I had an emergency root canal done about two months ago. I do not have insurance and could only afford to have it drilled out and the nerve removed. A build up and crown was not done. I used a water pick to clean out the hole today and a foreign light foam or sponge like material came out. Two chunks of it. Does anybody know what this is? Did they just pack the canals with foam and not actually fill them? I am pretty freaked out and confused. Thanks.