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A STUDY ON THE EFFECTS OF CENTRIC RELATION OCCLUSION-MAXIMUM INTERCUSPATION DISCREPANCIES TO DENTAL WEAR

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Heo, Seong-Joo/Ç㼺ÁÖ Hong, Min-Ah/Kim, Kwang-Nam/È«¹Î¾Æ/±è±¤³²

Abstract

Ä¡¾Æ°æÁ¶Á÷ÀÇ ¼Ò½ÇÀº ¹Ýµå½Ã Ä¡¾Æ¿ì½ÄÁõÀ̳ª »ç°í¿¡ ÀÇÇؼ­¸¸ ÀϾ´Â °ÍÀÌ ¾Æ´Ï¶ó ¸¶¸ð¿¡ ÀÇÇؼ­µµ ÀϾ´Ù. ¸¶¸ð¿¡ ¿µÇâÀ» ¹ÌÄ¡´Â ÀÎÀÚµéÀº ½Ã°£/³ªÀÌ, ¼ºº°, ÀÌ°¥ÀÌ¿Í °°Àº °ú±â´É, ÀúÀÛ·Â, À§Àå°üÀå¾Ö, À½½Ä¹°, ȯ°æÀûÀÎ ¿µÇâ, Ÿ¾×ÀÇ »óÅ ±×¸®°í ±³ÇÕÀûÀÎ Á¶°ÇµéÀÌ ÀÖ´Ù. ÇÑÆí Áß½ÉÀ§¿Í ÃÖ´ë±³µÎ°¨ÇÕÀ§ ºÒÀÏÄ¡°¡ ¾Ç±¸°­°è¿¡ ¹ÌÄ¡´Â ¿µÇâ¿¡ °üÇؼ­´Â ¾ÆÁ÷µµ ³í¶õÀÌ ºÐºÐÇÏ´Ù. º» ¿¬±¸ÀÇ ¸ñÀûÀº Áß½ÉÀ§¿Í ÃÖ´ë±³µÎ°¨ÇÕÀ§ÀÇ ºÒÀÏÄ¡°¡ Ä¡¾Æ¸¶¸ð¿¡ ¹ÌÄ¡´Â ¿µÇâ°ú Áß½ÉÀ§¿¡¼­ Á¦ÀÏ ¸ÕÀú ´ã´Â Ä¡¾Æ¿Í ³ª¸ÓÁö Ä¡¾ÆÀÇ ¸¶¸ð¿¡ À־ Â÷ÀÌ¿¡ ´ëÇؼ­ ¾Ë¾Æ º¸´Â °ÍÀÌ´Ù.
º» ¿¬±¸´Â µÎ°³ÇϾǰüÀý°ú ÀúÀÛ½À°ü¿¡ ÀÌ»óÀÌ ¾øÀ¸¸ç, ½ÄÀ̽À°ü¿¡ ¹®Á¦°¡ ¾øÀ¸¸ç Ä¡¾Æ¿ì½ÄÁõ°ú Ä¡ÁÖÁúȯ, ¼öº¹¹°, ±³Á¤ ¶Ç´Â ±³ÇÕÄ¡·áÀÇ °æÇèÀÌ ¾ø´Â 21¼¼¿¡¼­ 25¼¼ »çÀÌÀÇ ¼­¿ï´ëÇб³ Ä¡°ú´ëÇлýÀ» ´ë»óÀ¸·Î ÇÏ¿´´Ù. ±³Çձ⸦ ÀÌ¿ëÇÏ¿© Áß½ÉÀ§ ±³ÇÕ-ÃÖ´ë±³µÎ±³µÎ°¨ÇÕÀ§ ºÒÀÏÄ¡¸¦ Á¶»çÇÏ¿©, Áß½ÉÀ§ ±³ÇÕ-ÃÖ´ë±³µÎ°¨ÇÕÀ§°¡ ºÒÀÏÄ¡°¡ ÀÛÀº ±º°ú Å« ±ºÀ¸·Î ³ª´©¾ú´Ù. °¢ ±ºÀº °¢°¢ 10¸íÀÇ ÇÇ°ËÀÚµé·Î ±¸¼ºµÇ¾ú´Ù. °¢ ÇÇ°ËÀÚÀÇ Àλóäµæ ÈÄ CR mountingÀ» ½ÃÇàÇÏ°í Áß½ÉÀ§±³ÇÕ-ÃÖ´ë°¨ÇÕÀ§ ºÒÀÏÄ¡¸¦ ÃøÁ¤ÇÑ ´ÙÀ½ ÀÓ»ó°Ë»ç·Î ordinal scaleÀ» ÃøÁ¤ÇÏ°í ¸ðÇüÀ» ÅëÇØ arbitrary scaleÀ» ÃøÁ¤ÇÏ¿´´Ù. Æò±ÕÄ¡¾Æ¸¶¸ðµµ ±×¸®°í Áß½ÉÀ§¿¡¼­ ¸ÕÀú ´ê´Â Ä¡¾Æ¿Í ³ª¸ÓÁö Ä¡¾Æ, ³ª¸ÓÁö ±¸Ä¡ÀÇ ¸¶¸ðµµ¸¦ °¢°¢ Á¶»çÇÏ¿© Åë°èó¸®ÇÏ¿´´Ù.
1. Æò±ÕÄ¡¾Æ¸¶¸ðµµ´Â ordinal scale·Î ÃøÁ¤ÇÏ¿´À» ¸Å Áß½ÉÀ§ ±³ÇÕ-ÃÖ´ë±³µÎ°¨ÇÕÀ§ ºíÀÏÄ¡°¡ ÀÛÀº ±º°ú Å« ±º »çÀÌ¿¡ Åë°èÀûÀ¸·Î À¯ÀÇÇÒ¸¸ÇÑ Â÷ÀÌ°¡ ¾ø¾ú´Ù(p>0.05).
2. Æò±ÕÄ¡¾Æ¸¶¸ðµµ´Â arbitary scale·Î ÃøÁ¤ÇÏ¿´À» ¶§ Áß½ÉÀ§ ±³ÇÕ-ÃÖ´ë±³µÎ°¨ÇÕÀ§ ºÒÀÏÄ¡°¡ ÀÛÀº ±º°ú Å« ±º »çÀÌ¿¡ Åë°èÀûÀ¸·Î À¯ÀÇÇÒ¸¸ÇÑ Â÷ÀÌ°¡ ¾ø¾ú´Ù(p>0.05).
3. CR¿¡¼­ ¸ÕÀú ´ê´Â Ä¡¾Æ¿Í ³ª¸ÓÁö Ä¡¾Æ,³ª¸ÓÁö ±¸Ä¡ÀÇ ¸¶¸ðµµ´Â ordinal scale·Î ÃøÁ¤ÇÏ¿´À» ¶§ Åë°èÀûÀ¸·Î À¯ÀÇÇÑ Â÷ÀÌ°¡ ¾ø¾ú´Ù(p>0.05).
4. CR¿¡¼­ ¸ÕÀú ´ê´Â Ä¡¾Æ¿Í ³ª¸ÓÁö Ä¡¾Æ,³ª¸ÓÁö ±¸Ä¡ÀÇ ¸¶¸ðµµ´Â arbitrary scale·Î ÃøÁ¤ÇÏ¿´À» ¶§ ¸ÕÀú ´ã´Â Ä¡¾Æ¿¡¼­ Åë°èÀûÀ¸·Î À¯ÀÇÇÑ ³ôÀº ¼öÁØÀÇ ¸¶¸ðµµ¸¦ º¸¿´´Ù(p<0.05).

Loss of hard tooth substance may be caused by factors other than caries and trauma, such as attrition, abrasion, erosion. There were many factors that could influence the type and rate of wear. These factors were time/age, gender, occlusal conditions, hyperfunction, bite force, gastrointestinal disturbances, nutrition, environmental factors, salivary factors, and other factors. On the other hand, a great deal of controversy exists regarding the effects of CRO-MI discrepancies.
The purposes of this study were 1) to evaluate the amounts of CRO-MI discrepancies on the dental wear 2) to evaluate the difference of dental wear between initially contacted teeth in CR and the other teeth.
260 students of Seoul National University Dental College were examined. Those persons who had bad dietary, environmental, working, and parafunctional factors were excluded. Centric relation occlusion-maximum intercuspation discrepancies were estimated on an articulator. 10 depending on the amount of discrepancies students were selected in each group. Group 1 showed less than 0.5§® horizontl and vertical discrepancies and group 2 showed more than 1.5§® horizontal and vertical discrepancies. The dental wears were evaluated with ordinal scale in mouths and with arbitrary scale on dental casts. And the wear values of initially contacted teeth in CR and the other teeth, the other posterior teeth were compared.
1. The mean dental wear values in all teeth, by ordinal scale, were not significantly different between the Group 1 and Group 2 (p>0.05).
2. The mean dental wear values in all teeth, by arbitrary scale, were not significantly different between the Group 1 and Group 2 (p>0.05).
3. The dental wear values, by ordinal scale, were not significantly different between the initially contact teeth and the other teeth, the other posterior teeth (p<0.05).
4. The dental wear values, by arbitrary scale, were significantly greater in initially contacted teeth than other teeth, and other posterior teeth (p>0.05).

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