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치아회분과 석고혼합제재 매식후 Digital Subtraction Radiography에 의한 골량 변화의 평가
Evaluation of Bone Change by Digital Subtraction Radiography after Implantation of Tooth Ash-plaster Mixture

치과방사선 1999년 29권 2호 p.423 ~ 434

소속 상세정보

김재덕/Jae Duk Kim 김광원/조영곤/김동기/최의환/Kwang Won Kim/Young Gon Cho/Dong Kie Kim/Eui Hwan Choi

KMID : 0378219990290020423

Abstract

결론
본 연구에서는 경조직 결손부에 대한 치아회분매식술을 시행한 후 미세골량변화의 평가
가능한 시기를 결정하고 골파괴 또는 회복의 골량 변화 및 전체 결손부의 회복되는 양상을
주기적으로 평가하여 집적(集積)하기 위해 공제술에 의해 변화부분만을 화상으로 얻어 색상
강화하는 방법과 연속시간영상의 surface plot으로 모식화할 수 있는 임상적 평가방법을 검
증하여 다음과 같은 결론을 얻었다.
1. 구리당량변환식은 결정계수가 평균 0.9988로서 신뢰도가 높았으며 구리당량치의 변동은
8%에서 10%의 범위에 들어 재현성이 높았다.
2. 변환식에 의해 연산된 매식혼합물 및 골조직의 구리당량측정치의 변동도 6%에서 9%
의 범위내에 있어 우수한 재현성을 보였다.
3. 양방향공제술후 색상강화평가에 의한 매주 골변화평가는 구리당량치평가와 일치하였다.
4. 연속화상의 surface plot은 골변화를 입체적으로 가시화하였다.
#초록#
Purpose : To assess the methods for the clinical evaluation of the longitudinal bone
changes after implantation of tooth ash-plaster mixture into the defect area of human
jaws.
Materials and methods : Tooth ash-plaster mixtures were implanted into the defects
of 8 human jaws. 48 intraoral radiograms taken with copper step wedge as reference at
soon. 1st, 2nd, 4th, and 6th week after implantation of mixture were used. X-ray taking
was standardized by using Rinn XCP device customized directly to the individual
dentition with resin bite block. The images inputted by Quick scanner were digitized
and analyzed by NIH image program. Cu-equivalent values were measured at the
implanted sites from the periodic digital images. Analysis was performed by the
bidirectional subtraction with color enhancement and the surface plot of resliced
contiguous image. The obtained results by the two methods were compared with
Cu-equivalent value changes.
Results : The average determination coefficient of Cu-equivalent equations was 0.9988
and the coefficient of variation of measured Cu values ranged from 0.08∼0.10. The
coefficient of variation of Cu-equivalent values measured at the areas of the mixture
and the bone by the conversion equation ranged from 0.06∼0.09. The analyzed results
by the bidirectional subtraction with color enhancement were coincident with the
changes of Cu-equivalent values. The surface plot of the resliced contiguous image
showed the three dimensional view of the longitudinal bone changes on one image and
also coincident with Cu-equivalent value changes after implantation.
Conclusion : The bidirectional subtraction with color enhancement and the surface plot
of the resliced contiguous image was very effective and reasonable to analyze clinically
and qualitatively the longitudinal bone change. These methods are expected to be
applicable to the non-destructive test in other fields.