:Healthy dentulous people and dentulous patients with temporomandibular disorders
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概要
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There have been many reports on Dental Prescale<SUP>®</SUP> (Prescale, Fuji Photo Film Co. ). However, few reports have referred to "the percentage of measurable contact area, " which is the ratio of the occlusal contact area generated by the measurable occlusal pressure to the total occlusal contact area in the Prescale system. The purpose of this study was to investigate the distribution of "the percentage of measurable contact area" at maximal clenching, and to clarify the relation between "the measurable contacts rate" and the total contact area. Subjects were 25 healthy dentulous people and 30 dentulous patients with temporomandibular disorders (TMD). Each group was classified into the following 3 subgroups according to occlusal contact area: less than 20mm<SUP>2</SUP>, 20∼40mm<SUP>2</SUP>, and more than 40mm<SUP>2</SUP>. Prescale 50H type R was used for measurements. The following results were obtained. 1) The means of "the percentage of measurable contact area" in the healthy group and the TMD group were 99.0±1.3% and 98.9±1.7%, respectively. There was no significant difference between the two groups. The percentages of subjects whose "percentage of measurable contact area" was 100% were 23.3% in the healthy group and 25.6% in TMD group. 2) There were significant correlations between "the percentage of measurable contact area" and the total contact area both in the healthy group and the TMD group. In the healthy group, "the percentage of measurable contact area" of the subgroup of less than 20mm<SUP>2</SUP> was significantly lower compared with the other two subgroups. In conclusion, it became clear that, mostly, "the percentage of measurable contact area" at maximal clenching in dentulous people is 100% or approximately 100%, and that "the percentage of measurable contact area" becomes lower when the total contact area is small. It was suggested that we need to take the value of the total contact area into consideration when we use Prescale.
- 一般社団法人 日本顎関節学会の論文
一般社団法人 日本顎関節学会 | 論文
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