3. Create the cervical margin first with
controlled reduction parallel to the
gingival half of the facial surface
Dimashkieh, M. R. (1993). Modified rotary design instruments for controlled finish line crown
preparaAon. The Journal of prosthe0c den0stry, 69(1), 120-121.
6. M R Dimashkieh
Create the second plane with
controlled reduction parallel to the
incisal half of the facial surface
Dimashkieh, M. R. (1993). Modified rotary design instruments for controlled finish line crown
preparaAon. The Journal of prosthe0c den0stry, 69(1), 120-121.
7. M R Dimashkieh
When M R Gauged Diamond reaches
its full abrading depth the guiding pin
will rest on the external tooth surface
Dimashkieh, M. R. (1993). Modified rotary design instruments for controlled finish line crown
preparaAon. The Journal of prosthe0c den0stry, 69(1), 120-121.
16. M R Dimashkieh
If the finish line required to be sub-
gingival move the rotating diamond
toward the gingiva while the pin is kept
in contact with the external tooth surface
Dimashkieh, M. R. (1993). Modified rotary design instruments for controlled finish line crown
preparaAon. The Journal of prosthe0c den0stry, 69(1), 120-121.
18. M R Dimashkieh
The guiding pin can enter into the
gingival sulcus up to 1.0 mm
Dimashkieh, M. R. (1993). Modified rotary design instruments for controlled finish line crown
preparaAon. The Journal of prosthe0c den0stry, 69(1), 120-121.
23. M R Dimashkieh
The guiding pin can enter into the
gingival sulcus up to 1.0 mm
Remember, Guiding pin
should not rest on
external gingival surface
during preparation at all
time
24. Provided with 2 Sizes 0.7 mm – 0.5 mm
Different combination of diamond sizes and step back produce different
depth of finish lines as required:
0.5 + 0.5 = 1 mm
0.5 + 0.7 = 1.2 mm
0.7 + 0.7 = 1.4 mm
Dimashkieh, M. R. (1993). Modified rotary design instruments for controlled finish line crown
preparaAon. The Journal of prosthe0c den0stry, 69(1), 120-121.
25. References:
1. Dimashkieh, M. R. (1993). Modified rotary design
instruments for controlled finish line crown preparation. The
Journal of prosthetic dentistry, 69(1), 120-121.
2. Boening, K. W., Kaestner, K. I., Luthardt, R. G., Walter,
M. H. (2001). Burs with guide pins for standardized tooth
preparation. Quintessence International, 32(3).
3. https://www.researchgate.net/profile/Reda_Dimashkieh