Table 1. Summary of short and long term effect of subcutaneous aerogel implant on local tissue.

Incubation PeriodResponse	Two weeks		Twenty months
	Clear	Pigmented	Clear	Pigmented
Inflammation	Mild	Mild	Mild	Mild
Fibrosis	Mild	Mild	Mild	Mild
Infection	None	None	None	None
Implant travel	None	None	None	None
Age of rat at time of extraction	∼3 months		∼2 years

Slides from both control and implant-containing rats were reviewed blindly by pathologist, specifically looking for signs of inflammation, infection, fibrosis, and implant travel.