University of Khartoum

Pattern of Occlusion during lateral Excursion among Dental Students at University of Khartoum

Pattern of Occlusion during lateral Excursion among Dental Students at University of Khartoum

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Title: Pattern of Occlusion during lateral Excursion among Dental Students at University of Khartoum
Author: Omer, Amar Nooraldin
Abstract: Background Establishing or providing occlusion that successfully permits efficient masticatory function is basic to dentistry. To maintain harmony of the occlusal condition, the posterior teeth must pass close to but not contact their opposing teeth during mandibular movement. Anterior guidance is essential to a harmonious functional relationship in the masticatory system. Objective The objective of this study was to find out the frequency of pattern of occlusal contacts in lateral position with the use of shim stock . Method This study was conducted in the Department of Conservation University of Khartoum. Total population of this study was 236. Males in this study were 92 and females were 144 with percentage 39%, 61% respectively between the age group of 17-25years. They were selected randomly from undergraduate students, and written consent was taken. This age was selected because of minimal occlusal wear. Occlusion pattern recording method Shim stock of 12 μ was used in this study .The interocclusal contacts were recorded using shim stock. Each subject was required to sit upright in a dental chair with the Frankfurt horizontal plane almost horizontal. The shim-stock was placed simultaneously on the occlusal surface of the right side, most posterior mandibular molar, and the subject was requested to close his/her mandible to the maximum intercuspation. With a constant pulling force maintained on the shim-stock, the subject was requested to perform a habitual gliding movement to the right with the teeth in light contact for the working side contact. The nonworking side contacts were examined when the shim-stock were placed one by one on the occlusal surfaces of mandibular posterior teeth on left side and the subject was asked to move the mandible towards the right side. Then, this examination repeated on the left side. After the movement the occlusal contact patterns was examined in 0.5, 1, 2, 3 mm lateral to the habitual centric occlusion. Results Distribution of patterns of occlusion among sample as follow:- Canine guidance 34.7% .group function 49.2% balanced occlusion 2.5%, mixed occlusion 5.9% and unclassified 7.6%. Conclusions Most of the study population consisted of females; the common pattern of occlusion was group function. There was difference between left and right pattern of occlusion. Mixed occlusion showed higher percentage of functional side interferences.
URI: http://khartoumspace.uofk.edu/123456789/25582


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