Mandibular movement occurs as a complex series of interrelated three-dimensional rotational and translational activities. Jaw movements or mandibular kinematics has important applications in many fields of clinical dentistry and provides a basis for modern concepts of dental occlusion. In all branches of dentistry, occlusion is defined as the most important as well as the most confusing concept. Any contact between the occlusal surfaces of the maxillary and mandibular teeth is defined as occlusion. To understand the concept of occlusion, it is necessary to have knowledge about a broad range of subjects, including the contact relation between teeth; mechanics, mathematics, and geometry of jaw movements; the biological response of natural teeth under different conditions; and functional analysis. In this chapter, the related definitions, mandibular border movements, types of occlusion, occlusion in complete dentures, rules and laws of articulation, and incisal and condylar path inclinations are elucidated.
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