Die Spacer on Implant Abutments: How Much is Enough?
Dr. K. asks:
How much die spacer should the dental lab place on implant abutments? My understanding is that the dental labs generally place about 50 microns of die relief on the dies for bridges on natural teeth and wax the framework to that. You need room for cement, so that is one clear need for die relief. Also, since implants are osseointegrated and have no periodontal ligament, die relief is necessary to compensate for the lack of movement of abutments. What are you requesting from your dental labs? What are dental labs doing about die relief on implant abutments?
2 Comments on Die Spacer on Implant Abutments: How Much is Enough?
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Alejandro Berg
2/10/2009
SOrry, Why is the lack of movement in the abutment a problem?, are you expecting to compensate the lack of ligament with cement?I dont see how. For a cemented fixed partial or a cemented crown you need as little as 20 microns (or the minimal film space of your cement of choice) all the other compensations should be done via oclusion.In implant dentistry cement should mostly act as a periferal seal, the rest of the retention should be obtained by decreased convergence angles.
best of luck
anon
2/10/2009
I've received some encode abutments milled at 6 degrees of taper and trying to get a crown off of those even with temp cement is challenging.
