That reflects in that ceramic technically is a weak material except for the original Alumina based glasses. Modern ceramic materials excluding zirconia have a low resistance to abrasion and forces being applied as that also relates to compression damage, so in general we are not talking about Zirconia-copings or substructures but the top coatings, which spans various ceramic materials that are available and in general most technicians should be better taught a better understanding of material issues to avoid clenching headaches and continuous paranormal function plus the damage to the ceramic itself. I have studied occlusion for thirty years but the problem is not about occlusion, thats a tag name, its about how dentition opens and closes as an envelope of various movements that should generate minimal friction. So now we are using CONE BEAM to gather coordinates, to be able to generate grid maps to map how the patients mandible and dentition can track preoperative and post operative as the curve of Spee plays a large part to how this all works. Complicated, no its quiet easy to perform./h5>