歯周病におけるカラー写真の利用に関する研究
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The color changes of human gingival epithelia offer an important information for the diagnosis of periodontal diseases. However, if observation is made with the naked eye, it is difficult to express the color correctly because each observer has some individual bias.<BR>To prevent this fault in observation, the author devised a method in which the tone of gingival color was interpreted objectively by numerical values.<BR>The author remodelled the ophthalmic fundus camera “Kowa RC-2”.<BR>The gingiva was photographed on reversal color film, and the light extinction of a specified wave-length through the developed film was measured with an electric spectrophotometer.<BR>The extinction curve showed two peaks at 440mμ and 540mμ in gingival photograpes.<BR>As the extinction was higher at 440mμ, the measurement of color was hereafter made at this wave-length.<BR>The results were as follows.<BR>(1) The correlation between the degree of extinction of films and clinical PMA index was very high (γ=0.82).<BR>(2) The greatest difference of light extiction between normal and pathological gingivae was found at the papillary and attached gingivae rather than at the alveolar mucosa and muco-gingival junction.<BR>(3) In case of intact gingivae, no significant changes in the degree of extinction were observed by usual stimuli such as brushing or eating.<BR>(4) The average extinction of buccal gingivae including molar teeth was not different from that of lingual (buccal) gingivae measured by a reflection mirror devised by the author.<BR>(5) The values of light reflexion from the standard color paper the light extinction through the color film obtained frow it showed the same tendency. Moreover, the extinction degree method was far more sensitive than the former method.<BR>(6) The extinction of color firm paralleled well the pathological conditions of the gingivae.<BR>It started to drop after beginning clinical treatment and reached its lowest value after 20 days of treatment.
- 有限責任中間法人 日本口腔衛生学会の論文
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- 歯周病におけるカラー写真の利用に関する研究