SynthesisClinical oral investigations2025
The genetic basis of tooth impaction: a systematic review.
Synthesis in Clinical oral investigations, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
2 citing papers in PubMed.
- Article
- MSX1 and PAX9 Polymorphisms and Their Association With Lateral Incisor Morphology in Patients With Maxillary Canine Impaction.Medical science monitor : international medical journal of experimental and clinical research · 2026Observational
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
4 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
objectivesThe aim of this review was to identify genes and genetic traits that cause tooth impaction by systematically collecting the best available evidence. MATERIALS AND
methodsRelevant literature was searched on 10 databases up to March 2025 and search criteria were formulated using the PECOS and PRISMA guidelines. The eligibility criteria included case-control, cohort and cross-sectional observational studies, which examined human subjects regardless of age or sex and focused on the analysis of genes, alleles, gene variants, non-coding RNAs, or other genetic factors that cause tooth impaction. The risk of bias of eligible studies was evaluated using the Joanna Briggs Institute (JBI) Critical Appraisal Checklists.
resultsOverall, 15 studies met the inclusion criteria. Several important genes were highlighted and mutations and polymorphism in these genes showed an increase in the risk of tooth impaction. Specifically, MSX1 rs12532, PAX9 rs4904210 and rs2073247, AXIN2 rs2240308, as well as MSX2 rs4868444 and ARNT2 rs140220410 revealed significant association with canine, third molar or general tooth impaction. Synergistic effects of some gene genotypes were also addressed. The third molar impaction was associated with specific long non-coding RNAs of the corresponding dental follicles, and with the individual's blood group. According to the JBI checklist, the studies showed high methodological quality.
conclusionThree key genes, namely MSX1, PAX9 and AXIN2, appear to have an important role in tooth impaction. Moreover, limited evidence suggests that long non-coding RNAs and the type of individual's blood group could be potential biomarkers of tooth impaction. However, the contradictory results from the included studies reduce the certainty of any solid conclusions. Additional studies with large samples involving advanced methodologies for genetic testing are essential to pinpoint the underlying genetic factors of tooth impaction. CLINICAL RELEVANCE: Understanding the genetic factors and specific mutations behind tooth impaction, may enhance early diagnosis, prevention of impaction and treatment.
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