Age estimation by palatal suture using modified Kamijo's method.

Area of Science:

• Forensic Anthropology
• Human Osteology
• Craniometry

Background:

• Palatal suture obliteration is a potential indicator for age estimation in skeletal remains.
• Existing methods, like Kamijo's (1949), require refinement for accurate application in modern populations.
• Understanding the correlation between palatal suture obliteration and chronological age is crucial for forensic science.

Purpose of the Study:

• To investigate the correlation between palatal suture obliteration and age in a modern Japanese population.
• To develop and validate a modified age estimation equation based on palatal suture obliteration.

Main Methods:

• Analysis of 195 Japanese skeletal remains (155 males, 40 females) with known age and sex.
• Measurement of palatal suture obliteration using a scoring system (0-4) across 14 sections.
• Regression analysis using Total Suture Score (TSS) to estimate age, with intra- and inter-observer reliability checks.

Main Results:

• A significant positive correlation was found between Total Suture Score (TSS) and age in males and the combined group (p < 0.001).
• The developed regression formula demonstrated a high regression coefficient (r=0.540) and a low standard error of estimation (13.54 years).
• Validation studies indicated an 80% accuracy rate for the age estimation formula.

Conclusions:

• A reliable age estimation regression formula using palatal suture obliteration has been established for the Japanese population.
• The modified Kamijo's method provides a valid tool for forensic age assessment in skeletal remains.
• Further validation across diverse populations is recommended to assess the broader applicability of the method.