Study models with ideal posterior intercuspation
were identified and their lateral cephalograms were included in the study.
16% of individuals had clicking sound, 79% of individuals had a maximum intercuspation
. 4% of individuals had slight deviation while opening the mouth and had pain over cheek and temporomandibular joint area.
For efficient deglutition, the mandible assumes a fixed, stable position, by intercuspation
of the occlusal surfaces, immediately before the tongue pushes the food bolus towards the oropharynx.
Discrepancies between CR and maximum intercuspation
(CR-MI), or centric occlusion, may be considered a controversial contributory factor to the development of temporomandibular disorder (2-6).
Lateral cephalograms for all the subjects were taken with teeth in maximum intercuspation
, standing in an upright position with FH plane being parallel to the floor.
Andrews described the six characteristics of normal occlusion and found that the curve of Spee in subjects with good occlusion ranged from flat to mildly curved, noting that the best intercuspation
occurred when the occlusal plane was relatively flat.
Longitudinal study of dental arch relationships in Australian Aboriginals with reference to alternate intercuspation
. American Journal of Physical Anthropology 1987;72(1):49-57.
An anterior open bite (OB) is a vertical gap between the maxillary and mandibular incisors with teeth in maximum intercuspation
. (8) Anterior OB can be classified as mild or severe; the former can be treated orthodontically, whereas the latter may entail significant vertical skeletal component combined with orthodontic--surgical treatment.
In addition, the vertical overlap was also measured by vertical superposition of the upper incisors on the lower, with the volunteer in maximal intercuspation
, using a caliper.
Several authors have found disturbances in centric relation (CR)-maximum intercuspation
(MI)-non centric position of condyles in TMJ and as an important risk factor for TMD [14, 18, 19], and others have opposed this theory [20-22].
A 35-year-old female patient presenting a unilateral skeletal crossbite in maximum intercuspation
attended the postgraduation orthodontic clinics with the main concern of "crooked smile" and had never undergone orthodontic treatment.
The study was conducted by analyzing images obtained from cone beam computed tomography (CBCT) taken in the maximum intercuspation
position using the PlanMeca[R] device (Korea); the images were analyzed in the EZ3D plus computer program (2009) by a single observer who took the measurements at two-week intervals; the correlation coefficient between the first and second measurement was 0.99 and presented a value of p=0.001.