Universal adhesive를 이용한 실리카 함유 CAD/CAM 블록과 컴포짓트 레진의 접착 = Bonding silica-containing CAD/CAM dental blocks to composite resin with universal adhesives

국문 초록 (Abstract)

CAD/CAM용 실리케이트계 블록에 대한 접착강도는 실리케이트계 블록의 구성 성분과 미세구조, 표면처리 및 적용한 접착제의 특성 등에 영향을 받을 수 있다. 본 연구에서는 다양한 조성의 실리케이트계 블록을 샌드블라스팅 또는 불산(HF)으로 처리한후 universal adhesive로 접착한 컴포짓트 레진의 전단접착강도를 측정하였으며, 추가로 실란 프라이머 적용에 따른 접착강도변화를 평가하고자 하였다. 실리카를 함유한 다양한 유형의 블록 제품 6종을 선택하였고, 임상에서 사용하는 universal adhesive 제품 5종을 선정하여 접착강도를 비교하였다. 실리케이트계 블록 표면을 매끈하게 연마한 후 일부는 HF로 산-부식처리하고, 일부는 알루미나로 샌드블라스팅 처리한 후 표면거칠기, 젖음성 및 미세구조 등을 CLSM, contact angle analyzer 및 FE-SEM으로분석한 다음 컴포짓트 레진(지름 2 mm)을 universal adhesive로 접착시켜 37 ℃ 수조에서 24시간 보관한 다음 만능시험기를 이용하여 전단접착강도를 측정하였다. 측정값들은 Tukey-multiple comparison test(α=0.05)로 통계 분석하여 다음의 결과를 얻었다. 하이브리드 컴포짓트 세라믹의 경우에는 샌드블라스팅 또는 HF-처리에 따른 접착력의 유의한 차이가 없었고, universal adhesive로 접착하는 경우 추가로 실란을 적용하는 것이 필요하지 않을 수 있다, 반면 백류석 강화형 및 리듐 다이실리케이트 글라스-세라믹 경우에는 샌드블라스팅-처리 보다 HF-처리가 접착에 유리할 수 있으며, universal adhesive를 적용하더라도 실란을추가로 적용하는 것이 필요한 것으로 보였다.

다국어 초록 (Multilingual Abstract)

The bond strength to the silicate-based CAD/CAM blocks may be affected by the composition and microstructure of the silicate- based blocks, surface treatment, and the properties of the applied adhesive. In this study, the shear bond strength to the silicate blocks with various universal adhesives after sandblasting or HF-treatment was measured, and the effects of the additional silane application after surface treatments are evaluated. Six silica-containing blocks and five universal adhesives currently used in dental clinics were selected. After polishing the silicate block surface, the specimens were divided into two groups. The first groups were HF-treated and the second groups were sandblasted with alumina, and the surface roughness, contact angle, and microstructure were analyzed by CLSM (Confocal Laser Scanning Microscope), contact angle analyzer, and FE-SEM (Field Emission Scanning Electron Microscope).
Composite resin (2 mm diameter) was bonded with universal adhesive to silicate blocks and stored in a 37 ℃ water bath for 24 hours, and the shear bond strength was measured using a universal testing machine. The measured values were statistically analyzed using the Tukey-multiple comparison test (α=0.05). For hybrid composite ceramics, there was no significant difference in bond strength between sandblasting or HF-treatment, and additional silane application may not be necessary when bonding with a universal adhesive, whereas for leucite-reinforced and lithium disilicate glass-ceramics, HF-treatment may be more favorable for adhesion than sandblasting, and additional silane application appears to be necessary even when applying a universal adhesive.

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