Thank you for explaining about the problem with my husband's tooth. I now have at least some understanding of what is going on. The dentist and perio really don't give much info. They just say - oh well - have to do it again. Fortunately they are not charging him. It cost us a small fotune for the implant - about $4,000 I think. Anyway - my dental specialist who is highly respected in his field said that implants are the way to go - not root canals. That is what you said in your post. Unfortunately, because of my medical condition I would have to just have an extraction and nothiing else. My nervous system is so miswired the nerves go crazy after any dental procedure.
Thanks again - as always - for your very thorough explanation of the procedure and problems which could arise.
Sydney