The internal taper connection with 45° medium taper angle and internal hex anti-rotation protection, tried and tested for over 20 years, was introduced with the launch of the first BEGO Semados® implants.
Given the very positive experience with this connection type, it has been incorporated into all the following implant ranges with an internal connection from BEGO Implant Systems and plays a key role in the international success of BEGO Semados® implants.
The 45° cone
If the cone angles in the implant-abutment connection are small, the implant body spreads when subjected to masticatory loading. Similar to splitting wood with an axe, a wedge effect develops. This wedge effect results in additional loading in the bone (Fig. 2a). Implant-abutment connections with larger cone angles (e.g., 45°) avoid this wedge effect and bone loading is reduced (Fig. 2b) .
To ensure no bacteria enter the implant-abutment connection, it is essential to avoid development of a micro-gap between the implant and abutment when subjected to masticatory loading. Trials  and finite element calculations  have shown that no micro-gap forms when a 45° cone is used when subjected to physiological masticatory loading.
- Flach, M. / Streckbein, P. (2009): Knochenfreundlicher Kompromiss, Dental Magazin, 27:48-53.
- Zipprich, H. / Weigl, P. / Lange, B. / Lauer, H.-C. (2007): Erfassung, Ursachen und Folgen von Mikrobewegungen am Implantat-Abutment-Interface. Implantologie, 15:31-46.
- Streckbein, P. / Streckbein, R. G. / Wilbrand, J. F. / Malik, C. Y. / Schaaf, H. / Howaldt, H. P. / Flach, M. (2012): Non-linear 3D evaluation of different oral implant-abutment connections, J Dent Res, 91:1184-1189.