Wolf D M, Powers J M, O'Keefe K L
Oral Biomaterials, UTHHSC, Dental Branch Houston, TX 77225.
Am J Dent. 1993 Jun;6(3):155-8.
In vitro tensile bond strengths of composite to porcelain treated by acid etching or sandblasting were measured. A 9.5% HF gel was applied for 30, 60, 150, or 300 seconds at 23 degrees C. Al2O3 particles were applied as wet-10.2, dry-33.5, dry-48.0, or dry-78.0 microns. Average roughness (Ra) was measured by profilometry before and after each treatment. Both longer etching time and sandblasting using Al2O3 with larger particle sizes produced increased surface roughness of porcelain. Etching with 9.5% hydrofluoric acid gel produced higher bond strengths than sandblasting with a series of Al2O3 particles. Etching longer than 60 seconds produced increased cohesive failures in porcelain, whereas most failures observed with sandblasted surfaces were adhesive.
测量了通过酸蚀或喷砂处理的复合材料与瓷之间的体外拉伸粘结强度。在23摄氏度下，使用9.5%的氢氟酸凝胶处理30、60、150或300秒。应用的Al2O3颗粒尺寸为湿态-10.2微米、干态-33.5微米、干态-48.0微米或干态-78.0微米。每次处理前后通过轮廓仪测量平均粗糙度（Ra）。更长的蚀刻时间以及使用更大粒径的Al2O3进行喷砂处理都会使瓷的表面粗糙度增加。用9.5%氢氟酸凝胶蚀刻产生的粘结强度高于用一系列Al2O3颗粒进行喷砂处理。蚀刻超过60秒会导致瓷中内聚破坏增加，而喷砂表面观察到的大多数破坏是粘结性的。
