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Age Effect on Orthodontic Tooth Movement in Rats

Department of Orthodontics & Oral Biology, and
¹ Department of Preventive and Curative Dentistry, University Medical Centre Nijmegen, College of Dental Science, PO Box 9101, 6500 HB Nijmegen, The Netherlands;

View larger version (21K): [in a new window]   Figure 1. Schematic view of the orthodontic appliance design. Two incisors are pinned together by a ligature wire going through the snout. Three molars are circled by a ligature wire and bonded together by a light-cure material. A force of 10 cN is applied by a super-elastic spring.

View larger version (23K): [in a new window]   Figure 2. Force-deflection curve of 10 cN coil springs used in this study.

View larger version (11K): [in a new window]   Figure 3. Experimental tooth movement in mm (mean and standard deviation) during the experimental period in young and adult rats. N’s for both young and adult rats at 1, 2, 3, 4, 8, and 12 weeks were 30, 25, 25, 20, 15, and 10, respectively.