Assessment of Reliability of Demirjian Formula for Age Estimation Using Mandibular Third Molar in a Sample of Egyptian Population Using CBT: a Cross-sectional Study

NCT06232135 | Completed

• 1 other identifier: yaraprotocol1893
• Study Type: observational
• Target: 145
• Locations: 1 country
• Sites: 1

Brief Summary

Aim: To assess the reliability of age estimation in Egyptian adolescents and young adults using mandibular third molar stages of calcification, based on the Demirjian method, on CBCT scans. Methodology: 145 CBCT scans for the mandibular left posterior region were collected from the database of the maxillofacial radiology clinic of the faculty of dentistry at Cairo University. The scans were then analyzed using Planmeca Romexis software viewer version 4.6.2.R. The mandibular left 3rd molars were evaluated to determine the calcification stage of each of them based on the modified Demirjian method. According to the assigned calcification stage, the dental age was determined, and then the mean ± SD for each calcification stage was calculated and compared to the chronological age in terms of mean difference and mean absolute error. The correlation between the calculation stage and chronological age was analyzed, and the probability for an individual to be 18 years of age or older in each stage was calculated.

Conditions

Estimated Age Calculated Based on Modified Demirjian Method Using Mandibular Left Third Molar

Keywords

Demirjian; CBCT; age estimation

Outcome Measures

Primary Outcomes (1)

• accuracy of the modified Demirjian method

  mean difference between estimated age and chronological age

  2 weeks

Study Arms (2)

Females

CBCT scans of the females enrolled in the study are to be analyzed for the assignment of a calcification stage to their lower left third molar according to the modified Demirjian method.

Other: CBCT scan

Males

CBCT scans of the males enrolled in the study are to be analyzed for the assignment of a calcification stage to their lower left third molar according to the modified Demirjian method.

Other: CBCT scan

Interventions

CBCT scan OTHER

analysis of the CBCT scan to assign a calcification stage to the subject's lower left third molar and accordingly calculate the estimated age of each subject

Females; Males

Eligibility Criteria

• Age: 9 Years - 24 Years
• Gender Eligibility Details: self-representation of gender identity.
• Healthy Volunteers: No
• Age Groups: Child (0-17), Adult (18-64)
• Sampling Method: Non-Probability Sample

Study Population

CBCT scans from the database available at the department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Cairo University.

You may qualify if:

• Egyptian patients with age ranges from 9 to 24 years.
• Complete dental records of radiographs, including the date of birth, date of radiography, and sex.
• Scans showing complete mandibular arch.

You may not qualify if:

• Patients below 9 years and above 24 years.
• Any pathology or fractures associated with mandibular third molar.
• Scans with severe metallic artifacts.
• Congenitally absent 3rd molars.

Sponsors & Collaborators

• Cairo University: lead

Study Sites (1)

faculty of dentistry - Cairo university

Cairo, Cairo Governorate, 3753450, Egypt

Location

Study Design

• Study Type: observational
• Observational Model: ECOLOGIC OR COMMUNITY
• Time Perspective: CROSS SECTIONAL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Master degree student

Study Record Dates

• First Submitted: January 20, 2024
• First Posted: January 30, 2024
• Study Start: September 1, 2021
• Primary Completion: June 15, 2022
• Study Completion: June 15, 2022
• Last Updated: January 30, 2024

Record last verified: 2024-01

Locations

EG (1)