Original scientific paper

Rate of enamel formation and hypoplasia timing

Abdulla Al-Shorman
Mohammad Alrousan
Ali Khwaileh

Abstract

Linear Enamel Hypoplasia (LEH) is a decrease in enamel thickness resulting from a temporary disruption in enamel formation during times of dental development. To establish a statistical relationship between the timing of enamel formation and the length of the crown, the published data of Reid and Dean (2006) were statistically analyzed using SPSS. The results indicate that the relationship between the crown length and the days of enamel formation is nonlinear as proposed by previous studies but exponential taking the form of , where y is the time of enamel formation in days, a and b are constants, and x is the crown length. Based on this equation, the timing of hypoplasia can be estimated more accurately using x as the distance of hypoplasia from the cemento enamel junction (CEJ). This study introduces a new equation for estimating the period of stunt growth (number of days of a hypoplastic event) depending on the horizontal shift of the mathematical function that represents the above relationship. This period may classify the LEH either as caused by acute growth disruptions or chronic and prolonged ones.

Keywords

Linear Enamel Hypoplasia; Enamel Thickness; Dental Development

Hrčak ID:

124960

URI

https://hrcak.srce.hr/124960

Publication date:

15.6.2014.

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