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  • Title: Chapter 4: Development Defects of Enamel and Dentine and Coronal Caries.
    Author: Manton DJ, Vieira AR.
    Journal: Monogr Oral Sci; 2023; 31():37-49. PubMed ID: 37364549.
    Abstract:
    The development of the human dentition is prone to disruption due to its delicate and complex nature - including variations in tooth number and anatomical form and in the characteristics of enamel, dentine, and cementum. This chapter will focus on developmental defects of dental enamel (DDE) and dentine (DDD), which can be associated with considerable treatment burden on an individual, often related to the change in dental hard tissue characteristics in those at increased caries risk. DDE are prevalent and can be related to genetic conditions such as amelogenesis imperfecta and environmental challenges such as direct physical trauma to the developing tooth or systemic insults during the different phases of amelogenesis. Phenotypical variability can be great, making diagnosis difficult in many cases. There are two major enamel defects - the quantitative defect of hypoplasia and the qualitative defect of hypomineralization. DDDs are less prevalent than DDEs, with two major DDD types: dentinogenesis imperfecta and dentine dysplasia. The main features of the DDDs are enamel fracture exposing the dentine and subsequent wear, with enlarged pulp spaces in some variants. The appearance may be affected, with bulbous teeth and grey-blue to brown opalescent colouring. With respect to dental caries, developmental defects of the teeth, in themselves, do not cause caries risk; however, they can change the manifestation of the disease due to creating niches for biofilm accumulation and thereby increasing cleaning difficulty and changing the physical and chemical characteristics of dental hard tissues and how they react to cariogenic challenges.
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