{"id":33606,"date":"2023-05-13T09:43:09","date_gmt":"2023-05-13T02:43:09","guid":{"rendered":"http:\/\/noithathoaphat.in\/ctv\/?p=33606"},"modified":"2023-05-13T23:01:00","modified_gmt":"2023-05-13T16:01:00","slug":"su-sap-xep-cung-rang-theo-binh-dien-dung-trong-chinh-nha","status":"publish","type":"post","link":"http:\/\/noithathoaphat.in\/ctv\/index.php\/2023\/05\/13\/su-sap-xep-cung-rang-theo-binh-dien-dung-trong-chinh-nha\/","title":{"rendered":"S\u1ef1 s\u1eafp x\u1ebfp cung r\u0103ng theo b\u00ecnh di\u1ec7n \u0111\u1ee9ng trong Ch\u1ec9nh nha."},"content":{"rendered":"

Tr\u00ean cung h\u00e0m, c\u00e1c r\u0103ng \u0111\u01b0\u1ee3c s\u1eafp x\u1ebfp sao cho t\u1ed1i \u0111a h\u00f3a l\u1ef1c nhai v\u00e0 b\u1ea3o v\u1ec7 v\u1ecb tr\u00ed c\u1ee7a ch\u00fang. \u0110\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c hi\u1ec7u qu\u1ea3 nhai t\u1ed1t nh\u1ea5t v\u00e0 gi\u1ea3m thi\u1ec3u s\u1ef1 m\u00e0i m\u00f2n, c\u00e1c r\u0103ng \u0111\u01b0\u1ee3c x\u1ebfp theo h\u01b0\u1edbng tr\u1ee5c r\u0103ng song song v\u1edbi h\u01b0\u1edbng l\u1ef1c nhai v\u00e0 m\u1eb7t nhai vu\u00f4ng g\u00f3c v\u1edbi h\u01b0\u1edbng l\u1ef1c nhai trong ba chi\u1ec1u kh\u00f4ng gian. Ngo\u00e0i ra, h\u1ec7 th\u1ed1ng th\u1ea7n kinh c\u01a1 ph\u1ea3n h\u1ed3i \u0111\u1ec3 \u0111i\u1ec1u ch\u1ec9nh ho\u1ea1t \u0111\u1ed9ng nhai. H\u1ec7 th\u1ed1ng n\u00e0y ch\u1ec9 k\u00edch ho\u1ea1t c\u00e1c c\u01a1 c\u1ea7n thi\u1ebft cho t\u1eebng lo\u1ea1i ho\u1ea1t \u0111\u1ed9ng nhai, \u0111\u00e1p \u1ee9ng nhu c\u1ea7u th\u1ef1c hi\u1ec7n ch\u1ee9c n\u0103ng nhai c\u1ee7a c\u01a1 th\u1ec3 m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 v\u00e0 \u0111\u1ed3ng th\u1eddi gi\u00fap t\u1ed1i \u01b0u h\u00f3a l\u1ef1c nhai v\u00e0 t\u1ef1 b\u1ea3o v\u1ec7 cho c\u00e1c r\u0103ng. C\u00f9ng t\u00ecm hi\u1ec3u v\u1ec1 s\u1ef1 s\u1eafp x\u1ebfp c\u00e1c r\u0103ng theo b\u00ecnh di\u1ec7n \u0111\u1ee9ng trong qu\u00e1 tr\u00ecnh \u0111i\u1ec1u tr\u1ecb ch\u1ec9nh nha l\u00e2m s\u00e0ng tr\u00ean b\u1ec7nh nh\u00e2n.<\/strong><\/p>\n

1. T\u1ed5ng quan v\u1ec1 s\u1ef1 s\u1eafp x\u1ebfp r\u0103ng theo b\u00ecnh di\u1ec7n \u0111\u1ee9ng (vertical alignment)<\/h2>\n

C\u00e1c r\u0103ng \u0111\u01b0\u1ee3c s\u1eafp x\u1ebfp tr\u00ean cung h\u00e0m v\u1edbi m\u1ee5c \u0111\u00edch t\u1ed1i \u0111a h\u00f3a l\u1ef1c nhai v\u00e0 \u0111\u1ea3m b\u1ea3o v\u1ecb tr\u00ed c\u1ee7a ch\u00fang. C\u00e1c r\u0103ng \u0111\u01b0\u1ee3c x\u1ebfp theo h\u01b0\u1edbng tr\u1ee5c r\u0103ng song song v\u1edbi h\u01b0\u1edbng l\u1ef1c nhai v\u00e0 m\u1eb7t nhai vu\u00f4ng g\u00f3c v\u1edbi h\u01b0\u1edbng l\u1ef1c nhai trong ba chi\u1ec1u kh\u00f4ng gian \u0111\u1ec3 gi\u1ea3m thi\u1ec3u s\u1ef1 m\u00e0i m\u00f2n v\u00e0 t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t nhai. H\u1ec7 th\u1ed1ng th\u1ea7n kinh c\u01a1 ph\u1ea3n h\u1ed3i \u0111\u1ec3 \u0111i\u1ec1u ch\u1ec9nh ho\u1ea1t \u0111\u1ed9ng nhai, v\u1edbi s\u1ed1 l\u01b0\u1ee3ng c\u01a1 k\u00edch ho\u1ea1t ch\u1ec9 v\u1eeba \u0111\u1ee7 cho t\u1eebng lo\u1ea1i ho\u1ea1t \u0111\u1ed9ng nhai. C\u00e1c th\u1ee5 th\u1ec3 nh\u1eadn c\u1ea3m \u00e1p l\u1ef1c trong m\u00f4 nha chu ch\u1ecbu tr\u00e1ch nhi\u1ec7m ph\u1ea3n h\u1ed3i nhu c\u1ea7u n\u00e0y. V\u00ed d\u1ee5, trong ho\u1ea1t \u0111\u1ed9ng c\u1eaft th\u1ee9c \u0103n \u1edf r\u0103ng tr\u01b0\u1edbc, s\u1ed1 l\u01b0\u1ee3ng c\u01a1 nhai ho\u1ea1t \u0111\u1ed9ng c\u1ea7n \u00edt h\u01a1n so v\u1edbi ho\u1ea1t \u0111\u1ed9ng nghi\u1ec1n th\u1ee9c \u0103n \u1edf r\u0103ng c\u1ed1i.<\/p>\n

\u0110\u1ec3 \u0111\u1ea3m b\u1ea3o c\u00e1c r\u0103ng sau kh\u00f4ng b\u1ecb k\u00edch th\u00edch trong ho\u1ea1t \u0111\u1ed9ng c\u1eaft th\u1ee9c \u0103n \u1edf r\u0103ng tr\u01b0\u1edbc, c\u00e1c r\u0103ng sau ph\u1ea3i \u1edf tr\u1ea1ng th\u00e1i kh\u00f4ng ti\u1ebfp x\u00fac. Hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y g\u1ecdi l\u00e0 nh\u1ea3 kh\u1edbp (disocclusion) – c\u01a1 ch\u1ebf b\u1ea3o v\u1ec7 c\u1ee7a h\u1ec7 th\u1ed1ng nhai. C\u00f3 hai hi\u1ec7n t\u01b0\u1ee3ng nh\u1ea3 kh\u1edbp trong ho\u1ea1t \u0111\u1ed9ng nhai: nh\u1ea3 kh\u1edbp ra tr\u01b0\u1edbc v\u00e0 nh\u1ea3 kh\u1edbp sang b\u00ean. Nh\u1ea3 kh\u1edbp ra tr\u01b0\u1edbc x\u1ea3y ra khi c\u1eafn v\u00f9ng r\u0103ng tr\u01b0\u1edbc, c\u00f2n nh\u1ea3 kh\u1edbp sang b\u00ean x\u1ea3y ra khi h\u00e0m \u0111\u01b0a sang b\u00ean \u0111\u1ec3 nhai. Ph\u00eda kh\u00f4ng th\u1ef1c hi\u1ec7n ch\u1ee9c n\u0103ng s\u1ebd kh\u00f4ng ti\u1ebfp x\u00fac, g\u1ecdi l\u00e0 nh\u1ea3 kh\u1edbp sang b\u00ean.<\/p>\n

\u0110\u1eb7c \u0111i\u1ec3m h\u00ecnh th\u00e1i c\u1ee7a cung h\u00e0m \u0111\u1ea3m b\u1ea3o cho ch\u1ee9c n\u0103ng nhai hi\u1ec7u qu\u1ea3, \u1ed5n \u0111\u1ecbnh v\u1ecb tr\u00ed r\u0103ng v\u00e0 t\u1ef1 b\u1ea3o v\u1ec7. C\u00e1c \u0111\u01b0\u1eddng cong c\u1eafn kh\u1edbp v\u00e0 t\u01b0 th\u1ebf tr\u1ee5c r\u0103ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 th\u1ec3 hi\u1ec7n \u0111\u1eb7c \u0111i\u1ec3m n\u00e0y. \u0110\u01b0\u1eddng cong c\u1eafn kh\u1edbp theo chi\u1ec1u tr\u01b0\u1edbc sau l\u00e0 \u0111\u01b0\u1eddng cong Spee v\u00e0 \u0111\u01b0\u1eddng cong c\u1eafn kh\u1edbp theo chi\u1ec1u ngang l\u00e0 \u0111\u01b0\u1eddng cong Wilson.<\/p>\n

2. \u0110\u01b0\u1eddng cong Spee<\/h2>\n

\u0110\u01b0\u1eddng cong Spee do Spee m\u00f4 t\u1ea3 n\u0103m 1890, v\u1edbi \u0111\u1eb7c \u0111i\u1ec3m l\u00e0 \u0111\u01b0\u1eddng cong l\u00f5m nh\u1eb9 l\u00ean tr\u00ean khi n\u1ed1i \u0111\u1ec9nh r\u0103ng nanh v\u1edbi \u0111\u1ec9nh m\u00fai ngo\u00e0i c\u00e1c r\u0103ng c\u1ed1i nh\u1ecf v\u00e0 r\u0103ng c\u1ed1i l\u1edbn h\u00e0m d\u01b0\u1edbi (H\u00ecnh 1). \u0110\u01b0\u1eddng cong Spee khi k\u00e9o d\u00e0i s\u1ebd \u0111i qua t\u00e2m l\u1ed3i c\u1ea7u (H\u00ecnh 2).<\/p>\n

\"su-sap-xep-1\"
H\u00ecnh 1: \u0110\u01b0\u1eddng cong Spee.<\/figcaption><\/figure>\n
\"su-sap-xep-2\"
H\u00ecnh 2: \u0110\u01b0\u1eddng cong Spee k\u00e9o d\u00e0i \u0111i qua t\u00e2m l\u1ed3i c\u1ea7u.<\/figcaption><\/figure>\n

\u0110\u01b0\u1eddng cong Spee l\u00fd t\u01b0\u1edfng \u0111\u1ea3m b\u1ea3o h\u01b0\u1edbng tr\u1ee5c r\u0103ng song song v\u1edbi h\u01b0\u1edbng l\u1ef1c c\u01a1 nhai theo chi\u1ec1u tr\u01b0\u1edbc sau v\u00e0 c\u00e1c r\u0103ng sau nh\u1ea3 kh\u1edbp khi th\u1ef1c hi\u1ec7n ch\u1ee9c n\u0103ng nhai \u1edf r\u0103ng tr\u01b0\u1edbc (H\u00ecnh 3).<\/p>\n

\"su-sap-xep-3\"
H\u00ecnh 3: \u0110\u01b0\u1eddng cong Spee v\u1edbi t\u01b0\u01a1ng quan tr\u1ee5c r\u0103ng (A) v\u00e0 t\u01b0 th\u1ebf nh\u1ea3 kh\u1edbp ra tr\u01b0\u1edbc (B).<\/figcaption><\/figure>\n

\u0110\u1ed9 s\u00e2u c\u1ee7a \u0111\u01b0\u1eddng cong Spee \u0111\u01b0\u1ee3c \u0111o b\u1eb1ng c\u00e1ch t\u00ednh kho\u1ea3ng c\u00e1ch t\u1eeb \u0111\u1ec9nh m\u00fai ngo\u00e0i th\u1ea5p nh\u1ea5t \u0111\u1ebfn m\u1eb7t ph\u1eb3ng qua \u0111\u1ec9nh c\u1ee7a r\u0103ng nanh v\u00e0 m\u00fai xa ngo\u00e0i c\u1ee7a r\u0103ng c\u1ed1i l\u1edbn th\u1ee9 hai (xem H\u00ecnh 4). \u0110\u1ed9 s\u00e2u l\u00fd t\u01b0\u1edfng c\u1ee7a \u0111\u01b0\u1eddng cong Spee l\u00e0 kho\u1ea3ng 1,5 – 2 mm. Khi \u0111\u01b0\u1eddng cong Spee s\u00e2u h\u01a1n 3 mm, \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u0111\u01b0\u1eddng cong Spee s\u00e2u, v\u00e0 khi \u00edt h\u01a1n 1,5 mm, \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u0111\u01b0\u1eddng cong Spee ph\u1eb3ng. N\u1ebfu m\u1ea5t r\u0103ng \u0111\u1ed1i di\u1ec7n, \u0111\u01b0\u1eddng cong Spee c\u00f3 th\u1ec3 b\u1ecb m\u1ea5t ho\u1eb7c b\u1ea5t th\u01b0\u1eddng. Nh\u1eefng tr\u01b0\u1eddng h\u1ee3p n\u00e0y c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn m\u1ea5t nh\u1ea3 kh\u1edbp, g\u00e2y \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ch\u1ee9c n\u0103ng b\u1ed9 m\u00e1y nhai.<\/p>\n

\u1ede ng\u01b0\u1eddi Vi\u1ec7t Nam, \u0111\u01b0\u1eddng cong Spee trung b\u00ecnh c\u00f3 \u0111\u1ed9 s\u00e2u l\u00e0 1,91 mm, nam gi\u1edbi (2,02 mm) cao h\u01a1n n\u1eef gi\u1edbi (1,79 mm). V\u1ecb tr\u00ed m\u00fai ngo\u00e0i th\u1ea5p nh\u1ea5t c\u1ee7a \u0111\u01b0\u1eddng cong Spee l\u00e0 m\u00fai g\u1ea7n ngo\u00e0i c\u1ee7a r\u0103ng c\u1ed1i l\u1edbn th\u1ee9 nh\u1ea5t (theo nghi\u00ean c\u1ee9u c\u1ee7a H.T.H\u00f9ng v\u00e0 N.T.K.Anh,<\/p>\n

\"su-sap-xep-4\"
H\u00ecnh 4: \u0110\u01b0\u1eddng cong Spee b\u00ecnh th\u01b0\u1eddng (A) v\u00e0 \u0111\u01b0\u1eddng cong Spee s\u00e2u (B).<\/figcaption><\/figure>\n

3. \u0110\u01b0\u1eddng cong Wilson<\/h2>\n

\u0110\u01b0\u1eddng cong Wilson \u0111\u01b0\u1ee3c m\u00f4 t\u1ea3 b\u1edfi Wilson v\u00e0o n\u0103m 1917 v\u00e0 l\u00e0 \u0111\u01b0\u1eddng n\u1ed1i c\u00e1c \u0111\u1ec9nh c\u1ee7a m\u00fai ngo\u00e0i v\u00e0 m\u00fai trong c\u1ee7a c\u00e1c c\u1eb7p r\u0103ng \u0111\u1ed1i x\u1ee9ng tr\u00ean cung h\u00e0m. \u0110\u01b0\u1eddng cong Wilson c\u00f3 h\u00ecnh d\u1ea1ng l\u00f5m nh\u1eb9 l\u00ean tr\u00ean (xem H\u00ecnh 5) v\u00e0 gi\u00fap \u0111\u1ea3m b\u1ea3o r\u0103ng c\u1ed1i \u0111\u01b0\u1ee3c s\u1eafp x\u1ebfp v\u1edbi h\u01b0\u1edbng tr\u1ee5c r\u0103ng song song v\u1edbi h\u01b0\u1edbng l\u1ef1c nhai theo chi\u1ec1u ngang, t\u1eeb \u0111\u00f3 gi\u00fap nh\u1ea3 kh\u1edbp sang b\u00ean v\u00e0 d\u1ed3n th\u1ee9c \u0103n l\u00ean b\u1ea3n nhai m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 (xem H\u00ecnh 6). \u0110\u01b0\u1eddng cong Wilson \u0111\u01b0\u1ee3c t\u00ednh cho c\u1ea3 r\u0103ng c\u1ed1i nh\u1ecf v\u00e0 r\u0103ng c\u1ed1i l\u1edbn, v\u00e0 \u0111\u1ed9 cong l\u00f5m t\u0103ng d\u1ea7n t\u1eeb tr\u01b0\u1edbc ra sau. Vi\u1ec7c \u0111\u00e1nh gi\u00e1 \u0111\u01b0\u1eddng cong Wilson l\u00e0 m\u1ed9t \u0111\u00e1nh gi\u00e1 \u0111\u1ecbnh t\u00ednh, b\u1eb1ng c\u00e1ch quan s\u00e1t m\u1eabu h\u00e0m t\u1eeb ph\u00eda sau \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1eddng cong l\u00e0 d\u01b0\u01a1ng t\u00ednh (l\u00f5m) hay \u00e2m t\u00ednh (ph\u1eb3ng ho\u1eb7c l\u1ed3i).<\/p>\n

\"\"
H\u00ecnh 5: \u0110\u01b0\u1eddng cong Wilson \u0111i qua m\u00fai ngo\u00e0i v\u00e0 m\u00fai trong r\u0103ng c\u1ed1i.<\/figcaption><\/figure>\n
\"\"
H\u00ecnh 6: \u0110\u01b0\u1eddng cong Wilson v\u1edbi t\u01b0 th\u1ebf tr\u1ee5c r\u0103ng v\u00e0 ch\u1ee9c n\u0103ng d\u1ed3n th\u1ee9c \u0103n l\u00ean b\u1ea3n nhai.<\/figcaption><\/figure>\n

4. S\u1eafp x\u1ebfp theo m\u1eb7t ph\u1eb3ng nhai v\u00e0 m\u1eb7t c\u1ea7u Monson<\/h2>\n

M\u1eb7t ph\u1eb3ng nhai l\u00e0 m\u1ed9t m\u1eb7t ph\u1eb3ng t\u01b0\u1edfng t\u01b0\u1ee3ng \u0111i qua b\u1edd c\u1eafn r\u0103ng c\u1eeda v\u00e0 t\u1ea5t c\u1ea3 c\u00e1c \u0111\u1ec9nh m\u00fai r\u0103ng, c\u00f3 d\u1ea1ng m\u1eb7t cong l\u00f5m l\u00ean tr\u00ean v\u00e0 t\u00edch h\u1ee3p \u0111\u01b0\u1eddng cong Spee v\u00e0 \u0111\u01b0\u1eddng cong Wilson. Monson \u0111\u00e3 m\u00f4 t\u1ea3 m\u1ed9t m\u1eb7t cong t\u00edch h\u1ee3p gi\u1eefa \u0111\u01b0\u1eddng cong Spee v\u00e0 \u0111\u01b0\u1eddng cong Wilson th\u00e0nh m\u1ed9t m\u1eb7t c\u1ea7u, c\u00f3 b\u00e1n k\u00ednh kho\u1ea3ng 10,16 cm, v\u1edbi t\u00e2m l\u00e0 m\u00e0o g\u00e0 x\u01b0\u01a1ng s\u00e0ng (crista galli) (xem H\u00ecnh 7). M\u1eb7t ph\u1eb3ng nhai l\u00e0 m\u1ed9t ph\u1ea7n c\u1ee7a m\u1eb7t c\u1ea7u Monson v\u00e0 l\u00e0 c\u01a1 s\u1edf \u0111\u1ec3 t\u00e1i l\u1eadp \u0111\u01b0\u1eddng cong Spee tr\u00ean gi\u00e1 kh\u1edbp. T\u00e1i l\u1eadp m\u1eb7t ph\u1eb3ng nhai, bao g\u1ed3m \u0111\u01b0\u1eddng cong Spee v\u00e0 \u0111\u01b0\u1eddng cong Wilson, l\u00e0 r\u1ea5t quan tr\u1ecdng trong \u0111i\u1ec1u tr\u1ecb nha khoa ph\u1ee5c h\u1ed3i v\u00e0 \u0111i\u1ec1u tr\u1ecb ch\u1ec9nh nha.<\/p>\n

Vi\u1ec7c t\u00e1i l\u1eadp m\u1eb7t ph\u1eb3ng nhai bao g\u1ed3m hai b\u01b0\u1edbc ch\u00ednh: x\u00e1c \u0111\u1ecbnh h\u01b0\u1edbng m\u1eb7t ph\u1eb3ng nhai v\u00e0 t\u00e1i l\u1eadp \u0111\u01b0\u1eddng cong c\u1eafn kh\u1edbp. Qu\u00e1 tr\u00ecnh x\u00e1c \u0111\u1ecbnh h\u01b0\u1edbng m\u1eb7t ph\u1eb3ng nhai s\u1ebd ph\u1ee5 thu\u1ed9c v\u00e0o chuy\u00ean khoa l\u00e2m s\u00e0ng, bao g\u1ed3m nha khoa ph\u1ee5c h\u1ed3i v\u00e0 ch\u1ec9nh nha. C\u00e1c chuy\u00ean gia s\u1ebd s\u1eed d\u1ee5ng c\u00e1c m\u1eb7t ph\u1eb3ng tham chi\u1ebfu kh\u00e1c nhau \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh h\u01b0\u1edbng m\u1eb7t ph\u1eb3ng nhai. Tuy nhi\u00ean, m\u1eb7t ph\u1eb3ng nhai gi\u1ea3i ph\u1eabu kh\u00e1c v\u1edbi m\u1eb7t ph\u1eb3ng nhai trong ch\u1ec9nh nha, \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh qua c\u00e1c ph\u00e2n t\u00edch \u0111o \u0111\u1ea7u.<\/p>\n

T\u00e1i l\u1eadp \u0111\u01b0\u1eddng cong c\u1eafn kh\u1edbp c\u0169ng l\u00e0 m\u1ed9t b\u01b0\u1edbc quan tr\u1ecdng trong t\u00e1i l\u1eadp m\u1eb7t ph\u1eb3ng nhai. Vi\u1ec7c t\u00e1i l\u1eadp \u0111\u01b0\u1eddng cong c\u1eafn kh\u1edbp s\u1ebd bao g\u1ed3m vi\u1ec7c ch\u1ecdn k\u00edch th\u01b0\u1edbc v\u00e0 h\u00ecnh d\u1ea1ng c\u1ee7a gi\u00e1 kh\u1edbp \u0111\u1ec3 t\u1ea1o ra s\u1ef1 \u1ed5n \u0111\u1ecbnh v\u00e0 \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ea7n thi\u1ebft.<\/p>\n

\"\"
H\u00ecnh 7: H\u00ecnh \u1ea3nh x\u01b0\u01a1ng h\u00e0m d\u01b0\u1edbi (A) v\u1edbi m\u1eb7t c\u1ea7u Monson \u0111i qua trung t\u00e2m l\u1ed3i c\u1ea7u (B), v\u1edbi t\u00e2m l\u00e0 m\u00e0o g\u00e0 x\u01b0\u01a1ng s\u00e0ng(C). M\u1eb7t c\u1ea7u \u0111i qua m\u1eb7t nhai chi\u1ec1u tr\u01b0\u1edbc sau (D: \u0111\u01b0\u1eddng cong Spee) v\u00e0 chi\u1ec1u ngang (E: \u0111\u01b0\u1eddng cong Wilson) (ngu\u1ed3n: Internet).<\/figcaption><\/figure>\n

Ngu\u1ed3n: S\u00e1ch Ch\u1ec9nh nha l\u00e2m s\u00e0ng – T\u1eeb nguy\u00ean l\u00fd \u0111\u1ebfn k\u1ef9 thu\u1eadt, NXB Y h\u1ecdc Vi\u1ec7t Nam<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

Tr\u00ean cung h\u00e0m, c\u00e1c r\u0103ng \u0111\u01b0\u1ee3c s\u1eafp x\u1ebfp sao cho t\u1ed1i \u0111a h\u00f3a l\u1ef1c nhai v\u00e0 b\u1ea3o v\u1ec7 v\u1ecb tr\u00ed c\u1ee7a ch\u00fang. \u0110\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c hi\u1ec7u qu\u1ea3 nhai t\u1ed1t nh\u1ea5t v\u00e0 gi\u1ea3m thi\u1ec3u s\u1ef1 m\u00e0i m\u00f2n, c\u00e1c r\u0103ng \u0111\u01b0\u1ee3c x\u1ebfp theo h\u01b0\u1edbng tr\u1ee5c r\u0103ng song song v\u1edbi h\u01b0\u1edbng l\u1ef1c nhai v\u00e0 m\u1eb7t nhai vu\u00f4ng g\u00f3c […]<\/p>\n","protected":false},"author":21,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[28,33],"tags":[],"yoast_head":"\nS\u1ef1 s\u1eafp x\u1ebfp cung r\u0103ng theo b\u00ecnh di\u1ec7n \u0111\u1ee9ng trong Ch\u1ec9nh nha.<\/title>\n<meta name=\"description\" content=\"C\u00f9ng t\u00ecm hi\u1ec3u v\u1ec1 s\u1ef1 s\u1eafp x\u1ebfp c\u00e1c r\u0103ng theo b\u00ecnh di\u1ec7n 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