Toxic and essential trace elements in human primary teeth: A baseline study within The MoBaTooth Biobank and The Norwegian Mother, Father and Child Cohort Study (MoBa)

•Primary teeth as a biomarker for past chemical exposure in critical developmental periods, both pre-and postnatally.•A total of 18 different toxic and essential trace elements detected in teeth using LA-ICP-MS.•Using primary teeth to understand the precise timing of toxic exposures on vulnerable and susceptible infants and children.•Decrease exposure during critical developmental windows and prevent development of disease.