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Related Experiment Video

Updated: Apr 3, 2026

Studying Orthodontic Tooth Movement in Mice

Studying Orthodontic Tooth Movement in Mice

Published on: August 2, 2024

A proposal for using contralateral teeth to provide well-balanced experimental groups for endodontic studies.

J Xu¹, M Y Shao², H Y Pan³

¹State Key Laboratory of Oral Diseases, Department of Preventive Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu, China.

International Endodontic Journal

|September 19, 2015

Summary

Developing anatomically balanced experimental groups for endodontic studies requires a strict screening protocol. Few contralateral teeth pairs exhibit sufficient anatomical symmetry for such research.

Keywords:

CBCT anatomical symmetry balanced baseline contralateral premolars screening protocol

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Area of Science:

Dentistry
Endodontics
Dental Anatomy

Background:

Selecting anatomically matched teeth is crucial for reliable endodontic research.
Contralateral teeth are often used to minimize anatomical variability.

Purpose of the Study:

To establish a rigorous protocol for screening extracted teeth.
To ensure the creation of anatomically balanced experimental groups for endodontic studies.

Main Methods:

Sixty pairs of contralateral premolars were collected and evaluated for anatomical features.
Screening involved assessing apical foramen maturity, canal type, curvature, and tooth length.
Cone-beam computed tomography (CBCT) was utilized for a final, strict screening.

Main Results:

Initial screenings revealed significant asymmetry in canal curvature and tooth length among contralateral pairs.
After multiple screening stages, only 21% of contralateral premolar pairs met the criteria for anatomical symmetry.
A rigorous protocol is essential due to the low yield of suitable contralateral teeth.

Conclusions:

A substantial proportion of contralateral teeth lack the necessary anatomical symmetry for balanced endodontic study groups.
Implementing a detailed and strict screening protocol is imperative for selecting appropriate teeth in endodontic research.