Huang S, Nakagaki H, Okumura H, Hayashizaki J, Negoro M, Adachi K, Tsuge S, Ando S, Robinson C, Pearce E, Huang A, Nguyen T T
Department of Preventive Dentistry and Dental Public Health, School of Dentistry, Aichi-Gakuin University, Nagoya, Japan.
Arch Oral Biol. 1997 Oct-Nov;42(10-11):665-71. doi: 10.1016/s0003-9969(97)00084-8.
Whether the fluoride concentrations and profiles differ in human dental calculus obtained from different countries was investigated. A total of 203 dental calculus deposits on 203 permanent teeth from residents (mean age, 52.1 years) of Nagoya (Japan), Shanghai (China), Leeds (Great Britain) and the Wuhan mountainous area (China, fluoridated area) were analysed. An abrasive microsampling procedure was used to examine fluoride distribution. There were five types of fluoride profiles in dental calculus in each area/country (designated types L, J, U, T, W). In supragingival calculus, type L (highest in the outermost layers) and type J (highest in the innermost layers) both had significantly higher values than type U (high in the surface and innermost layers) but were relatively identical. In subgingival calculus, type W (high in the outermost, mid and innermost layers) was characteristics. Calculus from the Wuhan mountainous area (fluoridated) had the highest fluoride concentration, followed by Leeds (non-fluoridated), and Nagoya and Shanghai (non-fluoridated) calculus had the lowest. Fluoride concentrations in supragingival calculus were higher in teeth extracted because of periodontal diseases than dental caries. It is concluded that fluoride concentrations and distribution in dental calculus differ from country to country, probably due to different fluoride environments.
研究了来自不同国家的人类牙结石中氟化物浓度和分布情况是否存在差异。对来自日本名古屋、中国上海、英国利兹以及中国武汉山区（氟化物防治地区）的居民（平均年龄52.1岁）的203颗恒牙上的203份牙结石沉积物进行了分析。采用研磨微取样程序检测氟化物分布。每个地区/国家的牙结石中有五种氟化物分布类型（分别命名为L型、J型、U型、T型、W型）。在龈上牙结石中，L型（最外层含量最高）和J型（最内层含量最高）的值均显著高于U型（表面和最内层含量高），但二者相对接近。在龈下牙结石中，W型（最外层、中层和最内层含量高）较为典型。来自武汉山区（氟化物防治地区）的牙结石氟化物浓度最高，其次是利兹（非氟化物防治地区），名古屋和上海（非氟化物防治地区）的牙结石氟化物浓度最低。因牙周疾病拔除的牙齿龈上牙结石中的氟化物浓度高于因龋齿拔除的牙齿。研究得出结论，牙结石中的氟化物浓度和分布因国家而异，这可能是由于不同的氟化物环境所致。
