Reference : Aging of monolithic zirconia dental prostheses: Protocol for a 5-year prospective cli...
Scientific journals : Article
Life sciences : Biotechnology
Engineering, computing & technology : Materials science & engineering
Human health sciences : Dentistry & oral medicine
http://hdl.handle.net/2268/201503
Aging of monolithic zirconia dental prostheses: Protocol for a 5-year prospective clinical study using ex vivo analyses
English
KOENIG, Vinciane mailto [Centre Hospitalier Universitaire de Liège - CHU > > Service prothèse fixée >]
Wulfman, Claudine [Université Paris Descartes > > > >]
DERBANNE, Mathieu [> >]
DUPONT, Nathalie mailto [Centre Hospitalier Universitaire de Liège - CHU > > Service prothèse fixée >]
LE GOFF, Stéphane [> >]
TANG, Mie-Leng [> >]
SEIDEL, Laurence mailto [Centre Hospitalier Universitaire de Liège - CHU > > Service des informations médico économiques (SIME) >]
DEWAEL, Thibaut mailto [Centre Hospitalier Universitaire de Liège - CHU > > Service prothèse fixée >]
VAN HEUSDEN, Alain mailto [Centre Hospitalier Universitaire de Liège - CHU > > Service prothèse fixée >]
MAINJOT, Amélie mailto [Centre Hospitalier Universitaire de Liège - CHU > > Service prothèse fixée >]
15-Dec-2016
Contemporary Clinical Trials Communication
4
25-32
Yes (verified by ORBi)
International
2451-8654
[en] Dental prosthesis ; Zirconia ; Low thermal degradation ; Computer-aided design/computer-aided ; manufacturing ; Wear ; Raman spectroscopy
[en] Background: Recent introduction of computer-aided design/computer-aided manufacturing (CAD/CAM)
monolithic zirconia dental prostheses raises the issue of material low thermal degradation (LTD), a wellknown
problem with zirconia hip prostheses. This phenomenon could be accentuated by masticatory
mechanical stress. Until now zirconia LTD process has only been studied in vitro. This work introduces an
original protocol to evaluate LTD process of monolithic zirconia prostheses in the oral environment and
to study their general clinical behavior, notably in terms of wear.
Methods/design: 101 posterior monolithic zirconia tooth elements (molars and premolars) are included
in a 5-year prospective clinical trial. On each element, several areas between 1 and 2 mm2 (6 on molars, 4
on premolars) are determined on restoration surface: areas submitted or non-submitted to mastication
mechanical stress, glazed or non-glazed. Before prosthesis placement, ex vivo analyses regarding LTD and
wear are performed using Raman spectroscopy, SEM imagery and 3D laser profilometry. After placement,
restorations are clinically evaluated following criteria of the World Dental Federation (FDI), complemented
by the analysis of fracture clinical risk factors. Two independent examiners perform the
evaluations. Clinical evaluation and ex vivo analyses are carried out after 6 months and then each year for
up to 5 years.
Discussion: For clinicians and patients, the results of this trial will justify the use of monolithic zirconia
restorations in dental practice. For researchers, the originality of a clinical study including ex vivo analyses
of material aging will provide important data regarding zirconia properties.
http://hdl.handle.net/2268/201503

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