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  • Title: A cephalometric study to compare the effects of cervical traction and Andresen therapy in the treatment of class II division 1 malocclusion. Part 2--Dentoalveolar changes.
    Author: Derringer K.
    Journal: Br J Orthod; 1990 May; 17(2):89-99. PubMed ID: 2357464.
    Abstract:
    Absolute distal movement of upper first molars together with distal tipping, but no significant extrusion, occurred with cervical traction. Distal movement of the maxillary first molars was more stable in the group where maxillary 2nd molars had been extracted. With Andresen treatment a restraining effect took place on the upper molars, while mesial movement of the lower first molars contributed to correction of the molar relationship.
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