20. Müeller WD, Gross U, Fritz T, Voigt C, Fischer P, Berger G, et al. Evaluation of the interface between bone and titanium surfaces being blasted by aluminium oxide or bioceramic particles Clin Oral Implants Res. 2003;14(3):349-56. doi: 10.1034/j.1600-0501.2003.00791.x.