Pig with missing tusk?

Hi all trying to get some info on pig tusks. I have a 6 yr old male nuetred  kune kune mix pig. He had 2 tusks .. Now I only see one. Can't find a lot of info but I think they don't shed right? He's fairly gentle and I checked as best he would let me, and I just don't see it. He let me pet him , he's not in any pain, I don't see any obvious damage, they don't have wild fights.  Any one experience this?

Yes, boars will end up removing tusks through any number of accidents......fights, of course, but just as often getting them stuck on fencing and then having them break off near the gum-line if  they struggle to get free.  When we occasionally need to 'de-tusk' a boar, it's often done using obstetric 'saw-wire' where you loop the wire around the tusk to be removed and saw back and forth while the boar tries to break free.  Usually only takes 5=10 seconds for the tusk to pop off.  From what I've read, the only concern in any case is any breaking below the gum-line that could cause infection.  But if it breaks and leaves a stub where the tusk was, he should be fine.

Ahhh he did get caught one on the fence once, and I had to cut the fence to free him.  This explains it. Thanks so much!

It is common for KuneKunes to lose a tusk.  

Smart people already answered but I thought I'd get on and say I have seen my guinea hog boar break his tusks pretty regular. He's not fighting or getting up to all that much I think it's just normal wear and tear. I like that none of them are sharp. ;)

Appreciate your insight. Good to know it's a fairly normal situation.

The boys thank you