[Elastic open activator].
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Biomedical subjects
Publications and source records attributed to U Langbein.
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In order to check the efficiency of orthodontic therapy a clinical examination and model analysis were done in patients in a two-year-interval. The individuals were a part of different longitudinal group --patients after treatment with removable appliances, --patients after premolar extraction, --control group. The results show that functional disturbances can be observed earlier and more frequently in patients after extraction therapy. With advancing years the difference of functional disturbances between the groups becomes smaller.
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An attempt to assess the numerical grading of success with regard to the diagnosis, therapy and prognosis of anomalies of tooth alignment and occlusal position. Classifications according to Korkhaus, Angle and Eismann were evaluated using the original and final models of 42 patients who had been very co-operative. The importance and applicability in therapy and prognosis are assessed.
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