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Full-arch implant-retained CAD/CAM zirconia frameworks

by: Jim Mack

Clinical performance of centrally manufactured full-arch, screw-retained zirconia frameworks presented

Full-arch implant-retained CAD/CAM zirconia frameworks

The clinical performance of centrally manufactured full-arch, screw-retained zirconia frameworks (NobelProcera Implant Bridge Zirconia, Nobel Biocare) with cemented full-contour crowns at a mean follow-up of 38.5 months was recently presented at the 21st Annual Meeting of the EAO.1

Results of this single-center retrospective analysis showed a cumulative prosthetic survival rate of 100% with all zirconia frameworks intact and all prosthetic restorations stable and in good function.

The definitive restorations are comprised of full-arch zirconia frameworks (NobelProcera Implant Bridge Zirconia) with adhesively-luted, single-unit, lithium-disilicate crowns (e.max®, Ivoclar Vivadent®, Schaan, Liechtenstein). Problems were limited to the crowns with one minor cohesive chip-off fracture of the veneering ceramic and two fractures of the lithium-disilicate cores with an 88.5% success rate. While veneering factures were positively correlated with external connection (P = 0.041), neither number of supporting implants, nor arch, nor cantilever had an adverse effect on the clinical outcome. Centrally manufactured full-arch screw-retained zirconia frameworks with cemented full-contour crowns were proven to be a valid treatment option with a high medium-term survival rate and good clinical success.

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