Retraction.

Calvo-Guirado JL, Delgado Ruiz RA, Ramírez-Fernández MP, Abboud M, Janjic B, Maté Sánchez de Val JE. Histological and histomorphometric analyses of narrow implants, crestal and subcrestally placed in severe alveolar atrophy: a study in foxhound dogs. Clin Oral Impl Res. 2016;27: 497-504. The above article, published online on 9 February 2015 in Wiley Online Library (wileyonlinelibrary.com), and in Volume 27, pp. 497-504, has been retracted by agreement between the journal Editor in Chief, L Heitz-Mayfield, and John Wiley & Sons Ltd. The retraction has been agreed due to image discrepancies, resulting in unreliable data. Images in Figures 1a, 1b, 2a and 2b have been used in another publication representing different materials. Reference Calvo-Guirado JL, Delgado Ruiz RA, Ramírez-Fernández MP, Abboud M., Janjic B, Maté Sánchez de Val JE. Histological and histomorphometric analyses of narrow implants, crestal and subcrestally placed in severe alveolar atrophy: a study in foxhound dogs. Clin Oral Impl Res. 2016;27: 497-504. https://doi.org/10.1111/clr.12569.