ROLE OF THIRD MOLARS IN DEVELOPMENT OF TEETH CROWDING WITHIN THE MANDIBLE: ANALYSIS OF AVAILABLE EVIDENCES BASED ON SYSTEMATIc REVIEws DATA
DOI:
https://doi.org/10.32689/2663-0672-2023-5-14Keywords:
third molars, teeth overcrowding, dental pathology, systematic review.Abstract
Introduction. Taking into account the differences in the results of individual scientific publications regarding the potential relationships between the parameters of the presence, position and eruption direction of third molars and the probability of the frontal teeth crowding development within the mandible, it seems reasonable to conduct an analysis of the evidences formulated on the basis of data from systematic reviews, as aggregates of processed results of previously conducted studies according to appropriately formulated and strictly observed analysis criteria. Objective. To assess the impact of third molars on the risk of teeth crowding within the mandible according to data accumulated in available systematic reviews. Methods. The primary search of targeted scientific sources related to the stated purpose of the study was conducted within the PubMed database (https://pubmed.ncbi.nlm.nih.gov/) using the keywords “tooth crowding” and “third molar” and involving “Systematic review” and “Meta-Analysis” filters. Results. Evidences for a causal relationship between the impact of third molars and the development of dental crowding, reflected in systematic reviews, are insufficient. Third molars are not the main reason for the development of crowding of the frontal teeth within the mandible, but only one of the factors that take part in the formation of this pathology; at the same time, the clinical severity of crowded teeth signs within the mandible are potentially more pronounced among patients with present third molars. Conclusions. Although the results of some systematic reviews and meta-analyses indicate a potential relationship between the likelihood of dental crowding developing and the presence, position, eruption direction, and stage of development of the lower third molars, the evidences for such relationship are of low quality, and such relationship cannot be categorized as causal. In the available systematic reviews, the influence of third molars on the development of tooth crowding recurrence after the orthodontic treatment was not proven, which excludes the need to implement the procedure of their extraction as mandatory specifically for the purpose of preventing the development of orthodontic disorder.
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