레이저 우식치질제거의 최적 파장 선택에 관한 연구
Optimal wavelength selection for laser ablation of dental caries
노정훈, 전계록, 박태용, 김성식, 김진범, 김지영,
소속 상세정보
노정훈 ( Roh Jung-Hoon ) - 부산대학교 의과대학 의공학교실
전계록 ( Jeon Gye-Rok ) - 부산대학교 의과대학 의공학교실
박태용 ( Park Tae-Yong ) - 포샤르치과병원
김성식 ( Kim Seong-Sik ) - 부산대학교 치과대학 치과교정학교실
김진범 ( Kim Jin-Bom ) - 부산대학교 치과대학 예방치과학교실
김지영 ( Kim Ji-Young ) - 경남정보대학 치위생과
KMID : 0355420090330030346
Abstract
Objective: The purpose of this study was to find out the optimal wavelength of turnable lasers for selective ablation of surface enamel caries.
Methods: The absorption spectra of the sound tooth and caries lesion were measured. A figure of merit was defined as the ratio of the two. The trend was verified by direct measurement of the onset threshold of laser power of the sound and decayed area.
Results: Optimal wavelength range for selective removal of caries from the sound tissue with turnable wavelength laser was estimated to be between 500～600 nm from the reflectance spectrum measurement of sound teeth and caries. Direct measured plasma onset power of laser beam corresponded to the same spectral range. In the sound tooth, about 20 J/cm2 irradiation power with 8 ns pulse of 532 nm laser beam was measured for plasma generation while that of caries lesion was about 12 J/cm2 as expected from the figure of merit by reflection spectrum measurement.
Conclusion: The optimal spectral range for laser ablation of dental caries is between 500 nm to 600 nm both from optical absorption and onset plasma generation power measurement. The figure of merit defined as the ratio of threshold power of laser ablation is bigger than 1.4 in this range.
키워드
선택적 레이저 제거술;우식치질;최적파장
dental caries;optimal wavelength;selective laser ablation
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