Prevalence and complications of trauma to the primary dentition in a subpopulation of Spanish children in southern Europe.

Background: During the first years of life, when children begin to walk and socialize, they are particularly vulnerable to traumatic injuries to the primary teeth; indeed, after dental caries, such injuries are the second most frequent cause of pediatric dental consultation. Nonetheless, the reported prevalence of trauma to the primary teeth varies depending on the literature source, type of injury, the patient's age, and the most common associated complications.

Aim: To analyze new epidemiological data and complications associated with traumatic injuries to the primary teeth of Spanish children.

Interleukin 1 receptor antagonist (IL1RN) genetic variations condition post-orthodontic external root resorption in endodontically-treated teeth.

External apical root resorption (EARR) is a frequent iatrogenic problem following orthodontic treatment in endodontically-treated teeth, about which the literature reports substantial variability in post-orthodontic treatment EARR responses. The main focus of the present study is to clarify whether variants in the interleukin-1 receptor antagonist gene coding for the IL-1ra protein have a positive/negative influence on EARR of endodontically-treated teeth. Ninety-three orthodontic patients were genetically screened for a single nucleotide polymorphism (SNP:rs419598) in the IL1 cluster.