RT Journal Article
T1 Marginal Bone Changes at Bone-Level Implants With Narrow or Standard Diameter Abutments: 1-Year Results of a Randomised Controlled Trial
A1 Liñares, Antonio
A1 Maceiras Pombo, Lucía
A1 Nóvoa Garrido, Lourdes
A1 González, Alejandro
A1 Rodríguez, Borja
A1 Batalla Vázquez, Pilar
A1 Leira Feijóo, Yago
A1 Blanco Carrión, Juan
K1 Abutment
K1 Bone loss
K1 Implants
K1 Marginal bone levels
AB Aim: To evaluate changes in the peri-implant marginal bone level at implants restored with narrow or standard-diameter abut-ments after 12 months.Material & Methods: Twenty-eight partially edentulous patients were randomly allocated to two groups. The test group con-sisted of 14 patients restored with a 2.9 mm diameter abutment (21 implants), while the control group included 14 patients restoredwith a 4.1 mm diameter abutment (17 implants). The primary outcome variable was the radiographic change in the peri-implantmarginal bone level at 12 months, measured as the distance from the implant shoulder to the first bone-to-implant contact (fBIC).Secondary outcome variables included clinical peri-implant parameters, the papilla index, biological and mechanical complica-tions, patient-reported outcomes (PROs) and professional aesthetic assessment.Results: A per-protocol analysis was conducted on the 22 patients who completed all scheduled follow-up visits. At the patientlevel, the change in mean radiographic bone level from definitive prosthesis placement to 12 months showed a reduction in thedistance from the implant shoulder to the fBIC of 0.16 ± 0.31 mm in the test group and 0.21 ± 0.34 mm in the control group, withno statistically significant differences between the groups. No statistically significant differences were observed between the twogroups for any of the secondary outcomes.Conclusions: Considering the limitations of this study, no significant differences in peri-implant marginal bone levels were foundbetween bone-level implants restored with narrow and standard diameter abutments after 12-month follow-up. Additionally, nodifferences were observed in clinical variables, patient-reported outcomes, or complications.
PB Wiley
SN 0905-7161
YR 2025
FD 2025-07-31
LK https://hdl.handle.net/10347/43621
UL https://hdl.handle.net/10347/43621
LA eng
NO Liñares, A., Maceiras, L., Nóvoa, L., González, A., Rodríguez, B., Batalla, P., Leira, Y., & Blanco, J. (2025). Marginal Bone Changes at Bone-Level Implants With Narrow or Standard Diameter Abutments: 1-Year Results of a Randomised Controlled Trial. Clinical Oral Implants Research, 36(10), 1335–1345. 10.1111/clr.70005
NO This work was supported by Ticare, Mozo- Grau S.A., Valladolid, Spain.
DS Minerva
RD 30 abr 2026