Barbet Teeth

As everyone who has met my dogs knows, they all have beautiful white teeth. I don't clean them, as I've never had to. They eat a raw and meaty bone diet, with a few other things added in, and have a good old time cleaning their own teeth at the same time as some recreational chewing. Lulu our 12 year old girl who we sadly lost earlier this year, started eating this kind of diet after she was re-homed by us, until that time she was eating commercially store bought foods, she never had a problem with her teeth either, never have we been to a vet for any dental issue. But.....this past week I have seen lots of reports on the use of Stag Bars  (small pieces of antler). I have been using these, and not had a problem with them, and the puppies too all had stag bars to help them while teething. Every now and again,something will crop up on various internet forums, which makes me wonder, who is behind it all. Is it the vet who is sponsored by a company that makes rival products? We all know that if you visit three different vets, they will undoubtedly give three different answers to what you are querying, whether it be food, neutering, excercise, supplements, or indeed vaccinations. 
We are all able to make up our own minds about what is good and what is not good for our dogs, and a little common sense needs to be applied. I would have thought that if a tooth is broken or chipped by chewing on a Stag bar, then there must have been a weakness in the tooth already, and surely chewing anything could produce the same result. Rather like those who won't eat toffee in case it pulls out a filling :-)  
Anyway, here is the link to Stag Bar and a response from them after all the internet activity of the past few weeks. 
https://www.facebook.com/pages/Pure-Dog-natural-treats-for-dogs/135463099839961?fref=ts