© 1988 by European Orthodontic Society
An evaluation of the morphogenic and anatomic effects of the functional regulator utilizing the counterpart analysis
*Case Western Reserve University Ohio, USA
**University of Michigan Ann Arbor USA
***University of Connecticut Farmington, USA
1Prof. D. H. Enlow School of Dentistry Case Western Reserve University Cleveland, Ohio 44106 USA
The ‘counterpart’ procedure is an ‘anatomic’ means for determining morphologic and morphogenic conditions and relationships within an individual. Conventional cephalometric planes are not utilized, and population standards are irrelevant. Using lateral headfilms, this procedure analyses goodness-of-fit among regional anatomic parts in order to identify the composite of conditions that underlie facial form and pattern in a given person. The objective of the present study is to determine and evaluate the nature of morphogenic responses of some of these regional relationships in conjunction with treatment by the Fränkel appliance. A sample of 96 Class II division 1 patients receiving functional regulator treatment, and a match
d control group of untreated Class II individuals, were analysed. The findings revealed the nature of certain anatomic relationships the aggregate of which had mandibular protrusive results in a majority of the treated individuals. The findings also show that prediction of treatment outcome may be possible through consideration of different Class II craniofacial morphologic types. Of the types studied, based on different combinations of the regional morphologic variables comprising the counterpart analysis, correspondingly different growth changes related to treatment were observed.