When are the various support discs used?
When is the quadrant support used?
The draw-wire direction must be strictly aligned to the axis of the root.
To correct the support surface (occlusal plane), use the various support discs and/or the quadrant support.
The support plane can usually be sufficiently corrected with the asymmetrical support disc.
If there are free end gaps or strong protrusion/retrusion, use the quadrant support for correct extractor positioning.
The putty should be as thin as possible, otherwise the extraction tension will cause a spring force. This results in worse power transfer and uncontrolled root detachment.