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조철,한경수,진태호 원광대학교 치의학연구소 1990 圓光齒醫學 Vol.1 No.1
Occlusion should be evaluated in view of the normal physiologic individual variations, and properly treated for good occlusal conditions that have harmonious interrelation to masticatory functions. To do so, thorough knowledge and close examination on dental morphology, contacts during excursions, the mandibular movements, masticatory muscles and temporomandibular joint are essential to every clinician. Occlusal contacts during movements is as much important as other components or parameters above mentioned because it reflects not morphologic static status but functional dynamic demands and abilites of masticatory system. The objectives of this study was to investigate and analyze of the effects of chewing side and lateral guidance pattern on the occlusal contacts. The author selected 65 students in Wonkwang University Dental College who had not any mandibular dysfunction, and no extensive dental treatment history. They classified by chewing side preference and lateral guidance pattern into 4 groups. To record occlusal tooth contacts, T-Scan System(Tekscan Inc., U.S.A) was used on maximal clenching. Record was done 3 times for accuracy, for every subject. The data was analyzed on 3 items which were number of tooth contact points, distribution of early contact points and average contact time intervals, and then, tested statistically. The obtained results were as follows 1. The range of contact points on both sides in all groups were from 28 to 32. Bilateral canine guidance group had the most contact points, and unilateral non-canine guidance group had the least. Statistical difference between right and left side(or ipsilateral and contralateral side) were noted in all groups 2. Degree of accordance of early contact points with preferred chewing side was higher in non-canine guidance groups, which was more prominent in case combined with was more prominent in case combined with unilateral chewing. 3. Average contact time intervals were from 0.015 to 0.019sec, and showed no statistical difference among 4 groups. But, there was a tendency that the intervals were increased with canine guidance and/or unilateral chewing pattern.