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The flashcards below were created by user
melissacarvalho
on FreezingBlue Flashcards.
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Instrument handles
weight: lightweight handles place less stress on the muscles of the hand and fingers
diameter- small diameter handles are (3/17inch) are difficult to hold and tend to cause muscle cramping
large diameter handles (3/8inch) are easier to hold and decrease muscle strain
texture: aka knurling
handles with no texturing decrease control of the instrument and increase muscle fatigue
handles with bumpy texturing maximize control of the instrument and reduce muscle fatigues
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mirror use to stop fogging of the reflecting surface:
1. warm the surface against the patients buccal mucosa
2. ask the patient to breath thru the nose
3. wipe the reflectiing surface with a commercial deffoging solution
4. wipe the reflecting surface with gauze moistened with mouthwash
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use of dental mirror
indirect vision- view a tooth surface of intraoral structure that cannot be seen directly
retraction- used to hold patients cheek, lip, tongue, so that clinician can view tooth surface
indirect- use mirror surface to reflect light onto a tooth surface in dark area of mouth
transillumination- is the tech, of directing light off the mirror surface and thru the anterior teeth
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finger placement and function
index and thumb- on the instrument
middle finger- rests lightly on the shank: helps guide the working end
ring finger- on oral structure/tooth surface- stabalizes the hand control and strength - little finger- relaxerd manner- has no function in the grasp
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Instrument identification
- handle- holding the instrument
- shank- rod-shaped length of metal located between the handle and the working -end
- working end- does the work f the inst. working end begins where the instrument shank ends
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what is the definiton of ergonomics?
is the science of adjusting the design of tools, equipment, tasks and environment for safe, comfortable and effective human use
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seat positioning
- 1. neutral neck position 0-15degrees
- 2. neutral back position 0-20 degrees
- 3. neutral shoulder position- shoulders in horizontal line
- 4. neutral upper arm position- upper arms hang parallel to the long axis of torso 0-20degrees
- 5. neutral forearm position- 60-100degrees
- 6. neutral hand position- little finger side of palm slightly lower than thmb side of palm
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Sextants
- 1. max.right post sext
- 2. max. ant. sextant
- 3. max. left post. sext
- 4. mand. left post sext
- 5. mand. anterior sextant
- 6. mand. right. post sext
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