[The dental arch and three-dimensional imaging].
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Biomedical subjects
Publications and source records attributed to L Petitpas.
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Jaw equilibrium is one of the most important goal to achieve, during orthodontic treatment. The clinical diagnosis of discal dislocations allows to track them systematically and avoids many dysfunctions which are responsible of relapses.
Discal dislocations are not enough defined by the mandibular opening diagram. Understanding the anatomical phenomena surely helps to improve diagnosis. However, localizing the medial sagittal plane and the incisor midlines is of real importance to develop solutions, from a treatment standpoint.
During orthodontic displacement, integrity of root and periodontis needs the knowledge of forces systems developed by orthodontic appliances. Analyses of different tooth movement require some biomechanic rules especially to choose magnitude and direction of forces, with respect to the center of resistance and the C/F ratio. Forces systems developed by the Burstone segmented arch technique have to be shown biologic because they produce light and variable pressures according to patient age and rate of periodontal disease.