Klocke Arndt, Shi Jianmin, Kahl-Nieke Bärbel, Bismayer Ulrich
Department of Orthodontics, College of Dentistry, University of Hamburg, Germany.
Angle Orthod. 2003 Aug;73(4):445-50. doi: 10.1043/0003-3219(2003)073<0445:IVIOIB>2.0.CO;2.
The aim of this in vitro investigation was to evaluate bond strength for a custom base indirect bonding technique using a hydrophilic primer on moisture-contaminated tooth surfaces. Stainless steel brackets were bonded to 100 permanent bovine incisors using a light-cured custom base composite adhesive, a chemically cured sealant, and the hydrophilic primer Transbond MIP (3M-Unitek, Monrovia, Calif). Five groups (A-E) of 20 teeth each were formed according to the time of contamination (before or after application of the primer) and the type of contaminant (distilled water or saliva): A, control group with no contamination; B, contamination with saliva before application of the primer; C, contamination with water before application of the primer; D, contamination with saliva before and after application of the primer; and E, contamination with water before and after application of the primer. Mean bond strength for the group without contamination (A) was 15.07 +/- 4.14 MPa and was not significantly different from bond strengths for groups B (14.91 +/- 3.99 MPa) and C (16.12 +/- 3.67 MPa), in which contamination occurred before application of the hydrophilic primer. Average bond strength in group D was 11.92 +/- 4.76 MPa. The lowest mean bond strength was measured for group E (9.85 +/- 3.77 MPa) and was significantly lower than for groups A, B, and C. Contamination after primer application resulted in an increased risk of bond failure at clinically relevant levels of stress.
本体外研究的目的是评估在受水分污染的牙齿表面使用亲水性底漆的定制基底间接粘结技术的粘结强度。使用光固化定制基底复合粘结剂、化学固化密封剂和亲水性底漆Transbond MIP（3M- Unitek，蒙罗维亚，加利福尼亚州）将不锈钢托槽粘结到100颗恒河牛切牙上。根据污染时间（底漆应用之前或之后）和污染物类型（蒸馏水或唾液）将20颗牙齿分为五组（A - E）：A组为未受污染的对照组；B组为在应用底漆之前受唾液污染；C组为在应用底漆之前受水污染；D组为在应用底漆之前和之后均受唾液污染；E组为在应用底漆之前和之后均受水污染。未受污染组（A组）的平均粘结强度为15.07±4.14MPa，与在应用亲水性底漆之前发生污染的B组（14.91±3.99MPa）和C组（16.12±3.67MPa）的粘结强度无显著差异。D组的平均粘结强度为11.92±4.76MPa。E组测得的平均粘结强度最低（9.85±3.77MPa），且显著低于A、B和C组。在临床相关应力水平下，底漆应用后受到污染会增加粘结失败的风险。
