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Related Concept Videos

Bone Remodeling01:40

Bone Remodeling

Bone remodeling is a continuous and balanced process of bone resorption by osteoclasts and bone formation by osteoblasts. In adults, it helps maintain bone mass and calcium homeostasis. While mechanical stress can stimulate turnover as part of the normal maintenance and reparative process, several hormones also regulate bone remodeling.
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Osteoclasts in Bone Remodeling

Osteoclasts are cells responsible for bone resorption and remodeling. They originate from hematopoietic progenitor cells present in the bone marrow. Numerous progenitor cells fuse to form multinucleated cells, each with 10-20 nuclei. A single osteoclast has a diameter of 150 to 200 µM. These cells have ruffled borders that break down the underlying bone tissue and release minerals such as calcium into the blood in bone resorption. Osteoclasts cling to bones with their ruffled edges during bone...
Teeth01:15

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The formation of teeth, also known as odontogenesis, is a complex process that begins in utero, around the sixth week of embryonic development. There are three stages to this process: the bud stage, the cap stage, and the bell stage.
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Tooth Anatomy01:21

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Related Experiment Video

Updated: Jun 22, 2026

Studying Orthodontic Tooth Movement in Mice
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Published on: August 2, 2024

Root resorption during orthodontic tooth movements.

C Ramanathan1, Z Hofman

  • 1Department of Orthodontics, Faculty Hospital in Hradec Králové, Charles University in Prague, Czech Republic. chaitra_ramanathan@yahoo.co.in

European Journal of Orthodontics
|June 16, 2009
PubMed
Summary
This summary is machine-generated.

The three-component arch technique in orthodontics may lead to greater maxillary incisor root resorption compared to basal or straightwire appliances, though differences were not statistically significant. Further research is needed to confirm these findings on orthodontic root resorption.

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Area of Science:

  • Orthodontics
  • Dental Biomechanics
  • Periodontology

Background:

  • Orthodontic treatment can cause root resorption, a common side effect.
  • Understanding factors influencing root resorption is crucial for patient safety.
  • Maxillary incisor root resorption is a significant concern in orthodontic treatment planning.

Purpose of the Study:

  • To compare the extent of maxillary incisor root resorption.
  • To evaluate three orthodontic techniques: basal intrusion arch, three-component arch, and straightwire appliance.
  • To determine if different orthodontic mechanics influence the rate of root resorption.

Main Methods:

  • Radiographic analysis of 49 subjects (mean age 14.5 years).
  • Measurements taken at two time points over 6 months.
  • Comparison of root resorption using ANOVA and Wilcoxon paired tests.

Main Results:

  • The three-component arch group showed slightly greater mean resorption (0.46 mm) than the basal arch (0.26 mm) and straightwire (0.25 mm) groups.
  • Statistical analysis (ANOVA) revealed no significant differences in root resorption among the three groups.
  • No significant root resorption was observed between the initial and final time points within groups.

Conclusions:

  • While the three-component arch technique showed a trend towards increased root resorption, the differences were not statistically significant.
  • No technique demonstrated a statistically significant difference in causing root resorption.
  • Further investigation is warranted to fully elucidate the relationship between orthodontic mechanics and incisor root resorption.