Cal-Neto Julio Pedra e, Carvalho Felipe, Almeida Rhita Cristina C, Miguel José Augusto M
Department of Orthodontics, State University of Rio de Janeiro, Boulevard 28 de Setembro, Rio de Janeiro, RJ-22541-100, Brazil.
Angle Orthod. 2006 May;76(3):466-9. doi: 10.1043/0003-3219(2006)076[0466:EOANSP]2.0.CO;2.
The purpose of this in vitro study was to evaluate the influence of a new self-etching primer (Adper Prompt L-pop; 3M ESPE, St Paul, Minn) on shear bond strength of orthodontic brackets. Forty extracted human premolars were obtained and randomly divided into two groups of 20 each: group 1 (control), phosphoric acid + Transbond XT primer (3M Unitek, Monróvia, Calif) and group 2, Adper Prompt L-pop. Transbond XT adhesive paste (3M Unitek) was used in both groups for bracket bonding. All products were used according to the manufacturer's instructions. Instron Universal Testing Machine was used to apply an occlusal shear force directly onto the enamel-bracket interface at a speed of 0.5 mm/min. The groups were compared using Student's t-test. Mean results and standard deviation for the groups were: group 1 = 16.23 MPa (4.77), group 2 = 13.56 MPa (4.31). No significant difference was observed in the bond strengths of the two groups evaluated (P = .069). However, the adhesive remnant index was significantly less when conditioning the enamel with Adper Prompt L-pop compared with phosphoric acid (P = .0003). The results suggest no difference in bond strength whether a conventional etching and primer or Adper Prompt L-pop is used. The amount of adhesive on the enamel after debonding was significantly less when using Adper Prompt than when using phosphoric acid. These results indicated that Adper Prompt is potentially adequate for orthodontic bonding needs.
本体外研究的目的是评估一种新型自酸蚀底漆（Adper Prompt L-pop；3M ESPE，明尼苏达州圣保罗）对正畸托槽剪切粘结强度的影响。获取40颗拔除的人类前磨牙，并随机分为两组，每组20颗：第1组（对照组），磷酸 + Transbond XT底漆（3M Unitek，加利福尼亚州蒙罗维亚），第2组，Adper Prompt L-pop。两组均使用Transbond XT粘结糊剂（3M Unitek）进行托槽粘结。所有产品均按照制造商的说明使用。使用Instron万能试验机以0.5 mm/min的速度直接在牙釉质 - 托槽界面上施加咬合剪切力。使用学生t检验对两组进行比较。两组的平均结果和标准差分别为：第1组 = 16.23 MPa（4.77），第2组 = 13.56 MPa（4.31）。在评估的两组粘结强度中未观察到显著差异（P = 0.069）。然而，与磷酸相比，用Adper Prompt L-pop处理牙釉质时，粘结剂残留指数显著更低（P = 0.0003）。结果表明，无论是使用传统酸蚀和底漆还是Adper Prompt L-pop，粘结强度均无差异。脱粘后牙釉质上的粘结剂用量在使用Adper Prompt时比使用磷酸时显著更少。这些结果表明Adper Prompt可能足以满足正畸粘结需求。
