Ha! ha! Lehaut about not arguing with someone with sharp tools in your mouth! Agree wholeheartedly with that.
There are some dentists who always insist on talking to you when your mouth is open and you are at your most vulnerable! Fortunately, my present dentist is not one of those.
Thanks for the recommendation of Philips Sonicare model. I think I saw one on offer in Amazon. Thought I'd get one and then I'll have a toothbrush ready when the present head wears out on my present one.
Sometimes I do wonder if it's cheaper eventually to buy one at low cost with say 3 heads included than to go for an expensive one and spend another small fortune for extra brush heads. Having said that, one head can last for months. I don't change them after 6 months as recommended. If all the bristles are still nice and straight, I keep the head until the bristles start splaying out.
Thank you again, Lehaut, for being always patient and generous with your time and advice.