Mennemeyer V A, Neuman P, Powers J M
Department of Restorative Dentistry and Biomaterials, University of Texas-Houston Health Science Center, Dental Branch 77030-3402, USA.
Am J Orthod Dentofacial Orthop. 1999 Feb;115(2):143-7. doi: 10.1016/s0889-5406(99)70341-0.
Orthodontic bands often fail clinically at the band-cement interface. Hybrid ionomer and resin cements and a glass ionomer control were bonded to photo-etched and standard band materials, both of which were tested in as-received and air-abraded conditions. Cements were placed in a 3 mm diameter mold at the bonding interface and bonded to 6 x 6 mm stainless steel band specimens mounted to acrylic blocks. Specimens were stored in water for 24 hours at 37 degreesC and debonded in tension on a testing machine at 0.05 cm/minutes. Bond strengths (MPa) were calculated and data were analyzed by analysis of variance. Bond strengths to as-received bands were less than 3.4 MPa for cements tested, whereas bond strengths to air-abraded bands ranged from 7.1 to 17.7 MPa, except for the glass ionomer control. Air abrasion of band materials provides highly increased bond strength of hybrid ionomer and resin cements.
正畸带环在临床中常常在带环与粘固剂的界面处失效。将混合型离子聚合物和树脂粘固剂以及一种玻璃离子粘固剂作为对照，分别粘结到经光蚀刻处理的带环材料和标准带环材料上，这两种带环材料均在收到时的状态以及经空气磨蚀处理的状态下进行测试。将粘固剂置于粘结界面处直径为3毫米的模具中，并粘结到安装在丙烯酸树脂块上的6×6毫米不锈钢带环样本上。样本在37摄氏度的水中储存24小时，然后在测试机上以0.05厘米/分钟的速度进行拉伸脱粘。计算粘结强度（兆帕），并通过方差分析对数据进行分析。对于所测试的粘固剂，粘结到收到时状态带环的强度小于3.4兆帕，而粘结到经空气磨蚀处理带环的强度范围为7.1至17.7兆帕，但玻璃离子粘固剂对照除外。带环材料的空气磨蚀可显著提高混合型离子聚合物和树脂粘固剂的粘结强度。
