About four years ago my dental hygienist told me to bin my Oral-B electric toothbrush and use a Phillips Sonicare instead. Last week, having changed dental practice, the dental hygienist told me to bin the Sonicare and buy an Oral-B. So, what is the consensus of opinion? Do different professionals genuinely have different opinions? Does toothbrush technology change so rapidly that brands leapfrog each-other regularly? Or do dental practices get flung a bung by manufacturers to punt their wares?