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Tooth Anatomy

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Internal Lower Incisor Morphology revealed by Computerized Microtomography.

Carolina O Lima¹, Lorena Ta Magalhães², Marília F Marceliano-Alves¹

¹Universidade Federal do Rio de Janeiro, Departmento de Endodontia, Rio de Janeiro, Brasil.

Acta Odontologica Latinoamericana : AOL

|July 5, 2020

Summary

This summary is machine-generated.

Computerized microtomography revealed that most lower incisors have a single root canal. However, anatomical variations like lateral canals and apical deltas in lower incisors can complicate dental treatment.

Keywords:

X-ray microtomography computerized microtomography endodontics incisors

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Area of Science:

Dentistry
Endodontics
Oral Anatomy

Background:

Understanding the internal morphology of lower incisors is crucial for successful endodontic treatment.
Previous studies have used conventional methods, but advanced imaging offers higher resolution.
Anatomical variations can significantly impact treatment outcomes and predictability.

Purpose of the Study:

To evaluate the internal morphology of lower incisors using computerized microtomography (micro-CT).
To analyze 2D and 3D morphological parameters of root canals.
To identify the prevalence of different canal configurations and anatomical variations.

Main Methods:

Eighty-nine lower incisors were scanned using micro-CT.
Image reconstruction was performed with NRecon software.
2D (perimeter, length, circularity, diameter) and 3D (volume, surface area, SMI) parameters were analyzed using CTAn and CTVol software.

Main Results:

89.9% of canals were Type I (single canal).
Lateral canals were present in 5.6% and apical deltas in 1.1% of specimens.
Canal shapes varied from circular at the CEJ to oval near the apex.

Conclusions:

Lower incisors predominantly exhibit a single root canal system.
Anatomical variations, though less common, present significant challenges in endodontic therapy.
Micro-CT provides detailed insights into complex root canal anatomy, aiding in treatment planning.