3Khalaf K,Robinson DL,Elcock C. Tooth size in patients with supemumerary teeth and a control group measured by image analysis systern[J].Arch Oral,2004,(2):243.
6Shibd H,Nakamura S,S hirakawa M. Effects of basic fibrobiast growth factor on proliferation,the expression of osteonectin and alkaline phosphatase,and calcification in cultures of human puip cells[J].{H}DEVELOPMENTAL BIOLOGY,1995,(2):457.
7林久祥.现代口腔正畸学[M].22版.北京:中国医药科技出版社,1996:32.
8Fischer TJ, Psahis GL. The diastema and the abnormal fre num[J]. ASDC J Dent Children,1981,48(4) :264.
9Baird A, Walice PA. Fbroblast growth factors[J]. Med Bull, 1989,45(2) :438.
10Shibd H, Nakamura S, Shirakawa M, et ah Effects of basic fi brohiast growth factor on proliferation, the expression of os- teonectin and alkaline phosphatase, and calcification in cultures of human pulp cells[J]. Dev Bio1,1995,170(2) :457.