Thanks for asking the query,
According to your history in the accident one tooth is avulsed and three are chipped off, in this condition I would suggest you to get the x-ray done which will decide the treatment plan.
If your teeth are dead or non vital, and if the x-ray shows a good bone support you can complete the root canal
for the chipped tooth and get a post and core build up for your tooth, and if the tooth is infected at roots get the chipped pieces removed and replaced in position by a prosthetic bridge taking support from abutment tooth or an implant.
These are all treatment options for you, consult your Dentist
and discuss about this.
Hope this helps out.