Nutrition intaking, exercise and social participation are indispensable element to maintain human health condition avoiding bedridden condition. The first digestive organ, the masticatory system is the most important mechanical construction of our body construction. Chewing system is formed by teeth and occlusion as a mechanical cutter, Myoneurologically and mechanically controlled soft tissues and fundamental skeletal movement. Even a lack of single factor causes some threaten to keep healthy life. Missing teeth are compensated by applying artificial teeth with conventional Prosthodontic treatment or In-plant of artificial roots into the bone structure. Both of them have some specific advantage and disadvantage each other, stoutness and stability, convenience, bioinvasive and bone adhesions.
Basically, ordinary people have a discrepancy of Centric Jaw Position between skeletally destined jaw relation position and Myoneurologically controlled jaw position because of the relative upper and lower dentitions. The effect of mandibular deviation cannot be ignored that occurs during the unstable period of central mating while the deciduous tooth exchanging period. The less discrepancy, the better. Mandibular centrality is lost when clossover biting condition occurs whatever portion it might be. Hitting and destroying enamel tissue of the tooth while mastication must be avoided, so the lower jaw movement near at centric occlusion position is well controlled by Myoneurological system.
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