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Seat_in_5min_GRN

Does it take forever to adjust your crowns?

If the impression was accurate and the models poured properly it should only take a few minutes to adjust the crown in preparation for seating.

There are many factors that contribute to extra chairside adjustments. Look at the impression, does the tray  contain enough material to capture all the detail necessary? Are there  "pulls" or bubbles present? These add up to inaccurate impressions which lead to poorly fitting restorations, tight contacts and high bites.  Next we need to address the temporary.  It is not enough to have the temporary  just "fill the space", it must fit properly. If the contacts are too tight on the temp it will push the other teeth apart, when you seat the final restoration the contacts will be open or loose in the mouth but will be in contact on the model. If the contacts are loose on the temporary then we have the opposite situation, the crown will have tight contacts in the mouth but right on the model because the loose contacts on the temporary allowed the contacting teeth to move into the space to fill in the contacts. The same with the bite, if the temp is allowed to be out of occlusal contact the prep or the opposing tooth will shift to fill in the space which will cause the final restoration to be high and require a lot of adjustments. Any bubbles on the occlusal surface of the impression will hold the models apart when they are articulated causing the bite to be high and requiring adjustments.
Once you have an accurate impression and temporary then we move on to the laboratory. How the lab handles the impression and pouring the model has a tremendous impact on the fit of the final restoration also.
At Technique we have developed procedures to reduce chairside adjustments.
All materials must be weighed and measured to assure the proper ratios are maintained. Without this the expansion of the model will not be a true representation of the mouth which will require extra adjustments of the crown to seat. In the mouth the teeth move during the mastication process, the teeth on a stone model do not move. We equilibrate all cases to allow for the the movement of the periodontal ligament to replicate how the bite will be in the mouth when the patient bites down.
Working together as partners, giving each other constructive feedback will make your life easier and deliver a better experience and product to the patient.

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