The change of gingival color offers an important part in the condition or diagnosis of the periodontal disease. But today, how to express the variety of gingival color is entirely up to personal choice of words. In other words the expressions even for a certain color are different from people to people. The point, therefore, is not clear and can only understood vaguely.
I have tried some studies on gingival color with the recent chromatic method—especially with the munsell book of color and spectrophotometer.
The results obtained from this study are as follow;
1) The gingiva compared with the munsell book of color.
2.5RP-2.5YR5.5-8/2-6
585nm--525nm
2) The gingiva cut off by gingivectomy measured with spectrophotometer.
585nm--545nm, 10P-5YR5-6.5/0-1.5
3) The acrylic resin measured with spectrophotometer.
595nm-620nm, 2.5R-10R4-6/7-10
4) The gingiva compared with gingival shade (G. S. G) of trial production.
Value and Chroma…
Uper gingiva<Lower gingiva
Hue…Uper gingiva=Lower gingiva
5) Papila, marginal area, attached area, of normal gingiva compared with G. S. G.
Value…Marginal area=Attached gingiva>Papillary area.
Chroma…Marginal area=Attached gingiva≥Papillary area.
Hue…Papillary area=Marginal area=Attached gingiva.
6) Morbid gingiva compared with normal gingiva.
Value…Normal gingiva>Gingivitis>Periodontitis
Chroma…Gingivitis>Normal gingiva>Periodontitis
Hue…Compared with normal gingiva, gingivitis,
seems to be inclined to the YR direction, while Periodontitis seems to by inclined to RP direction.
7) What we can examine and tell by using Shade Guide are limited.
Shade Guide is considered to be insufficient for the strict analysis of gingival color.
8) I could succeed in the measuring of gingival color by the test use of the color meter of trial production, but there are still some unsolued problems left.
My next report will cover the improvements of the color meter and its result in use.
