The growth of osteoma is soakage.Osteoma' boundary organ reflect the biological behavior of osteoma. Therefore

it's important to study the fractal characteristics of osteoma boundary.However

there was lack of quantitative parameters depicting these characteristics in the past.With regard to the osteoma of soakage growth

the prognosis is different because of various degree of soakage.It is necessary to use the characteristic parameter in order to reflect soakage growth degree of osteoma. Thus

the fractal characteristics of osteoma boundary is discussed in this paper. Our results show that fractal dimension can preferably reflect the soakage growth of osteoma' boundary organ. It is a robust characteristic parameter in describing different pathological changes degree of osteoma and prognosis. This provides a new useful approach for lucubrate of osteoma.