Journal of the korean academy of Pediatric Dentistry (대한소아치과학회지)

Korean Academy of Pediatric Dentistry (대한소아치과학회)
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THE CHARACTERISTICS OF RESIN INFILTRATED INCIPIENT CARIOUS LESIONS

Resin infiltration을 시행한 법랑질 초기 우식 병소의 특성

  • Kim, Eun-Young (Department of Pediatric Dentistry, School of Dentistry, Pusan National University) ;
  • Kwon, Min-Seok (Department of Pediatric Dentistry, School of Dentistry, Pusan National University) ;
  • Kim, Shin (Department of Pediatric Dentistry, School of Dentistry, Pusan National University) ;
  • Jeong, Tae-Sung (Department of Pediatric Dentistry, School of Dentistry, Pusan National University)
  • 김은영 (부산대학교 치의학전문대학원 소아치과학교실) ;
  • 권민석 (부산대학교 치의학전문대학원 소아치과학교실) ;
  • 김신 (부산대학교 치의학전문대학원 소아치과학교실) ;
  • 정태성 (부산대학교 치의학전문대학원 소아치과학교실)
  • Received : 2011.08.20
  • Accepted : 2012.01.10
  • Published : 2012.02.29
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Abstract

The concept of resin infiltration which was born in an innovative philosophy to arrest the incipient caries. However, the structural changes of resin infiltrated lesions have not yet explained completely. The liquid resin might contribute not only to maximizing the penetration but to deteriorating physical stability. This study was performed to examine some physical and histological features of resin infiltrated incipient carious lesions. With the specimen of resin infiltrated lesions, microhardness by nanoindentation in depth profile, morphology of resin tags were revealed after HCl dissolution, and degree of microleakage were assessed. The percentage of microhardness of surface layer and lesion body of untreated specimen to sound enamel was 64.6% and 24.6% respectively, while that of resin-infiltrated lesions was 72.1%, showing significant difference (p<0.05). The resin tags observed under SEM had relatively homogeneous length of 433(282~501) ${\mu}m$ on the average. Among 20 specimens for microleakage assessment, 13 specimens showed no leakage while 5 and 2 showed leakage into outer and inner half of lesion respectively. It was thought the infiltrant resin penetrates deeply and homogeneously into lesion body and improves its hardness with relatively good physical stability.

본 연구는 infiltrant resin을 침투시킨 초기 우식 병소의 특성을 평가하기 위해 법랑질의 깊이에 따른 경도를 측정하고, 병소 내로의 레진 침투양상을 분석하며, 미세누출 정도를 관찰하여 다음의 결과를 얻었다. 건전 법랑질에 대한 초기 우식 법랑질의 경도 백분율은 표층(5~40 ${\mu}m$) 64.6%, 병소본체(60~350 ${\mu}m$) 24.6%였으며, infiltrant resin을 침투시킨 병소의 경도 백분율은 72.1%로 나타났다. 5~350 ${\mu}m$의 전 깊이에서, infiltrant resin을 침투시킨 병소는 비처치 우식 병소보다 경도가 유의하게 높았지만 정상 법랑질에 비해서는 경도가 유의하게 낮았다(p<0.05). FESEM 관찰 결과 탈회된 법랑질 내부로 비교적 균일하게 침투한 레진 테그가 관찰되었으며, 침투깊이는 433 ${\mu}m$(282-501)로 측정되었다. 열순환 처리 후 13개의 치아에서 미세누출이 관찰되지 않았고, 5개에서 병소 외측 절반, 2개에서 병소 내측 절반까지 미세누출이 관찰되었다.

Keywords

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