Abreu, S., Silva, L.F., Teixeira, S., Marques, H.C., Ramalhete, N. and Antunes, H. 2012. Evaluation Of The Performance Of Three Spacers. Acta Médica Portuguesa. 25, 1 (May 2012), 4–9. DOI:https://doi.org/10.20344/amp.2.