: A key concept introduced by the authors, suggesting that there should be a small area of "flat" contact in the center of the occlusion to allow for minor functional movements without interference.
Contemporary occlusion textbooks (Okeson, Dawson, McNeill) cover these topics differently, but the Ash & Ramfjord version remains the clearest distillation of the . Occlusion Ash Ramfjord Pdf 58
, they developed a "Unified Concept of Occlusion" that integrated clinical practice with research into how the brain and muscles control jaw movement. The 4th Edition (1995) : A key concept introduced by the authors,