Osseointegration of dental implants in 3D-printed synthetic onlay grafts customized according to bone metabolic activity in recipient site

Research output: Contribution to journalArticlepeer-review

Authors

  • Faleh Tamimi
  • Jesus Torres
  • Khadijeh Al-Abedalla
  • Enrique Lopez-Cabarcos
  • Mohammad H. Alkhraisat
  • Uwe Gbureck
  • Jake E. Barralet

Colleges, School and Institutes

External organisations

  • McGill University
  • Universidad Complutense de Madrid
  • University of Wurzburg

Abstract

Onlay grafts made of monolithic microporous monetite bioresorbable bioceramics have the capacity to conduct bone augmentation. However, there is heterogeneity in the graft behaviour invivo that seems to correlate with the host anatomy. In this study, we sought to investigate the metabolic activity of the regenerated bone in monolithic monetite onlays by using positron emission tomography-computed tomography (PET-CT) in rats. This information was used to optimize the design of monetite onlays with different macroporous architecture that were then fabricated using a 3D-printing technique. Invivo, bone augmentation was attempted with these customized onlays in rabbits. PET-CT findings demonstrated that bone metabolism in the calvarial bone showed higher activity in the inferior and lateral areas of the onlays. Histological observations revealed higher bone volume (up to 47%), less heterogeneity and more implant osseointegration (up to 38%) in the augmented bone with the customized monetite onlays. Our results demonstrated for the first time that it is possible to achieve osseointegration of dental implants in bone augmented with 3D-printed synthetic onlays. It was also observed that designing the macropore geometry according to the bone metabolic activity was a key parameter in increasing the volume of bone augmented within monetite onlays.

Details

Original languageEnglish
Pages (from-to)5436-5445
Number of pages10
JournalBiomaterials
Volume35
Issue number21
Early online date13 Apr 2014
Publication statusPublished - Jul 2014

Keywords

  • Bone graft, Calcium phosphate, Dental implant, Osseointegration, Porosity