Oslo, NorwayL OSS of alveolar bone is one of the cardinal symptoms of periodontal disease, and resorption of the alveolar crest can be evaluated roentgenologically. In an examination of an Indian population Marshall-Day and Shourie 1 observed alveolar bone loss in all persons above 17 years of age. The bone loss was most advanced around the front teeth and molars in the lower jaw, and least advanced around the premolars. The resorption of the alveolar crest was measured in tenths of the optimum bone height.Belting, Massler and Schour 3 examined 5014 adult men in Chicago, and found that the resorption of the alveolar bone started before the age of 20-24 years. Bone loss was considered to have taken place when the alveolar crest was found 2 mm or more from the cemento-enamel junction.
ABSTUCT-The side effects of chlorhexidine mouth washes have been evaluated in a group of 50 soldiers during a period of 4 months. Previous publications have shown the effects on plaque formation and gingival conditions. The present paper discusses urifavorable side effects. When rinsing with 0.2 and 0.1 yo chlorhexidine gluconate and acetate, some desquamations and soreness in the oral mucosa were observed. lwelve per cent of the tooth surfaces and 62 "/c of the silicate fillings were discolored, while 36 % of the test persons developed discolored tongues in the experimental period. Because of the side effects, there are some objections LO uncritical use of chlorhexidine in preventive dentistry. A close control is necessary; and until more information is gained, the use of chlorhexidine mouth washes is recommended for. short periods only. Other methods of application must be studied.
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