It is not uncommon for some children’s teeth to be affected by hypomineralisation (Molar hypomineralisation or ‘MH’ and Molar Incisor Hypomineralisation or ‘MIH’). In simple words, the teeth have white/yellow/brown marks on them and appear ‘chalky’. These marks can present on some teeth and may have been caused by a variety of reasons. These teeth can also be sensitive and more susceptible to chipping. Sometimes white marks on teeth are indicative of the beginning of dental decay and teeth which have had a knock may show discolouration too. This is why it is important for us to check these ‘chalky’ teeth and advise any treatment that may be required.