Inferior alveolar nerve block and third-molar agenesis: a retrospective clinical study
Jerry Swee1, Anthony R Silvestri, Matthew D Finkelman
1Department of Pediatric Dentistry, School of Dental Medicine, Tufts University, Boston, MA 02111, USA.
Journal of the American Dental Association (1939)
|April 2, 2013
Summary
Inferior alveolar nerve blocks (IANBs) administered to children may prevent third molar development. This study found a higher incidence of missing third molars in areas that received IANBs.
Area of Science:
- Pediatric Dentistry
- Oral Surgery
- Radiology
Background:
- Inferior alveolar nerve blocks (IANBs) are common dental procedures for children.
- The needle path for IANBs is near developing third molars.
- A potential link between IANBs and absent third molars was investigated.
Purpose of the Study:
- To determine if inferior alveolar nerve blocks (IANBs) are associated with the absence of third molars in children.
- To analyze the impact of IANBs on third molar development.
Main Methods:
- Panoramic radiographs of 439 children aged 7+ were analyzed for third molar follicles.
- A statistical comparison was made between children with and without a history of IANBs.
- Generalized estimating equations were used for analysis.
Main Results:
- A statistically significant higher incidence of missing third molar follicles was observed in quadrants with a history of IANBs.
- Mandibular quadrants receiving IANBs showed a greater likelihood of lacking third molars.
Conclusions:
- IANBs given during early tooth development may inhibit third molar formation.
- Dentists might unintentionally impede third molar development through IANBs.
- Further research is recommended to confirm these clinical findings.
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