Kishan Choithani

Occlusal contacts are subjected to constant change tooth restoration, extraction and prosthetic care always change the occlusal proportions. A discrepancy in occlusion may be realistically measured in micrometers. Accurate registration of occlusal contacts permits removal of occlusal interferences to establish a harmonious occlusion. Due to the availability of various occlusal indicating materials even a minute deflective contact can be detected and corrected. Any type of prosthesis made should be checked extraorally i.e. in laboratory and then intraorally for any occlusal interferences.

THE MASTICATORY SYSTEM, a functional unit of the body, is primarily responsible for chewing, speaking, and swallowing. Its components also play a major role in tasting and breathing. The system is made up of bones, joints, ligaments, teeth, and muscles. In addition, an intricate neurologic controlling system regulates and coordinates all these structural components. The masticatory system is a complex and highly refined unit. A sound understanding of its functional anatomy and biomechanics is essential to the study of occlusion. The area where the mandible articulates with the temporal bone of the cranium is called the temporomandibular joint (TMJ), certainly one of the most complex joints in the body. It provides for hinging movement in one plane and therefore can be considered a ginglymoid joint. However, at the same time it also provides for gliding movements, which classifies it as an arthrodial joint. Thus it has been technically considered a ginglymoarthrodial joint. THE ALIGNMENT AND OCCLUSION of the dentition are extremely important in masticatory function.