Review on Philips Sonicare ProResults Replacement HX9023 by Elizabeth French

This replacement toothbrush heads HX9023/64 new version. The noticeably loud rattling vibrations of the new head version are an indication that the cleaning energy is being wasted as vibration noise due to a poor fit. Much louder noise than ever heard from the original heads. I've had a Philips Sonicare FlexCare Plus Sonic HX6972/10 electric toothbrush for years and the old HX6023/90 replacement brush heads have never been this noisy and I've compared them to the unused old brush head model I had.