The most reliable criteria in Gustafson method of age estimation is -: (A) Attrition, (B) Secondary dentin deposition, (C) Transparency of root, (D) Cementum apposition
Answer is C. The canals in dentin become wide and are filled with mineral so that they become translucent gradually . It is not seen until thiy years of age. It is the most reliable criteria in Gustafsons method. Ref:Dr . Narayana Reddys Synopsis of Forensic Medicine & Toxicology 27th edition pg. 37.