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The effects of short-term application of calcium hydroxide on dentin fracture strength

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½ÅÀºÁ¤ ( Shin Eun-Jung ) - Àü³²´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø
À̺󳪠( Lee Bin-Na ) - Àü³²´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø º¸Á¸Çб³½Ç
ÀåÁöÇö ( Jang Ji-Hyun ) - Àü³²´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø º¸Á¸Çб³½Ç
ÀåÈÆ»ó ( Chang Hoon-Sang ) - Àü³²´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø º¸Á¸Çб³½Ç
ȲÀγ² ( Hwang In-Nam ) - Àü³²´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø º¸Á¸Çб³½Ç
¿À¿ø¸¸ ( Oh Won-Mann ) - Àü³²´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø º¸Á¸Çб³½Ç
ȲÀ±Âù ( Hwang Yun-Chan ) - Àü³²´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø º¸Á¸Çб³½Ç
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Abstract

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¿¬±¸ Àç·á ¹× ¹æ¹ý: ´ÜÀÏ Ä¡±ÙÀ» °¡Áö¸ç, À¯»çÇÑ Å©±â ¹× »ó¾ÆÁú µÎ²²¸¦ º¸ÀÌ°í, ¿ì½ÄÀ̳ª ¼öº¹¹°ÀÌ ¾ø´Â 32°³ÀÇ ÇÏ¾Ç ¼Ò±¸Ä¡¸¦ ÀÌ¿ëÇÏ¿´´Ù. 16°³ÀÇ Ä¡¾Æ¿¡´Â ¼ö»êÈ­ Ä®½·À» ÃæÀüÇÑ ÈÄ Àӽð¡ºÀ ÇÏ¿´°í, ³ª¸ÓÁö 16°³ÀÇ Ä¡¾Æ´Â ´ëÁ¶±ºÀ¸·Î¼­ ÃæÀüÇÏÁö ¾ÊÀº »óÅ¿¡¼­ Àӽð¡ºÀ ÇÏ¿´´Ù. ¸ðµç ½ÃÆíÀÇ Ä¡±Ù´ÜÀ» ·¹ÁøÀ¸·Î ¹ÐºÀÇÑ ÈÄ, ½Ä¿°¼ö¿¡ º¸°üÇÏ¿´´Ù. 1ÁÖ¿Í 4ÁÖ ÈÄ¿¡ ½ÃÆíÀ» ÆÄÀý½ÃÅ°±â À§ÇØ ÇÊ¿äÇÑ ÈûÀÇ ÃÖ´ë°ªÀ» ÃøÁ¤ÇÏ¿© Åë°èÇÐÀûÀ¸·Î ºÐ¼®ÇÏ¿´´Ù.

°á°ú: 1ÁÖ, 4ÁÖ ÈÄ µÎ ±×·ìÀÇ Æò±Õ ÆÄÀý°­µµ´Â À¯»çÇÏ¿´´Ù. ¼ö»êÈ­ Ä®½·À» ±Ù°ü ³»¿¡ 4ÁÖ°£ Àû¿ëÇÑ °æ¿ì¿¡´Â ÆÄÀý°­µµ°¡ ´ëÁ¶±º¿¡ ºñÇØ 8.2% °¨¼ÒÇÏ¿´´Ù. ±×·¯³ª Åë°èÇÐÀûÀ¸·Î ½ÇÇ豺°£, ½Ã°£´ëº° À¯ÀÇÇÑ Â÷ÀÌ´Â º¸ÀÌÁö ¾Ê¾Ò´Ù.

°á·Ð: ¼ö»êÈ­ Ä®½·À» ´Ü±â°£ Àû¿ëÇÒ °æ¿ì Ä¡¾ÆÀÇ ÆÄÀý°­µµ¿¡ Å« ¿µÇâÀ» ¹ÌÄ¡Áö ¾Ê´Â´Ù. µû¶ó¼­, ±Ù°üÄ¡·á °úÁ¤ µ¿¾È ¼ö»êÈ­ Ä®½·À» ´Ü±â°£À¸·Î Àû¿ëÇÒ ¼ö ÀÖ´Ù.

Objectives: This in vitro study investigated whether short-term application of calcium hydroxide in the root canal system for 1 and 4 wk affects the fracture strength of human permanent teeth.

Materials and Methods: Thirty two mature human single rooted mandibular premolars in similar size and dentin thickness without decay or restorations were hand and rotary instrumented and 16 teeth vertically packed with calcium hydroxide paste and sealed coronally with caviton to imitate the endodontic procedure and the other 16 teeth was left empty as a control group. The apicies of all the samples were sealed with resin, submerged in normal saline and put in a storage box at to mimic the oral environment. After 1 and 4 wk, 8 samples out of 16 samples from each group were removed from the storage box and fracture strength test was performed. The maximum load required to fracture the samples was recorded and data were analysed statistically by the two way ANOVA test at 5% significance level.

Results: The mean fracture strengths of two groups after 1 wk and 4 wk were similar. The intracanal placement of calcium hydroxide weakened the fracture strength of teeth by 8.2% after 4 wk: an average of 39.23 MPa for no treatment group and 36.01 MPa for CH group. However there was no statistically significant difference between experimental groups and between time intervals.

Conslusions: These results suggest that short term calcium hydroxide application is available during endodontic treatment.

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Calcium hydroxide; Dentin; Fracture strength; Short term application

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