RESUMO
D and the differences between groups were statistically significant(P0.05).Proliferation index increased in the early phase and reached the peak at the 4th post-operative week.Level of proliferation index in four groups was gradiently decreased from group A to group D.At the 4th post-operative week,differences of proliferation index were statistically significant between groups(P0.05).The changing trend of ratio of CD4+/CD8+ was similar to that of proliferation index.Histological observations showed inflammatory cells infiltrated in early phase gradiently decreased from group A to group D.At the 4th post-operative week,histological observations showed neovascularization in group D.At the 8 weeks post-operatively,more new bone formation was observed in group D. The correlation analysis showed significant positive correlation between proliferation index,CD4+/CD8+ ratio at the 4th post-operative week and the content of total lipid (P