Valente Mariana Lima da Costa, Shimano Antonio Carlos, Mazzo Carla Rodrigues, Lepri César Penazzo, dos Reis Andréa Cândido
Department of Dental Materials and Prosthesis, School of Dentistry of Ribeirao Preto, Sao Paulo, Brazil.
Indian J Dent Res. 2014 Jan-Feb;25(1):32-5. doi: 10.4103/0970-9290.131051.
The aim of the present study was to evaluate the possible deformations in the surface of dental implants submitted to pullout and insertion test in polyurethane synthetic bone, using scanning electron microscopy.
Four different types of implants were used: Master Screw, Master Porous, Master Conect AR and Master Conect Conical (n = 8). These implants were into the femoral head synthetic bone (Synbone) and removed through the pullout test, performed with a universal testing machine (EMIC MEM 2000). All the screws, before and after the mechanical tests, were micro structurally analyzed in a Scanning Electron Microscope (SEM - Zeiss EVO50), utilizing a magnification of 35 times. The results were subjected to ANOVA and Tukey tests (α =0.05).
Only the Master Conect Conical and Master Porous implants presented statistically significant difference to pullout and maximum deformation (P = 0.014 and P = 0.009, respectively). The SEM images did not show morphological changes of the implants when compared before and after the mechanical tests.
We concluded that Master Porous presented higher pullout resistance, suggesting a greater primary stability.
本研究的目的是使用扫描电子显微镜评估在聚氨酯合成骨中进行拔出和插入测试的牙科植入物表面可能出现的变形情况。
使用了四种不同类型的植入物：Master Screw、Master Porous、Master Conect AR和Master Conect Conical（n = 8）。将这些植入物植入股骨头合成骨（Synbone）中，并通过万能试验机（EMIC MEM 2000）进行拔出测试将其取出。在机械测试前后，所有螺钉均在扫描电子显微镜（SEM - 蔡司EVO50）下进行微观结构分析，放大倍数为35倍。结果进行方差分析和Tukey检验（α = 0.05）。
仅Master Conect Conical和Master Porous植入物在拔出和最大变形方面存在统计学显著差异（分别为P = 0.014和P = 0.009）。与机械测试前后相比，扫描电子显微镜图像未显示植入物的形态变化。
我们得出结论，Master Porous具有更高的拔出阻力，表明其具有更大的初始稳定性。
