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Related Experiment Videos

Changes in root length from early to mid-adulthood: resorption or apposition?

S E Bishara1, L Vonwald, J R Jakobsen

  • 1College of Dentistry, University of Iowa, Iowa City 52242-1001, USA.

American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics
|May 7, 1999
PubMed
Summary

Adult orthodontic treatment is common. This study found no significant changes in tooth root length between ages 25 and 45 in untreated individuals, offering assurance for dental professionals.

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Area of Science:

  • Dentistry
  • Orthodontics
  • Human Anatomy

Background:

  • Adults increasingly seek orthodontic treatment.
  • Understanding root length changes during maturation is crucial for effective treatment planning.

Purpose of the Study:

  • To longitudinally assess changes in tooth root length from early to mid-adulthood (ages 25-45).
  • To establish normative root length data in an untreated population.

Main Methods:

  • Longitudinal study of 26 subjects (12 males, 14 females) aged 25-45.
  • Measurement of 1664 tooth roots (incisors, canines, premolars, molars) from periapical radiographs.
  • Statistical analysis using paired and Student t tests (P ≤ .05).

Main Results:

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  • No statistically significant changes in root length were observed for any tooth type between ages 25 and 45.
  • No significant differences in root length changes were found between males and females.
  • No significant differences were noted between right and left sides.

    • Conclusions:

    • Tooth root length remains stable between early and mid-adulthood in untreated individuals.
    • These findings provide reassurance against systematic root shortening during this age range.
    • Essential data for orthodontists managing adult patients.