Condylar geometry variation is associated with ENPP1 variant in a population of patients with dento-facial deformities

Publication date: Available online 8 March 2017
Source:Journal of Cranio-Maxillofacial Surgery
Author(s): Marion Constant, Romain Nicot, Alexandre R. Vieira, Gwenael Raoul, James J. Sciote, Joel Ferri
PurposeBone remodeling is essential in maintaining bone health. Considering that ENPP1 contributes to bone geometry and bone mineralization, the aim of our study was to analyze the association between single-nucleotide polymorphisms (SNPs) of ENPP1 and condylar remodeling.Materials and MethodsA total of 156 patients undergoing orthodontic and maxillofacial surgery treatment for correction of malocclusion were included in this prospective study. Saliva samples from all subjects were used for DNA extraction and genotyping. Four ENPP1 SNPs were selected and tested to determine whether specific allelic variants are correlated with condylar remodeling. The criteria of condylar remodeling chosen were the ratio between each side of condylar height or surface differences on a dental panoramic of each patient. A diagnostic threshold was set at 15% difference between both sides.ResultsThe ENPP1 SNP rs9373000 showed a statistically significant association with condylar height ratio > 15% (p=0.012). The GG genotype was found to be a protective factor against condylar height decrease (p=0.003).ConclusionThis study identifies the genetic variant rs9373000 as a potentially causal variant for mandibular condyle geometry variation for patients presenting with dento-facial deformities.



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