don't know how long a whole cap lasts but it's not forever and would need regular replacing.
I broke both my front teeth, aged 10. snapped in half. Didn't have them capped but had a sort of matching bit of plastic type stuff stuck on somehow (using ultra-violet light??) You can't see the join at all.
But every couple of years one side or the ther falls off and have to get them redone. And because it is 'cosmetic' I have to pay.
The chip could be repaired in some cases with a composite material that matches his tooth colour.
Of course, this would depend on the amount of lost tooth structure. But in many cases it can be done.
But, because of the pressure that the tooth took, it could start to discolour (when the nerve inside dies), thus leading to a root canal treatment.
After this, he might want it bleached to help it 'blend in' to the natural colour of the other teeth. IME, this isn't a long term colour fix & the tooth can start to fade back to the darker colour. So, possible repeated bleachings.
It maybe that a veneer is advised, but they are difficult to match up on one tooth alone & sometimes, if the tooth is very discoloured, it is hard to disguise.
Also, a root treated tooth becomes very brittle, so a crown may be advised. They usually last around 5-10 years, depending on how it is looked after & how well fitted it is.
If you go with crowning straight off, he may be advised to have a root canal treatment first. Some dentists prefer to do it this way.
Then crowned once that is done. But again, the crown will only last some years & will need changing at some point in his life. Maybe even several times (seeing that he is just 10) as his mouth grows & changes & fair wear & tear of the crown.
So: If start with the composite
Filling Poss RCT due to discolouration Bleaching Veneer/crown (requiring replacement over the years)
Start with Crown Poss RCT Crown (requiring replacement over the years)