Abstract
IntroductionThis study investigated the association of CD14 -260C>T and TLR4 +896A>G gene polymorphisms with post-treatment apical periodontitis in Brazilian individuals. MethodsThe study population consisted of 41 patients with post-treatment apical periodontitis and 42 individuals with root canal–treated teeth exhibiting healed/healing periradicular tissues (controls). All teeth had apical periodontitis lesions at the time of treatment, which was completed at least 1 year previously. Saliva was collected from the participants; DNA was extracted and used for CD14 and TLR4 genotyping using the polymerase chain reaction–restriction fragment length polymorphism approach and a real-time polymerase chain reaction TaqMan assay (Applied Biosystems, Foster City, CA), respectively. ResultsNo specific genotype or allele of the CD14 and TLR4 genes or any combination thereof was positively associated with post-treatment apical periodontitis (P > .05). ConclusionsData from the present study suggest that polymorphisms in the CD14 and TLR4 genes do not influence the response to endodontic treatment of teeth with apical periodontitis.
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