열화상 기술을 이용한 치아/복합레진 수복부의 박리 평가
Evaluation of Delamination of Dental Composite Restoration using Infrared Lock-in Thermography
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초록
치과용 복합레진 수복재가 치아로부터 박리된 상태를 모사한 시편을 제작하고 위상잠금 적외선 열화상 기법을 이용하여 박리의 검출 가능성을 조사하였다. 내부 박리의 깊이와 가열 조건에 따른 검출 신호의 Amplitude와 Phase 이미지를 분석하였다. 내부 박리의 위치가 표면으로부터 0.5 mm 인 시편은 lock-in frequency = 0.05 Hz에서 건전부와 박리부의 Amplitude 차이가 가장 컸으며 1 mm와 1.5 mm 시편은 0.025 Hz와 0.01 Hz에서 Amplitude 차이로 박리부 검출이 가능하였다. Phase 변환 결과로부터 0.5 mm 시편은 0.006 Hz와 0.5 Hz 에서 뚜렷한 박리부의 이미지를 얻을 수 있었으며, 1 mm와 1.5 mm 시편은 0.006-0.1 Hz에서 박리부의 검출이 가능하였다.
Abstract
The purpose of this study was to investigate the feasibility on the detection of dental composite delamination using a lock-in thermography method. Amplitude and phase images of detected thermal signals were analyzed according to the lock-in frequencies. At a lock-in frequency of 0.05 Hz, the ligament thickness of 0.5 mm in the specimen exhibited the highest amplitude contrast between defective area and sound area. For ligament thicknesses of 1 mm and 1.5 mm, delamination detection was possible at 0.025 Hz and 0.01 Hz through the amplitude differences. At lock-in frequencies of 0.006 Hz and 0.01 Hz, ligament thickness 0.5 mm exhibited the highest phase contrast. For ligament thicknesses of 1 mm and 1.5 mm, the phase contrast exhibited possible detection of delamination at 0.006-0.1 Hz.
참고문헌 (7)
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