Hello Dr. Moore. My wife has received unsuccessful endodontal treatment for infection in the roots. She has been advised that an extraction will be required if the infection flares up, but a crown on the tooth after sectioning has been suggested as an option. The tooth would be sectioned and half extracted (with two roots from which the infection could not be removed). A crown would then be fitted to the remaining half. Please would you let me know if this is an established technical procedure, how successful is it and is it commonly offered privately in the UK? Thank you, I look forward to hearing from you.