Occlusion refers to how the teeth come together and function during jaw movement. The key components of occlusion include the teeth, jaws, temporomandibular joint, and muscles of mastication. Occlusion is studied by examining dental arch formation, tooth angulation, compensating curves, functional tooth form, and occlusal contacts during various jaw movements. The maxillary and mandibular dental arches have a parabolic curve shape made up of anterior, middle, and posterior segments. Proper occlusion develops through phases as permanent teeth erupt.