Exam 2 CH 39 Instruments and Principles for Instrumentation Flashcards
Sequence of instruments for treatment?
- 11/12 Explorer
- Ultrasonic
- Scaler
- Universal Curet
- Area Specific/ Gracey (Used for fine scaling/root planning)
Types of strokes by direction?
- Diagonal or Oblique
- Vertical
- Horizontal
Why do we not use a fulcrum on mobile teeth?
Because you do not have stability on mobile teeth and can cause further damage to an already weaken periodontium.
What instruments are used for an examination?
Probe, Explorer, and mirror
What instruments are used for treatment?
Curets and Scalers
Term; Relationship between the working end of an instrument and the tooth surface being treated?
Adaptation
Term; A curved , rounded dental instrument utilized for scaling, root planning, and gingival curettage?
Curet
Term; A specialized instrument designed with specific angles in the shank for adaptation to a certain group of tooth structures?
Area-Specific Curet
Term; A curet designed for use on any tooth surface where the adaptation, angulation and other principles of instrumentation can be correctly and effectively accomplished?
A Universal Curet
Term; For an intraoral rest, the place on a tooth or teeth where the third or ring finger of the hand holding the instrument is placed to provide stabilization and control during activation of the instrument?
Finger Rest
Term; Use of a dental mouth mirror to view the area of instrumentation. Indirect lighting is provided by the mirror?
Indirect vision
Term; The minimal pressure that is required of an instrument against the tooth to accomplish the objective of the assessment or treatment?
Lateral Pressure
Term; The blade of an area-specific gracey curet in which the lower shank is at 70 degree angle to the face of the blade; contrasts with a universal curet blade, which is at a 90 degree angle with the lower shank
Offset Blade
Term; Instrument designed for initial removal of calculus, prior to finishing with a curet?
Scaler
Term; The part of the shank next to the blade?
Lower or terminal Shank
Parts of an instrument?
Working End, Shank and Handle
Why do is Hollow handles preferred compared to solid handles?
Because they have enhanced tactile sensitivity and lessen fatigue
Surface texture; Handles may be smooth, ribbed, or knurled is called?
Serrations
T/F Serrations are for control and comfort without muscle fatigue, a smooth handle is avoided
True
What type of handle do you want?
Serrated Hollow instrument
T/F Straight shanks are used for Anterior(unrestricted) and Angled shanks are used for Posterior (restricted)
True
T/F In general, the more restricted the tooth access, the more angled the shank is used
True
T/F Heavier shanks are stronger and able to withstand greater pressure without flexing. They are needed for heavier calculus removal.
True
T/F Less rigid, more flexible shanks provide more tactile sensitivity and are used to remove fine deposits
True
T/F A finger rest is ALWAYS used when instruments are applied to the teeth and gingiva.
True
What does adaption of a gracey give you?
Gives you access to get into a pocket better.
Longer shank, Shorter blade
What is the modified pen grasp?
A three finger grasp with a specific target points of the thumb, index finger and middle finger all in contact with the instrument.
How much of the blade is used during instrumentation?
1/3 or last 3mm of blade
On a unviersal curet, the face of the blade is at what _______degree to the______?
90
lower shank
Area specific/ Gracey curets are what angle to the lower shank?
70
What are the objectives of a Finger Rest?
- Stability
- Unit Control
- Prevention of injury
- Comfort for the pt
- Control of length stroke
What are the four diameter handles available?
3/8
5/16
1/4
3/16
What is separable from the shank and working end. They permit instrument exchanges and replacements?
Cone socket
T/F Principles for instrument use; Stability is essential for effective, controlled action of an instrument
True
What are the causes of carpal tunnel?
Brought on by pressure on the median nerve in the carpal tunnel, is one of the nerve entrapment conditions that results from inappropriate work habits, such as working with a bent wrist
What is the working end of an instrument?
The part used to carry out the purpose and function of the instrument.
Each working end is unique to the particular instrument.
The working end of a scaler or curet is the BLADE.
What are problem areas for adaptation?
- Line angles
- convex and rounded surfaces (narrow roots)
- Cervical Area (root is constricted)
- Proximal root surfaces (concave, longitudinal grooves)
Form the back of the instrument?
Lateral surface
