BACKGROUND AND AIM: Infraocclusion, a disorder of tooth eruption, can often be found with more than one different
variation in a child. The objective of this study was to assess the prevalence and severity of infraocclusion and to
investigate the selected dental variations associated with infraocclusion in the West Mediterranean region of Turkey.
METHODS: The sample consisted of 3,228 children aged 7-11 years. The prevalence and severity of infraocclusion and
presence of other dental variations (tooth agenesis, supernumerary teeth (ST), dens invaginatus, and taurodontism) were
determined by the examination of panoramic radiographies. The development degree of the corresponding permanent
teeth was determined using the Nolla and Haavikko method. For statistical testing, the chi-square test was used to
compare the data in SPSS software.
RESULTS: Infraocclusion was defined in 3.25% of the examined primary molars. There was no statistically significant
difference in the prevalence of infraocclusion between girls (n = 51) and boys (n = 73) or between the right and left
sides (P > 0.05). It was found that about half of the affected patients had two impacted molars. Infraocclusion had
mainly affected the first mandibular molar. A dental variation was also found in addition to infraocclusion in 50.8% of
the patients. It was observed that primary molars without successors had more severe infraocclusion. No difference in
terms of tooth development was detected (P > 0.05).
CONCLUSION: Given the results of the present study, it was seen that half of the children with infraoccluded primary
molar had additional dental variations. Therefore, all children in the mixed and primary dentition must be examined
carefully for the infraocclusion of primary molars and accompanying dental variations. Early diagnosis and treatment
may prevent the development of complications, so that the condition can be appropriately managed