Kelsey W P, Triolo P T, Blankenau R J, Kelsey M N, Ortmeier C, Hauser D
Department of Operative Dentistry, Creighton University School of Dentistry, Omaha, NE 68178, USA.
Am J Dent. 1996 Jun;9(3):105-8.
To investigate the differences in shear bond strengths between indirect and direct resin composites attached to enamel and dentin.
Sixty human molar teeth stored in distilled water since extraction were used in this study. Thirty of the teeth were prepared to form a flat enamel surface ground to 600 grit and 30 of the teeth were prepared to form a flat dentin surface ground to 600 grit. Cylinders constructed from Triad indirect resin composite were bonded to 15 enamel and 15 dentin surfaces and additional cylinders constructed from TPH direct resin were bonded to the remaining 15 enamel and 15 dentin substrates. Bond strengths were determined by shearing the specimens with an Instron testing machine.
Mean shear bond strengths observed in this study were: Triad to enamel, 27.64 +/- 7.35 MPa; TPH to enamel, 27.43 +/- 3.37 MPa; Triad to dentin, 21.83 +/- 3.10 MPa; and TPH to dentin, 21.27 +/- 4.85 MPa. Two-way ANOVA demonstrated that significant differences existed between the four test groups and that this difference was primarily related to the surface to which the cylinders were attached (P = 0.000). No significant differences were discovered in shear bond strengths between restorative materials (P = 0.767) or between restorative materials bonded to a specific, common surface (P = 0.891). Turkey's post hoc test demonstrated that the shear bond strength of Triad to enamel was significantly greater than the shear bond strength of either Triad to dentin (P = 0.012) or TPH to dentin (P = 0.005). This test also pointed out that the shear bond strength of TPH to enamel was significantly greater than the shear bond strength of either TPH to dentin (P = 0.007) or Triad to dentin (P = 0.016). Finally, it was noted that the shear bond strength of Triad to enamel was essentially the same as TPH to enamel (P = 1.000) and that the bond strength of Triad to dentin was essentially the same as TPH to dentin (P = 0.990).
研究间接和直接树脂复合材料与釉质和牙本质粘结的剪切粘结强度差异。
本研究使用60颗自拔除后储存在蒸馏水中的人磨牙。其中30颗牙齿制备成打磨至600目粒度的平整釉质表面，另外30颗牙齿制备成打磨至600目粒度的平整牙本质表面。由Triad间接树脂复合材料制成的圆柱体粘结到15个釉质和15个牙本质表面，由TPH直接树脂制成的额外圆柱体粘结到其余15个釉质和15个牙本质基底上。通过Instron测试机对标本进行剪切来测定粘结强度。
本研究观察到的平均剪切粘结强度为：Triad与釉质，27.64±7.35MPa；TPH与釉质，27.43±3.37MPa；Triad与牙本质，21.83±3.10MPa；TPH与牙本质，21.27±4.85MPa。双向方差分析表明四个测试组之间存在显著差异，且这种差异主要与圆柱体所粘结的表面有关（P = 0.000）。在修复材料之间（P = 0.767）或粘结到特定、共同表面的修复材料之间（P = 0.891）未发现剪切粘结强度有显著差异。Turkey事后检验表明，Triad与釉质的剪切粘结强度显著大于Triad与牙本质（P = 0.012）或TPH与牙本质（P = 0.005）的剪切粘结强度。该检验还指出，TPH与釉质的剪切粘结强度显著大于TPH与牙本质（P = 0.007）或Triad与牙本质（P = 0.016）的剪切粘结强度。最后，注意到Triad与釉质的剪切粘结强度与TPH与釉质基本相同（P = 1.000），且Triad与牙本质的粘结强度与TPH与牙本质基本相同（P = 0.990）。
