Читать книгу Applied Oral Physiology - Robin Wilding - Страница 47

Teeth are not fixed in the tooth socket but are displaced by even light forces. A maxillary incisor moves about 10 μm when a horizontal load of 0.5 N is applied. The tooth becomes progressively firmer as the load continues (see Appendix C.1 Tooth Displacement). The fibers of the ligament may suspend the tooth in the socket and so come under tension when the tooth is intruded. However, it is likely that other forms of support are also involved, as intrusion of an incisor tooth causes expansion of the alveolar plates of bone on either side. This observation suggests that the tooth is also supported by compression of the ligament (see Appendix C.2 Tooth Mobility).