TABLE 2.

Reporting items for root and canal morphology in research studies

Section	Number	Checklist item	Listed on page number
Type of study	1	Experimental or clinical (cross-sectional or other); retrospective or prospective
Ethical approval	2	Approval from the ethical board committee
Ethnic group/population	3	Details on ethnic group or population
Tooth type (or roots)	4	Tooth (teeth) type included in the study and/or roots
Sample size calculation	5	Information on how the sample size was calculated before undertaking the research
Number of teeth (and/or roots)	6	The number of study samples should be reported.
Inclusion/Exclusion criteria	7	Information on how the teeth were selected – e.g. caries, resorption defects, restoration, root canal treated teeth, mature root apex, fractures, etc. Other factors related to imaging/ processing issues such as artifacts or samples loss because of chemicals (such as staining and clearing) have to be mentioned as criteria for exclusion.
Age	8	If applicable, the age range (or groups) of the study samples or patients should be reported.
Gender	9	If applicable, the gender of study samples should be reported.
Diagnostic device specifications and technique	10	Radiographic machine: This includes machine type, exposure settings Kv, mA, voxel size (if applicable), FOV (if applicable), angulation techniques, etc, as well as software programs used for analysis.
		Other diagnostic tools (such as staining and clearing, SEM, etc):
		The specifications and procedures should be mentioned in details.
		For all, calibration of the machine (if applicable) should be reported.
Qualitative analysis	11	Such as root canal configurations, evaluation of root canal shapes.
Quantitative analysis	12	Such as measuring volumes, areas diameters, distances, angles.
How the evaluation process was performed	13	Such as examining the coronal/axial/sagittal sections in 3D imaging, or observing the canal bifurcations in
		2D imaging under magnification, etc.
Endodontic procedures (if applicable)	14	Magnification, modification of the access cavity, exploration, negotiation with our without troughing and others (applicable for 2D clinical studies).
Classification used	15	Classification used for root canal configurations (with clear definition for orifice location and intercanal communications), root anomalies, accessory canals.
Calibration and reproducibility	16	How the examiners were calibrated. Methods for calibration must be described clearly. Intra-rater and/orinter-rater reliability tests must be mentioned.
Statistical analysis (if applicable)	17	The type of statistical method and software used for analysis should be reported.