We have had 60 to 80 ish bucks aged at lab with the cementum process over several years. We finally decided it wasnt as accurate as we thought and hoped it would be. We werent sending in known age deer so maybe they were right. We just really document a lot of bucks over the years and feel some we have a good idea on age. Then the lab says different, some younger and some older. Tooth wear is not accurate either. There doesnt appear to be a way to age them with much certainty. We watch them over years and talk among ourselves and give them our best estimate of age and thats what we go by.