Having reached five years follow-up, the first randomized controlled trial (RCT)1 comparing outcomes of edentulous maxilla patients rehabilitated with the All-on-4® treatment concept or “All-on-6” implants shows no differences in survival (p=0.246), bone remodeling (p=0.12) nor in biological or technical complications (p>0.10).
All 40 patients were treated using guided surgery and an immediate loading protocol. No failures of the cross-arch fixed dental prostheses occurred and all technical complications were easily resolved chairside. Although not significant, implant survival outcomes were better in patients undergoing the All-on-4® procedure, and bone remodeling was very similar in both groups (1.71±0.42 mm All-on-4® vs. 1.51±0.36 mm).
This RCT provides strong evidence that both approaches represent a predictable treatment option for completely edentulous patients.
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