Reply to the letter to the editor by Liu and Li

Abstract

We thank the colleagues Liu and Li for their interest in our work and for their commenting letter. As to the first comment, the location of the bone screws has, of course, been a concern when planning the study. To apply the technique, it was necessary to choose locations with a cortical thickness of at least 4 mm. This was always the case in the locations we chose for screw implantation. However, 4 mm will not always be present in the locations the colleagues Liu and Li suggested. In future studies, screw positioning may be optimized, and one might consider using a surgical navigation system for exact screw positioning.