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Comparison of the Strain on the Alveolar Ridge According to the Occlusal Scheme of Complete Dentures

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ÃÖ¿øÁØ ( Choi Won-Jun ) - ¼­¿ï´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø Ä¡°úº¸Ã¶Çб³½Ç
ÀÓ¿µÁØ ( Lim Young-Jun ) - ¼­¿ï´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø Ä¡°úº¸Ã¶Çб³½Ç
±èâȸ ( Kim Chang-Whe ) - ¼­¿ï´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø Ä¡°úº¸Ã¶Çб³½Ç
±è¸íÁÖ ( Kim Myung-Joo ) - ¼­¿ï´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø Ä¡°úº¸Ã¶Çб³½Ç

Abstract

ÃÑÀÇÄ¡°¡ ÀÜÁ¸Ä¡Á¶Á¦¿¡ °¡ÇÏ´Â ÀÀ·ÂÀº ÁöÁö°ñÀÇ Èí¼ö¸¦ ¾ß±âÇÒ ¼ö ÀÖÀ¸¸ç, ÀÌ´Â ÇϾǰñ¿¡¼­ ´õ ÈçÈ÷ ¹ß»ýÇÑ´Ù. ÀÌ·¯ÇÑ ÀÀ·ÂÀº Ãø¹æ·Â°ú °ü·ÃÀÌ ÀÖ°í, ÀÌ´Â ÃÑÀÇÄ¡ÀÇ ±³Çշ¿¡ µû¶ó Â÷À̸¦ º¸ÀÌ°Ô µÈ´Ù. ±×·¯¹Ç·Î º» ¿¬±¸ÀÇ ¸ñÀûÀº ÃÑÀÇÄ¡ÀÇ ±³ÇÕ¾ç½Ä(¾çÃø¼º ±ÕÇü±³ÇÕ-33µµ ÇغÎÇÐÀû Ä¡¾Æ, C±º ; ¹«±³µÎ±³ÇÕ-0µµ ºñÇغÎÇÐÀû Ä¡¾Æ, M±º ; ¼³Ãø±³ µÎ±³ÇÕ,-»ó¾ÇÀº 33µµ ÇغÎÇÐÀû Ä¡¾Æ¿Í ÇϾÇÀº 0µµ ºñÇغÎÇÐÀû Ä¡¾Æ, L±º)¿¡ µû¸¥ ÇϾÇÀÜÁ¸Ä¡Á¶Á¦¿¡ ¹ÌÄ¡´Â ÀÀ·ÂÀÇ Å©±â¸¦ Áß½ÉÀ§, Ãø¹æÀ§, Àü¹æÀ§ »óÅ¿¡¼­ ºñ±³ÇÏ´Â °ÍÀÌ´Ù. ±â¼º ¾ÆÅ©¸±¸¯ ¹«Ä¡¾Ç ¸ðµ¨À» ÀÌ¿ëÇÏ¿© ¾çÃø¼º ±ÕÇü±³ÇÕ, ¹«±³µÎ±³ÇÕ, ¼³Ãø±³µÎ±³ÇÕ ¾ç½ÄÀ» °®´Â ÃÑÀÇÄ¡¸¦ Á¦ÀÛÇÏ¿© À̸¦ T-Scan¥±(Tekscan, Boston, U.S.A)¸¦ ÀÌ¿ëÇØ ±â·ÏÇß´Ù. ÇÏ¾Ç ¹«Ä¡¾Ç ¾ÆÅ©¸± ¸ðÇüÀ» 1.5 mm ÀÏÁ¤ÇÏ°Ô »èÁ¦ÇÑ µÚ ½Ç¸®ÄÜÀ¸·Î Á¡¸·À» ÀçÇöÇÏ¿© Á¦1¼Ò±¸Ä¡¿Í Á¦1´ë±¸Ä¡ºÎÀ§¿¡ °¢°¢ 4x6ÀÇ linear strain gauge¸¦ ºÎÂøÇß´Ù. ±³Çձ⿡ ¸ðÇüÀ» ºÎÂøÇÑ »óÅ¿¡¼­ Universal TestingMachine(instron¢ç 5567, Bluehill 2.0 software ,U.S.A.)À¸·Î 50 N°ú 150 NÀÇ ÈûÀ» Áß½ÉÀ§, Ãø¹æÀ§, Àü¹æÀ§ »óÅ¿¡¼­ ÀÏÁ¤
ÇÏ°Ô °¡ÇÏ¿© ±³ÇÕ¾ç½Ä¿¡ µû¸¥ ÀÀ·Â°ªÀ» ÃøÁ¤Çß´Ù. Áß½ÉÀ§¿Í Àü¹æÀ§ »óÅ¿¡¼­´Â Àü¹æ°ú ÈĹæÀÇ ÀÀ·Â°ªÀ» ±³ÇÕ¾ç½Ä
¿¡ µû¶ó ºñ±³ÇÏ°í, Ãø¹æÀ§¿¡¼­´Â ÀÛ¾÷Ãø°ú ºñÀÛ¾÷Ãø¿¡¼­ÀÇ ÀÀ·Â°ªÀ» ºñ±³ÇÏ¿´´Ù. ÀÌ»ó°ú °°Àº ½ÇÇèÀ¸·Î ¾çÃø¼º ±ÕÇü±³ÇÕ¿¡¼­ÀÇ ÀÀ·Â°ªÀÌ ºñÀÛ¾÷ÃøÀ» Á¦¿ÜÇÏ°í´Â ¸ðµç À§Ä¡¿¡ ¼­ ¼³Ãø±³µÎ±³ÇÕ°ú ¹«±³µÎ±³ÇÕº¸´Ù ´õ ÄÇÀ¸¸ç, ºñÀÛ¾÷Ãø°úÀÇ Â÷ÀÌ°ª°ú ºñÀÛ¾÷Ãø¿¡¼­ÀÇ ÀÀ·Â º¯È­À²µµ °¡Àå ÄÇ´Ù. ±×·¯³ª, Ãø¹æ¿îµ¿½Ã ºñÀÛ¾÷ÃøÀÇ ÀÀ·ÂÀº ¾çÃø¼º ±ÕÇü±³ÇÕ¿¡¼­ °¡Àå ÀÛÀº °ÍÀ¸·Î ³ªÅ¸³µ´Ù.

The purpose of this study was to compare the strain on the alveolar ridge in the centric, eccentric and protrusive position according to the occlusal scheme (bilateral balanced occlusion with 33 degree anatomical teeth, group B; monoplane occlusion with non-anatomical teeth, group M; lingualized occlusion with 33 degree anatomical teeth and non-anatomical teeth, group L; of complete dentures. Experimental dentures were set bilateral balanced occlusion, lingualized occlusion and monoplane occlusion. They are analysed through T-Scan II(Tekscan, Boston, U.S.A) and 1.5mm thick layer was removed from the denture-supporting surface of resin model and then replaced with silicone to simulate resilient dentulous ridge mucosa. A 4x6 linear strain gauge is attached to the 1st premolar and 1st molar area. The strain values are recorded according to the occlusal scheme in the centric, eccentric and protrusive position after uniformly applying 50 N and 150 N force through a Universal Testing Machine(instron¢ç 5567, Bluehill 2.0 software ,U.S.A.) with the models mounted in the articulator. When performing centric and protrusive occlusion, the three groups of occlusal scheme were compared in the anterior region and in the posterior region. The strains of each group were also compared in the working side and in the non-working side during eccentric excursion. It was observed that the strain in the bilateral balanced occlusion showed a higher value than the lingualized occlusion and monoplane occlusion in every position except the non-working side. However, during the eccentric movement the strain value in the non-working side showed the lowest value in the ilaterally balanced occlusion. The strain change amount from the working side or centric occlusion to non-working side and also the strain variation rate within the non-working side showed the highest value in bilateral balanced occlusion.

Å°¿öµå

¾çÃø¼º ±ÕÇü±³ÇÕ;¼³Ãø±³µÎ±³ÇÕ;¹«±³µÎ±³ÇÕ;strain;T-Scan¥±
bilateral balanced occlusion;lingualized occlusion;monoplane occlusion;strain;T-Scan II

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