In a combinedin vitroandin vivostudy strain gauges were used to register the deformation in two terminal implant abutment cylinders, when connecting three different prosthetic appliances. The prosthetic constructions were placed on the abutments and fastened bothin vitroandin vivoby using different torque sequences. Furthermore, in the in vitro situation the three medial abutments were replaced by abutments which were 100 μm shorter.The results show that even if the prosthetic constructions were judged to have a good clinical fit, relatively large External Preloads were registered bothin vitroandin vivo. No significant differences in axial force or in bending moment were found between the torque sequencesin vivo. There were, however, significant differences in axial force as well as in bending moment in thein vitroexperiment. When the shorter medial abutments were used in vitro, a change in the axial force of approximately 200N was registered. The results confirm that the methodological approach used in this study is valid when evaluating preloads