The Calvarial Injection Assay.

This chapter describes the calvarial injection method, whereby the effect of a substance on bone is tested by subcutaneous injection over the calvarium of a mouse. This assay allows testing of the effect of substances on both bone resorption and bone formation in a relatively simple in vivo model. The analysis is carried out by histological means, usually in glycolmethacrylate-embedded tissue, allowing for histochemical analysis and for a variety of different histological staining methods which are also described in detail.