¿¿¬ÈÁÖÀÔÇü gutta percha¿Í resilonÀÇ À¯º¯ÇÐÀû Ư¼º
Rheological characterization of thermoplasticized injectable gutta percha and resilon
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ÀåÁÖÇý ( Chang Ju-Hea ) - ¼¿ï´ëÇб³ Ä¡°úº´¿ø Àå¾ÖÀבּ¸½Ç
¹é½ÂÈ£ ( Baek Seung-Ho ) - ¼¿ï´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø Ä¡°úº¸Á¸Çб³½Ç
ÀÌÀκ¹ ( Lee In-Bog ) - ¼¿ï´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø Ä¡°úº¸Á¸Çб³½Ç
KMID : 0362320110360050377
Abstract
¿¬±¸¸ñÀû: º» ¿¬±¸ÀÇ ¸ñÀûÀº ¿¿¬ÈÁÖÀÔÇü gutta percha¿Í resilonÀÇ ¿Âµµ º¯È¿¡ µû¸¥ Á¡Åº¼º º¯È¸¦ °üÂûÇÏ°í Á¶ÀÛ¼ºÀ» ºñ±³Çϱâ À§ÇÔÀÌ´Ù.
¿¬±¸ Àç·á ¹× ¹æ¹ý: Obtura-II ½Ã½ºÅÛÀ» ÀÌ¿ëÇÏ¿© ¼¼ Á¾·ùÀÇ gutta percha¿Í resilonÀ» ¿Í ·Î °¡¿ÇÑ ÈÄ »çÃ⠿µµ¸¦ ÃøÁ¤ÇÏ¿´´Ù. Á¡µµ°è¸¦ ÀÌ¿ëÇÏ¿© ¿Âµµ º¯È¿¡ µû¸¥ Àç·áµéÀÇ Á¡Åº¼º Ư¼º(Àü´Üź¼º°è¼ö, G¡¯; Àü´ÜÁ¡¼º°è¼ö, G"; ¼Õ½Ç źÁ¨Æ®, tan; º¹¼ÒÁ¡µµ, )À» °üÂûÇÏ¿´´Ù. Á¡µµ°è¿Í Â÷µ¿ÁÖ»ç¿ÃøÁ¤±â(DSC)·Î Àç·áµéÀÇ »óÀüÀÌ ¿Âµµ¸¦ ÃøÁ¤ÇÏ¿´°í °¡¾Ð¹ýÀ¸·Î ¿Í ¿¡¼ Àç·áµéÀÇ Á¡Á¶µµ¸¦ ºñ±³ÇÏ¿´´Ù.
°á°ú: ¼¼ Á¾ÀÇ gutta perchas´Â ¿Âµµ¿¡ µû¶ó ¼·Î ´Ù¸¥ Á¡Åº¼º Ư¼ºÀ» ³ªÅ¸³Â´Ù. ¿¡¼ ¿¬ÈµÈ Àç·áÀÇ °íÃ¼È »óº¯ÀÌ°¡ ÀϾ°í, Á¡µµ°è¿Í DSC·Î ÃøÁ¤µÈ »óº¯ÀÌ ½ÃÀÛ ¿Âµµ´Â À¯»çÇÏ¿´´Ù. »óº¯ÀÌ ½ÃÀÛ ¿Âµµ¿Í °¡¾Ð ½Ã Á¡Á¶µµ´Â Àç·áµé¸¶´Ù Â÷À̸¦ º¸¿´´Ù(p < 0.05). ResilonÀº gutta percha¿Í ºñ½ÁÇÑ À¯º¯ÇÐÀû Ư¼ºÀ» º¸¿´´Ù.
°á·Ð: ¿¿¬ÈµÈ ±Ù°üÃæÀüÀç´Â ³Ã°¢°úÁ¤ µ¿¾È À¯º¯ÇÐÀû Ư¼ºÀÇ º¯È¸¦ ³ªÅ¸³Â°í Àç·áµé¸¶´Ù ¼·Î ´Ù¸¥ Á¡Åº¼º Ư¼ºÀº ±Ù°ü ³»ÁÖÀÔ ½Ã¿Í ÃæÀü ½Ã ¼·Î ´Ù¸¥ Á¶ÀÛ¼ºÀ» º¸ÀÓÀ» ¾Ë ¼ö ÀÖ´Ù.
Objectives: The purpose of this study was to observe the change in the viscoelastic properties of thermoplasticized injectable root canal filling materials as a function of temperature and to compare the handling characteristics of these materials.
Materials and Methods: Three commercial gutta perchas and Resilon (Pentron Clinical Technologies) in a pellet form were heated in the Obtura-II system (Obtura Spartan) at and , and the extrusion temperature of the thermoplasticized materials was measured. The viscoelastic properties of the materials as a function of temperature were evaluated using a rheometer. The elastic modulus G¡¯, viscous modulus G", loss tangent tan, and complex viscosity were determined. The phase transition temperature was determined by both the rheometer and a differential scanning calorimeter (DSC). The consistency of the materials was compared under compacting pressure at and by a squeeze test.
Results: The three gutta perchas had dissimilar profiles in viscoelastic properties with varying temperature. The phase transition of softened materials into solidification occurred at to , and the onset temperatures obtained by a rheometer and a DSC were similar to each other. The onset temperature of phase transition and the consistency upon compaction pressure were different among the materials (p < 0.05). Resilon had a rheologically similar pattern to the gutta perchas, and was featured between high and low-flow gutta perchas.
Conclusions: The rheological characteristics of the thermoplasticized root canal filling materials changed under a cooling process. The dissimilar viscoelastic properties among the materials require different handling characteristics during an injecting and compacting procedure.
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¿¿¬ÈÁÖÀÔÇü; Á¡µµ°è; Á¡Åº¼º; Â÷µ¿ÁÖ»ç¿ÃøÁ¤±â
Differential scanning calorimeter (DSC); Gutta percha; Resilon; Rheometer; Thermoplasticized; Viscoelastic
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