Lee Jin, Jang Ki-Taeg, Kim Jung-Wook, Lee Sang-Hoon, Hahn Se-Hyun, Kim Chong-Chul
Department of Pediatric Dentistry, College of Dentistry, Seoul National University, Korea.
Am J Dent. 2003 Dec;16(6):404-8.
To apply a vibration technique to compare the bond strength and resin penetration depth into the dentin tubules with those gained using conventional techniques.
Eighty-eight noncarious extracted human permanent molar teeth were sectioned to remove the coronal enamel. They were embedded in a 1-inch PVC pipe with an acrylic resin. The occlusal surfaces were placed so that the tooth and the embedding medium were at the same level to form a single flat surface. The samples were subsequently polished with silicon carbide abrasive papers, and randomly assigned to four groups (n=22). In Groups 1 and 2, Single Bond was used, and in Groups 3 and 4, One-Step was used. Each adhesive system was applied according to its manufacturer's instructions. For Groups 2 and 4, vibration was applied with an ultrasonic scaler for 10 seconds, and the adhesive was light-cured for 10 seconds. The resin composite was condensed onto the prepared surface in two increments using a Teflon mold and each increment was light-cured for 40 seconds. After 24 hours soaking in tap water at room temperature, the specimens were thermocycled, and the shear bond strengths were measured using a universal testing machine. One-way ANOVA test followed by Student-Newman-Keuls test (P < 0.05) were used to analyze the results. To investigate the infiltration patterns of the adhesive materials, the surface of the specimens was examined with electron microscopy.
The shear bond strengths of the vibration groups (Groups 2, 4) were significantly higher than those of the non-vibration groups (Groups 1, 3). The shear bond strengths of Single Bond and One-Step were not significantly different. The vibration groups showed greater numbers of resin tags in the tubules and lateral branches under SEM than the non-vibration groups.
应用一种振动技术，将牙本质小管内的粘结强度和树脂渗透深度与使用传统技术所获得的结果进行比较。
选取88颗非龋性拔除的人类恒牙，将其冠部釉质去除后进行切片。用丙烯酸树脂将它们嵌入1英寸的聚氯乙烯管中。放置咬合面，使牙齿和嵌入介质处于同一水平，形成一个单一的平面。随后用碳化硅砂纸对样本进行抛光，并随机分为四组（每组n = 22）。第1组和第2组使用Single Bond，第3组和第4组使用One-Step。每种粘结系统均按照制造商的说明使用。对于第2组和第4组，使用超声洁牙器施加振动10秒，然后对粘结剂进行10秒的光固化。使用聚四氟乙烯模具分两层将树脂复合材料凝聚到制备好的表面上，每层光固化40秒。在室温下的自来水中浸泡24小时后，对标本进行热循环处理，并用万能试验机测量剪切粘结强度。结果采用单因素方差分析，随后进行Student-Newman-Keuls检验（P < 0.05）。为了研究粘结材料的渗透模式，用电子显微镜检查标本的表面。
振动组（第2组、第4组）的剪切粘结强度显著高于非振动组（第1组、第3组）。Single Bond和One-Step的剪切粘结强度无显著差异。与非振动组相比，振动组在扫描电子显微镜下显示小管和侧支中有更多的树脂突。
