Two appliances are described. The first is a lingual arch carrying a Nance bulb and auxiliary springs for retraction of upper canines or premolars. The second is a retention appliance constructed at the chairside from Coe “Dental Guards”.
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References
1.
DixonD. A. (1970) Personal communication.
2.
NanceH. (1947) The limitation of orthodontic treatmentAmerican Journal of Orthodontics, 33, 177–223.
