its not common for you to get infected after havin temp.veneers.you probably got infected because his instruments werent properly cleaned,disinfected and sterilised.also having a root canal on your front tooth,you would have to look after it,as the tooth is more prone to cracking and breaking(if you grinde your teeth at night or bite something hard)you can easily crack it because the tooth is now more fragile as there is no nerve,its simply a dead tooth.so be careful not to crack it as you may have it infected and then extracted.
as for the dentist,it sounds like he doesnt know what he is doing.maybe find a way out and see someone who specializes in the field of cosmetic dentistry
Thankyou so much for your reply - I really appreciate your comments!
If you require a root canal on your front tooth, you may want to consider getting a crown on that tooth instead of a veneer as it provides some more structural support. You may want to ask your dentist about it. I wouldn't say that the root canal was caused by dirty instruments. It maybe due to the preparation work done to reduce the tooth to create space for a veneer which caused some irritation or exposure of the pulp of the tooth, thus requiring a root canal. Its possible to require a root canal but I wouldn't say its common.
Thanks, Im going to check into some cosmetic dentists this week.