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Failure Modes and Survival of Anterior Crowns Supported by Narrow Implant Systems
Joint Authors
Bergamo, Edmara T. P.
de Araújo-Júnior, Everardo N. S.
Lopes, Adolfo C. O.
Zahoui, Abbas
Benalcázar Jalkh, Ernesto B.
Coelho, Paulo G.
Bonfante, Estevam A.
Source
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-09-08
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
The reduced hardware design of narrow implants increases the risk of fracture not only of the implant itself but also of the prosthetic constituents.
Hence, the current study is aimed at estimating the probability of survival of anterior crowns supported by different narrow implant systems.
Three different narrow implant systems of internal conical connections were evaluated (Ø3.5×10 mm): (i) Active (Nobel Biocare), (ii) Epikut (S.I.N.
Implant System), and (iii) BLX (Straumann).
Abutments were torqued to the implants, and standardized maxillary incisor crowns were cemented.
The assemblies were subjected to step-stress accelerated life testing (SSALT) in water through load application of 30 degrees off-axis lingually at the incisal edge of the crowns using a flat tungsten carbide indenter until fracture or suspension.
The use level probability Weibull curves and reliability for completion of a mission of 100,000 cycles at 80 N and 120 N were calculated and plotted.
Weibull modulus and characteristic strength were also calculated and plotted.
Fractured samples were analyzed in a stereomicroscope.
The beta (β) values were 1.6 (0.9-3.1) and 1.4 (0.9-2.2) for BLX and Active implants, respectively, and 0.5 (0.3-0.8) for the Epikut implant, indicating that failures were mainly associated with fatigue damage accumulation in the formers, but more likely associated with material strength in the latter.
All narrow implant systems showed high probability of survival (≥95%, CI: 85-100%) at 80 and 120 N, without significant difference between them.
Weibull modulus ranged from 6 to 14.
The characteristic strength of Active, Epikut, and BLX was 271 (260-282) N, 216 (205-228) N, and 275 (264-285) N, respectively.
The failure mode predominantly involved abutment and/or abutment screw fracture, whereas no narrow implant was fractured.
Therefore, all narrow implant systems exhibited a high probability of survival for anterior physiologic masticatory forces, and failures were restricted to abutment and abutment screw.
American Psychological Association (APA)
Bergamo, Edmara T. P.& de Araújo-Júnior, Everardo N. S.& Lopes, Adolfo C. O.& Coelho, Paulo G.& Zahoui, Abbas& Benalcázar Jalkh, Ernesto B.…[et al.]. 2020. Failure Modes and Survival of Anterior Crowns Supported by Narrow Implant Systems. BioMed Research International،Vol. 2020, no. 2020, pp.1-11.
https://search.emarefa.net/detail/BIM-1131417
Modern Language Association (MLA)
Bergamo, Edmara T. P.…[et al.]. Failure Modes and Survival of Anterior Crowns Supported by Narrow Implant Systems. BioMed Research International No. 2020 (2020), pp.1-11.
https://search.emarefa.net/detail/BIM-1131417
American Medical Association (AMA)
Bergamo, Edmara T. P.& de Araújo-Júnior, Everardo N. S.& Lopes, Adolfo C. O.& Coelho, Paulo G.& Zahoui, Abbas& Benalcázar Jalkh, Ernesto B.…[et al.]. Failure Modes and Survival of Anterior Crowns Supported by Narrow Implant Systems. BioMed Research International. 2020. Vol. 2020, no. 2020, pp.1-11.
https://search.emarefa.net/detail/BIM-1131417
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1131417