I have anterior osteos too, c 4-5-6, and my chiro was aware of them.
So he took extra care to not adjust in those areas.
I went to him for many years with no problems.
He was skilled/experienced (25 yrs) in other healing modalities as well as adjusting.
Not a rookie at all...

But I didn't have any disk issues.
My pain was from chronic repetitive strain injuries & poor work postures.