Perfect Crown Seating, Adjust-Clean-Polish

Figure 1

Fig 1
Crown #3 is tried on tooth #3. The crown margin fits up to the prep margin and looks good with an explorer, but the bite is slightly high. When the bite is high, the first thing to do is to check the proximal contacts.

The Black Diamond Strip is entirely unable to access the interproximal contacts on both the mesial and the distal sides of crown #3.


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Fig 2
A periapical radiograph shows that there is incomplete marginal seating on the distal proximal margin, and crown #3 is slightly pushed in on the distal.


Fig 3
The crown is taken to the working stone model and, using the Clear LAB Stone Strip, the proximal contact on the distal side of the crown is adjusted with several buccolingual passes.


Fig 4
The crown now fits well on tooth #3, and, using the Black Diamond Strip, the proximal contacts on the distal and mesial of crown #3 are confirmed via passing the strip through with only slight resistance.


Fig 5
The patient confirms that she feels natural and comfortable when biting. She feels no pressure or stress, but is comfortable, as if the crown were her own tooth. Occlusal adjustment is not performed yet.


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Fig 6
Radiograph shows complete marginal seating. Crown #3 is ready for definitive cementation


Fig 7
Crown#3 is cemented. A wooden CrownStick is used to fully and safely secure the crown onto the abutment.


Fig 8
The cement remnants in the interproximal space are removed using a White Serrated Strip


Fig 9
By using the Gray Final Polishing Strip, the proximal surfaces are polished to a natural texture, and Interproximal Relief is confirmed. Occlusal adjustment is done minimally.


Fig 10
Dental floss snaps in and out of the contacts firmly. When dental floss is on fingers it can become twisted, making it thicker and more unreliable for confirming Interproximal Relief than the Gray Final Polishing Strip.

Interproximal Relief and Complete Marginal Seating

Interproximal Relief and Complete Marginal Seating

In natural dentition, there is microscopic clearance or passive contact between teeth when they are in rest position, which is called Interproximal Relief (IR)*, and when a crown is fabricated, it is necessary to adjust the crown on the proximal contact surfaces to restore IR, and to achieve complete marginal seating for patient comfort and functionality.

Introducing PrepSure - Crown Preparation Guide

Introducing PrepSure - Crown Preparation Guide

I needed an instrument to guide and confirm the occlusal clearance mechanically to create ideal abutments every time for every patient. This avoids all the guesswork and any further waste of costly chair time, which could compromise an otherwise excellent patient experience.
And with that, PrepSure was born.