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PARTIAL OF COMPLETE ARREST OF ROOT FORMATION OF MAXILLARY LATERAL INCISORS RELATED TO TRAUMATIC INJURY : A CASE REPORT

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Abstract

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Àû°Ë»ç¿Í ¹®Çå°íÂûÀ» ÅëÇÏ¿© ´ÙÀ½°ú °°Àº °á·ÐÀ» ¾ò¾ú´Ù.
1. 3¼¼ ¶§ ¿Ü»óÀ» ¹ÞÀº °æ¿ì ¿ÏÀü Ä¡±Ù ¹«Çü¼ºÁõÀ», 5¼¼ ¶§ ¿Ü»óÀ» ¹ÞÀº °æ¿ì ºÎºÐ Ä¡±ÙÇü
¼ºÁõÀ» º¸ÀÌ´Â ¹Ù À¯Ä¡ ¿­±â ¿Ü»ó¼º ¼Õ»óÀÇ ¹æÇâ°ú Á¤µµ, ¿µ±¸Ä¡¹èÀÇ ¼Õ»ó½Ã±âµîÀº ¿µ±¸Ä¡
Ä¡±Ù ¹ßÀ°Á¤µµ¿¡ ¿µÇâÀ» ³¢Ä¡´Â °ÍÀ¸·Î »ç·áµÈ´Ù.
2. Á¶Á÷ °Ë»ç½Ã Ä¡±Ù¹ßÀ°¿¡ ÇʼöÀûÀÎ Hertwig »óÇÇÃÊÀÇ ¹ßÀ°ÀÌ Á¤ÁöµÇ°Å³ª ¼Ò½ÇµÊÀÌ °üÂû
µÇ¾ú´Ù.
3. Á¤»ó Ä¡±Ù ¿Ï¼º ½Ã±â±îÁö °è¼ÓÀûÀÎ °üÂû ÈÄ, ÇØ´çÄ¡¾ÆÀÇ ºÎºÐ ¶Ç´Â ¿ÏÀü Ä¡±Ù ¹«Çü¼ºÁõ
µîÀÇ ¼Ò°ßÀ» º¸À̰ųª, ¸Åº¹ ¶Ç´Â ÀÎÁ¢ Ä¡¾ÆÀÇ ¸ÍÃâ¿¡ ¹æÇØ°¡ µÇ´Â °æ¿ì¿¡´Â ÇØ´çÄ¡¾ÆÀÇ ¹ß
°ÅÈÄ ±³Á¤ ¹× º¸Ã¶Àû Ä¡·á°¡ ÇÊ¿äÇÒ °ÍÀ¸·Î »ç·áµÈ´Ù.
#ÃÊ·Ï#
Partial or complete arrest of root formation is a rare complication caused by different
factors that affects the permanent tooth during root development. The possible factors
affecting this complication have been reported in dentin dysplasia, trauma, transmission
of the periapical infection of the primary teeth to permanent tooth germ, radiation
therapy, and congenital renal disease. One of these factors, traumatic injury to the
primary dentition may cause a deflection or displacement of the permanent tooth bud.
And the effects of trauma to Hertwig¡¯s epithelial root sheath which is essential to root
development are the result of the transmisson of the traumatic force through the
surrounding bone or through the primary tooth. And it can cause critical damage to the
normal root development.
These two cases show 2 children who complained of delayed eruption of permanent
incisors, who have had a traumatic history during primary dentition. After clinical
examination, because they have no more evidence of root formation of martially lateral
incisors. We extracted the permanent maxially lateral incisors which show partial or
complete arrest of root formation.
We concluded as follows ;
1. These two cases show that one is a complete arrest of root formation when injured
at 3 years old, the other is a partial arrest of root formation when injured at 5 years
old. So, it is considered that direction and magnitude of traumatic forces and injured
stage of permanent tooth bud will affect the root development.
2. It was noticed that there was an arrest or loss of Hertwig¡¯s epithelial root sheath
in the histologic section of the extracted maxially tat. incisors.
3. After continuous observation, if there is a sign of partial or complete arrest of the
root formation, impaction, or delay of the eruption of surrounding teeth after the normal
root formation stage, extraction is indicated, and it is considered that orthodontic or
prosthodontic treatment is needed.

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