LRP6 and Oligodontia: Abnormal expression of Wnt10b is related to oligodontia, microdontia, short tooth roots, dental pulp stones, and taurodontism.11–13 Mutation of Lrp6 is also associated with oligodontia, mesiodens, fusion of teeth, odontomas, microdontia, long roots, molars with unseparated roots, and taurodontism.