Journal Published Online: 10 March 2004
Volume 49, Issue 3

Radiographic Survey of Third Molar Development in Relation to Chronological Age Among Japanese Juveniles



The aim of the present study was to establish Japanese reference material on the third molar development of Japanese juveniles for forensic application. Observations were performed on the orthopantomograms of 1282 Japanese patients between the ages of 14.0 and 24.0 years. Demirjian formation stages of the maxillary and mandibular third molars were recorded for chronological evaluation of wisdom teeth and applied for further statistical analysis. Statistically significant differences were noted between the upper and lower jaws and genders. Accordingly, males achieved root developmental grades earlier than females. We assessed the mean ages for all formation grades and predicted the probability that a Japanese juvenile would be older than the relevant ages of 14, 16, and 20 as defined by Japanese Juvenile Law. We determined the likelihood that a Japanese youth is older than the relevant age of 18 as defined by legislation in the United States.

Author Information

Arany, S
Akita University School of Medicine, Akita, Japan
Iino, M
Akita University School of Medicine, Akita, Japan
Yoshioka, N
Akita University School of Medicine, Akita, Japan
Pages: 5
Price: $25.00
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Stock #: JFS2003372
ISSN: 0022-1198
DOI: 10.1520/JFS2003372