Full crown preparation using M R Dimashkieh self limiting bur

M R Dimashkieh Gauged Diamond
Full crown preparation

M R Dimashkieh
ü  No Over Reduction
ü  No Enamel lip creation
Conventional
×  Over Reduction
×  Enamel lip creation

1 mm Smooth Guiding pinRound end tapered diamond provided with 2
sizes 0.5mm and 0.7mm chamfer width
2 layers natural diamond coating
Spiral Geometry
ü  Turbo cutting, cool grinding with
optimal control
ü  Less pressure needed
ü  Does not harm the pulp
ü  Self cleansing
Dimashkieh, M. R. (1993). Modiﬁed rotary design instruments for controlled
ﬁnish line crown preparaAon. The Journal of prosthe0c den0stry, 69(1),
120-121.

How to use
Dimashkieh, M. R. (1993). Modiﬁed rotary design instruments for controlled ﬁnish line crown preparaAon. The Journal of prosthe0c den0stry,
69(1), 120-121.
M R Dimashkieh

Create the first 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.
M R Dimashkieh

M R Dimashkieh

When M R Gauged Diamond reaches
its full abrading depth the guiding pin
will rest on the external tooth surface
ü  No Over reduction
M R Dimashkieh

Create the second plane with
controlled reduction parallel to the
gingival half of the facial surface
M R Dimashkieh

When M R Gauged Diamond reaches
its full abrading depth the guiding pin
will rest on the external tooth surface
M R Dimashkieh

Uniform chamfer
margin without forming
a lip of unsupported
enamel
M R Dimashkieh

Reduce the palatal surface
M R Dimashkieh

Axial tooth reduction
completed with 0.5 mm
chamfer using small M R D
M R Dimashkieh

With 1mm step back (length of guiding pin)
Cerate a second 0.7mm facial finish line
using large MRD
M R Dimashkieh

1st 0.5mm Finish line
2nd 0.7mm Finish line
M R Dimashkieh

Joining the 1st and 2nd finish line with a
conventional round end tapered diamond to
produce 1.2 mm chamfer
M R Dimashkieh

1.2 chamfer
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
M R Dimashkieh

Always Start with supra-gingival
margin

Do not rest the guiding pin on the external gingival surface
If sub-gingival margin required move the bur toward the gingiva while
the guiding pin kept in contact with the external tooth surface

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

Full crown preparation using M R Dimashkieh self limiting bur

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