Briefly:
The filling of my 7th down right which has had a canal therapy few years ago, has split in two vertically. I had a Rx at the hospital but they adviced the tooth to be extracted. No mention to post crowns at all.
I recently searched the internet as I have had an experience with a post crown on the 6th up left, and came across a website where I found a few articles (I am afraid in Italian) talking about very difficult situations, solved with gum surgery, bone reconstruction and post crown. I would like to know if you have ever come across to this kind of problems and if exist in London a good Dental Surgeon able to do this kind of job. If at the end the only solution is the implant, it will be welcome, but if I have the opportunity to save in any way my tooth than I would be happier.
Here are the links. [dentisti-italia.it/casi_clinici/fratture-dei-denti/170_lembo-riposizionato-apicalmente-con-colla-di-fibri.html, dentisti-italia.it/casi_clinici/parodontologia/162_terapia-chirurgica-delle-lesioni-di-i-ii-iii-class.html, dentisti-italia.it/casi_clinici/protesi/248_dalla-parodontologia-alla-protesi-attraverso-tutta.html]

and very similar to my case according to this Italian dentist whom I had a email exchange [www.dentisti-italia.it/casi_clinici/parodontologia/161_terapia-chirurgica-delle-lesioni-di-i-ii-iii-class.html]

Thank you very much for your interest and kindness to read this question.