[Quantitative analysis of blood flow changes measured by radioactive microsphere technique after segmental anterior...

The radioactive microsphere technique was used to study quantitatively the blood flow changes after segmental anterior maxillary osteotomy in dog. The results of experiment indicated that the blood flow of gingiva and alveolar bone in segmental side has not significantly changed compared with that of the control side after anterior maxillary osteotomy with intact labial and palatal soft tissue flaps. The blood flow of alveolar bone in segmental side was significantly lower than that of the control side (P < 0.01) when only the labial flap was kept intact, the blood flow of labial and palatal alveolar bone in segmental side was 55.5% and 60.28% lower than that of the control tissue respectively.