1. Welander M, Abrahamsson I, Berglundh T. The mucosal barrier at implant abutments of different materials. Clin Oral Implants Res. 2008;19:635–41.
2. Huh JB, Rheu GB, Kim YS, Jeong CM, Lee JY, Shin SW, et al. Influence of implant transmucosal design on early peri-implant tissue response in beagle dogs. Clin Oral Implants Res. 2014;25:962–8.
3. Jung RE, Pjetursson BE, Glauser R, Zembic A, Zwahlen M, Lang NP. A systematic review of the 5-year survival and complication rates of implant-supported single crowns. Clin Oral Implants Res. 2008;19:119–30.
4. Chee W, Felton DA, Johnson PF, Sullivan DY. Cemented versus screw-retained implant prostheses: which is better? Int J Oral Maxillofac Implants. 1998;14:137–41.
5. Gapski R, Neugeboren N, Pomeranz AZ, Reissner MW. Endosseous implant failure influenced by crown cementation: a clinical case report. Int J Oral Maxillofac Implants. 2008;23:943–6.