알루미나 샌드블라스팅과 불화수소산 에칭이 라미네이트 베니어용 나노-하이브리드 세라믹의 표면 거칠기와 광학적 특성에 미치는 영향
Effect of alumina sandblasting and hydrofluoric acid etching on the surface roughness and optical properties of a nano-hybrid ceramic for laminate veneers
Purpose: To evaluate how alumina sandblasting (AL), with and without hydrofluoric (HF) acid etching, affects surface roughness and optical properties (ΔE00 and TP) used for laminate veneers. Methods: Thirty A2-shade nano-hybrid ceramic specimens were milled and finished to a thickness of 0.5±0.01 mm and allocated to three groups (n=10): AL, AL+5% HF (AL5), and AL+9.5% HF (AL9.5). Surface roughness (Ra) and optical properties (ΔE00, TP) were evaluated. Data normality and homoscedasticity were assessed, followed by Welch’s analysis of variance (ANOVA) with Dunnett T3 (Ra) and ANOVA with Tukey HSD (ΔE00, TP) at α=0.05. Field-emission scanning electron microscope/energy dispersive X-ray spectroscopy characterized surface and microstructural changes. Results: Mean±SD were as follows. Ra (μm): AL 2.86±0.54, AL5 2.43±0.26, and AL9.5 2.79±0.15 (p<0.05); ΔE00: AL 2.94±0.90, AL5 7.79±0.70, and AL9.5 8.81±0.64 (p<0.001); and TP: AL 28.40±1.00, AL5 23.62±0.86, and AL9.5 22.69±0.72 (p<0.001). Post-hoc analysis revealed that Ra differed only between AL5 and AL9.5. ΔE00 differed among all groups. For TP, differences were present for AL versus AL5 and AL9.5, but not between AL5 and AL9.5. Conclusion: At a veneer thickness of 0.5 mm, the addition of HF etching to AL significantly increases color change and reduces translucency, whereas roughness differences are modest and group-dependent. Increasing HF concentrations induce micro-porosity and silica dissolution that likely drive optical shifts.
목차
Abstract INTRODUCTION MATERIALS AND METHODS 1. 실험 시편 제작 및 표면 전처리 2. 표면 거칠기 측정 및 광학적 특성 측정 3. 표면 미세구조 및 원소 분석 4. 통계분석 RESULTS 1. 거칠기 및 광학적 특성 2. 표면 미세구조 및 원소 분석 DISCUSSION CONCLUSIONS FUNDING ACKNOWLEDGEMENTS CONFLICT OF INTEREST ORCID REFERENCES
키워드
Air abrasionCeramicCIEDE2000Dental etchingOptical propertyScanning electron microscope
저자
이혁준 [ Hyuk-Joon Lee | 고려대학교 일반대학원 보건과학과 ]
박영대 [ Young-Dae Park | 대구보건대학교 치기공과 ]
김지환 [ Ji-Hwan Kim | 고려대학교 일반대학원 보건과학과 ]
Corresponding Author