1. Pizzo G, Licata ME, Guiglia R, et al. Root resorption and orthodontic treatment. Review of the literature. Minerva Stomatologica, 2007,56(1–2):31–44
2. Lopatiene K, Dumbravaite A. Risk factors of root resorption after orthodontic treatment. Stomatologija, 2008,10(3):89–95
3. Faltin RM, Faltin K, Sander FG, et al. Ultrastructure of cementum and periodontal ligament after continuous intrusion in humans: a transmission electron microscopy study. Eur J Orthod, 2001,23(1):35–49
4. Levander E, Malmgren O. Long-term follow-up of maxillary incisors with severe apical root resorption. Eur J Orthod, 2000,22(1):85–92
5. Chen WJ, Li QY, Gong AX, et al. Comparison between J-hook and micro-implant anchorage in the treatment of patients with bimaxillary protrusion. Zhonghua Kouqiang Yixue Zazhi (Chinese), 2008,43(2):83–86