“\u0110\u1ec3 \u0111\u1ec1 ph\u00f2ng s\u00e2u r\u0103ng, ch\u1ec9 \u0111\u00e1nh r\u0103ng nhi\u1ec1u l\u1ea7n th\u1eadt s\u1ea1ch b\u1eb1ng b\u00e0n ch\u1ea3i m\u00e0 kh\u00f4ng c\u1ea7n kem \u0111\u00e1nh r\u0103ng, c\u00f3 \u0111\u01b0\u1ee3c kh\u00f4ng? T\u1ea1i sao l\u1ea1i ph\u1ea3i pha ch\u1ea5t fluor v\u00e0o kem \u0111\u00e1nh r\u0103ng?”.<\/p>\n\n\n\n
\u0110\u00e1nh r\u0103ng ngay sau m\u1ed7i b\u1eefa \u0103n ho\u1eb7c \u0111\u00e1nh r\u0103ng v\u00e0o bu\u1ed5i s\u00e1ng v\u00e0 t\u1ed1i \u0111\u1ec1u r\u1ea5t t\u1ed1t. \u0110\u1ed9ng t\u00e1c n\u00e0y ng\u0103n th\u1ee9c \u0103n c\u00f2n s\u00f3t t\u1ea1o th\u00e0nh m\u1ed9t m\u00e0ng m\u1ecfng tr\u00ean r\u0103ng, l\u00e0m m\u00f4i tr\u01b0\u1eddng ph\u00e1t tri\u1ec3n c\u1ee7a vi khu\u1ea9n. H\u01a1n n\u1eefa, trong khi ta ng\u1ee7, do kh\u00f4ng c\u00f3 \u0111\u1ed9ng t\u00e1c nh\u1ed5 ra ho\u1eb7c nu\u1ed1t n\u01b0\u1edbc b\u1ecdt xu\u1ed1ng ru\u1ed9t n\u00ean vi khu\u1ea9n c\u00f3 \u0111i\u1ec1u ki\u1ec7n t\u1eadp trung h\u01a1n (\u0111\u00e2y l\u00e0 l\u00fd do t\u1ea1i sao ph\u1ea3i \u0111\u00e1nh r\u0103ng tr\u01b0\u1edbc khi \u0111i ng\u1ee7). Vi\u1ec7c \u0111\u00e1nh r\u0103ng \u0111\u1ec1u \u0111\u1eb7n c\u0169ng gi\u00fap ng\u0103n ch\u1eb7n s\u1ef1 h\u00ecnh th\u00e0nh cao r\u0103ng, tr\u00e1nh g\u00e2y t\u1ed5n th\u01b0\u01a1ng cho l\u1ee3i.<\/p>\n\n\n\n
Kem \u0111\u00e1nh r\u0103ng gi\u00fap cho vi\u1ec7c “k\u00ec c\u1ecd” n\u00e0y h\u1eefu hi\u1ec7u h\u01a1n. Tr\u01b0\u1edbc \u0111\u00e2y, ng\u01b0\u1eddi ta cho r\u1eb1ng n\u1ebfu \u0111\u00e1nh r\u0103ng th\u1eadt t\u1ec9 m\u1ec9 th\u00ec kh\u00f4ng c\u1ea7n kem \u0111\u00e1nh r\u0103ng n\u1eefa. L\u00fac \u0111\u00f3, t\u00e1c d\u1ee5ng b\u1ea3o v\u1ec7 r\u0103ng tuy\u1ec7t v\u1eddi c\u1ee7a ch\u1ea5t fluor ch\u01b0a \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n; ch\u1ea5t n\u00e0y c\u0169ng ch\u01b0a \u0111\u01b0\u1ee3c tr\u1ed9n v\u00e0o kem \u0111\u00e1nh r\u0103ng nh\u01b0 hi\u1ec7n nay. Fluor l\u00e0 ch\u1ea5t duy nh\u1ea5t c\u00f3 kh\u1ea3 n\u0103ng l\u00e0m cho men r\u0103ng (l\u1edbp ngo\u00e0i c\u00f9ng, ph\u1ee7 l\u00ean ng\u00e0 r\u0103ng) kh\u00f4ng b\u1ecb h\u00f2a tan trong m\u00f4i tr\u01b0\u1eddng axit. Men r\u0103ng l\u00e0 ch\u1ea5t c\u1ee9ng nh\u1ea5t c\u1ee7a c\u01a1 th\u1ec3, ch\u1ee7 y\u1ebfu g\u1ed3m c\u00e1c apatite. Fluor khi ng\u1ea5m v\u00e0o men r\u0103ng s\u1ebd bi\u1ebfn c\u00e1c apatite th\u00e0nh fluoroapatite, l\u00e0m cho men r\u0103ng c\u1ee9ng th\u00eam.<\/p>\n\n\n\n
M\u1edbi \u0111\u00e2y, c\u00e1c nha s\u0129 c\u1ee7a Anh \u0111\u00e3 s\u00e1ng t\u1ea1o m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p m\u1edbi ng\u1eeba s\u00e2u r\u0103ng: d\u00f9ng m\u1ed9t vi\u00ean nh\u1ecf b\u1eb1ng h\u1ea1t g\u1ea1o g\u1eafn v\u00e0o m\u1ed9t r\u0103ng h\u00e0m c\u1ee7a tr\u1ebb; vi\u00ean n\u00e0y th\u01b0\u1eddng xuy\u00ean gi\u1ea3i ph\u00f3ng ch\u1ea5t fluor trong hai n\u0103m li\u1ec1n, k\u1ebft qu\u1ea3 l\u00e0 t\u1ef7 l\u1ec7 s\u00e2u r\u0103ng gi\u1ea3m 76%.<\/p>\n\n\n\n
C\u00e1c b\u1ea1n n\u00ean nh\u1eafc nh\u1edf v\u00e0 ki\u1ec3m tra con em trong nh\u00e0, k\u1ec3 c\u1ea3 c\u00e1c ch\u00e1u nh\u1ecf ch\u1ec9 m\u1edbi c\u00f3 r\u0103ng s\u1eefa, \u0111\u00e1nh r\u0103ng th\u1eadt k\u1ef9, nh\u1ea5t l\u00e0 bu\u1ed5i t\u1ed1i, v\u00e0 ch\u1ec9 d\u00f9ng kem \u0111\u00e1nh r\u0103ng c\u00f3 fluor.<\/p>\n","protected":false},"excerpt":{"rendered":"
“\u0110\u1ec3 \u0111\u1ec1 ph\u00f2ng s\u00e2u r\u0103ng, ch\u1ec9 \u0111\u00e1nh r\u0103ng nhi\u1ec1u l\u1ea7n th\u1eadt s\u1ea1ch b\u1eb1ng b\u00e0n ch\u1ea3i m\u00e0 kh\u00f4ng c\u1ea7n kem \u0111\u00e1nh r\u0103ng, c\u00f3 \u0111\u01b0\u1ee3c kh\u00f4ng? T\u1ea1i sao l\u1ea1i ph\u1ea3i pha ch\u1ea5t fluor v\u00e0o kem \u0111\u00e1nh r\u0103ng?”. \u0110\u00e1nh r\u0103ng ngay sau m\u1ed7i b\u1eefa \u0103n ho\u1eb7c \u0111\u00e1nh r\u0103ng v\u00e0o bu\u1ed5i s\u00e1ng v\u00e0 t\u1ed1i \u0111\u1ec1u r\u1ea5t t\u1ed1t. \u0110\u1ed9ng t\u00e1c […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[21],"tags":[],"class_list":["post-11761","post","type-post","status-publish","format-standard","hentry","category-y-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/11761","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=11761"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/11761\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=11761"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=11761"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=11761"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}