The ContacEZ Crown SeatEZ Method is convenient for dentists and comfortable for patients, but there is a learning curve that I would like to help dentists overcome.
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.
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.
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.
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.
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.
Radiograph shows complete marginal seating. Crown #3 is ready for definitive cementation
Crown#3 is cemented. A wooden CrownStick is used to fully and safely secure the crown onto the abutment.
The cement remnants in the interproximal space are removed using a White Serrated Strip
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.
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.
In my office, I have experienced that about 50% of crowns are too tight, and the Black Diamond Strips cannot get into the interproximal space to adjust the proximal contacts. Occasionally, the crowns are even too wide to fit into the space between two adjacent teeth, which can be very frustrating to dentists.
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.
Looking to satisfy the demand for both speed and safety with motorized IPR, ContacEZ has unveiled its latest product—SupraDisc. Designed for use with Invisalign®, ClearCorrect, eCligner, Six Month Smiles®, and other orthodontic treatments, SupraDisc offers orthodontists and general dentists a new, safe, and efficient way to effectively perform what has often been a worrisome procedure.