Which prefix might be used to describe a condition related to increased bone density?

The prefix "osteo-" relates specifically to bones. When discussing conditions involving bone density, this prefix is particularly relevant. For instance, osteoporosis indicates a condition of reduced bone density, while the opposite condition, characterized by increased bone density, would appropriately utilize the prefix "osteo-" to denote its association with bone.

In contexts of medical terminology, "hyper-" means excessive or increased, but it does not specifically convey a relationship to bones. In contrast, "gastro-" pertains to the stomach and "chole-" relates to bile or gallbladder functions, which are not relevant to bone density at all. Therefore, "osteo-" is the most suitable prefix for describing conditions involving bones, including those associated with increased density.