Elzarug Yahya A M, Galburt Roger B, Ali Ala, Finkelman Matthew, Dam Hamasat Gheddaf
Department of Oral and Maxillofacial Surgery, Implant Center, Tufts University School of Dental Medicine, Boston, MA.
J Prosthodont. 2014 Jun;23(4):313-9. doi: 10.1111/jopr.12138. Epub 2014 Feb 12.
The purpose of this study was to compare shear bond strengths between two different gingiva-colored materials bonded to titanium alloy discs and acrylic resin artificial teeth.
For the first part of this study, 30 titanium alloy disc specimens were embedded in autopolymerizing resin. These discs were then divided randomly into two groups: Heat Cure (HT(1) ) and Pink Composite (CT(1) ). The discs were sandblasted with 100 μm aluminum oxide particles. For the HT(1) group using silicone molds, a wax-up was performed. After the wax removal step, heat-cured acrylic resin was applied and processed according to the manufacturer's recommendations. For the CT(1) group using silicone molds, metal primer II and gum opaque were applied and light cured; pink composite was then applied and light cured. For the second part of the study, 30 artificial resin first molar teeth were completely embedded in autopolymerizing resin. Teeth were then divided randomly into two groups: Heat Cure (HT(2) ) and Pink Composite (CT(2) ). For the HT(2) group using silicone molds, wax-up was performed. Specimens were then transferred to be processed in the heat-cured acrylic resin according to the manufacturer's recommendations. For the CT(2) group using silicone molds, composite primer followed by pink composite were applied and light cured. Shear bond tests were performed using an Instron 3345 universal testing machine. The shear load at the point of failure was recorded in Newtons. The force was calculated in MPa by calculating the failure load divided by the surface area. Two independent-samples t-tests were performed. A significance level of p < 0.05 was used for comparison.
This study revealed that the difference in the shear bond strengths of two different gingiva-colored materials bonded to titanium discs was statistically significant (p = 0.012). The difference in the shear bond strengths of two different gingival-colored materials bonded to acrylic teeth was statistically significant (p < 0.001).
In this in vitro study, heat-cured acrylic resins exhibited higher bonding strengths when bonded to titanium discs or acrylic artificial teeth in comparison to pink composite resins.
本研究旨在比较两种不同牙龈色材料与钛合金盘及丙烯酸树脂人工牙粘结后的剪切粘结强度。
在本研究的第一部分，将30个钛合金盘标本嵌入自凝树脂中。然后将这些盘随机分为两组：热固化组（HT(1)）和粉色复合材料组（CT(1)）。用100μm氧化铝颗粒对盘进行喷砂处理。对于使用硅橡胶模具的HT(1)组，进行蜡型制作。在去除蜡步骤后，按照制造商的建议应用热固化丙烯酸树脂并进行处理。对于使用硅橡胶模具的CT(1)组，应用金属底漆II和牙龈不透明剂并光固化；然后应用粉色复合材料并光固化。在本研究的第二部分，将30颗人工树脂第一磨牙完全嵌入自凝树脂中。然后将牙齿随机分为两组：热固化组（HT(2)）和粉色复合材料组（CT(2)）。对于使用硅橡胶模具的HT(2)组，进行蜡型制作。然后将标本转移至按照制造商的建议在热固化丙烯酸树脂中进行处理。对于使用硅橡胶模具 的CT(2)组，应用复合底漆，随后应用粉色复合材料并光固化。使用Instron 3345万能试验机进行剪切粘结测试。记录破坏点处的剪切载荷，单位为牛顿。通过计算破坏载荷除以表面积来计算以兆帕为单位的力。进行两次独立样本t检验。使用p < 0.05的显著性水平进行比较。
本研究表明，两种不同牙龈色材料与钛盘粘结后的剪切粘结强度差异具有统计学意义（p = 0.012）。两种不同牙龈色材料与丙烯酸牙粘结后的剪切粘结强度差异具有统计学意义（p < 0.001）。
在本体外研究中，与粉色复合树脂相比，热固化丙烯酸树脂与钛盘或丙烯酸人工牙粘结时表现出更高的粘结强度。
