Hartlev J, Kohberg P, Ahlmann S, Gotfredsen E, Andersen NT, Isidor F et al. Immediate placement and provisionalization of single-tooth implants involving a definitive individual abutment: A clinical and radiographic retrospective study. Clinical Oral Implants Research. 2013;24:652-658. doi: 10.1111/j.1600-0501.2012.02442.x