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Finite element analysis of peri-implant bone stress influenced by cervical module configuration of endosseous implant

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Á¤Àç¹Î ( Chung Jae-Min ) - °æºÏ´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø Ä¡°úº¸Ã¶Çб³½Ç
Á¶±¤Çå ( Jo Kwang-Hun ) - °æºÏ´ëÇб³ Ä¡°ú´ëÇÐ º¸Ã¶Çб³½Ç
ÀÌûÈñ ( Lee Cheong-Hee ) - °æºÏ´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø Ä¡°úº¸Ã¶Çб³½Ç
À¯¿øÀç ( Yu Won-Jae ) - °æºÏ´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø ±³Á¤Çб³½Ç
À̱Ժ¹ ( Lee Kyu-Bok ) - °æºÏ´ëÇб³ Ä¡°ú´ëÇÐ º¸Ã¶Çб³½Ç

Abstract

¿¬±¸¸ñÀû: ÀÓÇöõÆ® °æºÎÀÇ Ä¡Àº°üÅëºÎ Çü»óÀÌ ÁÖÀ§°ñ ÀÀ·ÂºÐÆ÷¿¡ ¹ÌÄ¡´Â ¿µÇâ¿¡ ´ëÇØ Á¶»çÇÏ°íÀÚ ÇÑ´Ù.

¿¬±¸Àç·á ¹× ¹æ¹ý: ³ôÀÌ 2.8 mm, »óºÎ Á÷°æ 4 mm, ÇϺΠÁ÷°æ 2.7 mm ÀÎ Á÷¼±Çü Ä¡Àº°üÅëºÎ¸¦ °¡Áö´Â ITI ÀÇ ÀÏüÇü(one piece) ÀÓÇöõÆ® (Straumann, Waldenburg, Switzerland)¸¦ Base Model·Î »ç¿ëÇÏ¿©, Ä¡Àº°üÅëºÎ ¿ÜÇü¿¡ ÇÔ¸ôºÎ¸¦ ºÎ¿©ÇÏ¿© °î¼±ÇüÀ¸·Î ¼öÁ¤ÇÑ 4°³ÀÇ Çؼ® ¸ðµ¨ (Model-1, -2, -3, -4)À» ¼³Á¤ÇÏ¿´´Ù. Base ModelÀ» Æ÷ÇÔ, ¸ðµÎ 5°³ÀÇ °æ¿ì¿¡ ´ëÇØ Ãà´ëĪ À¯ÇÑ¿ä¼Ò¸ðµ¨¸µÀ» ÅëÇØ ÀÓÇöõÆ® ÀåÃà¿¡ ÆòÇàÀÎ ¼öÁ÷ ¹æÇâ°ú ÀÓÇöõÆ® ÀåÃà¿¡ 30??°æ»çÁø ¹æÇâÀ¸·Î °¢°¢ 50 NÀÇ ÈûÀÌ ÀÛ¿ëÇÒ ¶§ ¹ß»ýµÇ´Â ÀÓÇöõÆ® ÁÖÀ§°ñÀÇ ÀÀ·ÂÀ» Çؼ®ÇÏ¿© ºñ±³ÇÏ¿´´Ù. ü°èÀûÀÎ ÀÀ·Âºñ±³¸¦ À§ÇØ ÀÓÇöõÆ® ÁÖÀ§¿¡ 19°³ÀÇ ÀýÁ¡À» ÀÀ·Â °üÂûÁ¡À¸·Î¼±Á¤ÇÏ¿´À¸¸ç, °æºÎ Ä¡¹Ð°ñ¿¡ ¼³Á¤µÈ 5°³ °üÂûÁ¡ÀÇ ÀÀ·ÂÀ¸·ÎºÎÅÍ È¸±ÍºÐ¼®¹ýÀ¸·Î ÀÓÇöõÆ®/°ñ »çÀÌ¿¡¼­ »ý±â´Â ÃÖ´ëÀÀ·Â°ªÀ» ÃßÁ¤ÇÏ¿© Á¤·®ÀûÀÎ ºñ±³¸¦ ½ÇÇàÇÏ¿´´Ù.

°á °ú: ÃÖ´ë °ñÀÀ·ÂÀº Ä¡Àº°üÅëºÎ°¡ Á÷¼±ÀÎ ±âº»¸ðµ¨¿¡¼­ °¡Àå ÄÇÀ¸¸ç, Ä¡Àº °üÅëºÎ¸¦ °î¼±À¸·Î ¼³°èÇÑ °æ¿ì ÀÀ·ÂÀÌ °¨¼ÒµÇ¾ú´Ù. Ä¡Àº ÇÔ¸ôºÎ°¡ Ŭ¼ö·Ï ÀÀ·Â °¨¼Ò Á¤µµ°¡ Ä¿Á³À¸¸ç ÇÔ¸ôºÎÀÇ ¼öÁ÷À§Ä¡°¡ ¸öüºÎ¿¡ °¡Àå °¡±î¿î Model-4¿¡¼­ ÀÀ·Â°¨¼Ò Á¤µµ°¡ ÀüüÀÇ ¾à5%·Î°¡ÀåÄÇ´Ù.

°á ·Ð: ÀÓÇöõÆ®ÀÇ °æºÎ Çü»óÀº °ñÀÀ·Â¿¡ ¿µÇâÀ» ¹ÌÄ¡¸ç, À̸¦ °î¼±ÇüÀ¸·Î ÇÔÀ¸·Î½á ¶ÇÇÑ ±× ÇÔ¸ôºÎ¸¦ ¸öüºÎ¿¡ ±ÙÁ¢ÇÏ°Ô ÇÔÀ¸·Î½á °æºÎ°ñ ÀÀ·Â°¨¼Ò¸¦ È¿°úÀûÀ¸·Î µµ¸ðÇÒ ¼ö ÀÖ´Ù.

Statement of Problem: Crestal bone loss, a common problem associated with dental implant, has been attributed to excessive bone stresses. Design of implant¡¯s transgingival (TG) part may affect the crestal bone stresses.

Purpose: To investigate if concavely designed geometry at a dental implant¡¯s TG part reduces peri-implant bone stresses.

Material and Methods: A total of five differently configured TG parts were compared. Base model was the ITI one piece implant (Straumann, Waldenburg, Switzerland) characterized by straight TG part. Other 4 experimental models, i.e. Model-1 to Model-4, were designed to have concave TG part. Finite element analyses were carried out using an axisymmetric assumption. A vertical load of 50 N or an oblique load of 50 N acting at 30¡Æ with the implant¡¯s long axis was applied. For a systematic stress comparison, a total of 19 reference points were defined on nodal points around the implant. The peak crestal bone stress acting at the intersection of implant and crestal bone was estimated using regression analysis from the stress results obtained at 5 reference points defined along the mid plane of the crestal bone.

Results: Base Model with straight configuration at the transgingival part created highest stresses on the crestal bone. Stress level was reduced when concavity was imposed. The greater the concavity and the closer the concavity to the crestal bone level, the less the crestal stresses.

Conclusion: The transgingival part of dental implant affect the crestal bone stress. And that concavely designed one may be used to reduce bone stress.

Å°¿öµå

ÀÏüÇü ÀÓÇöõÆ®;°æºÎ Çü»ó;À¯ÇÑ¿ä¼Ò¹ý;°æºÎ°ñ ÀÀ·Â
One-piece implant;Transgingival design;Finite element method;Crestal bone stress

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