QA Midterm Answers (1) PDF

 ❖ True & False 1- The most stable form of hydroxyapatite is at an environment with a pH of 5.5. ( ) 2- Shallow grooves is a more expected to suffer from dental decay ( ) 3- Acidogenic bacteria is a bacteria which produce acid as a byproduct of their metabolism (...

 ❖ True & False 1- The most stable form of hydroxyapatite is at an environment with a pH of 5.5. ( ) 2- Shallow grooves is a more expected to suffer from dental decay ( ) 3- Acidogenic bacteria is a bacteria which produce acid as a byproduct of their metabolism ( ) 4- Ecological plaque hypothesis was believing that only specific bacteria caused the disease. ( ) 5- presence of high fat or proteins makes carbohydrates less cariogenic ( ) 6- In Tempering heat treatment , instrument is heated to 815°C in oxygen free environment and then quenched in a solution of oil ( ) 7- Shaft is the part where any angulation of the instrument can be placed ( ) 8- When the bevel is distal to shaft it’s called regular bevel ( ) 9- Naming of an instrument generally moves from 1 to 4 1  ❖ Give reason 1- Saliva playing a protective role in the process of remineralization …………………………………………………………… …………………………………………………………… …………………………………………………………… ……………………………… 2- fluoride is known to prevent caries by inhibiting demineralization on the surface …………………………………………………………… …………………………………………………………… …………………………………………………………… ……………………………… 3- in Early childhood caries (ECC) the lower teeth are not affected : …………………………………………………………… …………………………………………………………… …………………………………………………………… ……………………………… 2