Some questions in fixed prosthodontics

[ShathaAhmed]

What is the difference between a torpedo stone & a torpedo bur?
& what is the reverse 3/4 veneer?

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[oralcare123]

Torpedo is a shape. Bur is a bur, usually for cutting or smoothing, depending on coarseness, and stone is a stone, for smoothing and polishing.
3/4 veneer or 3/4 crown is a veneer prep, when incisal is reduced 2mm. The rest is prepared as usual
At least this is my opinion