6、elopment,ofthepupilsintheoldfluorosisareaissignificantlydecreasedsincetheydrinkinglowfluoridecontentwater.Thedelayrateofbone-agetendstobethatofthenormalgroup.Conclusions Removinghighfluoridefromdrinkingwatercanbenefittothebodydevelopmentofthelocalpupils. Ke