Marginal changes at bone‐level implants supporting fixed screw‐retained partial implant prostheses with or without intermediate standardised abutments: 1‐year results of a randomised controlled clinical trial

Abstract

AbstractObjectiveTo compare marginal changes at bone‐level implants restored with screw‐retained implant prosthesis with or without intermediate standardised abutments, after 1 year of follow‐up.Materials and MethodsThirty‐six partially edentulous patients received 72 implants. Each patient received 2 implants and a 2‐ to 4‐unit screw‐retained implant‐prosthesis. The test group received implants consisting of a screw‐retained prosthesis connected directly to the implant shoulder, while the prostheses in the control group were connected through a 3‐mm standardised intermediate abutment. Clinical and radiological data were recorded at baseline and at 3, 6 and 12 months in follow‐up visits.ResultsAt 12 months, the marginal bone loss was 0.17 ± 0.24 mm for the test group (19 patients) and 0.09 ± 0.15 mm for the control group (17 patients), with no statistically significant differences (p > .05). The mean probing pocket depth was 2.96 mm ± 0.46 for the test group and 2.86 ± 0.62 mm for the control group. The test and control groups showed bleeding on probing levels of 18.86 ± 14.12% and 13.73 ± 17.66%, respectively. All patients scored below 25% on the plaque index levels.ConclusionsRestoration of bone‐level implants with fixed screw‐retained partial prostheses with or without intermediate abutments presented similar radiographic and clinical outcomes after 1 year.