\u7834\u6298\u6b6f\u683936\u672c\u3092\u7d44\u7e54\u5b66\u7684\u306b\u89b3\u5bdf\u3057\u305f\u6587\u732e\u3067\u3059\u3002the University of Iowa College of Dentistry \u306e\u6b6f\u5185\u7642\u6cd5\u5b66\u6559\u5ba4\u306e Richard E. Walton\u5148\u751f\u306b\u3088\u308b1984\u5e74\u306e\u5831\u544a\u3067\u3001\u7834\u6298\u6b6f\u6839\u6cbb\u7642\u306b\u95a2\u3059\u308b\u591a\u304f\u306e\u6587\u732e\u3067\u5f15\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u6587\u732e\u5185\u306e\u8981\u7d04\u3068\u7d50\u8ad6\u3092\u307e\u3068\u3081\u308b\u3068\u3001\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002\u7834\u6298\u7a7a\u9699\u306b\u6d78\u51fa\u3059\u308b\u7d44\u7e54\u6db2\u304c\u5206\u89e3\u3057\u3066\u523a\u6fc0\u7269\u306b\u306a\u308a\u5f97\u308b\u53ef\u80fd\u6027\u306b\u3064\u3044\u3066\u89e6\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u8981\u7d04\u3068\u7d50\u8ad6\u00a0<\/span><\/p>\n \u5782\u76f4\u6b6f\u6839\u7834\u6298\u3092\u4f34\u3046\u629c\u6b6f\u6b6f\u6839\u3092\u7d44\u7e54\u5b66\u7684\u306b\u691c\u67fb\u3057\u305f\u3002\u30d8\u30de\u30c8\u30ad\u30b7\u30ea\u30f3\u3068\u30a8\u30aa\u30b7\u30f3\u3001\u7d30\u83cc\u67d3\u8272\u3001\u304a\u3088\u3073\u7d30\u7db2\u67d3\u8272\u3092\u4f7f\u7528\u3057\u3066\u3001\u7834\u6298\u306e\u5f62\u614b\u5b66\u7684\u30d1\u30bf\u30fc\u30f3\u3001\u95a2\u9023\u3059\u308b\u8edf\u7d44\u7e54\u306e\u72b6\u614b\u3092\u7814\u7a76\u3057\u3001\u6f5c\u5728\u7684\u306a\u523a\u6fc0\u7269\u8cea\u3092\u7279\u5b9a\u3057\u305f\u3002\u30b5\u30f3\u30d7\u30eb\u306b\u306f 36 \u500b\u306e\u6b6f\u6839\u304c\u542b\u307e\u308c\u3066\u3044\u305f\u3002\u4ee5\u4e0b\u306e\u89b3\u5bdf\u3068\u7d50\u8ad6\u304c\u5f97\u3089\u308c\u305f\u3002\u00a0<\/span><\/p>\n 1.\u7834\u6298\u306e\u5927\u90e8\u5206\u306f\u3001\u6839\u5468\u56f2\u8868\u9762\u304b\u3089\u53cd\u5bfe\u5074\u306e\u6b6f\u6839\u8868\u9762\u307e\u3067\u4f38\u3073\u305f\u5b8c\u5168\u7834\u6298\u3067\u3042\u308a\u3001\u5c11\u306a\u304f\u3068\u3082 1 \u3064\u307e\u305f\u306f\u8907\u6570\u306e\u6839\u7ba1\u3092\u542b\u3093\u3067\u3044\u305f\u3002\u3044\u304f\u3064\u304b\u306e\u6a19\u672c\u306b\u306f\u4e0d\u5b8c\u5168\u306a\u7834\u6298\u304c\u898b\u3089\u308c\u305f\u3002\u00a0<\/span><\/p>\n 2. \u7d30\u83cc\u306f\u307b\u3068\u3093\u3069\u306e\u7834\u6298\u7a7a\u9699\u3067\u8a8d\u3081\u3089\u308c\u305f\u3002\u5834\u5408\u306b\u3088\u3063\u3066\u306f\u9023\u7d61\u6839\u7ba1\u5185\u3001\u304a\u3088\u3073\u591a\u304f\u306e\u5834\u5408\u4e8c\u6b21\u7834\u6298\u7dda\u306e\u4e2d\u304a\u3088\u3073\/\u307e\u305f\u306f\u8c61\u7259\u7d30\u7ba1\u5185\u3067\u78ba\u8a8d\u3055\u308c\u305f\u3002\u00a0<\/span><\/p>\n 3. \u7834\u6298\u90e8\u3068\u9023\u7d9a\u3059\u308b\u6839\u7ba1\u306b\u306f\u3001\u98df\u7269\u306e\u7834\u7247\u3001\u30b7\u30fc\u30e9\u30fc\u3001\u58ca\u6b7b\u7d44\u7e54\u3001\u7d30\u83cc\u3001\u7279\u5b9a\u3067\u304d\u306a\u3044\u975e\u7d50\u6676\u7269\u8cea\u306a\u3069\u306e\u523a\u6fc0\u7269\u306b\u306a\u308a\u5f97\u308b\u7269\u8cea\u304c\u542b\u307e\u308c\u3066\u3044\u308b\u3053\u3068\u304c\u3088\u304f\u3042\u3063\u305f\u3002\u00a0<\/span><\/p>\n 4. \u7834\u6298\u306b\u96a3\u63a5\u3059\u308b\u6b6f\u6839\u8868\u9762\u306e\u8edf\u7d44\u7e54\u306f\u5e38\u306b\u708e\u75c7\u3092\u793a\u3057\u305f\u3002\u7834\u6298\u7a7a\u9699\u3078\u306e\u7d50\u5408\u7d44\u7e54\u306e\u5185\u90e8\u6210\u9577\u304c\u983b\u7e41\u306b\u89b3\u5bdf\u3055\u308c\u3001\u3057\u3070\u3057\u3070\u7834\u6298\u306e\u5168\u9577\u306b\u6cbf\u3063\u3066\u898b\u3089\u308c\u305f\u3002\u7834\u6298\u7a7a\u9699\u306e\u9732\u51fa\u3057\u305f\u8c61\u7259\u8cea\u306f\u3001\u30bb\u30e1\u30f3\u30c8\u8cea\u69d8\u786c\u7d44\u7e54\u306b\u8986\u308f\u308c\u308b\u3053\u3068\u3082\u3042\u3063\u305f\u3002<\/p>\n \u7834\u6298\u7dda\u306f\u3001\u523a\u6fc0\u7269\u3092\u53e3\u8154\u304b\u3089\u7834\u6298\u7a7a\u9699\u3078\u3001\u304a\u3088\u3073\u6839\u7ba1\u304b\u3089\u96a3\u63a5\u7d44\u7e54\u3078\u306e\u958b\u3044\u305f\u7d4c\u8def\u3092\u5f62\u6210\u3057\u3066\u3044\u308b\u3088\u3046\u3060\u3063\u305f\u3002\u7834\u6298\u304c\u5e83\u7bc4\u56f2\u306b\u308f\u305f\u308b\u305f\u3081\u3001\u523a\u6fc0\u7269\u306f\u53cd\u5fdc\u6027\u6b6f\u6839\u819c\u306b\u5bb9\u6613\u304b\u3064\u5e83\u7bc4\u56f2\u306b\u5230\u9054\u3057\u3066\u3044\u305f\u3002<\/p>\n <\/p>\n SUMMARY AND CONCLUSIONS<\/p>\n Extracted roots with vertical root fractures were ex- amined histologically. Hematoxylin and eosin, bacterial stains, and reticulum stain were used to study morpho- logical patterns of the fracture, the status of associated soft tissues, and to identify potential irritants. The sam- ple included 36 roots. The following observations and conclusions were made:<\/p>\n 1. The majority of fractures were complete in that they extended from a peripheral surface to the opposite surface and included at least a canal or canals. A few specimens showed incomplete frac- tures.<\/p>\n 2. Bacteria were demonstrated in most fracture spaces, occasionally in communicating canals, and often in secondary fractures and\/or tubules.<\/p>\n 3. Canals that were continuous with the fractures often contained potential irritants such as food debris, sealer, necrotic tissue, bacteria, and uni- dentifiable amorphous substances.<\/p>\n 4. Soft tissue on the root surface adjacent to the fracture always demonstrated inflammation. Tis- sue ingrowth was frequently observed in the frac- ture space and would often be seen along its entire length. Exposed dentin in the fracture spaces was occasionally overlayed by cementum- like hard tissue.<\/p>\n The fracture line appears to form an open pathway for irritants from the oral cavity and from the canal space to adjacent tissues. Because the fracture is extensive, the irritants have easy and extensive access to the reactive periodontium.<\/p>\n \u8aa4\u7ffb\u8a33\u306b\u304a\u6c17\u3065\u304d\u306e\u969b\u306f\u3001\u3054\u4e00\u5831\u3044\u305f\u3060\u3051\u307e\u3057\u305f\u3089\u5e78\u3044\u3067\u3059\u3002<\/p>\n \u6587\u8cac\u3000\u771e\u5742\u3053\u3065\u3048<\/p>\n <\/p>\n","protected":false},"excerpt":{"rendered":"\u7834\u6298\u6b6f\u683936\u672c\u3092\u7d44\u7e54\u5b66\u7684\u306b\u89b3\u5bdf\u3057\u305f\u6587\u732e\u3067\u3059\u3002the University of Iowa College of Dentistry \u306e\u6b6f\u5185\u7642\u6cd5\u5b66\u6559\u5ba4\u306e Richard E. Walton\u5148\u751f\u306b\u3088\u308b1984\u5e74\u306e\u5831\u544a\u3067\u3001\u7834\u6298 …","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12],"tags":[14,15,16,17,18],"class_list":["post-668","post","type-post","status-publish","format-standard","hentry","category-12","tag-14","tag-15","tag-16","tag-17","tag-18"],"_links":{"self":[{"href":"https:\/\/www.pdm21.com\/doctor\/wp-json\/wp\/v2\/posts\/668","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.pdm21.com\/doctor\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.pdm21.com\/doctor\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.pdm21.com\/doctor\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.pdm21.com\/doctor\/wp-json\/wp\/v2\/comments?post=668"}],"version-history":[{"count":1,"href":"https:\/\/www.pdm21.com\/doctor\/wp-json\/wp\/v2\/posts\/668\/revisions"}],"predecessor-version":[{"id":669,"href":"https:\/\/www.pdm21.com\/doctor\/wp-json\/wp\/v2\/posts\/668\/revisions\/669"}],"wp:attachment":[{"href":"https:\/\/www.pdm21.com\/doctor\/wp-json\/wp\/v2\/media?parent=668"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.pdm21.com\/doctor\/wp-json\/wp\/v2\/categories?post=668"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.pdm21.com\/doctor\/wp-json\/wp\/v2\/tags?post=668"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}