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J Dent Res 20(2): 133-141, 1941
© 1941 International and American Associations for Dental Research
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THE INCIDENCE OF ROOT RESORPTION OF VITAL PERMANENT TEETH

SAMUEL HEMLEY D.D.S.1

1 Department of Orthodontics, New York University, College of Dentistry

Of a total of 4,959 teeth exposed to orthodontic therapy, only 172 teeth (3.5 per cent) showed any evidence of root resorption. Of this group, only 8 teeth (0.2 per cent) involved as much as frac13 of the root, and no teeth suffered a loss of more than approximately frac13 of the root. It is thus apparent that the incidence of root resorption can be reduced to the extent that it need not be regarded as a hazard to orthodontic treatment.

Submitted on February 11, 1941






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