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Root Surface Changes in Endodontically Treated Teeth following Orthodontic Movement.
Austyn C Grissom1, Benjamin E Cozad2, Scott R Makins1
1Department of Endodontics, The University of Texas Health Science Center at Houston School of Dentistry, Houston, Texas.
Journal of Endodontics
|August 14, 2022
Summary
Endodontically treated teeth (ETT) show significantly less root resorption after orthodontic tooth movement (OTM) compared to vital pulp teeth (VPT). This suggests ETT may be more resistant to OTM-induced external root resorption.
Area of Science:
- Orthodontics
- Endodontics
- Dental Imaging
Background:
- Orthodontic tooth movement (OTM) can cause external root resorption, often considered unavoidable.
- Endodontically treated teeth (ETT) and vital pulp teeth (VPT) may respond differently to OTM-induced root resorption.
Purpose of the Study:
- To compare the changes in surface area and volume of ETT versus VPT after OTM.
- To determine if endodontic treatment influences susceptibility to root resorption during OTM.
Main Methods:
- A retrospective analysis of 76 teeth (38 ETT, 38 VPT) undergoing OTM.
- Cone-beam computed tomographic (CBCT) imaging was used at baseline (T1) and post-OTM (T2).
- Tooth surface area and volume were calculated using 3D mesh models derived from CBCT data.
Main Results:
- VPT exhibited significantly greater average changes in surface area (19.95 mm² vs 13.01 mm²) and volume (32.44 mm³ vs 22.48 mm³) compared to ETT.
- Percent changes in surface area (3.38% vs 2.09%) and volume (4.10% vs 2.62%) were also significantly higher in VPT.
- Statistical analysis confirmed these differences (P < .05).
Conclusions:
- Endodontically treated teeth demonstrate reduced susceptibility to external root resorption following orthodontic tooth movement.
- The findings suggest that ETT may offer a protective effect against OTM-induced root structure loss compared to vital teeth.
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