Revisiting aetiological models of maxillary canine impaction and its association with non-syndromic hypodontia: a nested case-control study among French orthodontic patients

Key Points

• The research aims to explore the relationship between non-syndromic hypodontia and maxillary canine impaction, particularly in the context of skeletal malocclusion.
• Conducted as a nested case-control study among French orthodontic patients.
• Analyzed the severity of non-syndromic hypodontia and its relation to maxillary canine impaction.
• Examined individual missing-tooth patterns to assess their explanatory power for canine impaction.
• Severe non-syndromic hypodontia is a significant predictor of maxillary canine impaction.
• Individual missing-tooth patterns did not adequately explain the incidence of impaction.
• These findings challenge classical aetiological models of impaction.