Retraction Note: Narrow- versus mini-implants at crestal and subcrestal bone levels. Experimental study in beagle dogs at three months (Clinical Oral Investigations, (2015), 19, 6, (1363-1369), 10.1007/s00784-014-1381-4)

The Editors-in-Chief have retracted this article. After publication, concerns were raised regarding highly similar images in Figs. 2b, 2e and 3 in this article and Figs. 1 and 2 in the authors' other article that was submitted and published within a similar time frame [1]. The authors have stated that these errors occurred due to incorrect file storage. The Editors-in-Chief therefore no longer have confidence in the presented data. Rafael A. Delgado-Ruiz does not agree to this retraction. The Publisher has not been able to obtain current email addresses for José Luis Calvo-Guirado, Marcus Abboud and Gerardo Gómez-Moreno. None of the other authors have responded to any correspondence from the editor or publisher about this retraction.