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Related Experiment Videos

Bone structure effect on root resorption.

Linda L Otis1, Justin Sung-Ho Hong, Orhan C Tuncay

  • 1Oral & Maxillofacial Radiology, School of Dental Medicine, University of Pennsylvania, 4001 Spruce Street, Philadelphia, PA 19104, USA. lotis@pobox.upenn.edu

Orthodontics & Craniofacial Research
|September 14, 2004
PubMed
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Alveolar bone density and shape do not significantly influence external apical root resorption during orthodontic treatment. Larger teeth showed more root resorption, but bone structure was not a contributing factor.

Area of Science:

  • Orthodontics
  • Dental Radiology
  • Periodontology

Background:

  • External apical root resorption (EARR) is a common consequence of orthodontic treatment.
  • The role of alveolar bone morphology and density in EARR etiology remains unclear.

Purpose of the Study:

  • This study investigated the potential association between alveolar bone characteristics and the incidence of EARR.

Main Methods:

  • Panoramic and cephalometric radiographs of 700 orthodontic patients were analyzed.
  • 22 patients with lower incisor EARR were selected for detailed analysis of bone density and morphology.
  • Measurements included root area, tooth length, alveolar bone dimensions, and trabecular bone fractal dimension.

Main Results:

Related Experiment Videos

  • Larger teeth and longer roots were associated with greater root resorption.
  • Dentoalveolar complex dimensions remained stable during tooth movement.
  • No significant correlation was found between alveolar bone density, cortical thickness, or fractal dimension and the extent of EARR.

Conclusions:

  • Alveolar bone density and morphology are not significant etiological factors in external apical root resorption.
  • Tooth size appears to be a more influential factor in EARR during orthodontic treatment.