dental hygiene instrumentation

  1. 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
  2. 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
  3. 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
  4. 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
  5. 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
  6. 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
  7. 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
  8. 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
Card Set
dental hygiene instrumentation
dh instrumentation