{"title":"在早期和老年牙结石和阻龋牙釉质中观察到六角形盘状晶体","authors":"T. Kodaka, Y. Ohara","doi":"10.11516/DENTALMEDRES1981.13.375","DOIUrl":null,"url":null,"abstract":"Hexagonal disk-shaped crystals were found in caries-arrested enamel as well as in early and old dental calculi with scanning electron microscopy. The crystals which were constructed with wafer-like laminations linked together, formed rosette-like structures, or aggregated with each other. The main components were calcium phosphate with a small amount of Mg under energy-dispersive X-ray microanalysis. The crystals were frequently coexistent with Mg-containing whitlockite (WH) while no WH crystals were observed in the early calculus; thereby, the pH range of the formation sites might be lower than that of WH crystals.","PeriodicalId":77624,"journal":{"name":"Showa Shigakkai zasshi = The Journal of Showa University Dental Society","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"1993-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":"{\"title\":\"Hexagonal Disk-Shaped Crystals Observed in Early and Old Dental Calculi and Caries-Arrested Enamel\",\"authors\":\"T. Kodaka, Y. Ohara\",\"doi\":\"10.11516/DENTALMEDRES1981.13.375\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Hexagonal disk-shaped crystals were found in caries-arrested enamel as well as in early and old dental calculi with scanning electron microscopy. The crystals which were constructed with wafer-like laminations linked together, formed rosette-like structures, or aggregated with each other. The main components were calcium phosphate with a small amount of Mg under energy-dispersive X-ray microanalysis. The crystals were frequently coexistent with Mg-containing whitlockite (WH) while no WH crystals were observed in the early calculus; thereby, the pH range of the formation sites might be lower than that of WH crystals.\",\"PeriodicalId\":77624,\"journal\":{\"name\":\"Showa Shigakkai zasshi = The Journal of Showa University Dental Society\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1993-12-31\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Showa Shigakkai zasshi = The Journal of Showa University Dental Society\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.11516/DENTALMEDRES1981.13.375\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Showa Shigakkai zasshi = The Journal of Showa University Dental Society","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.11516/DENTALMEDRES1981.13.375","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Hexagonal Disk-Shaped Crystals Observed in Early and Old Dental Calculi and Caries-Arrested Enamel
Hexagonal disk-shaped crystals were found in caries-arrested enamel as well as in early and old dental calculi with scanning electron microscopy. The crystals which were constructed with wafer-like laminations linked together, formed rosette-like structures, or aggregated with each other. The main components were calcium phosphate with a small amount of Mg under energy-dispersive X-ray microanalysis. The crystals were frequently coexistent with Mg-containing whitlockite (WH) while no WH crystals were observed in the early calculus; thereby, the pH range of the formation sites might be lower than that of WH crystals.
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