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november 25th quiz
preclinical dental asst theory
Question | Answer |
---|---|
what are matrix bands made of? | stainless steel |
what are matrix bands with wings for? | for deep cavities in gingival layer |
who created cavity classification? | G.V. Black |
What is class I cavity? | posterior & anterior - all teeth pits & fissures |
what is class II cavity? | posterior - proximal surfaces - mesial & distal |
what is class III cavity? | anteriors - interproximal |
what is class IV cavity? | anteriors - mesial incisal - facial & lingual |
what is class V cavity? | all teeth - cervical - facial or lingual |
outer knob of tofflemier does what? | holds band into slot |
inner knob of tofflemier does what? | makes matrix band bigger or smaller |
spindle of tofflemier does what? | holds matrix in place |
diagnol slot of tofflemier does what? | hold wings in place |
guide channel of tofflemier does what? | which way wings go |
what are the 9 basic cutting bur shapes? | round, inverted cone, plain fissure straight, plain fissure cross-cut, tapered fissure straight, papered fissure cross cut, end cutting, wheal bur, pear bur |
what is the round bur used for? | used 1st to access the cavity and for decay removal |
what is the number series for the round bur? | 1-8 and 10 |
what is the inverted cone bur used for? | removes decay and makes undercuts in the cavity preparation |
what is the number series for inverted cone bur? | 311h, 34-39, 36L, 37L |
what is the plain fissure straight bur used for? | forms walls for the cavity prep |
what is the number series for the plain fissure straight bur? | 55-60, 57L, 58L |
what is the plain fissure cross-cut bur used for? | forms walls for the cavity prep |