Objectives:
Zirconia having different physical and optical properties is obtained
after the application of different sintering parameters. This study aims to investigate structural variations
after administering different sintering protocols and to evaluate the effect of
different surface treatments on shear bond strength.
Materials and Methods: Eighty translucent zirconia specimens (7x3 mm)
were divided into two different sintering groups (1480 0C for 180
min; 1510 0C for 30 min), then divided into four subgroups according
to surface treatments: control, sandblasted, Er-YAG, and Nd-YAG (n:10). One specimen from each group was analyzed with XRD and
one from each subgroup was analyzed with SEM. Ceramics (5x3 mm) were fired onto
the zirconia for shear bond strength test using universal testing machine and
the failure mode was determined by using stereomicroscope. Translucency
and contrast ratio were measured by using spectrophotometer, and biaxial
flexural strength test performed by employing universal testing machine on
specimens with a diameter (15x1,3 mm) from each sintering group (n:10). Data was analyzed by using
two-way ANOVA and Bonferroni Post hoc tests (P<.05).
Results: The short
sintering group showed higher biaxial flexural strength (943.87±48.69 MPa). The
highest surface roughness values were obtained in short sintering groups and
within the groups Nd-YAG application was found the most effective method
(4.11±0.28 Ra). The highest bond strength value was obtained in sandblasted
short time sintered group (29.71±2.52 MPa). The translucency and contrast ratio
showed no significant difference.
Conclusion: Although a physically stronger zirconia is
obtained by short sintering process, long-term sintered zirconia forms a more
durable bond strength with ceramics. Sandblasting improve the ceramic-zirconia
bond strength may have more benefits than the use of Er-YAG, and Nd-YAG lasers.
DIS-172
Cumhuriyet University
DIS-172
Birincil Dil | İngilizce |
---|---|
Konular | Sağlık Kurumları Yönetimi |
Bölüm | Original Research Articles |
Yazarlar | |
Proje Numarası | DIS-172 |
Yayımlanma Tarihi | 29 Aralık 2019 |
Gönderilme Tarihi | 27 Haziran 2019 |
Yayımlandığı Sayı | Yıl 2019 |
Cumhuriyet Dental Journal (Cumhuriyet Dent J, CDJ) is the official publication of Cumhuriyet University Faculty of Dentistry. CDJ is an international journal dedicated to the latest advancement of dentistry. The aim of this journal is to provide a platform for scientists and academicians all over the world to promote, share, and discuss various new issues and developments in different areas of dentistry. First issue of the Journal of Cumhuriyet University Faculty of Dentistry was published in 1998. In 2010, journal's name was changed as Cumhuriyet Dental Journal. Journal’s publication language is English.
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