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Mesial migration effect on root morphology of mandibular third molars
A Altuğ Biçakçi1, Oral Sökücü, Hasan Babacan
1Department of Orthodontics, Cumhuriyet University, Faculty of Dentistry, Sivas, Turkey. abicakci@cumhuriyet.edu.tr
The Angle Orthodontist
|October 13, 2006
Summary
Mandibular third molars migrate mesially after early first molar extraction, resulting in less root curvature. This finding is significant for understanding tooth movement and root development.
Area of Science:
- Dentistry
- Orthodontics
- Oral Surgery
Background:
- Early mandibular first molar extraction can influence the eruption and position of adjacent teeth.
- Understanding the impact of extraction space closure on mandibular third molar development is crucial.
Purpose of the Study:
- To investigate the relationship between forward migration of mandibular third molars and their root curvature.
- To determine if unilateral mandibular first molar extraction affects mandibular third molar root angulation.
Main Methods:
- A cohort of 64 patients with unilateral mandibular first molar extraction before age 16 was studied.
- Panoramic radiographs were used to measure root angles of mandibular third molars on both extraction and non-extraction sides.
- Paired sample t-tests analyzed differences in root angulation between sides.
Main Results:
- Mandibular third molars exhibited approximately 8 degrees more vertical root angulation on the extraction side compared to the non-extraction side.
- Both mesial and distal roots showed statistically significant differences in verticality.
- Mesial migration of the mandibular third molar was associated with reduced root curvature.
Conclusions:
- Mesial tooth migration of mandibular third molars leads to a reduction in root curvature.
- Early first molar extraction influences mandibular third molar root morphology and angulation.
