When seating crowns, Interproximal Relief (IR) should be restored as it exists in natural dentition. IR is the passive contact or microscopic clearance between teeth when they are in rest position. In my experiments, this clearance cannot be properly detected with floss, because floss is too thick and an inaccurate measuring device.
The best way to adjust proximal contacts of newly fabricated crowns had been a long-standing, unresolved issue in operative dentistry until the introduction of the ContacEZ Ideal Proximal Contact Adjuster. Excessively tight proximal contacts cause the incomplete marginal seating of crowns, the extrusion of adjacent teeth, and anterior teeth crowding - this leads to patient discomfort, hypersensitivity, and recurrent dental caries at the crown margins.
Dental school curricula offer surprisingly little instruction on adjusting proximal contacts, and there is little written research on this subject.
After years of research and experiments, I developed a clinically-proven method for determining and adjusting proximal contacts by using the ContacEZ Black Diamond Strip. With this method, ideal proximal contacts can be achieved accurately and with minimal time and effort. This leads to complete marginal seating of crowns while enhancing patient comfort and functionality immediately upon definitive cementation.