Homology and heterology of cephalometric landmarks: Methodological consequences

With interest I read the study ‘Effects of maxillary protraction for early correction of class III malocclusion’ by Celikoglu and Oktay (1). The authors should be complimented for careful work. Apparently, much effort was taken to avoid traditional pitfalls in the (prospective) collection of study subjects and controls, in reporting measurement technique and in statistical procedures.