Fernández Marc, Delgado Luis, Molmeneu Meritxell, García David, Rodríguez Daniel
Research Technician, Biomaterials, Biomechanics and Tissue Engineering Group, Department of Materials Science, Technical University of Catalonia, Barcelona, Spain.
Private practice, Barcelona, Spain.
J Prosthet Dent. 2014 Feb;111(2):116-23. doi: 10.1016/j.prosdent.2013.09.006. Epub 2013 Oct 28.
The microgap between implant components has been associated with complications such as screw loosening or adverse biologic responses.
The purpose of this study was to quantify the microroughness of the mating surfaces of implant components manufactured with different processes, to quantify the microgap between implant components, and to determine whether a correlation exists between microroughness and the microgap.
Nine dental implants with a standard external connection were paired with 3 milled, 3 cast, and 3 sintered compatible cobalt-chromium alloy abutments. The abutment surface was examined, and the roughness parameter Sz was measured by using a white-light interferometric microscope at ×10 to ×100 magnification. The abutment surface and the microgap of the implant-abutment connection were observed with scanning electron microscopy, and the microgap width was quantified from micrographs made of each implant-abutment pair. The mean and standard deviation of roughness and microgap were evaluated. A 1-way ANOVA (α=.05) was used to assess the influence of the manufacturing process on roughness and microgap. The Pearson correlation was used to check dependence between roughness and microgap.
The milled abutments possessed a connection geometry with defined edges and a mean roughness of 29 μm, sintered abutments showed a blurred but functional connection with a roughness of 115 μm, and cast abutments showed a connection with a loss of axial symmetry and a roughness of 98 μm. A strong correlation was found between the roughness values on the mating surfaces and the microgap width.
The milled components were smoother than the cast or sintered components. A correlation was found between surface roughness and microgap width.
种植体部件之间的微小间隙与诸如螺钉松动或不良生物学反应等并发症相关。
本研究的目的是量化采用不同工艺制造的种植体部件配合表面的微观粗糙度，量化种植体部件之间的微小间隙，并确定微观粗糙度与微小间隙之间是否存在相关性。
9个具有标准外部连接的牙种植体与3个铣削、3个铸造和3个烧结的兼容钴铬合金基台配对。检查基台表面，并使用白光干涉显微镜在10倍至100倍放大倍数下测量粗糙度参数Sz。用扫描电子显微镜观察基台表面和种植体 - 基台连接的微小间隙，并从每个种植体 - 基台对的显微照片中量化微小间隙宽度。评估粗糙度和微小间隙的平均值和标准差。采用单因素方差分析（α = 0.05）来评估制造工艺对粗糙度和微小间隙的影响。使用Pearson相关性来检查粗糙度和微小间隙之间的依赖性。
铣削基台具有边缘明确的连接几何形状，平均粗糙度为２９μm，烧结基台显示出模糊但功能性的连接，粗糙度为115μm，铸造基台显示出轴向对称性丧失的连接，粗糙度为98μm。在配合表面的粗糙度值与微小间隙宽度之间发现了强相关性。
铣削部件比铸造或烧结部件更光滑。发现表面粗糙度与微小间隙宽度之间存在相关性。
