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An association between tooth agenesis and taurodontism has been suggested. To verify if tooth agenesis and taurodontism are associated within families and specific patterns of tooth agenesis, this study aims to compare the frequency of taurodontism in patients with nonsyndromic familial tooth agenesis, their first and second-degree relatives with complete permanent dentition and a control group of unrelated healthy individuals with complete permanent dentition.

Panoramic radiographs of patients with nonsyndromic familial tooth agenesis, their first and second-degree relatives and a control group of individuals with complete permanent dentition were examined. Taurodontism was assessed on permanent mandibular first molars. The difference in the frequency of taurodontism among the studied groups was tested with Fisher's Exact Test.

Seventeen families with …