Source of Support: None, Conflict of Interest: None
In an experimental study on fractures in 25 animal increased vascular response was observed in the experimental group commencing 2 days after the fracture, reaching a peak response at the end of 2 weeks, and the gradually subsiding to normal limits within 6 weeks, coinciding with the onset of union of the fracture. The arteriolar dilatation was more marked in comparison to the control group. In contrast, the capillaries in the control group revealed a more persistent dilatation. Union occurred at 7 weeks in the experimental group inspite of medullary nailing which is considered to damage the medullary vessels. An incomplete union however, was the outcome in the control group even at the end of 10 weeks.