The tooth abscesses because of trauma-injury to face or occlusal trauma due to bruxism(clenching or grinding) , large decay or a large filling.
You need to mechanically rub against the surface in between the teeth and this is only achieved by flossing.
It is like rinsing out a dirty plate with only water as opposed to getting a sponge and actually rubbing off the caked on food on the plate.
Hope this helps
Is the patient medically compromised-on blood thinners or very sick and needs to be treated in a hospital setting where it is safer for the patient.
The complexity of the extractions-are the teeth up or near the sinuses for top teeth or for lower teeth in the nerve canal or impacted where major surgery or bone removal is required to remove them.
The last factor has to do with the skill and/or comfort level of the general dentist doing the wisdom tooth extraction.
Liquid and soft diet a must and avoid biting into the tooth/teeth involved.
You must see a dentist for follow up care regularly.