STOMATOLOGY EDU JOURNAL 2017, Volume 4, Issue 3 SEJ_3-2017_Online - Page 69

2.1. Medical History: The patients were healthy and were born at 38 weeks via an uncomplicated Caesarean section delivery. The mother developed food intolerance to dairy, wheat and fructose during the pregnancy and also took antibiotics during that time. During the first year of life, the twins also developed allergies to lactose and fructose and were given antibiotics for repeated otitis media infections. 2.2. Dental History: A detailed history, extraoral examination, intra oral examination and radiographic evaluation were conducted. Patient MB presented areas of white and yellowish brown discoloration in the surface enamel on teeth 21 and 46 (FDI Notation System), respectively. The defective enamel appeared to be of normal thickness and had a distinct boundary demarcating it from the unaffected enamel. The other FPMs and maxillary incisors seemed unaffected. A unilateral, left posterior crossbite was also observed involving teeth 64-26 and 74-36 (Figs. 1-5). Patient SB presented a similar white opacity on the labial surface of tooth 21 in addition to yellowish brown discoloration of the surface enamel in teeth 16, 26, 36 and 46. SB also had a unilateral, right posterior crossbite involving teeth 16-53 and 46-83 (Figs. 6-10). In both cases the MIH-affected teeth were not carious and there was no post eruptive breakdown involved. The patients initially reported no pain or sensitivity related to the MIH-affected teeth. Both MB and SB had good oral hygiene and reported brushing twice daily using fluoridated to