Bond strength comparison of moisture-insensitive primers
Bond strength comparison of moisture-insensitive primers
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DOI：
10.1067/mod.2002.126594
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发表时间：
2002-09-01
影响因子：
3
通讯作者：
Foley, TF
中科院分区：
文献类型：
--
作者：
Schaneveldt, S;Foley, TF
本体外粘结研究的目的是评价2种对水分不敏感的底漆，Assure（Reliance Orthodontic Products，伊塔斯卡，III）和MIP（3 M Unitek，蒙罗维亚，加利福尼亚州）与对照疏水底漆，Transbond XT（3 M Unitek）的有效性。对6组共40颗前磨牙进行酸蚀处理，并使用金属正畸托槽进行粘接，其体外实验方案如下：（1）将Transbond XT底漆和粘接剂涂敷在未污染的表面;（2）唾液污染后涂敷Asure底漆;（3）唾液污染后涂敷MIP底漆;（4）唾液污染后再涂敷Asure底漆;（5）唾液污染后再涂敷MIP底漆;以及（6）确保在唾液污染底漆之后施加粘合剂。所有粘结的试样在37 ℃下在去离子水中储存30天，并在剥离前热循环24小时。在试验机上使用剪切剥离载荷使托槽脱粘，以兆帕为单位测量粘结强度，并使用粘合剂残留指数分析粘结失效。所有组的体外剪切剥离粘合强度均可接受，Assure和MIP的粘合强度未受到唾液污染的显著影响。对照组的平均剪切剥离粘合强度（14.82 MPa）显著高于（P <0.001）污染组，MIP组5除外（14.02 MPa）。Assure底漆和粘合剂的值小于MIP底漆及其各自的粘合剂;然而，应用于唾液污染表面的亲水性Assure粘合剂树脂具有可接受的粘合强度。粘接失效分析（粘接剂残留指数）主要显示粘接失效。观察到脱粘时釉质断裂的频率增加，对照组（1）和MIP组（3和5）分别为22.5%、12.5%和15%。Assure组没有牙釉质断裂。
The objective of this in vitro bonding study was to evaluate the effectiveness of 2 moisture-insensitive primers, Assure (Reliance Orthodontic Products, Itasca, III) and MIP (3M Unitek, Monrovia, Calif) compared with a control hydrophobic primer, Transbond XT (3M Unitek). Six groups of 40 premolars were acid etched and bonded using metal orthodontic brackets with the following in vitro protocols: (1) Transbond XT primer and adhesive applied to a noncontaminated surface; (2) Assure primer applied after saliva contamination; (3) MIP primer applied after saliva contamination; (4) Assure primer reapplied after saliva contamination; (5) MIP reapplied after saliva contamination; and (6) Assure adhesive applied after saliva contamination of the primer. All bonded specimens were stored in deionized water at 37degreesC for 30 days and thermocycled for 24 hours before debonding. Brackets were debonded using a shear-peel load on a testing machine, bond strength was measured in megapascals, and bond failure was analyzed by using the adhesive remnant index. In vitro shear-peel bond strengths were acceptable for all groups, and the bond strengths for Assure and MIP were not significantly affected by saliva contamination. The mean shear-peel bond strength of the control (14.82 MPa) was significantly higher (P < .001) than the contaminated groups with the exception of MIP group 5 (14.02 MPa). The values of the Assure primer and adhesive were less than the MIP primer and its respective adhesive; however, the hydrophilic Assure adhesive resin applied to a saliva-contaminated surface had acceptable bond strength. Bond failure analysis (adhesive remnant index) mainly showed adhesive bond failures. An increased frequency of enamel fractures at debond was noted, with the control group (1) and the MIP groups (3 and 5) having 22.5%, 12.5%, and 15%, respectively. The Assure groups had no enamel fractures.