Correction to:

J Orofac Orthop (2011) 72:457–468

https://doi.org/10.1007/s00056-011-0050-3

The original version of this article contained two mistakes:

  1. 1.

    In the article the number of rats in each group of the experiment is given as 8. In fact, however, the number of rats in each group of the experiment was 6.

  2. 2.

    It was not made clear in the article that the article is based on the following master thesis: Zhou Jianping (2011) Expression of osteoprotegerin and its ligand mRNA in orthodontic tooth root resorption in rats. Published master thesis, Chongqing Medical University (https://kns.cnki.net/KCMS/detail/detail.aspx?dbname=CMFD2011&filename=2010269483.nh).