Thesis Type: Dental Specialty
Institution Of The Thesis: Inonu University, Diş Hekimliği Fakültesi, Klinik Bilimler, Turkey
Approval Date: 2019
Thesis Language: Turkish
Student: İREM SALGINCI
Consultant: Güler Yıldırım AvcuAbstract:
Aim: The aim of this thesis is to evaluate the bond strength of three aesthetic abutment
materials at different angulations with ti-base and monolithic zirconia crowns.
Materials and Method: PVDF abutments were obtained prefabrically, zirconia and
PEEK copings were manufactured by CAD/CAM system (n=12). Bonding surfaces of
the copings and ti-bases were sandblasted with alumina and then metal primer was
applied. Self-cure cement was used for cementation of copings to the ti-base.
Monolithic zirconia crowns were produced for each abutment (n=72). The bonding
surface of the crowns was air-abraded and crowns were cemented with self-adhesive
cement. Data were analyzed by Kruskal-Wallis and Mann-Whitney-U tests after tensile
bond strength tests.
Results: No significant difference was found between abutments at 0° angulation, in the
bond strength of abutment-crown interface, in comparison between groups (p>0.05).
Regarding 15° angulated abutments, the highest bond strength value was found in
zirconia abutments (p>0.05). In the evaluation of bond strength of abutments to crowns,
bond strength of 15° angulated abutments of zirconia group were higher than PEEK and
PVDF abutments (p<0.05). In the evaluation of bond strength of abutments to ti-base,
PVDF abutments was highest and the PEEK abutments were the lowest (p <0.05).
Conclusion: Bond strength of monolithic zirconia crowns were lower than the
restorations used in routine clinical practice. While bond strength of zirconia and PVDF
abutments were acceptable, further studies are necessary to improve the bond strength
of PEEK abutments.