engleski

Automatic Determination of Deformations at External Fixater in Medicine by Means of Electronic Theodolite

At this paper is presented an automatic determination of deformations at a fixater in medicine by means of an electronic theodolite Kern E2 and notebook. We determined some shifts measured points on the Ilizarov’s external fixaters and model of thigt-bone fixed by ones, under load of different directions and magnitudes. We compared some shifts at classic and hybrid form Ilizarov’s external frame. The distance between the electronic theodolites and the experimental models (model of thigh-bone with external frame) was 2 m. The standard deviation of determinations positions of points at experimental model was 0.006 mm.This method has an advantages in comparison with the methode by means of micrometers-devices. That enables an space determination of deformity the fixaters at numerous points on external frame in three directions. It is not possible by means of micrometers-devices. In comparison with the photogrammetric method this methode with electronic theodolites provides major grade of precision. We had measure some amounts of deformations at experimental models (thigh-bone models with external frames) under load of different directions and magnitudes. Finally, we conclude: some deformations at a hybrid form of Ilizarov’s external frame are three times less (300%) than at a classical form. Above described method by means of the electronic theodolites and notebook will enable some testing of any new improved constructins of external frames in the medicine

precise testing of external fixateur

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