[The problem of the reproducibility of occlusal contacts].
To perform target orientated therapy simulators of condyle movements (CPS) have been introduced recently. It is believed to improve analysis of jaw by computer aided registration and evaluation systems (i.e. transformation of the true axis and jaw movements for use in articulators). Although the electronic evaluation systems helped to improve our understanding of the movements of the jaw, up to now the reproduction of physiological and pathological movements and their therapeutic changes have not been solved satisfactorily. The reason is sometimes miscorrection of system inherent projection errors. Additionally, numerical analysis and changes of the registered pathological movements are restricted to certain limits within the articulators for therapeutical purpose.