# DHYG 101L LECTURE: Anterior Instruments Lecture Exam (Oct 11)

## Quiz by Schweitzer, Marlee

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239 questions

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- Q1what does a 90 degree angle look like?a right angle, perpendicular to something else makes a 90 degree30s
- Q2what does a 45 degree angle look like?half of a right angle, an acute angle30s
- Q3what is the definition of parallel?2 lines running adjacent in the same plane that will never intersect30s
- Q4where do we see things that are parallel when instrumenting?long axis of the tooth & interproximal spaces & the instrument shank are seen as parallel when instrumenting30s
- Q5what is the range and correct/ideal angulation for calculus removal?60-80 degrees is ideal with 70 being optimal... but the full range for calc removal is 45-90 degrees30s
- Q6what is the correct range of angulation for insertion of instruments before calculus removal?0-40 degrees30s
- Q7what are the 4 different types of line/stroke directions whe instrumenting?vertical, horizontal, oblique, & circumferential30s
- Q8what is another name for an oblique stroke?a diagonal stroke30s
- Q9what is the definition of a cross-section of an object?cutting something in half to look in the middle of it30s
- Q10what are the 3 possible cross-section shapes for periodontal instruments?triangular, circular, & semi-circular30s
- Q11do we measure in mm or cm for instrument stroke length and probe depths?measure in mm30s
- Q12how many mm are in 1 cm?10mm = 1cm30s
- Q13a UNC-15 probe can measure up to how many mm depth?15 mm30s
- Q14what is the definition of the midline (of a tooth)?bisects the object/tooth in half down the middle30s
- Q15what does each BLACK band on a probe usually indicate?the different levels of perio disease... the first black band is one of the first stages of perio and the higher the black bands go the worse the stages of perio get30s