Thermal or mechanical stimulation associated with food intake is said to be one of the most common local irritations for the gingival tissues. The purpose of this study is to find out the effect of these factors on the microcirculatory system of the oral mucous membrane. Cheek pouches of Syrian Golden hamsters were exposed to thermal, mechanical and chemical irritations for a certain period and were investgated using the capillaromicroscope.
The results were as follows: When cheek pouches were tested by 0.5ml heated water (60°C) in 10 seconds, the artery of the microcirculatory system shrunk after 5 minutes of its stimmulation, and after 10 minutes, it was reconverted. Secondary shrinkage appeared after 20-50 minutes and recovery was observed as same as the control side after 4 hours. But the ramarkable changes did not occure in the venous microcirculatory system. When the membrane was stimulated using vibrator for 30 seconds, the artery of the microcirculatory system contracted after 5 minutes and reconversion was observed after 10 minutes. When the membrane was investigated by the use of 10% croton oil solution, the artery of the microcirculatory system began to shrink immediately after application, and the most shrinkage was observed after 1 hour and recovery occurred after 4 hours.

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The very rare case reported here is a periodontosis with hyperkeratosis palmo-plantaris. The patient is a girl, nine years of age. Her father and mother are first cousins. Shortly after birth, skin changes of hands and feet appeared: the skin in the area of palms and soles became coarse and scaling, some superficial grooves were noted. Otherwise the skin presents a normal aspect. The deciduous teeth erupted normally, but shortly afterwards the gums became inflamed and purulent; the teeth loosened and lost. Her permanent teeth erupted normally, but at her 6th years of life, she suffered again from inflamed and suppurating gums. This inflammation is still present.
The gingiva was a severe, almost generalized inflammation with deep pockets containing a purulent exudate. Diastemata could be fairly seen. The roentgenograms showed severe generalized alveolar bone resorption. Excepting these, she enjoys good health and has never suffered from special diseases.
The patient had a thorough examination, including local and systemic tests. No systemic factor could be found in this patient and almost all of the findings were in the normal range. Analysis of the systemic and local factors in this case could not offer a satisfactory explanation for the genesis.

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On the purpose of clinical utility in the field of periodontal disease, the author devised the measuring probe of gingival pocket in which the calibrated portion are differentiated by colors. This measuring probe stand against any kind of sterilization by heat as well as those by chemicals. Measuring the depth of the gingival pocket is instantly completed by the insertion of this probe into any portion of the gingival pockets.
The 56 sites of gingival pockets on the labial/buccal and lingual sides of the 28 teeth in the upper and lower jaws can be measured in 3 or 4 minutes.
Accuracy of the value of this measurement is only 0.2mm deviation 1mm on the measuring probe are shown evidentiy on the X-ray film.

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