How does occlusal wear inform age and diet reconstruction?

• A. Wear only correlates with tooth color.
• B. Wear patterns reflect dietary habits and age progression; heavier wear generally indicates older age and certain dietary practices.
• C. Wear has no diagnostic value for age.
• D. Wear is primarily determined by genetics and not diet.

Answer: (B)

Occlusal wear on the chewing surfaces accumulates with use and carries information about both age and diet. As people chew over years, enamel gradually wears away, forming defined wear facets and flattening cusps. The amount and pattern of that wear depend largely on the foods people habitually chew. Abrasive, gritty, or very fibrous diets tend to produce more and faster wear through attrition and abrasion, while softer, refined diets produce less wear.

Because wear builds up over time, heavier or more advanced wear often corresponds to longer periods of mastication and, therefore, an older age at death or later life stage, especially when considered alongside dental health and restorative history. However, there’s substantial individual variation due to genetics, enamel strength, parafunctional grinding, dental work, and cultural practices, so wear is best used as a rough indicator rather than a precise age predictor. This combination of pattern and degree is what makes occlusal wear a useful clue for reconstructing both diet and relative age.

Color changes or wear alone don’t reliably inform age or diet, and wear isn’t determined solely by genetics, so those aspects don’t fit the concept as well.