Sheep mandibles were scavenged from animals sacrificed at the completion of other studies following approved guidelines set by South Australia Pathology/Animal Ethics Committee (#ST25/12). The collected specimens included fourteen mandibles at two-tooth age, ten mandibles each at the four-tooth and six-tooth age, and seventeen mandibles at the mature age. The teeth at each developmental stage were examined using radiographs; CT scans, direct measurements, and histology.