There are various methods for the dental age assessment like the Nolla's, Demirjian's, Willem's etc. Nolla's method seems to be an easy method to assess the dental age of any given population. What are the merits and demerits of using Nolla's method for dental age assessment?
Dear Megha Gupta
pls check the link.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3482536/
http://jos.dent.nihon-u.ac.jp/journal/53/37.pdf
In fact, most studies showed underestimation of age associated with Nolla's dental age assessment method.
However, some studies found those differences significant while other studies considered it insignificant. That may be related to specific factors which may vary in different populations such as geographical factors, nutritional factors, heredity etc…..
Therefore, Nolla's dental age assessment shouldn’t be considered as an accurate method unless it is verified by a study with large sample size for specific population, but it can be used as an adjunct to other methods such as the radiological examination for calcification of maxillary and mandibular teeth.
Here are some studies and references:
1- Sachan K, Sharma VP, Tandon P: Reliability of Nolla's dental age assessment method for Lucknow population. Journal of Pediatric dentistry 2013;1:8-13
http://www.jpediatrdent.org/article.asp?issn=2321-6646;year=2013;volume=1;issue=1;spage=8;epage=13;aulast=Sachan
2- Nandlal B, Karthikeya P, Ravi S: Estimation of dental age by Nolla’s
method using orthopantomographs among rural free residential school children. Int J Med Res Health Sci. 2014;3(2):273-277
http://www.academia.edu/6759699/International_Journal_of_Medical_Research_and_Health_Sciences_ESTIMATION_OF_DENTAL_AGE_BY_NOLLAS_METHOD_USING_ORTHOPANTOMOGRAPHS_AMONG_RURAL_FREE_RESIDENTIAL_SCHOOL_CHILDREN
3- Gupta R, Rajvanshi H, Effendi H, Afridi S, Vuyyuru KK, Vijay B, Dhillon M: Dental age estimation by Demirjian’s and Nolla’s method in adolescents of Western Uttar Pradesh. Journal of Head and Neck Physicians and Surgeons 2015;3(1):50-56
http://jhnps.weebly.com/uploads/2/3/9/5/23957074/article_8_%281%29.pdf
Dear Dr Hakkoum
Thanks for the attached references. They will be useful for me.
Nolla's method is itself a radiologic examination to assess the dental age, which other method u consider as the most accurate for the dental age assessment ?
Reliability of Nolla’s dental age assessment method for Lucknow population Kiran Sachan1*, V. P. Sharma2,3, Pradeep Tandon
The article is clear and concludes the mx. And mn. Canine according to nolla classification can be effective tool for age estimation
Dr Bhavna , thanks for the information. Dr Nirmala, thank u for the attachments, they will be very useful.
Ans: The Nolla’s method allows the classification of dental development from stage one (1 - no sign of calcification with the presence of crept), to stage ten (10 - apical end completed). In this method of age estimation, the Intra oral Periapical radiograph of each tooth is assessed individually and compared with the stage of the Nolla table. The dental age calculated corresponds to the sum of the Nolla scores. This method has been found to be more precise in boys and more accurate than the Demirjian method in early and late childhood for both sexes. But this method could predict chronological age in adults. For girls, the Nolla method is significant up to late childhood.
A very few studies have investigated use of the Nolla’s method in different populations for age estimation and have concluded that the Nolla’s method is more accurate than Havikko and Demirjian methods and Nolla’s method constitutes a useful instrument for diagnosis and treatment planning.
Thank you Dr S Damle sir for the valuable information.
1. How if an OPG is used instead of an IOPA x-ray , to avoid any problems of fore-shortening/elongation
2. Rather than each tooth, can only the canines be used to assess the dental age of the patient?
dear Dr. Megha Gupta:
i do realize you are interested in Nolla's dental age assessment method however if you are thinking of using another method (just a suggestion) i will suggest using Dr Young-Ku Kim
occlusal wear method or at least give it a try.!
i have enclosed here two papers published by Dr Young-Ku Kim,. we have used this technique in our study concerning ages of individuals with abnormal hemorrhages we believe the study is accurate in estimating the age of an individual
best of luck
Dr.K.A.Galil.Professor of Dentistry
DDS.,D.Oral & Maxillofacial Surgery,PH.D,FAGD.,FADI.,Cert.Periodontist(Royal College of dental surgeons )
,Developer of The patented first App in Oral Histology for i Pad,i Phone ,i Pod Touch
visit the web site
https://itunes.apple.com/us/app/dgohe+/id1015383607?mt=8
and down load a free demo ,look at the bottom of the page .
see Dr.Galil listed as #17 on 51 first researchers
http://www.uwo.ca/research/51_firsts/
https://www.uwo.ca/research/_img/about/Publications/51%20Firsts%20English.pdf
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