Abstract
ObjectivesTo assess the long-term clinical outcomes following lateral alveolar ridge augmentation using a collagenated xenogeneic bone block (CXBB) and staged implant placement.Material and methodsA 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.ResultsChanges 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.ConclusionCXBB was associated with high clinical implant success and survival rates on the long-term.
Highlights
Staged lateral bone augmentation is a commonly used clinical procedure to allow for implant placement in an ideal prosthetic position to ensure function and aesthetics [1]
collagenated xenogeneic bone block (CXBB) was associated with high clinical implant success and survival rates on the long-term
Study design and participants This study reports on the 4.5-year clinical outcomes of a monocenter, prospective single-arm clinical study, which aimed at evaluating the safety and efficacy of CXBB for lateral alveolar ridge augmentation and two-stage implant placement
Summary
Staged lateral bone augmentation is a commonly used clinical procedure to allow for implant placement in an ideal prosthetic position to ensure function and aesthetics [1]. Different materials including autogenous bone, xenografts, allografts, alloplasts, or combination of these have been investigated and proven to be associated with an overall weighted mean clinical bone width gain of. The incidence of complications was high, with wound dehiscences and premature membrane/graft exposures being among the most frequent events (i.e., 5–54%). This was less frequently (i.e., 7–13%) associated with wound infections and a loss of the graft material. Harvesting of autogenous bone grafts was frequently (9–66%) associated with a transient paresthesia [2]. It was recommended that patient morbidity should play a crucial component when selecting treatment options [1]
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