Kem \u0111\u00e1nh r\u0103ng th\u01b0\u1eddng c\u00f3 h\u1ea1n s\u1eed d\u1ee5ng hai n\u0103m \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o c\u00e1c th\u00e0nh ph\u1ea7n ho\u1ea1t t\u00ednh \u2014 \u0111\u1eb7c bi\u1ec7t l\u00e0 florua \u2014 v\u1eabn c\u00f3 hi\u1ec7u qu\u1ea3 trong vi\u1ec7c ng\u0103n ng\u1eeba s\u00e2u r\u0103ng. Sau giai \u0111o\u1ea1n n\u00e0y, h\u01b0\u01a1ng v\u1ecb v\u00e0 k\u1ebft c\u1ea5u c\u00f3 th\u1ec3 thay \u0111\u1ed5i, v\u00e0 kh\u1ea3 n\u0103ng t\u0103ng c\u01b0\u1eddng men r\u0103ng v\u00e0 ch\u1ed1ng s\u00e2u r\u0103ng c\u1ee7a florua c\u00f3 th\u1ec3 gi\u1ea3m b\u1edbt. Ngay c\u1ea3 nh\u1eefng \u1ed1ng ch\u01b0a m\u1edf c\u0169ng h\u1ebft h\u1ea1n s\u1eed d\u1ee5ng, b\u1edfi v\u00ec ch\u1ea5t b\u1ea3o qu\u1ea3n v\u00e0 ch\u1ea5t \u1ed5n \u0111\u1ecbnh xu\u1ed1ng c\u1ea5p theo th\u1eddi gian . S\u1eed d\u1ee5ng kem \u0111\u00e1nh r\u0103ng h\u1ebft h\u1ea1n s\u1eed d\u1ee5ng kh\u00f4ng c\u00f3 h\u1ea1i, nh\u01b0ng b\u1ea1n c\u00f3 nguy c\u01a1 gi\u1ea3m kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 s\u00e2u r\u0103ng v\u00e0 tr\u1ea3i nghi\u1ec7m \u0111\u00e1nh r\u0103ng k\u00e9m d\u1ec5 ch\u1ecbu h\u01a1n . Sau khi m\u1edf, ti\u1ebfp x\u00fac v\u1edbi kh\u00f4ng kh\u00ed v\u00e0 \u0111\u1ed9 \u1ea9m c\u00f3 th\u1ec3 \u0111\u1ea9y nhanh qu\u00e1 tr\u00ecnh ph\u00e2n h\u1ee7y v\u00e0 th\u1eadm ch\u00ed th\u00fac \u0111\u1ea9y s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a vi sinh v\u1eadt. B\u1ea3o qu\u1ea3n \u0111\u00fang c\u00e1ch \u2014 n\u01a1i kh\u00f4 r\u00e1o, tho\u00e1ng m\u00e1t, tr\u00e1nh \u00e1nh n\u1eafng tr\u1ef1c ti\u1ebfp \u2014 gi\u00fap duy tr\u00ec \u0111\u1ed9 t\u01b0\u01a1i. N\u1ebfu h\u01b0\u01a1ng v\u1ecb m\u1edd d\u1ea7n ho\u1eb7c k\u1ebft c\u1ea5u t\u00e1ch ra, \u0111\u00e3 \u0111\u1ebfn l\u00fac thay \u1ed1ng. Cu\u1ed1i c\u00f9ng, h\u00e3y lu\u00f4n ki\u1ec3m tra ng\u00e0y in v\u00e0 xoay c\u1ed5 phi\u1ebfu c\u1ee7a b\u1ea1n \u0111\u1ec3 tr\u00e1nh b\u1ea5t ng\u1edd trong t\u1ee7. <\/p>\n
M\u1ed7i tu\u00fdp kem \u0111\u00e1nh r\u0103ng \u0111\u1ec1u c\u00f3 ng\u00e0y \u201ch\u1ea1n s\u1eed d\u1ee5ng” ho\u1eb7c \u201ch\u1ebft h\u1ea1n” do nh\u00e0 s\u1ea3n xu\u1ea5t \u0111\u00f3ng d\u1ea5u. Ng\u00e0y n\u00e0y cho bi\u1ebft khi n\u00e0o t\u1ea5t c\u1ea3 c\u00e1c th\u00e0nh ph\u1ea7n \u2014 bao g\u1ed3m c\u1ea3 florua \u2014 d\u1ef1 ki\u1ebfn s\u1ebd ho\u1ea1t \u0111\u1ed9ng \u1edf m\u1ee9c cao nh\u1ea5t. Sau ng\u00e0y n\u00e0y, th\u1eddi h\u1ea1n s\u1eed<\/strong> d\u1ee5ng c\u1ee7a kem \u0111\u00e1nh r\u0103ng gi\u1ea3m khi ch\u1ea5t \u1ed5n \u0111\u1ecbnh v\u00e0 ch\u1ea5t b\u1ea3o qu\u1ea3n m\u1ea5t hi\u1ec7u l\u1ef1c, \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn nh\u1eefng thay \u0111\u1ed5i v\u1ec1 h\u01b0\u01a1ng v\u1ecb, t\u00ednh nh\u1ea5t qu\u00e1n v\u00e0 hi\u1ec7u qu\u1ea3 . <\/p>\n Kem \u0111\u00e1nh r\u0103ng h\u1ebft h\u1ea1n s\u1eed d\u1ee5ng v\u00ec c\u00e1c th\u00e0nh ph\u1ea7n ho\u1ea1t t\u00ednh c\u1ee7a n\u00f3 tr\u1ea3i qua nh\u1eefng thay \u0111\u1ed5i h\u00f3a h\u1ecdc theo th\u1eddi gian. Florua<\/strong>, ch\u1ea5t ch\u1ed1ng s\u00e2u r\u0103ng ch\u00ednh, c\u00f3 th\u1ec3 ph\u00e2n h\u1ee7y, l\u00e0m gi\u1ea3m kh\u1ea3 n\u0103ng t\u00e1i kho\u00e1ng h\u00f3a men r\u0103ng v\u00e0 ng\u0103n ng\u1eeba s\u00e2u r\u0103ng. C\u00e1c th\u00e0nh ph\u1ea7n kh\u00e1c \u2014 ch\u1ea5t gi\u1eef \u1ea9m, ch\u1ea5t k\u1ebft d\u00ednh v\u00e0 ch\u1ea5t ho\u1ea1t \u0111\u1ed9ng b\u1ec1 m\u1eb7t \u2014 c\u00f3 th\u1ec3 t\u00e1ch ho\u1eb7c ph\u00e2n h\u1ee7y, \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn k\u1ebft c\u1ea5u. Theo th\u1eddi gian, h\u01a1i \u1ea9m c\u00f3 th\u1ec3 bay h\u01a1i, l\u00e0m cho b\u1ed9t nh\u00e3o b\u1ecb kh\u00f4 ho\u1eb7c s\u1ea1n. H\u01a1n n\u1eefa, n\u1ebfu kh\u00f4ng c\u00f3 ch\u1ea5t b\u1ea3o qu\u1ea3n \u1edf m\u1ee9c t\u1ed1i \u0111a, \u1ed1ng c\u00f3 th\u1ec3 h\u1ed7 tr\u1ee3 s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a vi sinh v\u1eadt<\/strong>, \u0111i\u1ec1u n\u00e0y g\u00e2y ra nh\u1eefng lo ng\u1ea1i v\u1ec1 v\u1ec7 sinh. <\/p>\n C\u00f3. Ngay c\u1ea3 nh\u1eefng \u1ed1ng ch\u01b0a m\u1edf c\u0169ng c\u00f3 th\u1eddi h\u1ea1n s\u1eed d\u1ee5ng v\u00ec c\u00e1c th\u00e0nh ph\u1ea7n ph\u00e2n h\u1ee7y t\u1ef1 nhi\u00ean trong m\u00f4i tr\u01b0\u1eddng k\u00edn. Ng\u00e0y s\u1ea3n xu\u1ea5t c\u00f3 th\u1ec3 gi\u00fap \u01b0\u1edbc t\u00ednh th\u1eddi h\u1ea1n s\u1eed d\u1ee5ng khi ng\u00e0y in kh\u00f4ng r\u00f5 r\u00e0ng; C\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t th\u01b0\u1eddng b\u1ea3o h\u00e0nh l\u00ean \u0111\u1ebfn hai n\u0103m k\u1ec3 t\u1eeb khi s\u1ea3n xu\u1ea5t. <\/p>\n Th\u1eddi h\u1ea1n <\/p>\n Ch\u01b0a m\u1edf<\/strong>: B\u1ea3o qu\u1ea3n \u1edf n\u01a1i kh\u00f4 r\u00e1o, tho\u00e1ng m\u00e1t. Tr\u00e1nh qu\u00e1 nhi\u1ec7t ho\u1eb7c \u0111\u00f3ng b\u0103ng, c\u00f3 th\u1ec3 l\u00e0m thay \u0111\u1ed5i k\u1ebft c\u1ea5u. <\/em><\/p>\n<\/li>\n \u0110\u00e3 m\u1edf<\/strong>: Sau khi ni\u00eam phong \u1ed1ng b\u1ecb h\u1ecfng, h\u00e3y c\u1ed1 g\u1eafng s\u1eed d\u1ee5ng trong v\u00f2ng 6\u201312 th\u00e1ng \u0111\u1ec3 c\u00f3 \u0111\u1ed9 t\u01b0\u01a1i cao nh\u1ea5t. Lu\u00f4n \u0111\u00f3ng l\u1ea1i \u0111\u1ec3 h\u1ea1n ch\u1ebf s\u1ef1 x\u00e2m nh\u1eadp c\u1ee7a kh\u00f4ng kh\u00ed v\u00e0 h\u01a1i \u1ea9m. <\/em><\/p>\n<\/li>\n<\/ul>\n B\u1ea1n s\u1ebd kh\u00f4ng g\u00e2y h\u1ea1i cho mi\u1ec7ng c\u1ee7a m\u00ecnh b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng kem \u0111\u00e1nh r\u0103ng h\u1ebft h\u1ea1n s\u1eed d\u1ee5ng, nh\u01b0ng b\u1ea1n s\u1ebd t\u1eeb b\u1ecf s\u1ef1 b\u1ea3o v\u1ec7 t\u1ed1i \u01b0u . Kem \u0111\u00e1nh r\u0103ng qu\u00e1 l\u00e2u c\u00f3 th\u1ec3 c\u00f3 v\u1ecb thiu, c\u1ea3m th\u1ea5y s\u1ea1n v\u00e0 thi\u1ebfu m\u1ee9c florua \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb \u0111\u1ec3 duy tr\u00ec men r\u0103ng<\/strong> ch\u1eafc kh\u1ecfe. Trong m\u1ed9t s\u1ed1 tr\u01b0\u1eddng h\u1ee3p hi\u1ebfm hoi, ch\u1ea5t b\u1ea3o qu\u1ea3n b\u1ecb suy y\u1ebfu c\u00f3 th\u1ec3 cho ph\u00e9p vi khu\u1ea9n ph\u00e1t tri\u1ec3n t\u1ed1i thi\u1ec3u, v\u00ec v\u1eady h\u00e3y thay th\u1ebf c\u00e1c \u1ed1ng c\u00f3 n\u1ea5m m\u1ed1c ho\u1eb7c m\u00f9i l\u1ea1. <\/p>\n Ch\u1ea5t l\u01b0\u1ee3ng th\u00e0nh ph\u1ea7n<\/strong>: C\u00e1c th\u01b0\u01a1ng hi\u1ec7u cao c\u1ea5p s\u1eed d\u1ee5ng ch\u1ea5t b\u1ea3o qu\u1ea3n v\u00e0 ch\u1ea5t \u1ed5n \u0111\u1ecbnh m\u1ea1nh m\u1ebd, nh\u01b0ng ngay c\u1ea3 nh\u1eefng ch\u1ea5t n\u00e0y cu\u1ed1i c\u00f9ng c\u0169ng b\u1ecb hao m\u00f2n.<\/p>\n<\/li>\n \u0110i\u1ec1u ki\u1ec7n b\u1ea3o qu\u1ea3n<\/strong>: Nhi\u1ec7t v\u00e0 \u0111\u1ed9 \u1ea9m \u0111\u1ea9y nhanh qu\u00e1 tr\u00ecnh ph\u00e2n h\u1ee7y; B\u1ea3o qu\u1ea3n \u1ed1ng tr\u00e1nh \u00e1nh n\u1eafng tr\u1ef1c ti\u1ebfp.<\/p>\n<\/li>\n T\u1ea7n su\u1ea5t s\u1eed d\u1ee5ng<\/strong>: C\u00e1c \u1ed1ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng h\u00e0ng ng\u00e0y c\u1ea1n ki\u1ec7t nhanh h\u01a1n v\u00e0 c\u00f3 th\u1ec3 b\u1ecb kh\u00f4 xung quanh n\u1eafp n\u1ebfu \u0111\u1ec3 m\u1edf.<\/p>\n<\/li>\n T\u00ednh to\u00e0n v\u1eb9n c\u1ee7a bao b\u00ec<\/strong>: C\u00e1c \u1ed1ng b\u1ecb h\u1ecfng ho\u1eb7c n\u1eafp l\u1ecfng l\u1ebbo khi\u1ebfn n\u1ed9i dung ti\u1ebfp x\u00fac v\u1edbi kh\u00f4ng kh\u00ed v\u00e0 ch\u1ea5t g\u00e2y \u00f4 nhi\u1ec5m.<\/p>\n<\/li>\n<\/ol>\n Gi\u1eef kh\u00f4 r\u00e1o<\/strong>: B\u1ea3o qu\u1ea3n trong t\u1ee7 k\u00edn, kh\u00f4ng ph\u1ea3i ngay b\u00ean c\u1ea1nh b\u1ed3n r\u1eeda \u0111\u1ea7y h\u01a1i n\u01b0\u1edbc.<\/p>\n<\/li>\n Ni\u00eam phong ch\u1eb7t<\/strong>: Lu\u00f4n v\u1eb7n n\u1eafp ho\u00e0n to\u00e0n sau khi \u0111\u00e1nh r\u0103ng.<\/p>\n<\/li>\n Xoay c\u1ed5 phi\u1ebfu<\/strong>: S\u1eed d\u1ee5ng c\u00e1c \u1ed1ng c\u0169 h\u01a1n tr\u01b0\u1edbc khi m\u1edf \u1ed1ng m\u1edbi.<\/p>\n<\/li>\n Ki\u1ec3m tra ng\u00e0y<\/strong>: T\u00ecm ng\u00e0y h\u1ebft h\u1ea1n \u0111\u00e3 in; n\u1ebfu v\u1eafng m\u1eb7t, gi\u1ea3 s\u1eed hai n\u0103m k\u1ec3 t\u1eeb khi mua.<\/p>\n<\/li>\n Ki\u1ec3m tra tr\u01b0\u1edbc khi s\u1eed d\u1ee5ng<\/strong>: V\u1ee9t b\u1ea5t k\u1ef3 \u1ed1ng n\u00e0o c\u00f3 m\u00f9i l\u1ea1 ho\u1eb7c c\u00f3 nh\u1eefng thay \u0111\u1ed5i c\u00f3 th\u1ec3 nh\u00ecn th\u1ea5y \u0111\u01b0\u1ee3c.<\/p>\n<\/li>\n<\/ul>\n C\u00f3\u2014c\u00f4ng th\u1ee9c d\u00e0nh cho th\u00fa c\u01b0ng c\u0169ng c\u00f3 h\u1ea1n s\u1eed d\u1ee5ng. C\u00e1c th\u00e0nh ph\u1ea7n nh\u01b0 enzyme v\u00e0 h\u01b0\u01a1ng li\u1ec7u b\u1ecb ph\u00e2n h\u1ee7y, l\u00e0m gi\u1ea3m s\u1ee9c h\u1ea5p d\u1eabn v\u00e0 hi\u1ec7u qu\u1ea3. Th\u1ef1c hi\u1ec7n theo c\u00f9ng m\u1ed9t h\u01b0\u1edbng d\u1eabn hai n\u0103m v\u00e0 lu\u00f4n ki\u1ec3m tra c\u00e1c khuy\u1ebfn ngh\u1ecb c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t. <\/p>\n Kem \u0111\u00e1nh r\u0103ng t\u1ef1 l\u00e0m thi\u1ebfu ch\u1ea5t b\u1ea3o qu\u1ea3n th\u01b0\u01a1ng m\u1ea1i v\u00e0 th\u01b0\u1eddng c\u00f3 th\u1eddi h\u1ea1n s\u1eed d\u1ee5ng ng\u1eafn h\u01a1n \u2014 \u0111\u00f4i khi ch\u1ec9 v\u00e0i tu\u1ea7n. N\u1ebfu b\u1ea1n t\u1ef1 l\u00e0m, h\u00e3y b\u1ea3o qu\u1ea3n trong h\u1ed9p k\u00edn v\u00e0 \u0111\u1ec3 trong t\u1ee7 l\u1ea1nh khi c\u00f3 th\u1ec3. <\/p>\n Q1: Kem \u0111\u00e1nh r\u0103ng c\u00f3 th\u1ef1c s\u1ef1 h\u1ebft h\u1ea1n s\u1eed d\u1ee5ng?<\/strong> Q2: Khi n\u00e0o kem \u0111\u00e1nh r\u0103ng h\u1ebft h\u1ea1n s\u1eed d\u1ee5ng?<\/strong> Q3: Kem \u0111\u00e1nh r\u0103ng ch\u01b0a m\u1edf c\u00f3 h\u1ebft h\u1ea1n s\u1eed d\u1ee5ng kh\u00f4ng?<\/strong> Q4: Kem \u0111\u00e1nh r\u0103ng c\u00f3 h\u1ebft h\u1ea1n s\u1eed d\u1ee5ng sau khi m\u1edf kh\u00f4ng?<\/strong> Q5: T\u1ea1i sao kem \u0111\u00e1nh r\u0103ng h\u1ebft h\u1ea1n s\u1eed d\u1ee5ng?<\/strong> T\u00e0i nguy\u00ean h\u1ecdc thu\u1eadt \u0111\u1ec3 \u0111\u1ecdc th\u00eam:<\/em><\/p>\n Florua:<\/strong> T\u00ecm hi\u1ec3u v\u1ec1 l\u1ee3i \u00edch c\u1ee7a florua t\u1ea1i Hi\u1ec7p h\u1ed9i Nha khoa Hoa K\u1ef3<\/a><\/p>\n<\/li>\n S\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a vi sinh v\u1eadt:<\/strong> T\u00ecm hi\u1ec3u v\u1ec1 ph\u00f2ng ch\u1ed1ng s\u00e2u r\u0103ng t\u1ea1i Trung t\u00e2m Ki\u1ec3m so\u00e1t v\u00e0 Ph\u00f2ng ng\u1eeba D\u1ecbch b\u1ec7nh<\/a><\/p>\n<\/li>\n Th\u1eddi h\u1ea1n s\u1eed d\u1ee5ng:<\/strong> H\u01b0\u1edbng d\u1eabn c\u1ee7a FDA v\u1ec1 th\u1eddi h\u1ea1n s\u1eed d\u1ee5ng s\u1ea3n ph\u1ea9m t\u1ea1i C\u1ee5c Qu\u1ea3n l\u00fd Th\u1ef1c ph\u1ea9m v\u00e0 D\u01b0\u1ee3c ph\u1ea9m Hoa K\u1ef3<\/a><\/p>\n<\/li>\n S\u1ee9c kh\u1ecfe r\u0103ng mi\u1ec7ng:<\/strong> C\u00e1c s\u00e1ng ki\u1ebfn s\u1ee9c kh\u1ecfe r\u0103ng mi\u1ec7ng to\u00e0n c\u1ea7u t\u1ea1i T\u1ed5 ch\u1ee9c Y t\u1ebf Th\u1ebf gi\u1edbi<\/a><\/p>\n<\/li>\nT\u1ea1i sao kem \u0111\u00e1nh r\u0103ng h\u1ebft h\u1ea1n s\u1eed d\u1ee5ng?<\/h3>\n
Kem \u0111\u00e1nh r\u0103ng c\u00f3 h\u1ebft h\u1ea1n s\u1eed d\u1ee5ng n\u1ebfu kh\u00f4ng m\u1edf kh\u00f4ng?<\/h3>\n
Th\u1eddi h\u1ea1n s\u1eed d\u1ee5ng: Ch\u01b0a m\u1edf so v\u1edbi \u0111\u00e3 m\u1edf<\/h2>\n
\n\n
\n \n\u0110i\u1ec1u ki\u1ec7n<\/th>\n s\u1eed d\u1ee5ng \u0111i\u1ec3n h\u00ecnh<\/th>\n M\u1ed1i quan t\u00e2m ch\u00ednh<\/th>\n<\/tr>\n<\/thead>\n \n\u1ed0ng <\/p>\n ch\u01b0a m\u1edf<\/td>\n L\u00ean \u0111\u1ebfn 2 n\u0103m t\u1eeb Mfg.<\/td>\n Ph\u00e2n h\u1ee7y th\u00e0nh ph\u1ea7n, ni\u00eam phong bao b\u00ec<\/td>\n<\/tr>\n \n \u1ed0ng m\u1edf<\/td>\n X\u1ea5p x\u1ec9 6\u201312 th\u00e1ng <\/td>\n Ti\u1ebfp x\u00fac v\u1edbi kh\u00f4ng kh\u00ed, \u0111\u1ed9 \u1ea9m, nguy c\u01a1 vi sinh v\u1eadt<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n \n
An to\u00e0n khi s\u1eed d\u1ee5ng kem \u0111\u00e1nh r\u0103ng h\u1ebft h\u1ea1n s\u1eed d\u1ee5ng<\/h2>\n
C\u00e1c y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn tu\u1ed5i th\u1ecd c\u1ee7a kem \u0111\u00e1nh r\u0103ng<\/h2>\n
\n
C\u00e1c ph\u01b0\u01a1ng ph\u00e1p hay nh\u1ea5t \u0111\u1ec3 l\u01b0u tr\u1eef v\u00e0 s\u1eed d\u1ee5ng<\/h2>\n
\n
C\u00e2n nh\u1eafc \u0111\u1eb7c bi\u1ec7t<\/h2>\n
Kem \u0111\u00e1nh r\u0103ng cho ch\u00f3 c\u00f3 h\u1ebft h\u1ea1n s\u1eed d\u1ee5ng kh\u00f4ng?<\/h3>\n
Kem \u0111\u00e1nh r\u0103ng t\u1ef1 ch\u1ebf<\/h3>\n
H\u1ecfi & \u0110\u00e1p<\/h2>\n
A: V\u00e2ng. C\u00e1c th\u00e0nh ph\u1ea7n ho\u1ea1t t\u00ednh b\u1ecb ph\u00e2n h\u1ee7y theo th\u1eddi gian, l\u00e0m gi\u1ea3m hi\u1ec7u qu\u1ea3 v\u00e0 h\u01b0\u01a1ng v\u1ecb. <\/p>\n
A: Th\u00f4ng th\u01b0\u1eddng hai n\u0103m sau khi s\u1ea3n xu\u1ea5t ho\u1eb7c theo ng\u00e0y in tr\u00ean \u1ed1ng.<\/p>\n
A: C\u00f3, ngay c\u1ea3 c\u00e1c \u1ed1ng k\u00edn c\u0169ng h\u1ebft h\u1ea1n s\u1eed d\u1ee5ng do thay \u0111\u1ed5i h\u00f3a h\u1ecdc t\u1ef1 nhi\u00ean.<\/p>\n
A: S\u1eed d\u1ee5ng t\u1ed1t nh\u1ea5t trong v\u00f2ng 6\u201312 th\u00e1ng sau khi m\u1edf \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 t\u01b0\u01a1i v\u00e0 hi\u1ec7u l\u1ef1c.<\/p>\n
A: C\u00e1c th\u00e0nh ph\u1ea7n nh\u01b0 florua b\u1ecb ph\u00e1 v\u1ee1, ch\u1ea5t b\u1ea3o qu\u1ea3n y\u1ebfu \u0111i v\u00e0 k\u1ebft c\u1ea5u c\u00f3 th\u1ec3 t\u00e1ch ra.<\/p>\n\n