2Anastasia F, Athena KS, Zaki B, et al. Incidence of impacted and supernumerary teeth-a radiographic study in a North Greek popula- tion[J]. Med Oral Patal Oral Cir Bucal,2011,16(1) :56 -61.
3Eduard F, Jordi PA, Elvira FA. A descriptive study of 113 uncrupted supernumerary teeth in 79 pediatric patients in Barcelona [ J ]. Med Oral Patol Oral Cir Bucal,2009,14 (3) : 146 - 52.
4Ahn Y, Sanderson BW, Klein OD, et al. Inhibition of Wnt signaling by Wise (Sostdcl) and negative feedback from Shh controls tooth num- ber and patterning[ J]. Development,2010,137 (19) :3221 - 31.
5Rajab LD, Hamdan MA. Supernumerary teeth : review of the litera- ture and a survey of 152 cases [J]. Paediatr Dent,2002,12(4) : 244 - 54.
6Ramakrishna A, Lambade P. Derttigerous cyst associated with ectopic canine and a supernumerary tooth: a rare occurrence [ J ]. J Surg Tech Case Rep,2013,5(2) :85-88.
7Rajab LD, Hamdan MA. Supernumerary teeth : review of the literayure and a surver of 152 cases[ J]. Paediatr Dent,2002,12(4) :244-254.
8Hattab FN, Yassin OM, Rawashdeh MA. Supemumeraryteeth : Report of three cases and review of the literature [ J]. ASDC J Dent Child, 2004,61 (5-6) :382-393.