Brännström M, Nordenvall K J
J Dent Res. 1977 Aug;56(8):917-23. doi: 10.1177/00220345770560081501.
Buccal cavities were prepared in vivo on 22 contralateral tooth pairs. The cavities and the surrounding enamel were either etched or cleaned with a surface-active solution (the control). The cavities were filled with Concise Enamel Bond and composite or left unrestored. The teeth were extracted immediately after treatment. Treated surfaces or the inner surface of the restorations were studied in the scanning electron microscope (SEM). An "in-pair" evaluation of the results of 320 photographs was done. The etched axial wall had a smooth surface with widened and patent dentinal tubule apertures. The corresponding inner resin surfaces were irregular, sporadically showing tags of varying length corresponding to the dentinal tubules and alternating with pits of varying size. Etching for 15 seconds or two minutes gave no apparent difference in appearance of enamel, dentin, and inner surface of the restoration.
在22对侧牙齿上进行了体内颊面洞制备。洞及周围釉质用表面活性溶液蚀刻或清洁（作为对照）。洞用Concise釉质粘结剂和复合树脂充填或不做修复。治疗后立即拔牙。在扫描电子显微镜（SEM）下研究处理过的表面或修复体的内表面。对320张照片的结果进行了“配对”评估。蚀刻后的轴向壁表面光滑，牙本质小管开口扩大且通畅。相应的树脂内表面不规则，偶尔可见与牙本质小管相对应的不同长度的标签，并与不同大小的凹坑交替出现。蚀刻15秒或两分钟后，釉质、牙本质和修复体内表面的外观没有明显差异。
