well if they were bonded in the first place I can't really see why it's not worth a go. Some kind of loctite would probably do and may seep in througj capilliary action. Read their website for exaclty the right stuff.
Ideally I'd see if they come out completely so you can check for cracks etc.
That said, at your own risk of course
The trouble being you might find out how effective the "Having a go" proved to be on a 50mph descent. Bars are one of the things I would never take a chance on, they don't have to break to throw you off, just swiveling in the clamp will do.