Removing a chinchilla tooth is not a thing to take lightly, a x-ray needs to be taken to prove or disprove a abscess and it needs to be taken to see if the tooth actually can be removed or is it structurally impossible due to shape or surrounding tissue. Even if the tooth is removed, dental abscesses are almost impossible to get rid of-the "socket" with the infection is deep-sometimes the abscess will produce a fistula externally through the bone and it can be opened and debrided or antibiotic beads can be inserted into the socket, but the chin will be on long term antibiotic therapy-baytril and flagyl together are the best combination to use-the flagyl works on anaerobic bacteria that live deep in the socket and the baytril helps stave of upper respiratory infection which commonly happen in this type of situation. Either way, chin also needs to be on pain meds now-if the abscess is periodontal sometimes the pain is not bad but if its periapical, its horrid so I would at least want metecam for pain, if that did not work I would add tramadol and if it still did not cut it I would want a opiod like buprenex. Also handfeeding is a must, chin needs as least 60ml of syringe feed a day, broke up into 4 or so feedings, if the chin does go through all this it needs its strength.