{"id":20265,"date":"2023-04-13T20:15:15","date_gmt":"2023-04-13T13:15:15","guid":{"rendered":"http:\/\/noithathoaphat.in\/ctv\/?p=20265"},"modified":"2023-04-14T11:49:25","modified_gmt":"2023-04-14T04:49:25","slug":"cac-yeu-to-anh-huong-qua-trinh-trung-hop-cua-composite","status":"publish","type":"post","link":"http:\/\/noithathoaphat.in\/ctv\/index.php\/2023\/04\/13\/cac-yeu-to-anh-huong-qua-trinh-trung-hop-cua-composite\/","title":{"rendered":"C\u00e1c y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng qu\u00e1 tr\u00ecnh tr\u00f9ng h\u1ee3p c\u1ee7a composite"},"content":{"rendered":"

Composite, c\u1ee5 th\u1ec3 h\u01a1n l\u00e0 composite quang tr\u00f9ng h\u1ee3p 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, \u0111\u1ea3m b\u1ea3o mi\u1ebfng tr\u00e1m c\u00f3 \u0111\u1ed9 ho\u00e0n thi\u1ec7n cao, c\u00e1c b\u00e1c s\u0129 c\u1ea7n n\u1eafm r\u00f5 v\u1ec1nh\u1eefng y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng t\u1edbi s\u1ef1 tr\u00f9ng h\u1ee3p c\u1ee7a 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

\"den-trung-hop-composite\"
\u0110\u00e8n tr\u00f9ng h\u1ee3p \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong tr\u00f9ng h\u1ee3p composite<\/figcaption><\/figure>\n

1. \u0110\u00e8n tr\u00f9ng h\u1ee3p<\/h2>\n

H\u1ea7u h\u1ebft c\u00e1c \u0111\u00e8n tr\u00f9ng h\u1ee3p l\u00e0 c\u00e1c thi\u1ebft b\u1ecb c\u1ea7m tay ph\u00e1t ra ngu\u1ed3n s\u00e1ng v\u00e0 \u0111\u01b0\u1ee3c trang b\u1ecb m\u1ed9t \u0111\u1ea7u h\u01b0\u1edbng d\u1eabn \u00e1nh s\u00e1ng ng\u1eafn, c\u1ee9ng \u0111\u01b0\u1ee3c l\u00e0m b\u1eb1ng c\u00e1c s\u1ee3i quang h\u1ecdc n\u1ed1i li\u1ec1n. M\u1ed9t s\u1ed1 b\u00f3ng \u0111\u00e8n c\u00f3 thi\u1ebft b\u1ecb ngu\u1ed3n \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i v\u1edbi d\u1ee5ng c\u1ee5 c\u1ea7m tay nha khoa. Hi\u1ec7n nay, ngu\u1ed3n s\u00e1ng ph\u1ed5 bi\u1ebfn nh\u1ea5t l\u00e0 b\u00f3ng \u0111\u00e8n th\u1ea1ch anh c\u00f3 1 s\u1ee3i \u0111\u1ed1t wolfram trong m\u00f4i tr\u01b0\u1eddng halogen, t\u01b0\u01a1ng t\u1ef1 nh\u01b0 nh\u1eefng ngu\u1ed3n s\u00e1ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong \u0111\u00e8n pha \u00f4 t\u00f4 v\u00e0 m\u00e1y chi\u1ebfu k\u0129 thu\u1eadt s\u1ed1. G\u1ea7n \u0111\u00e2y, \u0111\u00e3 c\u00f3 c\u00e1c lo\u1ea1i kh\u00e1c \u0111\u01b0\u1ee3c gi\u1edbi thi\u1ec7u v\u1edbi nh\u1eefng \u01b0u \u0111i\u1ec3m \u0111\u00e3 l\u00e0m cho ch\u00fang ng\u00e0y c\u00e0ng ph\u1ed5 bi\u1ebfn h\u01a1n. C\u00f3 b\u1ed1n lo\u1ea1i b\u00f3ng \u0111\u00e8n c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho qu\u00e1 tr\u00ecnh kh\u1edfi \u0111\u1ed9ng qu\u00e1 tr\u00ecnh polymer h\u00f3a. Ph\u1ea7n ti\u1ebfp theo li\u1ec7t k\u00ea c\u00e1c b\u00f3ng \u0111\u00e8n n\u00e0y theo th\u1ee9 t\u1ef1 t\u1eeb \u0111\u1ed9 m\u1ea1nh th\u1ea5p nh\u1ea5t \u0111\u1ebfn \u0111\u1ed9 m\u1ea1nh cao nh\u1ea5t.<\/p>\n

    \n
  • \u0110\u00e8n LED (light-emitting diode).<\/li>\n<\/ul>\n

    S\u1eed d\u1ee5ng qu\u00e1 tr\u00ecnh \u0111i\u1ec7n t\u1eed trong tr\u1ea1ng th\u00e1i r\u1eafn, c\u00e1c ngu\u1ed3n s\u00e1ng n\u00e0y ph\u00e1t x\u1ea1 b\u1ee9c x\u1ea1 ch\u1ec9 trong ph\u1ed5 m\u00e0u xanh duy nh\u1ea5t c\u1ee7a quang ph\u1ed5, t\u1eeb 440 \u0111\u1ebfn 480 nm v\u00e0 kh\u00f4ng c\u1ea7n b\u1ed9 l\u1ecdc. \u00a0\u0110\u00e8n LED y\u00eau c\u1ea7u c\u00f4ng su\u1ea5t th\u1ea5p, c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng pin, kh\u00f4ng t\u1ea1o ra nhi\u1ec7t v\u00e0 y\u00ean t\u0129nh v\u00ec kh\u00f4ng c\u1ea7n qu\u1ea1t l\u00e0m m\u00e1t. M\u1eb7c d\u00f9 ch\u00fang ph\u00e1t x\u1ea1 b\u1ee9c x\u1ea1 th\u1ea5p nh\u1ea5t do b\u1ea3n ch\u1ea5t, nh\u01b0ng phi\u00ean b\u1ea3n m\u1edbi nh\u1ea5t m\u1ea1nh h\u01a1n v\u00e0 s\u1eed d\u1ee5ng hai ho\u1eb7c nhi\u1ec1u \u0111\u01a1n v\u1ecb LED \u0111\u1ec3 c\u00f9ng t\u0103ng c\u01b0\u1eddng \u0111\u1ed9 s\u00e1ng v\u00e0 m\u1edf r\u1ed9ng d\u1ea3i b\u01b0\u1edbc s\u00f3ng.<\/p>\n

      \n
    • \u0110\u00e8n halogen th\u1ea1ch anh – wolfram (QTH).<\/li>\n<\/ul>\n

      \u0110\u00e8n QTH c\u00f3 b\u00f3ng th\u1ea1ch anh v\u1edbi m\u1ed9t s\u1ee3i \u0111\u1ed1t wolfram chi\u1ebfu x\u1ea1 c\u1ea3 \u00e1nh s\u00e1ng UV v\u00e0 tr\u1eafng, ph\u1ea3i \u0111\u01b0\u1ee3c l\u1ecdc \u0111\u1ec3 lo\u1ea1i b\u1ecf nhi\u1ec7t v\u00e0 t\u1ea5t c\u1ea3 c\u00e1c b\u01b0\u1edbc s\u00f3ng ngo\u1ea1i tr\u1eeb nh\u1eefng b\u01b0\u1edbc s\u00f3ng trong d\u1ea3i m\u00e0u t\u00edm-xanh (kho\u1ea3ng 400 \u0111\u1ebfn 500 nm). \u0110\u1ed9 m\u1ea1nh c\u1ee7a b\u00f3ng gi\u1ea3m d\u1ea7n theo th\u1eddi gian s\u1eed d\u1ee5ng, v\u00ec v\u1eady c\u1ea7n m\u1ed9t m\u00e1y hi\u1ec7u chu\u1ea9n \u0111\u1ec3 \u0111o \u0111\u1ed9 m\u1ea1nh.<\/p>\n

        \n
      • \u0110\u00e8n PAC (plasma arc curing).<\/li>\n<\/ul>\n

        \u0110\u00e8n PAC s\u1eed d\u1ee5ng kh\u00ed xenon \u0111\u01b0\u1ee3c ion h\u00f3a \u0111\u1ec3 t\u1ea1o ra m\u1ed9t plasma. \u00c1nh s\u00e1ng tr\u1eafng c\u01b0\u1eddng \u0111\u1ed9 cao \u0111\u01b0\u1ee3c l\u1ecdc \u0111\u1ec3 lo\u1ea1i b\u1ecf nhi\u1ec7t v\u00e0 \u0111\u1ec3 cho ph\u00e9p \u00e1nh s\u00e1ng xanh (kho\u1ea3ng 400 \u0111\u1ebfn 500 nm) \u0111\u01b0\u1ee3c ph\u00e1t ra.<\/p>\n

          \n
        • \u0110\u00e8n laser Argon.<\/li>\n<\/ul>\n

          \u0110\u00e8n laser Argon c\u00f3 \u0111\u1ed9 m\u1ea1nh cao nh\u1ea5t v\u00e0 ph\u00e1t x\u1ea1 \u1edf m\u1ed9t b\u01b0\u1edbc s\u00f3ng duy nh\u1ea5t. C\u00e1c \u0111\u00e8n hi\u1ec7n c\u00f3 ph\u00e1t ra \u00e1nh s\u00e1ng \u1edf b\u01b0\u1edbc s\u00f3ng kho\u1ea3ng 490 nm. C\u00e1c \u0111\u00e8n wolfram v\u00e0 plasma arc \u0111\u01b0\u1ee3c l\u1ecdc \u0111\u1ec3 truy\u1ec1n \u00e1nh s\u00e1ng ch\u1ec9 trong ph\u1ea7n c\u1ee7a v\u00f9ng t\u00edm-xanh c\u1ee7a ph\u1ed5 ph\u00f9 h\u1ee3p v\u1edbi d\u1ea3i h\u1ea5p th\u1ee5 \u00e1nh s\u00e1ng c\u1ee7a CQ, m\u1ed9t ch\u1ea5t k\u00edch ho\u1ea1t \u00e1nh s\u00e1ng r\u1ed9ng r\u00e3i \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho nh\u1ef1a nha khoa. Hi\u1ec7n nay, c\u00e1c \u0111\u00e8n tr\u00f9ng h\u1ee3p v\u00e0 laser nha khoa \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 ph\u00e1t x\u1ea1 \u00e1nh s\u00e1ng ch\u1ec9 trong ph\u1ea1m vi ph\u1ed5 m\u00e0u xanh trong d\u1ea3i h\u1ea5p th\u1ee5 \u00e1nh s\u00e1ng 400-500 nm c\u1ee7a CQ. Do \u0111\u00f3, ch\u00fang kh\u00f4ng c\u1ea7n b\u1ed9 l\u1ecdc. M\u1ed9t s\u1ed1 ch\u1ea5t k\u00edch ho\u1ea1t \u00e1nh s\u00e1ng v\u00e0 ngu\u1ed3n s\u00e1ng \u0111\u00e3 \u0111\u01b0\u1ee3c gi\u1edbi thi\u1ec7u h\u1ea5p th\u1ee5 ho\u1eb7c ph\u00e1t x\u1ea1 \u1edf b\u01b0\u1edbc s\u00f3ng ngo\u00e0i d\u1ea3i 400-500 nm, s\u1ebd cung c\u1ea5p qu\u00e1 tr\u00ecnh polymer h\u00f3a kh\u00f4ng \u0111\u1ee7 n\u1ebfu \u0111\u00e8n v\u00e0 nh\u1ef1a\/ch\u1ea5t k\u00edch ho\u1ea1t \u00e1nh s\u00e1ng kh\u00f4ng ph\u00f9 h\u1ee3p v\u1edbi nhau.<\/p>\n

          Qu\u00e1 tr\u00ecnh polymer h\u00f3a \u0111\u01b0\u1ee3c kh\u1edfi \u0111\u1ed9ng khi c\u00e1c ph\u00e2n t\u1eed t\u1ef1 do \u0111\u01b0\u1ee3c t\u1ea1o ra \u0111\u1ea1t t\u1edbi m\u1ed9t n\u1ed3ng \u0111\u1ed9 nh\u1ea5t \u0111\u1ecbnh . \u0110i\u1ec1u n\u00e0y \u0111\u00f2i h\u1ecfi m\u1ed9t s\u1ed1 l\u01b0\u1ee3ng photon c\u1ee5 th\u1ec3 \u0111\u01b0\u1ee3c h\u1ea5p th\u1ee5 b\u1edfi h\u1ec7 th\u1ed1ng kh\u1edfi \u0111\u1ed9ng, li\u00ean quan tr\u1ef1c ti\u1ebfp \u0111\u1ebfn b\u01b0\u1edbc s\u00f3ng, \u0111\u1ed9 m\u1ea1nh v\u00e0 th\u1eddi gian chi\u1ebfu s\u00e1ng. C\u00f3 th\u1ec3 c\u00f3 s\u1ef1 kh\u00e1c bi\u1ec7t \u0111\u00e1ng k\u1ec3 v\u1ec1 d\u1ea3i b\u01b0\u1edbc s\u00f3ng v\u00e0 \u0111\u1ed9 m\u1ea1nh gi\u1eefa c\u00e1c th\u01b0\u01a1ng hi\u1ec7u v\u00e0 lo\u1ea1i b\u00f3ng \u0111\u00e8n kh\u00e1c nhau. C\u00e1c \u0111\u00e8n QTH ph\u1ed5 bi\u1ebfn th\u01b0\u1eddng ph\u00e1t ra m\u1eadt \u0111\u1ed9 c\u00f4ng su\u1ea5t chi\u1ebfu trong kho\u1ea3ng t\u1eeb 300 \u0111\u1ebfn 1200 milliwatt\/cm2 (mW\/cm2) trong d\u1ea3i m\u00e0u t\u00edm-xanh, v\u00e0 kh\u00f4ng ph\u1ea3i l\u00e0 \u0111i\u1ec1u kh\u00f4ng b\u00ecnh th\u01b0\u1eddng khi hai th\u01b0\u01a1ng hi\u1ec7u kh\u00e1c nhau c\u00f3 \u0111\u1ed9 m\u1ea1nh kh\u00e1c nhau g\u1ea5p \u0111\u00f4i ho\u1eb7c nhi\u1ec1u h\u01a1n.<\/p>\n

          \u0110\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c s\u1ef1 tr\u00f9ng h\u1ee3p t\u1ed1i \u0111a, c\u1ea7n m\u1ed9t l\u01b0\u1ee3ng n\u0103ng l\u01b0\u1ee3ng v\u00e0o kho\u1ea3ng 16.000 millijoules\/cm2 (16 J\/cm2) cho m\u1ed9t l\u1edbp nh\u1ef1a d\u00e0y 2 mm. \u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c cung c\u1ea5p b\u1eb1ng c\u00e1ch chi\u1ebfu s\u00e1ng trong 40 gi\u00e2y v\u1edbi m\u1ed9t chi\u1ebfu s\u00e1ng ph\u00e1t ra 400 mW\/cm2 (40 gi\u00e2y \u00d7 400 mW\/cm2 = 16.000 mJ\/cm2 ho\u1eb7c 16 J\/cm2). C\u00f9ng k\u1ebft qu\u1ea3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111\u1ea1t \u0111\u01b0\u1ee3c b\u1eb1ng c\u00e1ch chi\u1ebfu s\u00e1ng trong 20 gi\u00e2y v\u1edbi 800 mW\/cm2 ho\u1eb7c chi\u1ebfu s\u00e1ng trong kho\u1ea3ng 13 gi\u00e2y v\u1edbi m\u1ed9t \u0111\u00e8n c\u00f3 c\u00f4ng su\u1ea5t 1200 mW\/cm2. Do \u0111\u00f3, t\u0103ng c\u00f4ng su\u1ea5t c\u1ee7a \u0111\u00e8n s\u1ebd t\u0103ng t\u1ed1c \u0111\u1ed9 v\u00e0 \u0111\u1ed9 m\u1ea1nh c\u1ee7a qu\u00e1 tr\u00ecnh polymer h\u00f3a. Tuy nhi\u00ean, qu\u00e1 tr\u00ecnh tr\u00f9ng h\u1ee3p nhanh h\u01a1n v\u1edbi ngu\u1ed3n s\u00e1ng c\u00f3 \u0111\u1ed9 m\u1ea1nh cao h\u01a1n c\u00f3 th\u1ec3 t\u0103ng \u1ee9ng su\u1ea5t co c\u1ee7a v\u1eadt li\u1ec7u.<\/p>\n

          2. \u0110\u1ed9 s\u00e2u tr\u00f9ng h\u1ee3p v\u00e0 th\u1eddi gian tr\u00f9ng h\u1ee3p<\/h2>\n

          G\u1ea7n \u0111\u00e2y, c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t \u0111\u00e3 gi\u1edbi thi\u1ec7u c\u00e1c \u0111\u00e8n QTH, PAC, laser v\u00e0 LED v\u1edbi \u0111\u1ed9 s\u00e1ng t\u0103ng \u0111\u00e1ng k\u1ec3 (l\u1edbn h\u01a1n 1000 mW\/cm2), m\u1edf ra kh\u1ea3 n\u0103ng gi\u1ea3m th\u1eddi gian chi\u1ebfu s\u00e1ng v\u00e0\/ho\u1eb7c \u0111\u1ed9 s\u00e2u tr\u00f9ng h\u1ee3p l\u1edbn h\u01a1n. \u0110\u00e2y l\u00e0 nh\u1eefng l\u1ee3i \u00edch \u0111\u01b0\u1ee3c mong mu\u1ed1n \u0111\u1ec3 c\u00f3 th\u1ec3 gi\u1ea3m thi\u1ec3u th\u1eddi gian \u0111i\u1ec1u tr\u1ecb ph\u1ee5c h\u1ed3i v\u00e0 chi ph\u00ed li\u00ean quan cho b\u1ec7nh nh\u00e2n. Tuy nhi\u00ean, s\u1ef1 h\u1ea5p th\u1ee5 v\u00e0 ph\u00e2n t\u00e1n \u00e1nh s\u00e1ng trong nh\u1ef1a composite gi\u1ea3m m\u1eadt \u0111\u1ed9 c\u00f4ng su\u1ea5t v\u00e0 \u0111\u1ed9 chuy\u1ec3n h\u00f3a (DC) m\u1ed9t c\u00e1ch m\u0169 logarit v\u1edbi \u0111\u1ed9 s\u00e2u th\u00e2m nh\u1eadp c\u1ee7a \u00e1nh s\u00e1ng.<\/p>\n

          C\u01b0\u1eddng \u0111\u1ed9 c\u00f3 th\u1ec3 gi\u1ea3m \u0111i t\u1eeb 10 \u0111\u1ebfn 100 l\u1ea7n trong m\u1ed9t l\u1edbp composite d\u00e0y 2 mm. \u0110i\u1ec1u n\u00e0y gi\u1ea3m qu\u00e1 tr\u00ecnh chuy\u1ec3n h\u00f3a monomer th\u00e0nh m\u1ee9c kh\u00f4ng ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c \u1edf \u0111\u1ed9 s\u00e2u l\u1edbn h\u01a1n 2 \u0111\u1ebfn 3 mm. Do \u0111\u00f3, b\u1ec1 m\u1eb7t ph\u1ea3i \u0111\u01b0\u1ee3c chi\u1ebfu s\u00e1ng trong th\u1eddi gian d\u00e0i h\u01a1n \u0111\u1ec3 cung c\u1ea5p m\u1eadt \u0111\u1ed9 c\u00f4ng su\u1ea5t \u0111\u1ee7 cho ph\u1ea7n d\u01b0\u1edbi b\u1ec1 m\u1eb7t. V\u1edbi gi\u1edbi h\u1ea1n \u0111\u01b0\u1ee3c \u00e1p \u0111\u1eb7t b\u1edfi s\u1ef1 ph\u00e2n t\u00e1n v\u00e0 h\u1ea5p th\u1ee5 \u00e1nh s\u00e1ng t\u1ef1 nhi\u00ean trong composite ph\u1ee5c h\u1ed3i hi\u1ec7n t\u1ea1i, s\u1ef1 \u0111\u00e1nh \u0111\u1ed5i l\u00e0 n\u1ebfu t\u0103ng c\u01b0\u1eddng \u0111\u1ed9 s\u00e1ng s\u1ebd cho ph\u00e9p th\u1eddi gian tr\u00f9ng h\u01a1pk ng\u1eafn h\u01a1n cho m\u1ed9t \u0111\u1ed9 s\u00e2u l\u1edbp composite nh\u1ea5t \u0111\u1ecbnh ho\u1eb7c t\u0103ng \u0111\u1ed9 s\u00e2u l\u1edbp composite tr\u00f9ng h\u1ee3p cho m\u1ed9t th\u1eddi gian chi\u1ebfu s\u00e1ng nh\u1ea5t \u0111\u1ecbnh, nh\u01b0ng kh\u00f4ng c\u00f3 l\u1ee3i g\u00ec khi c\u1ed1 g\u1eafng \u0111\u1ea1t c\u1ea3 hai c\u00f9ng l\u00fac. H\u1eadu qu\u1ea3 th\u1ef1c t\u1ebf l\u00e0 \u0111\u1ed9 s\u00e2u tr\u00f9ng h\u1ee3p b\u1ecb gi\u1edbi h\u1ea1n trong kho\u1ea3ng 2 \u0111\u1ebfn 3 mm tr\u1eeb khi s\u1eed d\u1ee5ng th\u1eddi gian chi\u1ebfu s\u00e1ng r\u1ea5t d\u00e0i, b\u1ea5t k\u1ec3 \u0111\u1ed9 s\u00e1ng c\u1ee7a \u0111\u00e8n. Nh\u1eefng gi\u1ea3i ph\u00e1p cho v\u1ea5n \u0111\u1ec1 n\u00e0y c\u00f3 kh\u1ea3 n\u0103ng s\u1ebd \u0111\u1ebfn t\u1eeb s\u1ef1 ti\u1ebfn b\u1ed9 trong h\u00f3a h\u1ecdc v\u00e0 c\u00f4ng ngh\u1ec7 c\u1ea5u tr\u00fac composite h\u01a1n l\u00e0 t\u1eeb s\u1ef1 ti\u1ebfn b\u1ed9 trong k\u1ef9 thu\u1eadt l\u00e2m s\u00e0ng ho\u1eb7c c\u00f4ng ngh\u1ec7 \u0111\u00e8n chi\u1ebfu s\u00e1ng.<\/p>\n

          S\u1ef1 gi\u1ea3m \u00e1nh s\u00e1ng c\u0169ng c\u00f3 th\u1ec3 kh\u00e1c nhau \u0111\u00e1ng k\u1ec3 gi\u1eefa c\u00e1c lo\u1ea1i composite kh\u00e1c nhau, t\u00f9y thu\u1ed9c, v\u00ed d\u1ee5, v\u00e0o t\u00ednh m\u1edd \u0111\u1ee5c, k\u00edch th\u01b0\u1edbc h\u1ea1t \u0111\u1ed9n, n\u1ed3ng \u0111\u1ed9 h\u1ea1t \u0111\u1ed9n v\u00e0 m\u00e0u s\u1eafc. Nh\u01b0 \u0111\u00e3 m\u00f4 t\u1ea3 tr\u01b0\u1edbc \u0111\u00f3, c\u00e1c m\u00e0u s\u1eafc \u0111\u1eadm v\u00e0\/ho\u1eb7c nh\u1ef1a kh\u00f4ng trong su\u1ed1t y\u00eau c\u1ea7u th\u1eddi gian tr\u00f9ng h\u1ee3p l\u00e2u h\u01a1n. V\u00ec nh\u1eefng l\u00fd do n\u00e0y, c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t th\u01b0\u1eddng \u0111\u1ec1 xu\u1ea5t th\u1eddi gian tr\u00f9ng h\u1ee3p d\u1ef1a tr\u00ean m\u1ed9t thi\u1ebft b\u1ecb tr\u00f9ng h\u1ee3p c\u1ee5 th\u1ec3 cho m\u1ed7i m\u00e0u s\u1eafc v\u00e0 lo\u1ea1i composite. Nh\u1eefng th\u1eddi gian \u0111\u01b0\u1ee3c \u0111\u1ec1 xu\u1ea5t n\u00e0y th\u01b0\u1eddng l\u00e0 th\u1eddi gian t\u1ed1i thi\u1ec3u tuy\u1ec7t \u0111\u1ed1i. \u0110\u1ec3 t\u1ed1i \u0111a h\u00f3a c\u1ea3 \u0111\u1ed9 polymer h\u00f3a v\u00e0 \u0111\u1ed9 b\u1ec1n l\u00e2m s\u00e0ng d\u00e0i h\u1ea1n, b\u00e1c s\u0129 nha khoa n\u00ean \u0111i\u1ec1u ch\u1ec9nh th\u1eddi gian chi\u1ebfu s\u00e1ng v\u00e0 k\u1ef9 thu\u1eadt tr\u00f9ng h\u1ee3p cho ph\u00f9 h\u1ee3p v\u1edbi \u0111\u1ed9 s\u00e1ng c\u1ee7a ngu\u1ed3n \u00e1nh s\u00e1ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng. \u00c1nh s\u00e1ng c\u0169ng b\u1ecb h\u1ea5p th\u1ee5 v\u00e0 ph\u00e2n t\u00e1n khi \u0111i qua c\u1ea5u tr\u00fac r\u0103ng, \u0111\u1eb7c bi\u1ec7t l\u00e0 l\u1edbp men, g\u00e2y ra s\u1ef1 tr\u00f9ng h\u1ee3p kh\u00f4ng \u0111\u1ea7y \u0111\u1ee7 \u1edf nh\u1eefng v\u00f9ng quan tr\u1ecdng nh\u01b0 l\u1ed7 tr\u00e1m m\u1eb7t b\u00ean. Do \u0111\u00f3, khi c\u1ed1 g\u1eafng tr\u00f9ng h\u1ee3p composite th\u00f4ng qua c\u1ea5u tr\u00fac r\u0103ng, th\u1eddi gian chi\u1ebfu s\u00e1ng n\u00ean \u0111\u01b0\u1ee3c t\u0103ng l\u00ean t\u1eeb 2 \u0111\u1ebfn 3 l\u1ea7n \u0111\u1ec3 b\u00f9 \u0111\u1eafp cho s\u1ef1 gi\u1ea3m m\u1eadt \u0111\u1ed9 \u00e1nh s\u00e1ng.<\/p>\n

          \u0110\u1ed1i v\u1edbi \u0111\u00e8n halogen (QHT), \u0111\u1ed9 s\u00e1ng \u0111\u1eb7c bi\u1ec7t d\u1ec5 b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi tu\u1ed5i th\u1ecd c\u1ee7a ngu\u1ed3n \u00e1nh s\u00e1ng. \u0110\u1ed1i v\u1edbi t\u1ea5t c\u1ea3 c\u00e1c lo\u1ea1i \u0111\u00e8n, h\u01b0\u1edbng c\u1ee7a \u0111\u1ea7u \u0111\u00e8n v\u00e0 kho\u1ea3ng c\u00e1ch qu\u00e1 l\u1edbn gi\u1eefa \u0111\u1ea7u \u0111\u00e8n v\u00e0 mi\u1ebfng tr\u00e1m ph\u1ee5c h\u1ed3i s\u1ebd gi\u1ea3m \u0111\u1ed9 s\u00e1ng. M\u1ed9t s\u1ed1 cu\u1ed9c kh\u1ea3o s\u00e1t \u0111\u00e3 cho th\u1ea5y c\u00e1c thi\u1ebft b\u1ecb tr\u00f9ng h\u1ee3p \u1edf nhi\u1ec1u ph\u00f2ng kh\u00e1m nha khoa tr\u00ean kh\u1eafp th\u1ebf gi\u1edbi kh\u00f4ng cung c\u1ea5p \u0111\u1ed9 s\u00e1ng \u0111\u1ee7. \u0110\u00e8n s\u1ee3i \u0111\u1ed1t, LED, b\u1ed9 ph\u1eadn ph\u1ea3n x\u1ea1 v\u00e0 b\u1ed9 l\u1ecdc n\u1ed9i b\u1ed9 trong c\u00e1c \u0111\u01a1n v\u1ecb chi\u1ebfu s\u00e1ng nha khoa c\u1ee7a t\u1ea5t c\u1ea3 c\u00e1c lo\u1ea1i \u0111\u00e3 \u0111\u01b0\u1ee3c ch\u1ee9ng minh l\u00e0 gi\u1ea3m \u0111\u1ed9 s\u00e1ng khi s\u1eed d\u1ee5ng. Ngo\u00e0i ra, ti\u1ec7t tr\u00f9ng b\u1eb1ng nhi\u1ec7t \u0111\u1ed9 cao, s\u1eed d\u1ee5ng c\u00e1c ch\u1ea5t kh\u1eed tr\u00f9ng ho\u1eb7c v\u1eadt li\u1ec7u ph\u1ee5c h\u1ed3i b\u00e1m v\u00e0o \u0111\u1ea7u \u0111\u00e8n c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m \u0111\u00e1ng k\u1ec3 \u0111\u1ed9 s\u00e1ng.<\/p>\n

          Do \u0111\u00f3, \u0111\u1ed9 s\u00e1ng c\u1ee7a \u0111\u00e8n n\u00ean \u0111\u01b0\u1ee3c ki\u1ec3m tra th\u01b0\u1eddng xuy\u00ean v\u00e0 ng\u01b0\u1eddi \u0111i\u1ec1u h\u00e0nh n\u00ean lu\u00f4n \u0111\u1eb7t \u0111\u1ea7u \u0111\u00e8n c\u00e0ng g\u1ea7n c\u00e0ng t\u1ed1t vu\u00f4ng g\u00f3c v\u1edbi v\u1eadt li\u1ec7u ph\u1ee5c h\u1ed3i v\u00e0 gi\u1eef kho\u1ea3ng c\u00e1ch v\u00e0 h\u01b0\u1edbng n\u00e0y trong su\u1ed1t th\u1eddi gian chi\u1ebfu s\u00e1ng. Trong c\u00e1c nghi\u00ean c\u1ee9u \u0111\u01b0\u1ee3c b\u00e1o c\u00e1o trong n\u0103m 2010 v\u00e0 2011, Price v\u00e0 \u0111\u1ed3ng nghi\u1ec7p \u0111\u00e3 ch\u1ec9 ra r\u1eb1ng \u0111\u00e0o t\u1ea1o chuy\u00ean m\u00f4n v\u1ec1 nh\u1eefng chi ti\u1ebft li\u00ean quan \u0111\u1ebfn k\u1ef9 thu\u1eadt n\u00e0y c\u1ea3i thi\u1ec7n \u0111\u00e1ng k\u1ec3 m\u1ee9c \u0111\u1ed9 chuy\u1ec3n h\u00f3a monomer th\u00e0nh polymer trong mi\u1ec7ng.<\/p>\n

          T\u00f3m l\u1ea1i, k\u1ef9 thu\u1eadt v\u00e0 b\u1ea3o tr\u00ec \u0111\u00e8n r\u1ea5t quan tr\u1ecdng:<\/h3>\n
            \n
          • C\u1ea7n ch\u1ecdn lo\u1ea1i \u0111\u00e8n tr\u00f9ng h\u1ee3p c\u00f3 d\u1ea3i b\u01b0\u1edbc s\u00f3ng tr\u00f9ng kh\u1edbp m\u1ea1nh v\u1edbi d\u1ea3i h\u1ea5p th\u1ee5 c\u1ee7a h\u1ec7 th\u1ed1ng tr\u00f9ng h\u1ee3p quang h\u1ecdc c\u1ee7a composite.<\/li>\n
          • \u0110\u1ed9 m\u1ea1nh c\u1ee7a \u00e1nh s\u00e1ng gi\u1ea3m d\u1ea7n theo kho\u1ea3ng c\u00e1ch theo t\u1ef7 l\u1ec7 h\u1ec7 s\u1ed1 m\u0169 logarit; do \u0111\u00f3, \u0111\u1ea7u \u0111\u00e8n ph\u1ea3i \u0111\u01b0\u1ee3c \u0111\u1eb7t v\u00e0 gi\u1eef \u1edf kho\u1ea3ng c\u00e1ch t\u1ed1i thi\u1ec3u c\u00f3 th\u1ec3 trong su\u1ed1t th\u1eddi gian chi\u1ebfu s\u00e1ng (20 gi\u00e2y ho\u1eb7c h\u01a1n).<\/li>\n
          • G\u00f3c chi\u1ebfu s\u00e1ng l\u00e0 quan tr\u1ecdng, v\u00ec \u0111\u1ed9 m\u1ea1nh t\u1ed1i \u0111a \u0111\u01b0\u1ee3c \u0111\u01b0a v\u00e0o vu\u00f4ng g\u00f3c (90\u00b0) v\u1edbi b\u1ec1 m\u1eb7t nh\u1ef1a, do \u0111\u00f3, \u0111\u1ea7u \u0111\u00e8n ph\u1ea3i \u0111\u01b0\u1ee3c \u0111\u1eb7t v\u00e0 gi\u1eef \u1edf g\u1ea7n 90\u00b0 trong su\u1ed1t th\u1eddi gian chi\u1ebfu s\u00e1ng.<\/li>\n
          • \u0110\u1ed9 m\u1ea1nh c\u1ee7a \u0111\u00e8n ph\u1ea3i \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 th\u01b0\u1eddng xuy\u00ean v\u00e0 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o l\u01b0\u1ee3ng n\u0103ng l\u01b0\u1ee3ng b\u1ee9c x\u1ea1 \u0111\u1ee7 (kho\u1ea3ng 16 J\/cm2) cho qu\u00e1 tr\u00ecnh tr\u00f9ng h\u1ee3p \u0111\u1ea7y \u0111\u1ee7.<\/li>\n
          • C\u1ea7n \u0111\u00e0o t\u1ea1o \u0111\u1ec3 ph\u00e1t tri\u1ec3n c\u00e1c k\u1ef9 thu\u1eadt t\u1ed1t nh\u1ea5t cho qu\u00e1 tr\u00ecnh quang tr\u00f9ng h\u1ee3p trong mi\u1ec7ng.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"

            Composite, c\u1ee5 th\u1ec3 h\u01a1n l\u00e0 composite quang tr\u00f9ng h\u1ee3p 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, \u0111\u1ea3m b\u1ea3o mi\u1ebfng tr\u00e1m c\u00f3 […]<\/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":"\nC\u00e1c y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng qu\u00e1 tr\u00ecnh tr\u00f9ng h\u1ee3p c\u1ee7a composite - Vinmec<\/title>\n<meta name=\"description\" content=\"Composite l\u00e0 l\u1ef1a ch\u1ecdn ph\u1ed5 bi\u1ebfn c\u1ee7a b\u00e1c s\u0129 nha khoa. N\u1eafm r\u00f5 c\u00e1c y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn quang tr\u00f9ng h\u1ee3p composite \u0111\u1ec3 th\u1ef1c h\u00e0nh l\u00e2m s\u00e0ng t\u1ed1t!\" \/>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"C\u00e1c y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng qu\u00e1 tr\u00ecnh tr\u00f9ng h\u1ee3p c\u1ee7a composite - Vinmec\" \/>\n<meta property=\"og:description\" content=\"Composite l\u00e0 l\u1ef1a ch\u1ecdn ph\u1ed5 bi\u1ebfn c\u1ee7a b\u00e1c s\u0129 nha khoa. 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