica;} {;255255255;} {\*;;} 11900168401440144017280132000 720144021602880360043205040576064807200792086400 36 0\ \ 1. According to the study mentioned, what percentage of teeth experienced irreversible pulp pathosis when the intrapulpal temperature rose by 10\'b0C?\ a) 5%\ b) 15%\ c) 30%\ d) 60%\ Answer: b) 15%\ Quote: "It has been shown using primate models that an intrapulpal temperature rise of 10\'b0C causes irreversible pulp pathosis in 15%"\ \ 2. In the study where pulp abscess formation was observed, what percentage of teeth were affected when the intrapulpal temperature increased by 20\'b0C?\ a) 15%\ b) 30%\ c) 45%\ d) 60%\ Answer: d) 60%\ Quote: "a 20\'b0C rise caused pulp abscess formation in 60% of teeth evaluated."\ \ 3. How long did the pulp respond favorably to exposures in the study evaluating pulp capping procedures?\ a) Up to 6 hours\ b) Up to 12 hours\ c) Up to 24 hours\ d) Up to 48 hours\ Answer: c) Up to 24 hours\ Quote: "it was shown that the pulp responds favorably to exposures of up to 24 hours after exposure"\ \ 4. In the study using gradual controlled heat application, what was the approximate increase in intrapulpal temperature that did not show any clinical or histological changes after 2-3 months?\ a) 5\'b0C\ b) 8\'b0C\ c) 11\'b0C\ d) 15\'b0C\ Answer: c) 11\'b0C\ Quote: "In this study, an increase of intrapulpal temperature of about 11\'b0C followed by 2- to 3-month evaluation did not show any clinical or histological changes in the pulp of any of the teeth evaluated."\ \ 5. How long did continuous air drying of class V cavities in human molars cause significant displacement of odontoblastic nuclei and pulp inflammation?\ a) 15 seconds\ b) 30 seconds\ c) 45 seconds\ d) 60 seconds\ Answer: b) 30 seconds\ Quote: "One study showed that as little as 30 seconds of continuous air drying of class V cavities in human molars with uninflamed pulp caused significant displacement of odontoblastic nuclei, pulp inflammation and even areas of necrosis related to the areas that were dried."\ \ 6. Within how many days was there autolysis of aspirated cells and formation of reactionary dentin following desiccation?\ a) 1 to 3 days\ b) 3 to 5 days\ c) 5 to 7 days\ d) 7 to 30 days\ Answer: d) 7 to 30 days\ Quote: "However, another study showed that the effects of desiccation are transient and that within 7 to 30 days, there is autolysis of the aspirated cells and formation of reactionary dentin."\ \ 7. What is the estimated range of shrinkage for resins during polymerization?\ a) 0.1% to 0.5%\ b) 0.6% to 1.4%\ c) 1.5% to 2.5%\ d) 2.6% to 3.5%\ Answer: b) 0.6% to 1.4%\ Quote: "Shrinkage of resins is estimated to range from 0.6% to 1.4%"\ \ 8. At what temperature did heat increase in rat pulp tissue raise heat shock protein-70 and cause changes in alkaline phosphatase and gap junction proteins?\ a) 37\'b0C\ b) 40\'b0C\ c) 42\'b0C\ d) 45\'b0C\ Answer: c) 42\'b0C\ Quote: "A heat increase in rat pulp tissue to 42\'b0C and in vitro raised heat shock protein-70, which are known to be tissue protective, caused changes in alkaline phosphatase and gap junction proteins"\ \ 9. How far from the pulp did the cavity floor need to be for areas of coagulation necrosis to be seen in the study on heat application in deep cavity preparations?\ a) Less than 0.5 mm\ b) Less than 1 mm\ c) Less than 1.5 mm\ d) Less than 2 mm\ Answer: a) Less than 0.5 mm\ Quote: "In cases where the cavity floor was less than 0.5 mm from the pulp, areas of coagulation necrosis could be seen"\ \ 10. For how long did patients remain asymptomatic in the study on heat application in deep cavity preparations?\ a) 1 week\ b) 2 weeks\ c) 3 weeks\ d) 1 month\ Answer: d) 1 month\ Quote: "although the patients remained asymptomatic for the 1-month duration of the study."\ }