Journal of the korean academy of Pediatric Dentistry (대한소아치과학회지)

Korean Academy of Pediatric Dentistry (대한소아치과학회)
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Intraoral Scan for Virtual Skull-Dentition Hybrid Images of Young Patients

가상 골격-치열 하이브리드 이미지 생성을 위한 구강 스캐너의 활용

  • Lee, Joohee (Department of Pediatric Dentistry, Dental Clinic Center, Hallym University Sacred Heart Hospital) ;
  • Yang, ByoungEun (Graduate School of Clinical Dentistry, Hallym University) ;
  • Lee, Hyelim (Department of Pediatric Dentistry, Dental Clinic Center, Hallym University Sacred Heart Hospital)
  • 이주희 (한림대학교 의과대학 한림대학교성심병원 소아치과학교실) ;
  • 양병은 (한림대학교 임상치의학대학원) ;
  • 이혜림 (한림대학교 의과대학 한림대학교성심병원 소아치과학교실)
  • Received : 2021.07.12
  • Accepted : 2021.10.14
  • Published : 2022.02.28
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Abstract

Additional dentition images are needed because the dentitions are distorted in cone-beam computed tomography (CBCT) due to streak artifacts and non-uniformity of the x-ray beam. The purpose of this study is to evaluate the feasibility of improving the dentition image of CBCT scan with intraoral scanner instead of plaster models. Maxilla images from plaster models, two intraoral scanners, and CBCT of 20 patients aged 12 to 18 were used in this study. With one of the intraoral scanners, the full arch was scanned by three segments and combined into a complete full arch. Virtual skull-dentition hybrid images from intraoral scanners were superimposed with the images from plaster models to evaluate the coordinate value difference and distance at reference points. The results showed that the coordinate value difference and distance were smallest with segmented intraoral scan, which showed only 2 ㎛ distance. Intraoral scan may provide good dentition images for virtual skull-dentition images.

콘빔 전산화 단층촬영(CBCT)은 치열을 왜곡시켜 추가 치열 이미지가 필요하다. 치열 이미지로 주로 사용되는 석고 모형을 대신해 구강 스캐너로 CBCT의 치열 이미지를 보완할 때의 임상적 활용 가능성을 평가하였다. 만 12 - 18세의 20명에게 상악에 대한 석고 모형, 구강 스캔 이미지, CBCT이미지를 획득하였다. 비교를 위해 두 종류의 구강 스캐너를 이용하였는데, 그 중 하나의 구강 스캐너로는 전악을 3분할하여 각각을 스캔한 후 이들을 병합해 전악 이미지를 획득하는 방법을 추가로 시행하였다. 구강 스캐너를 이용해 얻은 가상 골격-치열 하이브리드 이미지를 석고 모형을 통해 얻은 이미지와 중첩하여 각 기준점에서의 좌표 값의 차이와 거리를 측정하였다. 결과적으로 구강 스캐너로 분할하여 스캔하는 방법을 시행했을 때 평균 거리 2 ㎛를 보여 가장 적게 나타났다. 구강 스캐너를 적절히 이용하면 가상 골격-치열 하이브리드 이미지를 위한 치열 이미지로 훌륭히 활용될 수 있을 것이다.

Keywords

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