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Summary
Mandibular tooth eruption was studied in children aged 3-14. Researchers found teeth erupt uniformly after crown completion, with a surge of 4-7 mm/year, and eruption rates vary significantly by age and tooth type.
Area of Science:
- Dentistry
- Orthodontics
- Human Anatomy
Background:
- Tooth eruption is a complex process crucial for oral function.
- Understanding mandibular tooth eruption patterns aids in diagnosing developmental abnormalities and planning orthodontic treatments.
Purpose of the Study:
- To radiographically analyze the eruption process of five mandibular teeth in children.
- To determine eruption rates and their correlation with root development and age.
Main Methods:
- Annual cephalograms of 54 boys and 41 girls aged 3-14 years were analyzed.
- Measurements focused on the eruption progression of specific mandibular teeth relative to the occlusal plane.
Main Results:
- Teeth exhibited a uniform eruption rate after crown completion, followed by a preocclusal surge of 4-7 mm/year.
- Eruption exceeded root growth by up to 4.6 mm/year, indicating eruption is not solely driven by root elongation.
- At age 14, the mandibular second molar erupted approximately three times faster than mandibular canines, suggesting occlusal plane rotation.
Conclusions:
- Mandibular tooth eruption follows distinct phases, with a notable surge post-crown completion.
- Eruption dynamics are complex, involving factors beyond root growth, and vary significantly among different teeth and age groups.
- Observed differential eruption rates may indicate changes in the occlusal plane relative to the mandibular baseline.