Alt. Fulcrums Flashcards
What are some examples of advanced INTRAORAL fulcrums?
- Cross Arch
- Opposite Arch
- Finger on Finger
What are some advantages to using an EXTRAORAL fulcrum?
- Easier access to 2 and 3 molars.
- Easier access to deep pockets on molars.
- Improved parallelism of lower shank to molar teeth.
- ergonmics
What are extra oral fulcrums?
Fulcrums that occur outside of the mouth.
What are some disadvantages to an extra oral fulcrum?
- Greater degree of muscle coordination.
- Greater risk for instrument stick.
- Reduced tactile sensation
- Not tolerated well with patients who have tmj.
What is a cross arch fulcrum?
Used to fulcrum in the same arch but opposite quads.
When would a cross arch fulcrum most likely be used?
Using horizontal strokes in proximal root concavities with the curet either toe up or toe down.
What is an opposite arch fulcrum?
Resting the fulcrum finger on the opposite arch of the treatment area.
When is an opposite arch fulcrum needed?
To improve access to deep pockets and facilitate parallelism.
What is a finger-on-finger fulcrum?
Resting the fulcrum finger on a finger of the non dominant hand.
What does a finger-on-finger fulcrum allow the clinician to do?
To fulcrum in line with the long axis of the tooth to improve parallelism of the lower shank to the tooth surface. Improve axis to deep pockets.
What is a basic extra oral fulcrum?
Resting the surfaces of the middle, ring, and little fingers on the skin of the bone of the mandible.
What is a finger assist fulcrum?
The index finger of the non-dominant hand placed against the instrument shank to concentrate lateral pressure against the tooth surface and control the working end.
