Home About us Editorial board Ahead of print Current issue Search Archives Submit article Instructions Subscribe Contact Us Login 
An Official Publication of the Indian Association of Oral and Maxillofacial Pathologists

Year : 2021  |  Volume : 25  |  Issue : 3  |  Page : 554-555
Inter-observer agreement in the radiographic interpretation of Demirjian's developmental stages in the mandibular second and third molars – A comparative study

1 Department of Oral and Maxillofacial Pathology, Government Dental College and Hospital, Ahmedabad, India
2 Medical Officer, Health India Insurance TPA, Vadodara, Gujarat, India
3 Forensic Odontologist & Consultant Dental Surgeon, Kannur, Kerala, India
4 Scientific Officer, Sherlock Institute of Forensic Science, New Delhi, India
5 General Forensic Assistant, Delhi Police Crime Branch, New Delhi, India

Correspondence Address:
Jayasankar P Pillai
Department of Oral and Maxillofacial Pathology, Government Dental College and Hospital, Ahmedabad - 380 016, Gujarat
Login to access the Email id

Source of Support: None, Conflict of Interest: None

DOI: 10.4103/jomfp.jomfp_85_21

Rights and Permissions

Background: The developmental stages of the teeth in the radiographs are graded on an ordinal scale. The present study was conducted using 123 digital orthopantomograms from individuals in the age group of 5 to 22 years and to analyze and evaluate the inter-observer agreement in grading the developmental stages of second and third molars. Four observers with different levels of practical experience in age estimation participated in the study. The development stages of both the molars in the lower left quadrant (3rd quadrant) were assigned based on the Demirjian's 10 stage chart. The percentage agreement and Kappa statistics were used to test the agreement between the observers. The data of the observer 1 were used as the standard for the comparison. Results: There was 70.0%–75.6% agreement among the observers in staging second molar and 52%–68.3% for the third molars. There was an excellent agreement (k > 080) between observer 1 and observer 2 and a good agreement (k = 060–0.79) between observer 1 and the other two observers for both the molars. The Fleiss Kappa revealed moderate to a good overall agreement for both the molars (k = 0.51–0.66). The Freidman's test revealed a significant difference in the grading of third molars between all the raters (χ2 = 25.02, df 3, P < 0.001) and for the second molar the difference was not significant (χ2 = 3.89, df 3, P > 0.05). The stage-wise overall agreement was fair for Stage 3 in the second molar and Stage 9 and Stage 4 in the third molar. Conclusions: In conclusion, proper training in the radiographic interpretation of developmental stages may minimize the errors during the age estimation methods.

Print this article  Email this article

  Similar in PUBMED
    Search Pubmed for
    Search in Google Scholar for
  Related articles
   Citation Manager
  Access Statistics
   Reader Comments
   Email Alert *
   Add to My List *
 * Requires registration (Free)

 Article Access Statistics
    PDF Downloaded17    
    Comments [Add]    

Recommend this journal


Journal of Oral and Maxillofacial Pathology | Published by Wolters Kluwer - Medknow
Online since 15th Aug, 2007