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The Effects of Screw Retained Prosthesis Misfit & Cantilever on Stress Distribution in Bone Around the Implant
ÀÌÀçÀÎ, ±èÅ¿µ, Á¶Çý¿ø,
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ÀÌÀçÀÎ ( Lee Jae-In ) - ¿ø±¤´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Ã¶Çб³½Ç
±èÅ¿µ ( Kim Tae-Young ) - ¿ø±¤´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Ã¶Çб³½Ç
Á¶Çý¿ø ( Cho Hye-Won ) - ¿ø±¤´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Ã¶Çб³½Ç
KMID : 1004520130290030224
Abstract
ÀÓÇöõÆ®ÀÇ Àå±âÀûÀÎ ¼º°øÀ» À§ÇØ °íÁ¤Ã¼ÀÇ ÇüÅÂ, ¿Ü°úÀû ¼ú½Ä, °ñÁ¶Á÷ÀÇ Á¶°Ç, º¸Ã¶¹° ÀûÇÕ¼º, ÁÖ±âÀûÀÎ °Ë»ç, ȯÀÚÀÇ ±¸° À§»ý µî¿¡ ¸¹Àº ÁÖÀÇ°¡ ÇÊ¿äÇÏ´Ù. ¸¹Àº ¿¬±¸¿¡¼ ÀÓÇöõÆ® ÁöÁö º¸Ã¶¹°ÀÇ ÀûÇÕµµ¿¡ µû¸¥ ÀÓÇöõÆ®ÀÇ ¿¹ÈÄ¿¡ °üÇØ º¸°íµÇ¾ú´Ù. º¸Ã¶¹°ÀÌ ¼öµ¿ ÀûÇյǾî¾ß ÀÓÇöõÆ®ÀÇ »óºÎ±¸Á¶¹× ÇϺα¸Á¶¿¡ Çطοî ÀÀ·ÂÀ» ¾ß±âÇÏÁö ¾Ê´Â´Ù°í º¸°íµÇ°í ÀÖÀ¸³ª ÇöÀçÀÇ ÀÓÇöõÆ® º¸Ã¶¹°ÀÇ Á¦ÀÛ°úÁ¤À¸·Î ÁøÁ¤ÇÑ ¼öµ¿ ÀûÇÕÀ» ¾ò´Â ¼ö ¾ø´Ù°íÀÎÁ¤µÈ´Ù. ÀÓ»ó°úÁ¤°ú ±â°ø°úÁ¤À» Æ÷ÇÔÇÏ¿© ÀÓÇöõÆ® Ä¡·áÀÇ Àü °úÁ¤¿¡¼ ¿ÀÂ÷°¡ ¹ß»ýÇϸç, ÀÌ´Â º¸Ã¶¹°À» º¯ÇüÀ» ¾ß±âÇÏ°í ÀÌ´Â ÀÓÇöõÆ® »óºÎ º¸Ã¶¹°°ú Áö´ëÁÖ »çÀÌÀÇ ¿ÀÂ÷¸¦ ¹ß»ý½ÃŲ´Ù. ÀÌ·¯ÇÑ ¿ÀÂ÷´Â º¸Ã¶¹° ÀåÂø Èĺ¸Ã¶¹°ÀÇ ÆÄÀý, ³ª»çÀÇ Çæ°Å¿ò(screw loosening), °ñ¼Ò½Ç, °ñÀ¯Âø ½ÇÆÐ¿Í °°Àº ¹®Á¦¸¦ ¾ß±âÇÑ´Ù. ÀÌ·± ¿ÀÂ÷¿¡ ÀÇÇѹ®Á¦Á¡Àº cantileverÀÇ Á¸Àç, °úµµÇÑ ±³ÇÕ·ÂÀÌ Á¸ÀçÇÒ °æ¿ì ´õ¿í Áõ°¡µÈ´Ù°í º¸°íµÇ°í ÀÖ´Ù. º» ¿¬±¸¿¡¼´Â ITI ÀÓÇöõÆ®¸¦ ÇϾǰñÀÇ °ßÄ¡ÈĹæÀÇ ¹«Ä¡¾ÇºÎ¿¡ 3°³¸¦ ½Ä¸³ÇÏ°í 4-unit ĵƿ·¹¹ö °íÁ¤¼º ±¹¼ÒÀÇÄ¡¸¦ ´Ù¾çÇÑ À§Ä¡ÀÇ 100 § gapÀ» »ý¼ºÇÑ ÈÄ Á¦ÀÛÇÏ°í gapÀ» »ý¼ºÇÏÁö ¾ÊÀº °íÁ¤¼º ±¹¼ÒÀÇÄ¡¿Í 30 lbÀÇ ÇÏÁßÇÏ¿¡¼ ±¤Åº¼º ÀÀ·ÂºÐ¼®À» ½ÃÇàÇÏ¿© ÀÀ·ÂºÐÆ÷ ¾ç»ó°ú»ó´ëÀûÀÎ ÀÀ·ÂÀÇ Å©±â¸¦ ºñ±³ºÐ¼®ÇÏ¿´´Ù.
A passively fitting prosthesis is an essential prerequisite to attain long-lasting success and maintenance of osseointegration. However, true "passive fit" can not be achieved with the present implant-supported prosthesis fabrication protocol. Many clinical situations are suitably treated with cantilevered implant-supported fixed restorations. The purpose of this study was to compare the stress distribution pattern and magnitude in supporting tissues around ITI implants with cantilevered, implant-supported, screw-retained fixed prosthesis according to the fitness of superstructures. Photoelastic model was made with PL-2 resin (Measurements, Raleigh, USA) and three ITI implants (©ª4.1¡¿10 mm)were placed in the mandibular posterior edentulous area distal to the canine. Anterior and posterior extended 4-unit cantilevered FPDs were made with different misfit in the superstructures. 4 types of prosthesis were made by placing a 100 § gap between the abutment and the crown on the second premolar and/or the first molar. Photoelastic stress analysis were carried out to measure the fringe order around the implant supporting structure under simulated loading conditions (30 lb).
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±¤Åº¼ºÀÀ·ÂºÐ¼®; ³ª»çÀ¯ÁöÇü °íÁ¤¼ºº¸Ã¶¹°; ĵƿ·¹¹ö
Cantilever; Photoelastic analysis; Screw retained fixted prosthesis
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