Long-term outcomes following lateral alveolar ridge augmentation using a collagenated xenogeneic bone block: a monocenter, prospective single-arm clinical study

Objectives To assess the long-term clinical outcomes following lateral alveolar ridge augmentation using a collagenated xenogeneic bone block (CXBB) and staged implant placement. Material and methods A total of n = 9 patients (9 implants) were available for the analysis. Each subject had received lateral ridge augmentation using a size-adapted rigidly fixed CXBB and contour augmentation at single-tooth gaps. Implant placement was performed after 24 weeks of submerged healing. Clinical parameters (e.g., bleeding on probing (BOP), probing pocket depth (PD), mucosal recession (MR)) were recorded at 16 to 20 weeks after the cementation of the crown (baseline) and scheduled for 0.5 (visit 1 (V1)), 1.5 (V2), 2.5 (V3), 3.5 (V4), and 4.5 (V5) years after implant loading. Results Changes in clinical parameters commonly remained low throughout the entire observation period. Significant changes to baseline were merely noted for mean BOP scores at V4 (19.14 +/- 17.75%; n = 7; P = 0.029) and mean PD scores at V2 (0.78 +/- 0.98 mm; n = 9; P = 0.044) and V3 (1.33 +/- 1.05 mm; n = 9; P = 0.009), respectively. Conclusion CXBB was associated with high clinical implant success and survival rates on the long-term.

Automated summary

The study found that lateral alveolar ridge augmentation using CXBB and staged implant placement resulted in long-term clinical success with minimal changes in clinical parameters for most patients throughout the observation period.