Ma Lin, Zhou Jian-feng, Tan Jian-guo, Jing Quan, Zhao Ji-zhi, Wan Kuo
Department of Stomatology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China.
Chin Med Sci J. 2011 Sep;26(3):146-51. doi: 10.1016/s1001-9294(11)60039-4.
To investigate the effect of multiple coatings of the one-step self-etching adhesive on immediate microtensile bond strength to primary dentin.
Twelve caries-free human primary molars were randomly divided into 2 groups with 6 teeth each. In group 1, each tooth was hemisected into two halves. One half was assigned to control subgroup 1, which was bonded with a single-step self-etching adhesive according to the manufacturer's instructions; the other half was assigned to experimental subgroup 1 in which the adhesive was applied three times before light curing. In group 2, the teeth were also hemisected into two halves. One half was assigned to control subgroup 2, which was bonded with the single-step self-etching adhesive according to the manufacturer's instructions; the other half was assigned to experimental subgroup 2 in which three layers of adhesive were applied with light curing each successive layer. Microtensile bond strength was immediately tested after specimen preparation.
When the adhesive was applied three times before light curing, the bond strength of the experimental subgroup 1 (n=33, 57.49 +/-11.61 MPa) was higher than that of the control subgroup 1 (n=31, 49.71 +/-11.43 MPa, P<0.05). When using the technique of applying multiple layers of adhesive with light curing each successive layer, no difference of immediate bond strength was observed between the control subgroup 2 and the experimental subgroup 2 (P>0.05).
strength to primary dentin when using the technique of light-curing after applying three layers of adhesive.
探讨一步法自酸蚀粘接剂多次涂布对其与乳牙本质即刻微拉伸粘接强度的影响。
选取12颗无龋坏的人类乳牙，随机分为2组，每组6颗牙。在第1组中，每颗牙均对半切开为两半。一半分配至对照亚组1，按照制造商说明用单步自酸蚀粘接剂进行粘接；另一半分配至实验亚组1，在光固化前粘接剂涂布3次。在第2组中，牙齿同样对半切开为两半。一半分配至对照亚组2，按照制造商说明用单步自酸蚀粘接剂进行粘接；另一半分配至实验亚组2，依次涂布三层粘接剂并逐层光固化。标本制备后立即测试微拉伸粘接强度。
在光固化前粘接剂涂布3次时，实验亚组1（n = 33，57.49±11.61MPa）的粘接强度高于对照亚组1（n = 31，49.71±11.43MPa，P < 0.05）。当采用依次逐层光固化多层粘接剂的技术时，对照亚组2与实验亚组2之间未观察到即刻粘接强度的差异（P > 0.05）。
在涂布三层粘接剂后进行光固化技术时，对乳牙本质有较高的粘接强度。
