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oai:recercat.cat:20.500.12328/51312025-11-08T13:32:29Zcom_2072_67741col_2072_484352

Long-Term Impact of 1-mm Versus 3-mm Definitive Abutments on Marginal Bone Loss and Peri-Implant Disease: A 7-Year Randomised Clinical Trial Muñoz, Marta PARDO PERL, GERMAN EZEQUIEL Vilarrasa, Javi Babiano Nodal, Alvaro Ruiz Magaz, Vanessa Nart, Jose Abutment height Bone level Dental implant Long-term studies Marginal bone level Peri-implant maintenance therapy Peri-implant status Peri-implantitis Altura del pilar Nivel ósea Implante dental Estudios a largo plazo Nivel ósea marginal Tratamiento de mantenimiento Periimplantario Estado periimplantario Periimplantitis Nivell ossi Implant dental Estudis a llarg termini Nivell ossi marginal Tractament de manteniment periimplantari Estat periimplantari Aim: To evaluate bone level changes in implants with 1-mm- or 3-mm-high abutments over a 7-year period and to investigate therole of abutment height upon peri-implant status.Materials and Methods: Two-piece implants were placed 1.5 mm subcrestally with either 1-mm (control) or 3-mm (test) highdefinitive abutments. Marginal bone level change from the first to seventh year was the primary outcome. Peri-implant statusand other patient and peri-implant clinical variables (smoking, peri-implant maintenance therapy compliance, interproximalhygiene, vertical soft tissue thickness and keratinised mucosa width) were also assessed.Results: After 7 years, 37 subjects (63 implants) were analysed: 17 subjects with 32 implants in the 1-mm abutmentgroup, and 20 subjects with 31 implants in the 3- mm abutment group. Significant differences in marginal bone level changes wereobserved at 7 years. The 3-mm abutment group showed smaller changes compared to the 1-mm abutment group at mesialsites (−0.27 ± 1.32 mm vs. −0.42 ± 0.50 mm, respectively) and distal sites (−0.33 ± 1.39 mm vs. −0.35 ± 0.38 mm), with both differ-ences being statistically significant (p < 0.001). In the control group, 18 implants (54.6%) presented peri-implant mucositis and 6implants (18.2%) showed peri-implantitis. In the test group, 23 implants (74.2%) presented peri-implant mucositis and 1 implant(3.2%) showed peri-implantitis. No statistically significant differences were found (p = 0.158).Conclusions: Subcrestally inserted implants with 3-mm definitive abutments experienced minimal bone loss over long-termfollow-up compared to 1-mm abutments. However, since the differences were not statistically significant, no conclusions couldbe drawn on the protective effect against peri-implantitis. 2025-11-08T13:32:29Z 2025-11-08T13:32:29Z 2025-11-08T13:32:29Z 2025-08-18 info:eu-repo/semantics/article Muños, Marta; Pardo, Germán; Vilarrasa, Javi[et al.]. Long-Term Impact of 1-mm Versus 3-mm Definitive Abutments on Marginal Bone Loss and Peri-Implant Disease: A 7-Year Randomised Clinical Trial. Journal of Clinical Periodontology, 2025, 52(11), páginas 1595-1604. Disponible en <https://onlinelibrary.wiley.com/doi/10.1111/jcpe.70009>. Fecha de acceso: 6 nov. 2025. DOI: 10.1111/jcpe.70009 0303-6979 http://hdl.handle.net/20.500.12328/5131 https://doi.org/10.1111/jcpe.70009 eng Journal of Clinical Periodontology 52;11 https://creativecommons.org/licenses/by-nc/4.0/ info:eu-repo/semantics/openAccess © 2025 The Author(s). Journal of Clinical Periodontology published by John Wiley & Sons Ltd. Wiley