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Long‐term survival analysis of standard‐length and short implants with multifunctional abutments
Author(s) -
Martinolli Matteo,
Bortolini Sergio,
Natali Alfredo,
Pereira Luciano José,
Castelo Paula Midori,
Rodrigues Garcia Renata Cunha Matheus,
Gonçalves Thais Marques Simek Vega
Publication year - 2019
Publication title -
journal of oral rehabilitation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.991
H-Index - 93
eISSN - 1365-2842
pISSN - 0305-182X
DOI - 10.1111/joor.12791
Subject(s) - abutment , implant , dentistry , medicine , prosthesis , dental prosthesis , maxilla , survival analysis , significant difference , survival rate , orthodontics , surgery , civil engineering , engineering
Summary Background Spherical shape and connecting bypass screw of the OT Equator abutment (Rhein83, Italy) provides several retentive possibilities, even in non‐parallel implants. Objective This study assessed the long‐term survival of standard‐length and short implants receiving this multifunctional abutment. Methods Partially, edentulous patients (44 males and 64 females) (mean age 58.2 ± 10.5 years) rehabilitated with a fixed implant‐supported prosthesis where the OT Equator abutments (Rhein83) were applied. Follow‐up evaluations were performed up to 5 years following prosthesis delivery. Kaplan‐Meier survival analysis and Cox regression analysis were used to determine whether the distribution of time to failure differed based on implant characteristics (length and region), adjusting for sex (α = 0.05). Results In total, 216 implants (5 × 8 mm, n = 126; 5 × 6 mm, n = 90) (Betwice, Mech & Human, Italy) were installed. The average follow‐up period was 25.3 months (±19.3 months). Eight failures occurred, with most observed before loading (n = 6). Cumulative survival rates (CSR) at implant and abutment levels were 94.3% and 97.1%, respectively. Regarding implant length, CSRs were 97.8% and 90.6% for short and standard‐length implants, respectively, with no difference between subgroups (logrank: χ 2 = 1.34, df = 1, P = 0.25). No significant difference was also found between implants of maxilla (CSR = 92.2%) and mandible (CSR = 95.5%; logrank: χ 2 = 0.08, df = 1, P = 0.78). Conclusion The OT Equator abutment (Rhein83) showed a stable clinical performance, with continuous and predictable survival.