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Marginal bone loss at implants with different surface characteristics ‐ A 20‐year follow‐up of a randomized controlled clinical trial
Author(s) -
Donati Mauro,
Ekestubbe Annika,
Lindhe Jan,
Wennström Jan L.
Publication year - 2018
Publication title -
clinical oral implants research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.407
H-Index - 161
eISSN - 1600-0501
pISSN - 0905-7161
DOI - 10.1111/clr.13145
Subject(s) - medicine , implant , dentistry , randomization , randomized controlled trial , radiological weapon , surgery
Objective This report is a 20‐year follow‐up of a randomized controlled clinical trial evaluating the potential long‐term effect of a modified implant surface on the preservation of the peri‐implant marginal bone level. Material & Methods In each of 51 patients and for each fixed partial denture (FPD), by randomization at least one implant installed had a non‐modified turned surface and one a modified and roughened surface (TiOblast ® ). Clinical and radiological examinations were performed at various follow‐up intervals. Primary outcome variables were peri‐implant marginal bone level change from time of loading and proportion of implants with no bone loss at 20 years. Multilevel analysis followed by nonparametric and Pearson's Chi‐Square tests were applied for statistical analysis. Results At the 20‐year follow‐up, 25 patients carrying 64 implants were available for evaluation. Turned and TiOblast implants presented with a mean bone level change from the time of FDP delivery amounting to −0.41 mm (95% CI −0.84/0.02) and −0.83 mm (95% CI −1.38/−0.28) respectively (inter‐group comparison p > .05). 47% of the Turned and 34% TiOblast implants ( p > .05) showed no bone loss. All but one of these implants were free of bacterial plaque and inflammation as well as presented with probing pocket depths ≤5 mm at both the 5‐ and 20‐year follow‐up examinations. Conclusion It is suggested that a moderate increase of implant surface roughness has no beneficial effect on long‐term preservation of the peri‐implant marginal bone level.