Tissue behavior during orthodontic tooth movement

Abstract Some of the present observations may be summarized as follows: Contraction of fibrous structures after tooth movement must be considered a normal tissue reaction. After a tipping movement this contraction may produce compressed cell-free areas on the traction sides. The ensuing undermining bone resorption may increase the relapse tendency. The mechanics involved in a bodily movement tend to favor a direct bone resorption on the pressure side. Following rotation, tension and displacement of supra-alveolar structures may persist even after retention. Early treatment or overrotation may, to a large extent, prevent relapse tendencies.