1 Kim SK, Koak JY, Heo JS, Taylor TD, Ryoo S, Lee SY: Screw loosening with interchangeable abutments in internally connected implants after cyclic loading. Int J Oral Maxillofac Implants 2012; 27:42-47 2 Keilig L, Berg J, Söhnchen P, Kocherovskaya, Bourauel C. Micro-mobility of the implant/abutment interface for original and third-party abutments – a combined experimental and numerical study (Poster EAO 2013, Dublin, ref. no. 346). 3 Data on file. 4 Sakaguchi RL, Douglas WH, DeLong R, Pintado MR. The wear of a posterior composite in an artificial mouth: a clinical correlation. Dent Mater 1986;2(6):235-240. 5 Rosentritt M, Behr M, Gebhard R, Handel G. Influence of stress simulation parameters on the fracture strength of all-ceramic fixed partial dentures. Dent Mater 2006:22(2):176-182.