My dental health is something I have always taken seriously — and as a gadget fan, I’ve spent hundreds of pounds on the latest high-tech electronic toothbrushes and expensive toothpastes, gels and mouthwashes. But then I had to go without brushing my teeth for a fortnight. This was for a new two-part series on dental health for the BBC, and what we discovered was truly eye-opening, with implications not just for me, but for all of us. My wife was anything but keen on the no-brushing experiment and there was a lot less kissing during that fortnight. And she was...