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paulg100
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"yes,,,sometimes i do spend a minute or to hitting ares to create a sealed margin....but don't the guys pressing dothat also?"
there is a big differene here:
The pressed units internal fit is a true representation of the prep surface. If there is a blip or small bubble from investing, its a interference and is a simple case of removing that and the unit seats.
With the milled units, the fit surface is not a true representation of the prep due to the low quality scan data and limitations of a 1mm bur. So what your actually doing is hand milling the fit surface to fit the die.
that is the big difference and why a pressed unit takes maybe 1 minute to fit down and a milled one is more like 10-15mins for me and even then the marginal fit dosent touch pressed.
there is a big differene here:
The pressed units internal fit is a true representation of the prep surface. If there is a blip or small bubble from investing, its a interference and is a simple case of removing that and the unit seats.
With the milled units, the fit surface is not a true representation of the prep due to the low quality scan data and limitations of a 1mm bur. So what your actually doing is hand milling the fit surface to fit the die.
that is the big difference and why a pressed unit takes maybe 1 minute to fit down and a milled one is more like 10-15mins for me and even then the marginal fit dosent touch pressed.