Mechanical testing of four-unit implant-supported prostheses with extensive pink gingiva porcelain: The dentogingival prostheses proof of concept.
dentogingival prostheses
fatigue testing
fixed dental prostheses
implant supported
pink ceramic
Journal
Journal of esthetic and restorative dentistry : official publication of the American Academy of Esthetic Dentistry ... [et al.]
ISSN: 1708-8240
Titre abrégé: J Esthet Restor Dent
Pays: England
ID NLM: 101096515
Informations de publication
Date de publication:
06 2021
06 2021
Historique:
revised:
18
11
2020
received:
27
05
2020
accepted:
17
12
2020
pubmed:
11
1
2021
medline:
17
6
2021
entrez:
10
1
2021
Statut:
ppublish
Résumé
To investigate the probability of survival and failure modes of four-unit implant-supported porcelain fused to metal (PFM) dentogingival prostheses subjected to step-stress accelerated life testing (SSALT). Eighteen implant-supported PFM dentogingival prostheses with thin metallic infrastructures, which provided minimal ceramic support and improved esthetics were fabricated over external hexagonal connection UCLA abutments. SSALT was performed until specimen failure. Use level probability Weibull curve and reliability were calculated and plotted. Weibull modulus (m) and characteristic strength (η) were also calculated. Polarized light microscope and scanning electron microscope were used to characterize fractures. Failures were dictated by material strength rather than fatigue damage accumulation. The probability of survival for loads reaching 100 and 150 N in 100,000 cycles was 92 and 61%, respectively. No cracks or fractures were identified in the veneered porcelain, whereas abutment fixation screw fracture was the chief failure mode. Implant-supported PFM four-unit dentogingival prostheses with minimum metal framework dimensions presented favorable lifetime prediction under fatigue testing. Fractures were restricted to fixation screws. In-vitro fatigue testing and failure mode analyses evidenced favorable lifetime prediction for 4-unit implant-supported dentogingival prostheses with minimum metal frameworks. Abutment fixation screw fracture might be the most frequent clinical complication. Since this proof of concept has been tested in-vitro, further studies including different restorative materials, as well as long-term clinical trials are warranted.
Substances chimiques
Dental Implants
0
Dental Porcelain
12001-21-7
Zirconium
C6V6S92N3C
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Pagination
605-612Subventions
Organisme : Conselho Nacional de Desenvolvimento Científico e Tecnológico
ID : 304589/2017-9
Organisme : Conselho Nacional de Desenvolvimento Científico e Tecnológico
ID : 434487/2018-0
Organisme : Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
ID : Financial code 001
Organisme : Fundação de Amparo à Pesquisa do Estado de São Paulo
ID : 2012/19078-7
Organisme : Fundação de Amparo à Pesquisa do Estado de São Paulo
ID : 2016/18818-8
Organisme : Fundação de Amparo à Pesquisa do Estado de São Paulo
ID : 2018/03072-6
Organisme : Fundação de Amparo à Pesquisa do Estado de São Paulo
ID : 2019/00452-5
Organisme : Fundação de Amparo à Pesquisa do Estado de São Paulo
ID : 2019/08693-1
Informations de copyright
© 2021 Wiley Periodicals LLC.
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