Factors Affecting Impaction of Wisdom Teeth and Their Mechanisms

  • Dapeng Lu
  • Yi Fan


As the food chain changes in human evolution, the human maxilla went through obvious degeneration, but the number and size of teeth within the jaw did not change. As the maxilla and maxillary dentition occlude with the mandibular dentition, the mandibular teeth are constrained by the maxillary teeth; in the meantime, the maxillary teeth limit the mandibular expansion and lateral growth. Therefore, the maxillary teeth/bone mass ratio is less than the mandibular teeth/bone mass ratio. However, the impaction rate of the wisdom tooth in the upper jaw is far less than that in the mandible.

Copyright information

© Springer Nature Singapore Pte Ltd. and People's Medical Publishing House 2019

Authors and Affiliations

  • Dapeng Lu
    • 1
  • Yi Fan
    • 2
  1. 1.Beijing Stomatological HospitalCapital Medical UniversityDongcheng District, BeijingP.R. China
  2. 2.Melbourne Dental SchoolUniversity of MelbourneMelbourneAustralia

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