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 pin Round 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).ModifiedrotarydesigninstrumentsforcontrolledfinishlinecrownpreparaAon.TheJournalofprosthe0cden0stry,69(1),120-121.

How to use


M R Dimashkieh

Create the first plane with controlled reduction parallel to the incisal half of the facial surface


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


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


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

Healthcare