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Occlusion is a fundamental concept in dentistry yet it is commonly overlooked as it's perceived as being not important or too difficult to teach and understand. Clinicians should have a sound understanding of the principles regarding occlusal harmony in order to be able to recognise and treat common problems associated with occlusal disharmony.
Class I: The molar relationship of the occlusion is normal or as described for the maxillary first molar, with malocclusion confined to anterior teeth [4] Class II : The retrusion of the lower jaw with distal occlusion of the lower teeth (or in other words, the maxillary first molar occludes anterior to the buccal groove of the mandibular first ...
Lingualized occlusion is defined as a form of denture occlusion that articulates the maxillary lingual cusps with the mandibular occlusal surfaces in centric, working, and non-working mandibular positions. [1] The concept of lingualized occlusion was again influenced by Gysi, when he designed a crossbite posterior teeth model concept. [8]
Class I with severe crowding and labially erupted canines Class II molar relationship Edward Angle , who is considered the father of modern orthodontics, was the first to classify malocclusion. He based his classifications on the relative position of the maxillary first molar . [ 33 ]
The Angle classification divides occlusion and malocclusion into four distinct classes: normal occlusion, Class I, II, and III. Although both normal occlusion and Class I have the same molar alignment relationship, there is a distinction in how their teeth are organized in relation to the line of occlusion.
Intercuspal position (ICP), also known as centric occlusion, is a position in which teeth occlusion plays an important role. In the majority of population, centric occlusion is said to be averagely 1 mm anterior to centric relation in the natural dentition. [5]
Anterior open bite resulted from tongue thrusting in a 24 y.o. patient. Anterior upper teeth are not touching their counterpart. Anterior open bite (AOB) is defined as a condition in which there is no contact and no vertical overlap of the lower incisor crown with the upper incisor crown when the mandible is in full occlusion. [19]
This is judged with the patient seated upright, head in a neutral horizontal position, and teeth in gentle occlusion. It can be classified into the following classes: Class I: The ideal relationship whereby the upper jaw lies 2-4mm in front of the lower jaw Class II: Upper jaw lies more than 4mm in front of the lower jaw