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Evaluation of titanium surface properties by Nd: YVO4 laser irradiation: pilot study

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¼­À±Á¤ ( Seo Yoon-Jeong ) - Àü³²´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø º¸Ã¶Çб³½Ç
¹Ú»ó¿ø ( Park Sang-Won ) - Àü³²´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø º¸Ã¶Çб³½Ç

Abstract

¿¬±¸ ¸ñÀû: º» ¿¬±¸´Â ¼­·Î ´Ù¸¥ ¼¼°¡Áö ºí¶ó½ºÆà 󸮸¦ ÇÑ Æ¼Å¸´½ µð½ºÅ©¿¡Nd:YVO4 ·¹ÀÌÀú Á¶»ç Á¶°ÇÀ» ´Þ¸®ÇÑ ÈÄ Á¶»çÇÏ¿© ƼŸ´½ÀÇ Ç¥¸é °ÅÄ¥±â ¹× Ç¥¸é º¯È­¸¦ °üÂûÇϱâ À§ÇÔÀÌ´Ù.

¿¬±¸ Àç·á ¹× ¹æ¹ý:µð½ºÅ© ÇüÅÂÀÇ »ó¿ë ¼ø¼ö ƼŸ´½ ½ÃÆíÀ» 30°³ ÁغñÇÏ¿© ½Ã·á Ç¥¸éÀ» °¢°¢ 10°³¾¿ ZrO2 (zirconium dioxide), Al2O3 (aluminium oxide), RBM (resorbable blasted media) À¸·Î ºí¶ó½ºÆÃ(blasting)ÇÏ°í ÃÊÀ½ÆÄ ¼¼Ã´ÇÏ¿´´Ù. Nd:YVO4 ·¹ÀÌÀú(Laser Pro D-20, Laserval Korea(R), Seoul, South Korea)¿¡¼­ ÁÖ»ç¼Óµµ(100, 300, 500 mm/s)¿Í ½Ã°£´ç Áøµ¿·®(¹Ýº¹·ü) (5, 15, 35 kHz)À» ´Ù¸£°Ô ÇÏ¿© 9°¡Áö Á¶°ÇÀ» ¼³Á¤ÇÏ¿´´Ù. ·¹ÀÌÀú Á¶»ç ÈÄ ÁÖ»çÀüÀÚÇö¹Ì°æ, X-¼± ȸÀý ºÐ¼® ¹× ¿¡³ÊÁö ºÐ»êX¼± ºÐ±¤ºÐ¼®, Ç¥¸é °ÅÄ¥±â ºÐ¼®À» ÅëÇØ °¢ ½ÃÆíÀ» Æò°¡ÇÏ°í ºÐ¼®ÇÏ¿´´Ù.

°á°ú: ÁÖ»çÀüÀÚÇö¹Ì°æÀÇ °á°ú ·¹ÀÌÀú Á¶»ç¸¦ ½ÃÇàÇÏÁö ¾ÊÀº ƼŸ´½ Ç¥¸éÀº ¹æÇ⼺ÀÌ ¾ø´Â ºÒ±ÔÄ¢ÇÑ Çü»óÀ» º¸¿´°í ·¹ÀÌÀú Á¶»ç¸¦ ó¸®ÇÑ ½ÃÆíÀº Ư¡ÀûÀÎ ÇüÅ°¡ °üÂûµÇ¾ú´Ù. X-¼±È¸ÀýºÐ¼®°á°úZrO2, RBM ÀÇ °íÀ¯ÇÇÅ©´Â °üÂûµÇÁö ¾Ê¾ÒÀ¸³ª Al2O3ºÐ»çÇÑ ±º¿¡¼­´Â ¾Ë·ç¹Ì³ªÀÇ °íÀ¯ ÇÇÅ©°¡ °üÂûµÇ¾ú´Ù. ¿¡³ÊÁö ºÐ»êX¼± ºÐ±¤ºÐ¼®À» ÅëÇØ °üÂûÇÑ Æ¼Å¸´½ÀÇ »êÈ­µµ °æÇ⼺°ú Ç¥¸é °ÅÄ¥±â´Â À¯»çÇÏ¿´´Ù. Ç¥¸é °ÅÄ¥±â´Â ÁÖ»ç¼Óµµ¿Í ¹Ýº¹·ü¿¡ µû¸¥ Â÷À̸¦ º¸¿´´Ù(P<.05).

°á·Ð: ·¹ÀÌÀú Á¶»ç Á¶°Ç¿¡ µû¶ó ƼŸ´½ µð½ºÅ©ÀÇ ¹Ì¼¼±¸Á¶¿Í Ç¥¸é °ÅÄ¥±â°¡ º¯È­µÇ¾ú´Ù. ·¹ÀÌÀú Á¶»ç´Â °ñÀ¯ÂøÀ» ÁõÁø½ÃÅ°±â À§ÇÑ ÀÓÇöõÆ® Ç¥¸éÀ» º¯È­½ÃÅ°´Â ¹æ¹ýÁßÀÇ Çϳª·Î ¿©±æ ¼ö ÀÖÀ» °ÍÀÌ´Ù.

PURPOSE: This study was conducted to evaluate the roughness and surface alternations of three differently blasted titanium discs treated by Nd: YVO4 Laser irradiation in different conditions.

MATERIALS AND METHODS: Thirty commercially pure titanium discs were prepared and divided into three groups. Each group was consisted of 10 samples and blasted by ZrO2 (zirconium dioxide), Al2O3 (aluminum oxide), and RBM (resorbable blasted media). All the samples were degreased by ultrasonic cleaner afterward. Nine different conditions were established by changing scanning speed (100, 300, 500 mm/s) and repetition rate (5, 15, 35 kHz) of Nd: YVO4 Laser (Laser Pro D-20, Laserval Korea(R), Seoul, South Korea). After laser irradiation, a scanning electron microscope, X-ray diffraction analysis, energy dispersive X-ray spectroscopic analysis, and surface roughness analysis were used to assess the roughness and surface alternations of the samples.

RESULTS: According to a scanning electron microscope (SEM), titanium discs treated with laser irradiation showed characteristic patterns in contrast to the control which showed irregular patterns. According to the X-ray diffraction analysis, only Al2O3 group showed its own peak. The oxidation tendency and surface roughness of titanium were similar to the control in the energy dispersive X-ray spectroscopic analysis. The surface roughness was inversely proportional to the scanning speed, whereas proportional to the repetition rate of Nd: YVO4.

CONCLUSION: The surface microstructures and roughness of the test discs were modified by the radiation of Nd: YVO4 laser. Therefore, laser irradiation could be considered one of the methods to modify implant surfaces for the enhancement of osseointegration.

Å°¿öµå

Nd:YVO4 ·¹ÀÌÀú; ƼŸ´½Ç¥¸é; ºí¶ó½ºÆøÅü
Nd: YVO4 laser; Titanium surface; Blasting media

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