Dry socket is when the blood clot formed after an extraction becomes dislodged from the extraction site. This blood clot is the material that will later turn into gum tissue and bone. If this is prematurely disrupted, the bone that supports the teeth is left exposed. This becomes very painful and can get easily infected.
One of the ways to prevent a dry socket after extraction is by avoiding straws or smoking. When a person drinks liquid through a straw or smokes, a vacuum is created. This vacuum puts negative pressure on the site where it was extracted from. The blood clot formed could be dislodged and dry socket could be the result.
Right after having extractions it is necessary to avoid rinsing your mouth. When brushing allow water to flow into your mouth easily and let it fall out of your mouth easily. Try not to spit or swish too much. This can, again, cause negative pressure on the blood clot and dry socket could be the result.
Keeping the socket moist will help. You can use vaseline or clove oil (is best) on a piece of gauze for the first 2-4 days. And don't take blood thinning aspirin before or after the extraction. This should prevent anything the PG might could cause.
PS I'm not a nurse but I play one at home so reader beware.
I hope this was helpful GNNR.