7Artun J, Urbye KS. The effct of orhodontic treatmem on periodontal bone support in patients with advanced loss of marginal pefiodontium. Am J Onhod Dentofacial Orthop, 1988, 93(2) : 143 -148.
8邵奕奕.成人牙周病患者正畸治疗后牙根吸收的研究.首都医科大学,2008.
9Johal A,Ide M. Orthodonticapp roachforpalientswi thseverepe riodontaldisease[J]. JWorldOr t hod, 2005,6 ( 3 ) : 275-280.