-
Tytuł:
-
In Vitro Static and Fatigue Behavior of Ceramic Occlusal Veneers Using CAD/CAM.
-
Autorzy:
-
Al-Haj Husain N; University of Zurich.
Sonderegger S; University of Bern.
Özcan M; University of Zurich.
Brägger U; University of Bern.
Joda T; University of Basal.
-
Źródło:
-
The European journal of prosthodontics and restorative dentistry [Eur J Prosthodont Restor Dent] 2020 Aug 31; Vol. 28 (3), pp. 113-120. Date of Electronic Publication: 2020 Aug 31.
-
Typ publikacji:
-
Journal Article
-
Język:
-
English
-
Imprint Name(s):
-
Publication: 2012- : Lowestoft : Stephen Hancocks Ltd. in association with Dennis Barber Ltd.
Original Publication: Larkfield, Aylesford, Kent, UK : Mosby-Year Book Europe Ltd., c1992-
-
MeSH Terms:
-
Dental Porcelain*
Dental Veneers*
Ceramics ; Computer-Aided Design ; Dental Stress Analysis ; Materials Testing ; Zirconium
-
Contributed Indexing:
-
Keywords: CAD/CAM; Fracture Resistance; Lithium Disilicate; Mechanical Loading; Occlusal Veneers; Zirconia
-
Substance Nomenclature:
-
12001-21-7 (Dental Porcelain)
C6V6S92N3C (Zirconium)
-
Entry Date(s):
-
Date Created: 20200505 Date Completed: 20200904 Latest Revision: 20200904
-
Update Code:
-
20240105
-
DOI:
-
10.1922/EJPRD_2018Husain08
-
PMID:
-
32363813
-
To evaluate fracture resistance of occlusal veneers made of glass-ceramic and zirconia with and without fatigue. Occlusal overlays (N=80; n=10 per group) were milled out of CAD/CAM materials, namely: a)LD:Lithium disilicate glass ceramic, b)LDS:Lithium-disilicate- strengthened aluminosilicate glass ceramic, c)ZLT:Zirconium dioxide ceramic and d)ZMT:Zirconium dioxide ceramic. The overlays were cemented on polymeric duplicates, randomly distributed to aging or non-aging conditions and loaded until fracture. Ultimate catastrophic failure strength(Fmax) and Initial crack formation load(Finitial) values were analysed using two-way ANOVA. For Finitial, material type and aging and their interaction resulted in significant values (p =⟨0.001). Finitial mean±SD values ranged from ZMTa (593 N ±205 N) to LDSb (118 N ±42 N). As for Fmax, the material type significantly affected the outcome (p⟨0.001), while aging type did not show an influence (p=0.795). The non-aged Fmax specimens values presented were: LDSa (877 N ±253 N)⟨LDa (2029 N ±412 N)⟨ZLTa (2049 N ±379 N)⟨ZMTa (2144 N ±333 N), LDSa being significantly lower (p⟨0.001). The aged Fmax values were: LDSb (1313 N ±599 N)⟨ ZLTb (1715 N ±453 N)⟨ZMTb (2018 N ±300 N)⟨LDb (2134 N ±289 N). LDS yielded significantly lower Fmax values without and non-significant less favourable results with aging. The mechanical properties following aging and lack of additional firing makes LDS an interesting restorative material for clinical application.
(Copyright© 2020 Dennis Barber Ltd.)
