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Oral health with fixed appliances orthodontics

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Orthodontic treatment represents an important fraction in dental interventions. According to other medical methods the question for scientific evidence for the effectiveness of these treatments arises. The question of the effectiveness is connected with the question what is understood as an effect. In principle, the effect of the intervention is understood on the basis of the occlusion or dental health, what disregards further functions of oral health. The generalization to oral health is therefore a necessary consideration in science now. If one appreciates this further development, then there is no one single randomised study available which examines the long-term effect of the orthodontic intervention or for the effects on the oral health. The question, whether the application of a fixed appliance in an orthodontic treatment causes a long-term improvement in oral health, cannot be answered at the present time. The scientific status is the definition of oral health at present. Also the question, whether in the long run the dental health can be improved by fixed appliances cannot be answered with a quality usually achieved by evidence-based medicine. Whether correction of a dental malposition is an effective prerequisite for the preservation of the natural teeth, cannot be answered. There is no generalizing study with sufficient scientific background for Europe or Germany to this topic. The risk for caries cannot be quantified. Caries is identified as a central topic in general but due to numerous factors influencing the risk it is not quantified. The question of the indications is completely open from the scientific literature. For the question of the therapy need or therapy priority some indexes were developed, which lead to a quantification. These indices however are fundamentally criticised by recent research in their meaning and the empirical relevance. There is an impression that there exists a big gap between the practical application and the scientific investigation of this effectiveness of fixed appliances or orthodontic treatment in general. There is much research in the area of diagnostics or further development of appliances or techniques done, however extremely few in the area of need for intervention, analysis of the sustainability; influence factors on the success, like caries or quantification of side effects e. g. root resorption. This research to evaluate the indications is completely lacking, also the required evaluation parameters (e. g. means long-term dental maintenance). This gap is in this respect dubious since a link of determin


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