{"id":20211,"date":"2023-04-13T20:13:25","date_gmt":"2023-04-13T13:13:25","guid":{"rendered":"http:\/\/noithathoaphat.in\/ctv\/?p=20211"},"modified":"2023-04-14T11:49:45","modified_gmt":"2023-04-14T04:49:45","slug":"thanh-phan-composite-nha-khoa","status":"publish","type":"post","link":"http:\/\/noithathoaphat.in\/ctv\/index.php\/2023\/04\/13\/thanh-phan-composite-nha-khoa\/","title":{"rendered":"Th\u00e0nh ph\u1ea7n c\u01a1 b\u1ea3n c\u1ee7a composite nha khoa"},"content":{"rendered":"

Composite n\u1ec1n nh\u1ef1a l\u00e0 m\u1ed9t trong nh\u1eefng v\u1eadt li\u1ec7u tr\u00e1m ph\u1ed5 bi\u1ebfn v\u00e0 \u0111\u01b0\u1ee3c \u01b0a d\u00f9ng b\u1edfi c\u00e1c b\u00e1c s\u0129 R\u0103ng H\u00e0m M\u1eb7t b\u1edfi t\u00ednh th\u1ea9m m\u1ef9 c\u0169ng nh\u01b0 b\u1ec1n c\u1ee7a ch\u00fang. \u0110\u1ec3 c\u00f3 th\u1ec3 ki\u1ec3m so\u00e1t \u0111\u01b0\u1ee3c v\u1eadt li\u1ec7u t\u1ed1t tr\u00ean l\u00e2m s\u00e0ng, c\u00e1c b\u00e1c s\u0129 c\u1ea7n n\u1eafm r\u00f5 v\u1ec1 th\u00e0nh ph\u1ea7n c\u1ea5u t\u1ea1o n\u00ean composite. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd cung c\u1ea5p nh\u1eefng th\u00f4ng tin c\u1ea7n thi\u1ebft cho nh\u00e0 th\u1ef1c h\u00e0nh l\u00e2m s\u00e0ng!<\/strong><\/p>\n

\"tram-rang-bang-composite\"
H\u00ecnh \u1ea3nh tr\u01b0\u1edbc (tr\u00e1i) v\u00e0 sau (ph\u1ea3i) tr\u00e1m r\u0103ng b\u1eb1ng composite<\/figcaption><\/figure>\n
    \n
  1. \n

    \u0110\u1ecbnh ngh\u0129a composite nha khoa<\/h2>\n<\/li>\n<\/ol>\n

    Composite n\u1ec1n nh\u1ef1a trong nha khoa l\u00e0 v\u1eadt li\u1ec7u bao g\u1ed3m ba th\u00e0nh ph\u1ea7n ch\u00ednh: khung nh\u1ef1a \u0111\u01b0\u1ee3c li\u00ean k\u1ebft ch\u1eb7t v\u1edbi c\u00e1c h\u1ea1t ho\u1eb7c s\u1ee3i th\u1ee7y tinh, kho\u00e1ng ch\u1ea5t ho\u1eb7c c\u00e1c h\u1ea1n \u0111\u1ed9n g\u1ed1c nh\u1ef1a v\u00e0\/ho\u1eb7c s\u1ee3i ng\u1eafn \u0111\u01b0\u1ee3c li\u00ean k\u1ebft v\u1edbi ma tr\u1eadn b\u1edfi c\u00e1c ch\u1ea5t li\u00ean k\u1ebft. Nh\u1eefng lo\u1ea1i v\u1eadt li\u1ec7u n\u00e0y \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ph\u1ee5c h\u1ed3i v\u00e0 thay th\u1ebf m\u00f4 r\u0103ng b\u1ecb m\u1ea5t do b\u1ec7nh l\u00fd ho\u1eb7c ch\u1ea5n th\u01b0\u01a1ng v\u00e0 \u0111\u1ec3 g\u1eafn ph\u1ee5c h\u00ecnh c\u1ed1 \u0111\u1ecbnh nh\u01b0 ch\u1ee5p (m\u00e3o) r\u0103ng, mi\u1ebfng d\u00e1n veneer v\u00e0 c\u00e1c kh\u00ed c\u1ee5 nha khoa kh\u00e1c \u0111\u01b0\u1ee3c l\u00e0m ho\u1eb7c s\u1ea3n xu\u1ea5t s\u1eb5n.<\/p>\n

    B\u1edfi v\u00ec c\u00e1c composite n\u1ec1n nh\u1ef1a c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c l\u00e0m sao cho ph\u00f9 h\u1ee3p v\u1edbi m\u00e0u t\u1ef1 nhi\u00ean c\u1ee7a r\u0103ng, ch\u00fang \u0111\u00e3 tr\u1edf th\u00e0nh v\u1eadt li\u1ec7u tr\u00e1m r\u0103ng th\u1ea9m m\u1ef9 \u01b0a chu\u1ed9ng v\u00e0 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng trong c\u00e1c \u1ee9ng d\u1ee5ng nha khoa kh\u00e1c nhau.<\/p>\n

    M\u1ed9t l\u1ee3i th\u1ebf ch\u00ednh kh\u00e1c c\u1ee7a v\u1eadt li\u1ec7u n\u1ec1n nh\u1ef1a l\u00e0 ch\u00fang c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t v\u1edbi nhi\u1ec1u \u0111\u1ed9 nh\u1edbt kh\u00e1c nhau, t\u1eeb ch\u1ea5t l\u1ecfng \u0111\u1ebfn paste c\u1ee9ng, cho ph\u00e9p ch\u00fang \u0111\u01b0\u1ee3c d\u1ec5 d\u00e0ng \u0111i\u1ec1u khi\u1ec3n v\u00e0 t\u1ea1o h\u00ecnh t\u00f9y ch\u1ec9nh, sau \u0111\u00f3 \u0111\u01b0\u1ee3c chuy\u1ec3n \u0111\u1ed5i th\u00f4ng qua ph\u1ea3n \u1ee9ng polymer-h\u00f3a th\u00e0nh m\u1ed9t kh\u1ed1i c\u1ee9ng, ch\u1eafc ch\u1eafn v\u00e0 b\u1ec1n v\u1eefng.<\/p>\n

      \n
    1. \n

      \u1ee8ng d\u1ee5ng c\u1ee7a composite<\/h2>\n<\/li>\n<\/ol>\n

      C\u00e1c \u1ee9ng d\u1ee5ng nha khoa cho composite n\u1ec1n nh\u1ef1a bao g\u1ed3m:<\/p>\n

        \n
      • V\u1eadt li\u1ec7u h\u1ed3i ph\u1ee5c th\u00e2n r\u0103ng<\/li>\n
      • Ch\u1ea5t k\u1ebft d\u00ednh<\/li>\n
      • Ch\u1ea5t tr\u00e1m b\u00edt h\u1ed1 r\u00e3nh<\/li>\n
      • Ch\u1ea5t k\u1ebft d\u00ednh trong \u0111i\u1ec1u tr\u1ecb n\u1ed9i nha<\/li>\n
      • G\u1eafn d\u00ednh veneer v\u00e0 c\u00e1c lo\u1ea1i keo g\u1eafn cho c\u00e1c lo\u1ea1i ch\u1ee5p r\u0103ng, c\u1ea7u r\u0103ng v\u00e0 c\u00e1c ph\u1ee5c h\u00ecnh nha khoa c\u1ed1 \u0111\u1ecbnh kh\u00e1c<\/li>\n<\/ul>\n
          \n
        1. \n

          Ph\u00e2n lo\u1ea1i composite<\/h2>\n<\/li>\n<\/ol>\n
            \n
          • D\u1ef1a theo th\u00e0nh ph\u1ea7n nh\u1ef1a khung:
            \nComposite n\u00e9n: c\u00f3 \u0111\u1ed9 \u0111\u1eb7c cao, c\u00f3 th\u1ec3 n\u00e9n \u0111\u01b0\u1ee3c, c\u00f3 \u0111\u1ed9 kh\u00e1ng m\u00e0i m\u00f2n cao v\u00e0 \u0111\u1ed9 co th\u1ea5p.
            \nComposite d\u1ebbo: c\u00f3 \u0111\u1ed9 \u0111\u1eb7c trung b\u00ecnh, th\u01b0\u1eddng tr\u00e1m r\u0103ng tr\u01b0\u1edbc ho\u1eb7c c\u00e1c v\u1ecb tr\u00ed \u00edt ch\u1ecbu l\u1ef1c.
            \nComposite l\u1ecfng: c\u00f3 \u0111\u1ed9 nh\u1edbt th\u1ea5p, c\u00f3 th\u1ec3 ch\u1ea3y v\u00e0o c\u00e1c r\u00e3nh, d\u00e0n m\u1ecfng tr\u00ean b\u1ec1 m\u1eb7t.<\/li>\n
          • D\u1ef1a theo ki\u1ec3u tr\u00f9ng h\u1ee3p:
            \nComposite h\u00f3a tr\u00f9ng h\u1ee3p
            \nComposite quang tr\u00f9ng h\u1ee3p
            \nComposite l\u01b0\u1ee1ng tr\u00f9ng h\u1ee3p<\/li>\n
          • D\u1ef1a theo k\u00edch th\u01b0\u1edbc h\u1ea1t \u0111\u1ed9n:
            \nComposite h\u1ea1t \u0111\u1ed9n k\u00edch th\u01b0\u1edbc l\u1edbn
            \nComposite h\u1ea1t \u0111\u1ed9n k\u00edch th\u01b0\u1edbc trung b\u00ecnh
            \nComposite h\u1ea1t \u0111\u1ed9n k\u00edch th\u01b0\u1edbc nh\u1ecf
            \nComposite kh\u00f4ng h\u1ea1t \u0111\u1ed9n<\/li>\n<\/ul>\n
              \n
            1. \n

              Th\u00e0nh ph\u1ea7n c\u1ee7a composite<\/h2>\n<\/li>\n<\/ol>\n

              Khung nh\u1ef1a<\/h3>\n

              Khung nh\u1ef1a trong h\u1ea7u h\u1ebft c\u00e1c composite nha khoa d\u1ef1a tr\u00ean m\u1ed9t h\u1ed7n h\u1ee3p c\u00e1c monomer dimethacrylate th\u01a1m v\u00e0\/ho\u1eb7c kh\u00f4ng th\u01a1m nh\u01b0 bis-GMA v\u00e0 urethane dimethacrylate (UDMA) \u0111\u1ec3 t\u1ea1o th\u00e0nh c\u1ea5u tr\u00fac polymer ch\u1ecbu l\u1ef1c, c\u1ee9ng v\u00e0 b\u1ec1n v\u1eefng v\u1edbi s\u1ef1 li\u00ean k\u1ebft ch\u00e9o cao. Khung n\u00e0y t\u1ea1o th\u00e0nh m\u1ed9t pha li\u00ean t\u1ee5c trong \u0111\u00f3 h\u1ea1t \u0111\u1ed9n t\u0103ng c\u01b0\u1eddng \u0111\u01b0\u1ee3c ph\u00e2n t\u00e1n. Do k\u00edch th\u01b0\u1edbc ph\u00e2n t\u1eed l\u1edbn c\u1ee7a c\u00e1c monomer n\u00e0y, s\u1ef1 co ng\u00f3t tr\u00f9ng h\u01a1pk c\u00f3 th\u1ec3 th\u1ea5p \u0111\u1ebfn m\u1ee9c \u00a00,9% (trung b\u00ecnh l\u00e0 1,5% so v\u1edbi kho\u1ea3ng 2 \u0111\u1ebfn 3% cho h\u1ea7u h\u1ebft c\u00e1c composite) khi k\u1ebft h\u1ee3p v\u1edbi h\u1ea1t \u0111\u1ed9n t\u0103ng c\u01b0\u1eddng v\u00f4 c\u01a1 \u1edf m\u1ee9c \u0111\u1ed9 l\u00ean \u0111\u1ebfn 88% theo tr\u1ecdng l\u01b0\u1ee3ng. Tuy nhi\u00ean, UDMA v\u00e0 bis-GMA c\u00f3 \u0111\u1ed9 nh\u1edbt cao (800.000 centipoise, t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi m\u1eadt ong v\u00e0o m\u1ed9t ng\u00e0y l\u1ea1nh) v\u00e0 kh\u00f3 tr\u1ed9n v\u00e0 \u0111i\u1ec1u khi\u1ec3n. Do \u0111\u00f3, c\u1ea7n s\u1eed d\u1ee5ng c\u00e1c t\u1ef7 l\u1ec7 kh\u00e1c nhau c\u1ee7a c\u00e1c monomer nh\u1eb9 h\u01a1n v\u00e0 d\u1ec5 ch\u1ea3y, ch\u1eb3ng h\u1ea1n nh\u01b0 triethylene glycol dimethacrylate (TEGDMA, t\u1eeb 5 \u0111\u1ebfn 30 centipoise) v\u00e0 c\u00e1c dimethacrylate kh\u00e1c c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng ph\u00e2n t\u1eed th\u1ea5p h\u01a1n \u0111\u1ec3 pha tr\u1ed9n v\u00e0 pha lo\u00e3ng c\u00e1c th\u00e0nh ph\u1ea7n \u0111\u1eb7c nh\u1edbt \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c nh\u1ef1a \u0111\u1ee7 d\u1ec5 \u0111i\u1ec1u khi\u1ec3n trong th\u1ef1c h\u00e0nh l\u00e2m s\u00e0ng v\u00e0 \u0111\u1ee7 t\u0103ng c\u01b0\u1eddng \u0111\u1ec3 gia c\u1ed1 nh\u1ef1a \u0111\u00e3 tr\u00f9ng h\u1ee3p c\u1ee9ng. V\u00ed d\u1ee5, m\u1ed9t h\u1ed7n h\u1ee3p g\u1ed3m 75% bis-GMA v\u00e0 25% TEGDMA theo tr\u1ecdng l\u01b0\u1ee3ng c\u00f3 \u0111\u1ed9 nh\u1edbt l\u00e0 4300 centipoise, trong khi \u0111\u1ed9 nh\u1edbt c\u1ee7a m\u1ed9t h\u1ed7n h\u1ee3p 50% bis-GMA\/50% TEGDMA l\u00e0 200 centipoise (t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi xi-r\u00f4 lo\u00e3ng). Tuy nhi\u00ean, c\u00e1c monomer nh\u1ecf h\u01a1n n\u00e0y d\u1ec5 b\u1ecb co ng\u00f3t sau qu\u00e1 tr\u00ecnh tr\u00f9ng h\u1ee3p h\u01a1n, m\u1ed9t ph\u1ea7n b\u00f9 \u0111\u1eafp cho l\u1ee3i th\u1ebf c\u1ee7a vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1c monomer l\u1edbn nh\u01b0 bis-GMA. N\u00f3i chung, c\u00e0ng nhi\u1ec1u t\u1ef7 l\u1ec7 c\u1ee7a c\u00e1c monomer “pha lo\u00e3ng” n\u00e0y, c\u00e0ng cao nguy c\u01a1 co ng\u00f3t sau tr\u00f9ng h\u1ee3p v\u00e0 c\u00e0ng cao nguy c\u01a1 r\u00f2 r\u1ec9 \u1edf khe vi\u1ec1n mi\u1ebfng tr\u00e1m v\u00e0 qua \u0111\u00f3, c\u00e1c v\u1ea5n \u0111\u1ec1 c\u00f3 th\u1ec3 ph\u00e1t sinh.<\/p>\n

              H\u1ea1t \u0111\u1ed9n<\/h3>\n

              C\u00e1c lo\u1ea1i h\u1ea1t \u0111\u1ed9n kh\u00e1c nhau \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u0103ng c\u01b0\u1eddng v\u00e0 gia c\u1ed1 composite c\u0169ng nh\u01b0 gi\u1ea3m co ng\u00f3t sau tr\u00f9ng h\u1ee3p hay gi\u00e3n n\u1edf nhi\u1ec7t (th\u01b0\u1eddng l\u00e0 t\u1eeb 30% \u0111\u1ebfn 70% theo th\u1ec3 t\u00edch ho\u1eb7c t\u1eeb 50% \u0111\u1ebfn 85% theo tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a composite). C\u00e1c h\u1ea1t \u0111\u1ed9n bao g\u1ed3m c\u00e1c lo\u1ea1i \u201cth\u1ee7y tinh m\u1ec1m\u201d hay \u201cth\u1ee7y tinh c\u1ee9ng\u201d borosilicate , th\u1ea1ch anh, silicat nh\u00f4m, lithi alumina silicat (beta-eucryptite, c\u00f3 h\u1ec7 s\u1ed1 gi\u00e3n n\u1edf nhi\u1ec7t \u00e2m), fluroua ytterbium v\u00e0 c\u00e1c lo\u1ea1i th\u1ee7y tinh ch\u1ee9a c\u00e1c nguy\u00ean t\u1ed1 kim lo\u1ea1i n\u1eb7ng nh\u01b0 bari (Ba), stronti (Sr), zircon (Zr) v\u00e0 k\u1ebdm. N\u0103m lo\u1ea1i h\u1ea1t \u0111\u1ed9n cu\u1ed1i c\u00f9ng cung c\u1ea5p kh\u1ea3 n\u0103ng ph\u00e1t x\u1ea1 tia X do ch\u1ee9a c\u00e1c nguy\u00ean t\u1eed kim lo\u1ea1i n\u1eb7ng.<\/p>\n

              Th\u1ea1ch anh \u0111\u00e3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i l\u00e0m h\u1ea1t \u0111\u1ed9n trong c\u00e1c phi\u00ean b\u1ea3n \u0111\u1ea7u ti\u00ean c\u1ee7a composite nha khoa. N\u00f3 c\u00f3 l\u1ee3i th\u1ebf l\u00e0 b\u1ec1n h\u00f3a h\u1ecdc v\u00e0 c\u0169ng r\u1ea5t c\u1ee9ng, l\u00e0m m\u00f2n r\u0103ng ho\u1eb7c c\u00e1c ch\u1ea5t tr\u00e1m r\u0103ng \u0111\u1ed1i di\u1ec7n c\u0169ng nh\u01b0 kh\u00f3 m\u00e0i nh\u1ecf th\u00e0nh c\u00e1c h\u1ea1t r\u1ea5t m\u1ecbn; do \u0111\u00f3, n\u00f3 c\u0169ng kh\u00f3 \u0111\u00e1nh b\u00f3ng. Silicat kh\u00f4ng tinh th\u1ec3, c\u00f2n g\u1ecdi l\u00e0 silica v\u00f4 \u0111\u1ecbnh h\u00ecnh, c\u00f3 c\u00f9ng th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc v\u00e0 ch\u1ec9 s\u1ed1 kh\u00fac x\u1ea1 nh\u01b0 th\u1ea1ch anh; tuy nhi\u00ean, n\u00f3 kh\u00f4ng c\u00f3 c\u1ea5u tr\u00fac tinh th\u1ec3 v\u00e0 kh\u00f4ng c\u1ee9ng b\u1eb1ng n\u00ean gi\u1ea3m \u0111\u00e1ng k\u1ec3 s\u1ef1 m\u00e0i m\u00f2n c\u1ee7a b\u1ec1 m\u1eb7t composite v\u00e0 c\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng \u0111\u00e1nh b\u00f3ng c\u1ee7a n\u00f3.<\/p>\n

              \u0110\u1ec3 c\u00f3 t\u00ednh th\u1ea9m m\u1ef9 ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c, \u0111\u1ed9 trong su\u1ed1t c\u1ee7a m\u1ed9t h\u1ee3p ch\u1ea5t l\u1ea5p \u0111\u1ea7y ph\u1ea3i t\u01b0\u01a1ng t\u1ef1 nh\u01b0 c\u1ea5u tr\u00fac r\u0103ng. Do \u0111\u00f3, ch\u1ec9 s\u1ed1 kh\u00fac x\u1ea1 c\u1ee7a h\u1ea1t \u0111\u1ed9n ph\u1ea3i g\u1ea7n gi\u1ed1ng v\u1edbi nh\u1ef1a. \u0110\u1ed1i v\u1edbi bis-GMA v\u00e0 TEGDMA, ch\u1ec9 s\u1ed1 kh\u00fac x\u1ea1 l\u1ea7n l\u01b0\u1ee3t l\u00e0 kho\u1ea3ng 1,55 v\u00e0 1,46 v\u00e0 m\u1ed9t h\u1ed7n h\u1ee3p c\u1ee7a hai th\u00e0nh ph\u1ea7n v\u1edbi t\u1ef7 l\u1ec7 b\u1eb1ng nhau theo tr\u1ecdng l\u01b0\u1ee3ng s\u1ebd cho ch\u1ec9 s\u1ed1 kh\u00fac x\u1ea1 kho\u1ea3ng 1,50. H\u1ea7u h\u1ebft c\u00e1c lo\u1ea1i th\u1ee7y tinh v\u00e0 th\u1ea1ch anh \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho h\u1ea1t \u0111\u1ed9n c\u00f3 ch\u1ec9 s\u1ed1 kh\u00fac x\u1ea1 kho\u1ea3ng 1,50, \u0111\u1ee7 \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c t\u00ednh trong su\u1ed1t mong mu\u1ed1n.<\/p>\n

              Ch\u1ea5t li\u00ean k\u1ebft<\/h3>\n

              Nh\u01b0 \u0111\u00e3 \u0111\u1ec1 c\u1eadp tr\u01b0\u1edbc \u0111\u00f3, r\u1ea5t quan tr\u1ecdng l\u00e0 c\u00e1c h\u1ea1t h\u1ea1t \u0111\u1ed9n \u0111\u01b0\u1ee3c li\u00ean k\u1ebft v\u1edbi khung nh\u1ef1a. \u0110i\u1ec1u n\u00e0y cho ph\u00e9p composite linh ho\u1ea1t h\u01a1n chuy\u1ec3n c\u00e1c l\u1ef1c c\u0103ng \u0111\u1ebfn c\u00e1c h\u1ea1t h\u1ea1t \u0111\u1ed9n c\u00f3 \u0111\u1ed9 d\u1ebbo cao (c\u1ee9ng v\u00e0 ch\u1eafc h\u01a1n). Li\u00ean k\u1ebft h\u00f3a h\u1ecdc gi\u1eefa hai pha c\u1ee7a composite \u0111\u01b0\u1ee3c h\u00ecnh th\u00e0nh b\u1edfi m\u1ed9t ch\u1ea5t li\u00ean k\u1ebft; \u0111\u00e2y l\u00e0 m\u1ed9t h\u1ee3p ch\u1ea5t b\u1ec1 m\u1eb7t ho\u1ea1t \u0111\u1ed9ng hai ch\u1ee9c n\u0103ng, b\u00e1m v\u00e0o b\u1ec1 m\u1eb7t h\u1ea1t h\u1ea1t \u0111\u1ed9n v\u00e0 c\u0169ng t\u00e1c \u0111\u1ed9ng v\u1edbi monomer t\u1ea1o th\u00e0nh khung nh\u1ef1a. M\u1ed9t ch\u1ea5t li\u00ean k\u1ebft \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng \u0111\u00fang c\u00e1ch c\u00f3 th\u1ec3 cung c\u1ea5p c\u00e1c t\u00ednh ch\u1ea5t v\u1eadt l\u00fd v\u00e0 c\u01a1 h\u1ecdc c\u1ea3i thi\u1ec7n v\u00e0 ng\u0103n ch\u1eb7n s\u1ef1 r\u00f2 r\u1ec9 b\u1eb1ng c\u00e1ch ng\u0103n ch\u1eb7n n\u01b0\u1edbc x\u00e2m nh\u1eadp v\u00e0o di\u1ec7n ti\u1ebfp x\u00fac gi\u1eefa h\u1ea1t \u0111\u1ed9n v\u00e0 nh\u1ef1a.<\/p>\n

              M\u1eb7c d\u00f9 titanat v\u00e0 zirconat c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nh\u01b0 c\u00e1c ch\u1ea5t li\u00ean k\u1ebft, nh\u01b0ng silane h\u1eefu c\u01a1 – nh\u01b0 \u03b3-methacryloxypropyl trimethoxysilane – \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn nh\u1ea5t. Trong s\u1ef1 hi\u1ec7n di\u1ec7n c\u1ee7a n\u01b0\u1edbc, c\u00e1c nh\u00f3m metoxi (-OCH3) b\u1ecb th\u1ee7y ph\u00e2n th\u00e0nh c\u00e1c nh\u00f3m silanol (-Si-OH), c\u00f3 th\u1ec3 li\u00ean k\u1ebft v\u1edbi c\u00e1c silanol kh\u00e1c tr\u00ean b\u1ec1 m\u1eb7t h\u1ea1t \u0111\u1ed9n b\u1eb1ng c\u00e1ch t\u1ea1o th\u00e0nh li\u00ean k\u1ebft siloxan (-Si-O-Si-). C\u00e1c nh\u00f3m methacrylat silane h\u1eefu c\u01a1 t\u1ea1o th\u00e0nh c\u00e1c li\u00ean k\u1ebft c\u1ed9ng h\u00f3a tr\u1ecb v\u1edbi nh\u1ef1a khi n\u00f3 \u0111\u01b0\u1ee3c polymer h\u00f3a, ho\u00e0n th\u00e0nh qu\u00e1 tr\u00ecnh li\u00ean k\u1ebft. M\u1ed9t ch\u1ea5t li\u00ean k\u1ebft b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng h\u1eefu c\u01a1 silane l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi hi\u1ec7u su\u1ea5t l\u00e2m s\u00e0ng c\u1ee7a v\u1eadt li\u1ec7u tr\u00e1m composite n\u1ec1n nh\u1ef1a.<\/p>\n

               <\/p>\n

               <\/p>\n

              Ngu\u1ed3n tham kh\u1ea3o:<\/p>\n

                \n
              1. \n
                \n

                Phillips’ Science of Dental Materials, 13th Edition. 2021<\/p>\n<\/header>\n<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"

                Composite n\u1ec1n nh\u1ef1a l\u00e0 m\u1ed9t trong nh\u1eefng v\u1eadt li\u1ec7u tr\u00e1m ph\u1ed5 bi\u1ebfn v\u00e0 \u0111\u01b0\u1ee3c \u01b0a d\u00f9ng b\u1edfi c\u00e1c b\u00e1c s\u0129 R\u0103ng H\u00e0m M\u1eb7t b\u1edfi t\u00ednh th\u1ea9m m\u1ef9 c\u0169ng nh\u01b0 b\u1ec1n c\u1ee7a ch\u00fang. \u0110\u1ec3 c\u00f3 th\u1ec3 ki\u1ec3m so\u00e1t \u0111\u01b0\u1ee3c v\u1eadt li\u1ec7u t\u1ed1t tr\u00ean l\u00e2m s\u00e0ng, c\u00e1c b\u00e1c s\u0129 c\u1ea7n n\u1eafm r\u00f5 v\u1ec1 th\u00e0nh ph\u1ea7n c\u1ea5u t\u1ea1o […]<\/p>\n","protected":false},"author":35,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[28,33],"tags":[3],"yoast_head":"\nTh\u00e0nh ph\u1ea7n c\u01a1 b\u1ea3n c\u1ee7a composite nha khoa - Vinmec<\/title>\n<meta name=\"description\" content=\"Composite l\u00e0 l\u1ef1a ch\u1ecdn ph\u1ed5 bi\u1ebfn v\u00e0 \u01b0a th\u00edch c\u1ee7a c\u00e1c b\u00e1c s\u0129 nha khoa. 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