Dentinogenesis imperfecta (DI) is a rare autosomal dominant hereditary dentin disorder characterized by tooth discolouration and translucency in both the deciduous and permanent teeth.1 Previous studies suggest that DI affects approximately 1 in every 6000–8000 individuals.2 To date, the dentin sialophosphoprotein (DSPP) gene is the only gene with variants known to cause DI, with over 50 heterozygous changes identified to date.3
We present the case of a male infant aged 7 months referred by his outpatient care paediatrician to a paediatric dentistry clinic due to the yellowish discoloration and amber-hued translucency of his deciduous teeth (Fig. 1 A). Periapical radiographs revealed obliteration of two-thirds of the pulp chambers, with no discernible changes in enamel thickness, crown structure or root size (Fig. 1 B). A review of the patient’s family history revealed similar dental anomalies in his father, paternal grandmother, paternal great-uncle and paternal great-grandmother (Fig. 2). Sequencing of the DSPP gene in the patient identified a novel likely pathogenic variant [c.3047del p.(Ser1016llefs*298)] that may explain the presented clinical case.
In cases of genetic dental anomalies, early diagnosis and referral to a paediatric dentist are crucial to prevent early deterioration and loss of teeth.2 This case report underscores the vital role of paediatricians in recognizing the early signs of the often-overlooked dental alterations that can affect a child’s physical and psychosocial well-being.
