The korean journal of orthodontics (대한치과교정학회지)

The Korean Association Of Orthodontists (대한치과교정학회)
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Effects of Indomethacin on the physiologic root resorption of deciduous teeth in dogs

인도메타신이 개의 유치 치근 흡수에 미치는 영향

  • Shin, Kang-Seob (Department of Orthodontics, College of Dentistry, Kyunghee University) ;
  • Kang, Yoon-Goo (Department of Orthodontics, College of Dentistry, Kyunghee University) ;
  • Lee, Ki-Soo (Department of Orthodontics, College of Dentistry, Kyunghee University)
  • 신강섭 (경희대학교 치과대학 교정학교실) ;
  • 강윤구 (경희대학교 치과대학 교정학교실) ;
  • 이기수 (경희대학교 치과대학 교정학교실)
  • Published : 2005.04.01
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Abstract

This study was aimed to investigate the effects of indomethancin on physiologic root resorption and to examine the dental pulp and tissue changes around the resorbing teeth 13-14 week old six mongrel dogs were divided into 3 groups, two experimental groups administered indomethacin 2mg/kg/day and 8mg/kg/day orally two times a day for 14 days respectively. and control group administered a placebo The deciduous incisors showing root resorption were selected. fixed for 24 hrs in $10\%$ formalin solution. demineralized in $10\%$ EDTA solution. Invested in paraffin and sectioned in $5{\mu}m$ thick sections. The preparations were stained with H&E staining and Masson's trichrome staining and examined under the light microscope Observation revealed that deciduous root resorbing tissue resembles inflammatory tissue and accompanies bore remodelling. The dental pulp was formal except the area near root resorption. well organized columnar odontoblasts layer under the predentin, anud the odontoblasts near root resorption were cuboidal or flat cells in the disrupted layer under the predentin. Indomethacin administered group showed a partial decrease in the number of odontoclasts and nucleus But there was no sign of pulp change by indomethacin. These results suggest that indomethacin inhibits recruitment of odontoclasts partially and that of osteoclasts more. and so when it is administered for long periods deciduous root resorption can be delayed and eruption of the successor can be delayed for a short period.

이 연구는 흡수중인 유치를 대상으로 인도메타신이 치근흡수에 미치는 영향을 조사하고. 치근흡수에 관련된 주위 조직의 변화를 관찰하기 위하여 시행되었다. 인도메타신은 파골세포의 수를 감소시키고 골흡수를 감소시키며, 골형성도 감소시키는 것으로 보고되어 왔으나 형태와 기능이 유사하다는 파치세포에 미치는 영향에 관한 연구는 희소하다. 생후 12-13주된 잡견 6마리를 통상적 복용량인 인도메타신 2 mg/kg/day를 14일간 투여한 군과 과량의 8mg/kg/day를 14외간 투여한 군과 대조군으로 구분하였으며 흡수중인 하악 절치를 연구대상으로 하였다 연구대상 치아는 $5{\mu}m$ 두께의 절편을 만들고, H&E 중염색, Masson의 trichrome 염색을 시행하고 광학현미경으로 검경하였으며, 파치세포의 수와 핵의 수를 비교하였다. 관찰 결과 유치 치근 흡수 조직은 골개조 소견과 함께 염증소견과 유사한 소견을 보였다. 흡수중인 유치의 치수는 치근흡수부위에 가까운 조상아세포층은 변성의 소견을 보이나 멀리 떨어진 치수는 종상인 소견을 보였으며 인도메타신이 투여된 실험군에서는 파치세포의 수적 감소와 핵의 수적 감소를 미약하게 나타냈다 그러나 인도메타신이 흡수중인 치아의 치수에 미치는 영향은 관찰되지 않았다. 이상의 결과에 의하면 인도메타신은 파치세포의 수적 감소를 미약하게 일으키며 장기간의 인도메타신 투여는 유치 치근흡수의 지연을 초래할 가능성이 있음을 시사한다.

Keywords

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