A customized 3D-printed histological microgrinder for the study of metallic endoprostheses

Use of histology is the key when evaluation of bone and soft tissue integration of any implanted metallic prosthesis is required. This relies on the ability to prepare very thin sections by grinding down resin embedded samples. Manual grinding has historically been used with variable success, and thus, a number of commercial microgrinders have been previously marketed, however, at a significant cost. The following describes a practical method to 3D print and build a microgrinder construct retrofitted to a metallurgic wheel grinder/polisher previously available. The design files are also supplied, which allow one to implement customized modifications for virtually all types of wheel grinders/polishers circumventing the need to procure highly costly appliances. Recommendations are included on how to safely and reproducibly prepare microscopic sections using the described construct.