Association between molar–incisor hypomineralisation and dental anomalies

Abstract

AbstractBackgroundCommon etiological factors have been reported in the development of molar–incisor hypomineralisation (MIH) and dental anomalies (DA).AimTo assess the association between MIH and DAs.DesignA cross‐sectional study was performed to evaluate the presence of MIH and other six DAs in a sample of 415 pretreatment records from patients aged 9–18 years. Statistical analyses were performed using the chi‐squared and Fisher's exact tests, and logistic regressions.ResultsThere was statistically significant association between the prevalence of DAs and MIH (CI: 1.43–2.43, φ‐coefficient: 0.204, PR: 1.87). Higher percentage of tooth agenesis (CI: 1.37–1.68, φ‐coefficient: 0.271, PR: 1.50), maxillary premolar agenesis (CI: 1.70–3.65, φ‐coefficient: 0.125, PR: 2.49), mandibular second premolar agenesis (CI: 1.68–3.16, φ‐coefficient: 0.172, PR: 2.30) and distoangulation of the mandibular second premolars (CI: 1.31–3.47, φ‐coefficient: 0.103, PR: 2.13) was observed among children who had MIH‐affected teeth. Individuals with MIH had a 2.95 times greater chance of having DAs (R2 = .153). The number of patients with DAs was higher when the first molar showed severe defects (OR = 4.47; R2 = .149).ConclusionThere is a weak association between MIH and DAs. Patients with severe MIH lesions have a slightly higher risk of presenting DAs.