Dental Arches
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Occlusion
Is the natural contact between the maxillary and mandibular teeth in all position.
Mandibular arch
Lower. Is capable of movement through the action of the TMJ. the mandible is the bone that supports the lower arch of teeth, the the name mandibular arch.
Maxillary arch
Upper. Is actually part of the skull and is fixed and not capable of movement. The teeth are set in the maxilla bone.