The incidence of impacted teeth: A survey at Harlem Hospital

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Abstract

  • 1.

    1. Among the roentgenograms examined, 18.2 per cent demonstrate one or more impactions.

  • 2.

    2. Third molar impactions represent 94.8 per cent of all impactions.

  • 3.

    3. Maxillary third molar impactions (62.57 per cent) are in the majority, in comparison with mandibular third molar impactions (47.44 per cent).

  • 4.

    4. Unilateral third molar impactions are almost as frequent as bilateral third molar impactions.

  • 5.

    5. The Negro population investigated in this survey maintains an impaction ratio similar to that seen in previous Caucasian studies.

  • 6.

    6. The order of incidence of impactions is maxillary third molar, mandibular third molar, and maxillary cuspid, followed by the remaining impactions listed in Table IV.

  • 7.

    7. There appears to be no sex predisposition for impactions.

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