Hi, 3-4mm of Tooth is more than enough for a successful crown. Yes the post & core needs to be done to gain some more support for the crown to be held in position. If done correctly and perfectly the post & core alongwith the crown should last you at least 15 years provided you avoid biting from the front completely. I would like to see you for a consultation so that we can assess the tooth and restore it. Our website is www.delhidentistspa.com
Next Steps
You can contact us on and we would be more than happy to see you as soon as possible
Health Tips
Completely avoid biting on that tooth