Predictability of a New Orthodontic Extrusion Technique for Implant Site Development: A Retrospective Consecutive Case-Series Study

Figure 1

Clinical case #8: tooth 2.4, 150 g force spring cemented into the canal root by resin cement in order to exert the extrusion force along the same tooth axis. Time: T0; A: tooth 2.4 endodontically treated and trimmed; B: 150 g force spring cemented into the canal root; C: square section of an orthodontic steel wire of 0.019 × 0.025 inch anchored to the near teeth and to the spring by composite resin.