PDF(Pubmed)
Abstract：
Accurate fit of the abutment to the implant is required for the uniform load distribution throughout the assembly. The study aims to compare the marginal misfit of titanium stock abutments with the cobalt-chromium (CoCr) customized abutments fabricated with the different manufacturing processes in internal hex implant-abutment connection using an appropriate scanning technique.
In vitro comparative study.
A total of 40 abutments were included in the study. Ten titanium stock abutments were used as control (Group CN) and 30 CoCr abutments were fabricated and taken as the test group. Stock abutments were scanned and from obtained images test group abutments were fabricated as follows: Ten cast abutments (Group CA), 10 sintered abutments (Group SA), and 10 milled abutments (Group MA). Endosseous implanst having internal hex connections were matched with 10 stock abutments and 30 customized CoCr abutments. Implants were mounted in a clear epoxy resin block and the abutments were then fitted onto the implants with a torque of 30Ncm. The marginal discrepancy at implant-abutment connections was measured with confocal laser scanning microscope.
One-way ANOVA and Tukey\'s post hoc test was done for statistical analysis.
One-way ANOVA revealed a significant difference in marginal misfit of abutments. The mean marginal misfit was lowest for stock abutments (0.35 ± 0.009 μm). Among the customized abutments, the mean marginal misfit was highest for cast abutments (2.44 ± 0.445 μm) followed by sintered abutments (1.67 ± 0.232 μm) and least for milled abutments (0.65 ± 0.041 μm). A significant difference was found in marginal misfit with cast abutments and sintered abutments when compared to stock abutments (P < 0.001). The difference in marginal misfit was insignificant between stock abutments and milled abutments (P = 0.052).
Difference in marginal misfit exists between the titanium stock abutments and customized CoCr abutments. Among the customized abutments, milled CoCr abutments have the least marginal discrepancy and cast CoCr abutments have a maximum marginal discrepancy. Milled CoCr abutments can be used as an alternative to titanium stock abutments.
In vitro comparative study.
A total of 40 abutments were included in the study. Ten titanium stock abutments were used as control (Group CN) and 30 CoCr abutments were fabricated and taken as the test group. Stock abutments were scanned and from obtained images test group abutments were fabricated as follows: Ten cast abutments (Group CA), 10 sintered abutments (Group SA), and 10 milled abutments (Group MA). Endosseous implanst having internal hex connections were matched with 10 stock abutments and 30 customized CoCr abutments. Implants were mounted in a clear epoxy resin block and the abutments were then fitted onto the implants with a torque of 30Ncm. The marginal discrepancy at implant-abutment connections was measured with confocal laser scanning microscope.
One-way ANOVA and Tukey\'s post hoc test was done for statistical analysis.
One-way ANOVA revealed a significant difference in marginal misfit of abutments. The mean marginal misfit was lowest for stock abutments (0.35 ± 0.009 μm). Among the customized abutments, the mean marginal misfit was highest for cast abutments (2.44 ± 0.445 μm) followed by sintered abutments (1.67 ± 0.232 μm) and least for milled abutments (0.65 ± 0.041 μm). A significant difference was found in marginal misfit with cast abutments and sintered abutments when compared to stock abutments (P < 0.001). The difference in marginal misfit was insignificant between stock abutments and milled abutments (P = 0.052).
Difference in marginal misfit exists between the titanium stock abutments and customized CoCr abutments. Among the customized abutments, milled CoCr abutments have the least marginal discrepancy and cast CoCr abutments have a maximum marginal discrepancy. Milled CoCr abutments can be used as an alternative to titanium stock abutments.
摘要：
UNASSIGNED：基台与植入物的精确配合是整个组件中均匀的载荷分布所必需的。该研究旨在使用适当的扫描技术，比较在内部六角种植体-基台连接中采用不同制造工艺制造的钛基台与钴铬（CoCr）定制基台的边缘失配。
UNASSIGNED：体外比较研究。
UNASSIGNED：本研究共包括40个基台。将10个钛基台用作对照（CN组），并制作30个CoCr基台并将其用作测试组。对基台进行扫描，并根据获得的图像制作测试组基台，如下所示：十个铸造基台（CA组），10个烧结基台（SA组），和10个铣削基台（MA组）。具有内部六角连接的骨内植体与10个基台和30个定制的CoCr基台相匹配。将植入物安装在透明的环氧树脂块中,然后以30Ncm的扭矩将基台安装到植入物上。用共聚焦激光扫描显微镜测量种植体-基牙连接处的边缘差异。
UNASSIGNED：单因素方差分析和Tukey的事后检验进行统计分析。
UNASSIGNED：单向方差分析显示，基台的边缘失配存在显着差异。股票基台的平均边际失配最低（0.35±0.009μm）。在定制的桥台中，铸造基台的平均边缘失配最大（2.44±0.445μm），其次是烧结基台（1.67±0.232μm），而铣削基台的平均边缘失配最小（0.65±0.041μm）。与库存基台相比，铸造基台和烧结基台的边缘失配存在显着差异（P<0.001）。基台和铣削基台之间的边际失配差异不明显（P=0.052）。
UNASSIGNED：钛金属桥台和定制的CoCr桥台之间存在边际失配的差异。在定制的桥台中，铣削的CoCr桥台具有最小的边缘差异，而铸造的CoCr桥台具有最大的边缘差异。铣削的CoCr基台可用作钛原料基台的替代品。
UNASSIGNED：体外比较研究。
UNASSIGNED：本研究共包括40个基台。将10个钛基台用作对照（CN组），并制作30个CoCr基台并将其用作测试组。对基台进行扫描，并根据获得的图像制作测试组基台，如下所示：十个铸造基台（CA组），10个烧结基台（SA组），和10个铣削基台（MA组）。具有内部六角连接的骨内植体与10个基台和30个定制的CoCr基台相匹配。将植入物安装在透明的环氧树脂块中,然后以30Ncm的扭矩将基台安装到植入物上。用共聚焦激光扫描显微镜测量种植体-基牙连接处的边缘差异。
UNASSIGNED：单因素方差分析和Tukey的事后检验进行统计分析。
UNASSIGNED：单向方差分析显示，基台的边缘失配存在显着差异。股票基台的平均边际失配最低（0.35±0.009μm）。在定制的桥台中，铸造基台的平均边缘失配最大（2.44±0.445μm），其次是烧结基台（1.67±0.232μm），而铣削基台的平均边缘失配最小（0.65±0.041μm）。与库存基台相比，铸造基台和烧结基台的边缘失配存在显着差异（P<0.001）。基台和铣削基台之间的边际失配差异不明显（P=0.052）。
UNASSIGNED：钛金属桥台和定制的CoCr桥台之间存在边际失配的差异。在定制的桥台中，铣削的CoCr桥台具有最小的边缘差异，而铸造的CoCr桥台具有最大的边缘差异。铣削的CoCr基台可用作钛原料基台的替代品。
