Retraction to: Mund Kiefer GesichtsChir (2003) 7:241–245

DOI 10.1007/s10006-003-0487-7

This article has been retracted due to duplicate publication. The original paper was published 2002 in Int. J. Oral Maxillofac. Surg. 31:345-348. DOI 10.1054/ijom.2002.0290.