Knapp J F, McMahon J I
J Am Dent Assoc. 1984 Nov;109(5):725-7. doi: 10.14219/jada.archive.1984.0180.
A case of a young girl with a triple primary tooth that retarded normal development of the maxillary left lateral incisor is described. The primary tooth was extracted to encourage normal development of the permanent tooth. Subsequent examination of the extracted triple tooth suggests that it was composed of the primary left lateral incisor fused either to a geminated central incisor or to a fused central incisor and supernumerary tooth.
描述了一例年轻女孩患有三颗融合乳牙的病例，该乳牙阻碍了上颌左侧侧切牙的正常发育。拔除该乳牙以促进恒牙的正常发育。对拔除的融合牙的后续检查表明，它是由左侧乳侧切牙与双生中切牙或融合中切牙及多生牙融合而成。
