Gilpatrick R O, Owens B M, Kaplan I, Cook G
Department of General Dentistry, U.T. College of Dentistry, Memphis, USA.
J Tenn Dent Assoc. 1996 Apr;76(2):18-22.
Microleakage of Class V composite resin restorations with margins all in enamel were compared in this in-vitro study using Scotchbond MultiPurpose Adhesive (SMP) (3M Corp.), and Scotchbond II (SB II) (3M Corp). Twenty extracted human molars were randomly separated into two groups: Group One, which used the SMP system and Group Two, which used the SB II system. Circular Class V preparations were cut 1.8 mm deep and 3 mm in diameter using a #556 fissure bur. Cavosurface margins, all in enamel, were beveled. The enamel and dentin were treated following manufacturer's directions for each group, and a microfilled composite resin, Silux Plus (3M Corp), was applied in two hand-placed increments. All teeth were finished with Sof-Lex discs, stored in water for seven days, then thermocycled in a water bath for 100 cycles, alternating from 4 degrees C to 58 degrees C. The teeth were placed in a 5 percent solution of methylene blue, rinsed and then invested in resin. All teeth were sectioned vertically and horizontally and a ratio (percentage) of wall length to amount of leakage along each wall was established. The overall mean leakage of Group One was 15.27 percent and Group Two was 13.84 percent. Looking at individual walls, the mean occlusal wall leakage of Group One was 28.41 percent and Group Two was 12.45 percent. Mean gingival wall leakage of Group One was 15.96 percent and Group Two was 21.80 percent. Comparing the two groups, using a student's t test, there was no significant difference between the overall mean leakage or between the gingival wall leakage (p > 0.05); however, there was a significant difference between the occlusal wall leakage (p < 0.05), with SMP exhibiting more leakage.
在这项体外研究中，对边缘均位于牙釉质内的V类复合树脂修复体的微渗漏情况进行了比较，使用的是3M公司的Scotchbond多功能粘结剂（SMP）和Scotchbond II（SB II）。将20颗拔除的人类磨牙随机分为两组：第一组使用SMP系统，第二组使用SB II系统。使用#556裂钻制备直径3毫米、深1.8毫米的圆形V类洞型。洞缘均位于牙釉质内，进行了斜面处理。按照每组制造商的说明对牙釉质和牙本质进行处理，并用Silux Plus（3M公司）微填料复合树脂分两层手工填入。所有牙齿用Sof-Lex磨片进行修整，在水中储存7天，然后在水浴中进行100次热循环，温度在4摄氏度至58摄氏度之间交替。将牙齿置于5%的亚甲蓝溶液中，冲洗后用树脂包埋。所有牙齿进行垂直和水平切片，并确定每壁的壁长与渗漏量的比例（百分比）。第一组的总体平均渗漏率为15.27%，第二组为13.84%。观察各个壁，第一组的咬合壁平均渗漏率为28.41%，第二组为12.45%。第一组的牙龈壁平均渗漏率为15.96%，第二组为21.80%。使用学生t检验比较两组，总体平均渗漏率或牙龈壁渗漏率之间无显著差异（p>0.05）；然而，咬合壁渗漏率之间存在显著差异（p<0.05），SMP的渗漏更多。
