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Ethylene Glycol À¯»çü°¡ ŻȸµÈ »ó¾ÆÁúÀÇ ¹°¸®Àû ¼ºÁú¿¡ ¹ÌÄ¡´Â ¿µÇâ

THE EFFECT OF ETHYLENE GLYCOL ANALOGS ON MECHANICAL PROPERTIES OF MOIST DEMINERALIZED DENTIN MATRIX

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ÀÌ°æÇÏ, Á¶¿µ°ï, À̱¤¿ø,
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ÀÌ°æÇÏ ( Lee Kyung-Ha ) - ÀüºÏ´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Á¸Çб³½Ç
Á¶¿µ°ï ( Cho Young-Gon ) - Á¶¼±´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Á¸Çб³½Ç
À̱¤¿ø ( Lee Kwang-Won ) - ÀüºÏ´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Á¸Çб³½Ç

Abstract

º» ¿¬±¸¿¡¼­´Â »ó¾ÆÁúÀÇ Ç׺¹ÀÎÀå°­µµ (UTS)³ª ź¼º°è¼ö (E)¿Í °°Àº ¹°¸®Àû Ư¼ºÀÌ Àû¿ëµÈ ¿ë¸ÅƲÀÇ °¢°¢¿¡ ´ëÇÑ HoyÀÇ ¼ö¼Ò°áÇÕ ¿ëÇصµ ¸Å°³º¯¼ö¿¡ ¹Ýºñ·ÊÇÑ´Ù´Â °¡¼³À» ¼³Á¤ÇÏ°í ½ÇÇèÇÑ °á°ú °¡¼³ÀÌ ÀÔÁõµÇ¾úÀ¸¸ç À̸¦ Åä´ë·Î ´ÙÀ½°ú °°Àº °á·ÐÀ» À¯µµÇÏ¿© º¸¾Ò´Ù. ù°´Â ŻȸµÈ »ó¾ÆÁúÀÇ ÀÎÀå Ư¼º ¹× ¹°¼ºÀÌ °¡ÇØÁø ±Ø¼º ¿ë¸ÅÀÇ ¼ö¼Ò°áÇÕ´É¿¡ ¹ÐÁ¢È÷ ¿¬°üµÇ¾î ÀÖ´Ù´Â °ÍÀ̸ç, µÑ°´Â ³·Àº ¼ö¼Ò°áÇÕ´ÉÀ» °¡Áø ¿ë¸Å´Â ±³¿ø¼¶À¯ Ãþ ³»¿¡¼­ »õ·Î¿î ÆéŸÀ̵尣 ¼ö¼Ò°áÇÕÀ» À¯µµÇÔÀ¸·Î½á ŻȸµÈ »ó¾ÆÁúÀÇ ÀÎÀå·Â ¹× ź¼º°è¼ö¸¦ Áõ°¡½ÃŲ´Ù´Â °á°úÀÌ´Ù. ¼Â°·Î´Â ÀÌ·¯ÇÑ °á°úµéÀ» Åä´ë·Î ³ôÀº ¼ö¼Ò°áÇÕ´ÉÀ» °¡Áø ¿ë¸ÅµéÀº »õ·Î¿î ÆéŸÀ̵尣 ¼ö¼Ò°áÇÕÀÇ Çü¼ºÀ» Â÷´ÜÇÏ¿© ŻȸµÈ »ó¾ÆÁúÀÇ ±¸Á¶Àû Ư¼ºÀ» À¯Áö½Ãų ¼ö ÀÖ´Ù´Â °á·ÐÀ» µµÃâÇÏ¿´´Ù.

Objectives: The purpose of this study is to evaluate the effect of ethylene glycol analogs on modulus of elasticity and ultimate tensile strength of moist, demineralized dentin matrix.

Methods: Dentin disks 0.5 mrn thick were prepared from mid-coronal dentin of extracted. unerupted, human third molars. ¡¯¡¯I¡¯¡¯ beam and hour-glass shaped specimens were prepared from the disks, the ends protected with nail varnish and the central regions completely demineralized in 0.5M EDTA for 5 days. Ultimate tensile stress (UTS) and low strain modulus of elasticity (E) were determined with specimens immersed for 60 min in distilled water (H2O), ethylene glycol (HO-CH2-CH2-OH), 2-methoxyethanol (H3CO-CH2-CH2-OH), and 1,2-dimethoxyethane (H3CO-CH2-CH3-OCH3) prior to testing in those same media. Modulus of elasticity was measured on the same specimens in a repeated measures experimental design. The results were analyzed with a one-way ANOVA on ranks, followed by Dunn¡¯¡¯s test at alpha=;0.05. Regression analysis examined the relationship between UTS or E and hoy¡¯¡¯s solubility parameter for hydrogen bonding (delta h) of each solvent.

Results: The UTS of demineralized dentin in water, ethylene glycol, 2-methoxyethanol, and 1,2-dimethoxyethane was 24 (3), 30 (5), 37 (6), and 45 (6) MPa, X (SD) N = 10. Low strain E for the same media were 16 (13), 23 (14), 52 (24), and 62 (22) MPa. Regression analysis of UTS vs delta h revealed a significant (p < 0.0001,r = -0.99,R2 = 0.98) inverse, exponential relationship. A similar inverse relationship was obtained between low strain E vs delta h(p < 0.0005, r = -0.93, R2 = 0.86).

Significance: The tensile properties of demineralized dentin are dependent upon the hydrogen bonding ability of polar solvents (delta h). Solvents with low delta h values may permit new interpeptide H-bonding in collagen that increases its tensile properties. Solvents with high delta h values prevent the development of these new interpeptide H-bonds.

Å°¿öµå

±Ø¼º¿ë¸Å;Ethylene Glycol À¯»çü;¼ö¼Ò°áÇÕ´É
Polar Solvents;Ethylene Glycol Analogs;Hydrogen Bonding Ability

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