Dentist here, in terms of replacing root canals. The technique described in the paper would not replace the nerves and blood vessels in the root canal system.

It just shows a new method for sealing off the root canal system - via a blood clot.

Unfortunately you would still need to have the root canal treatment - just the sealing may be slightly quicker with this method.

The quality obturation (apical seal) doesn’t really effect the clinical outcome o of root canal so unlikely will mean better outcomes either.