Resumen de Surface characterization and in vivo evaluation of laser sintered and machined implants followed by resorbable-blasting media process: a study in sheep

Michelle Bowers, Daniel Yoo, Charles Marin, Luiz Gil, Nour Shabaka, Matt Goldstein, Malvin Janal, Nick Tovar, Ronaldo Hirata, Estevam A. Bonfante, Paulo G. Coelho

• Background: This study aimed to compare the histomorphometric and histological bone response to laser-sintered implants followed by resorbable-blasting media (RBM) process relative to standard machined/RBM surface treated implants.

  Material and Methods: Six male sheep (n=6) received 2 Ti-6Al-4V implants (1 per surface) in each side of the mandible for 6 weeks in vivo. The histomorphometric parameters bone-implant contact (BIC) and bone area fraction occupancy (BAFO) were evaluated.

  Results: Optical interferometry revealed higher Sa and Sq values for the laser-sintered/RBM surface in relation to standard/RBM implants. No significant differences in BIC were observed between the two groups (p>0.2), but significantly higher BAFO was observed for standard/RBM implants (p<0.01).

  Conclusions: The present study demonstrated that both surfaces were biocompatible and osseoconductive, and the combination of laser sintering and RBM has no advantage over the standard machined implants with subsequent RBM.