Orthodontic tooth movement is accompanied by tissue remodelling, which can be observed through bone apposition on the side under tension and bone resorption on the side under pressure. Without attachment, it is not possible to obtain this type of tissue transformation. Orthodontic tooth movement towards an infraosseous lesion does not allow attachment gain and increases the degree of bone damage around proximal teeth. In this situation, it is recommended to treat the lesion with a surgical periodontal regeneration technique before beginning the orthodontic displacement. According to the principle of guided tissue remodelling, a membrane placement leads to the formation of a newly regenerated tissue on the surface of the tooth under pressure. This tissue presents all the potential necessary for the formation of a new connective tissue attachment and leads to bone repair at the end of orthodontic displacement. Today, with the use of enamel matrix derivative, proteins can provide the same results as those obtained with membranes in the treatment of infraosseous defects. Therefore it is possible to use Emdogain® in a pre-orthodontic situation according to the principle of guided tissue remodelling.
Keywords: guided tissue regeneration, guided tissue remodelling, orthodontics