Restorative Dentistry and Endodontics

The Korean Academy of Conservative Dentistry (대한치과보존학회)
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Theory of X-ray microcomputed tomography in dental research: application for the caries research

치과 분야 연구에서 미세전산화 단층촬영술의 이론: 치아우식증에 대한 적용

  • Park, Young-Seok (Department of Oral Anatomy, Seoul National University School of Dentistry and Dental Research Institute) ;
  • Bae, Kwang-Hak (Department of Preventive and Public Health Dentistry, Seoul National University School of Dentistry and Dental Research Institute) ;
  • Chang, Ju-Hea (Clinic for Persons with Disabilities, Seoul National University Dental Hospital) ;
  • Shon, Won-Jun (Department of Conservative Dentistry, Seoul National University School of Dentistry and Dental Research Institute)
  • 박영석 (서울대학교 치의학대학원 구강해부학교실 및 치학연구소) ;
  • 배광학 (서울대학교 치의학대학원 예방치학교실 및 치학연구소) ;
  • 장주혜 (서울대학교 치과병원 장애인클리닉) ;
  • 손원준 (서울대학교 치의학대학원 치과보존학교실 및 치학연구소)
  • Received : 2011.01.19
  • Accepted : 2011.03.01
  • Published : 2011.03.31
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Abstract

Caries remains prevalent throughout modern society and is the main disease in the field of dentistry. Although studies of this disease have used diverse methodology, recently, X-ray microtomography has gained popularity as a non-destructive, 3-dimensional (3D) analytical technique, and has several advantages over the conventional methods. According to X-ray source, it is classified as monochromatic or polychromatic with the latter being more widely used due to the high cost of the monochromatic source despite some advantages. The determination of mineral density profiles based on changes in X-ray attenuation is the principle of this method and calibration and image processing procedures are needed for the better image and reproducible measurements. Using this tool, 3D reconstruction is also possible and it enables to visualize the internal structures of dental caries. With the advances in the computer technology, more diverse applications are being studied, such automated caries assessment algorithms.

치아우식증은 현대 사회에서 여전히 유병률이 높으며, 치과 분야의 주요 상병으로 자리잡고 있다. 치아우식증에 대한 연구에 매우 다양한 방법들이 동원되고 있으나, 최근 미세전산화 단층촬영은 비파괴적인 3차원 분석 기술로서 인기를 얻어 왔으며, 기존의 방법들에 비해 다양한 장점들을 가지고 있다. 미세전산화 단층촬영술은 X선원의 종류에 따라, 모노크로매틱 혹은 폴리크로매틱으로 나뉘어지고, 전자의 경우 몇몇 장점에도 불구하고, 고가의 장비를 요구하므로 후자가 훨씬 널리 사용된다. 투과방사선량의 감소에 따라 결정되는 미네랄 밀도의 차이가 기본 원리이며, 보다 좋은 이미지와 재현 가능한 측정을 위해서는 장비의 교정과 이미지 보정 작업등이 요구된다. 또한, 미세전산화 단층촬영술을 이용하면, 치아우식 병소의 3차원적인 재건이 가능하며, 병소의 내부 구조를 가시화할 수 있다. 최근 컴퓨터 기술의 발전과 더불어 다양한 응용이 시도되고 있는데, 자동화된 충치의 정량적 분석 알고리즘 등이 그 예에 해당된다.

Keywords

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