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Published on: December 20, 2024
Effect of luting cements on the compressive strength of Turkom-Cera all-ceramic copings
Bandar M A Al-Makramani1, Abdul A A Razak, Mohamed I Abu-Hassan
1Department of Conservative Dentistry of the Faculty of Dentistry at the University of Malaya in Kuala Lumpur, Malaysia. makramani@yahoo.com
Aim:
The objective of this study is to investigate the effect of different luting agents on the fracture strength of Turkom-Cera all-ceramic copings.
Methods And Materials:
Standardized metal dies were duplicated from a prepared maxillary first premolar tooth using non-precious metal alloy (Wiron 99). Thirty Turkom-Cera copings of 0.6 mm thickness were then fabricated. Three types of luting agents were used: zinc phosphate cement (Elite), glass-ionomer cement (Fuji I), and a dual-cured composite resin cement (Panavia F). Ten copings were cemented with each type. All copings were cemented to their respective dies according to manufacturer's instructions and received a static load of 5 kg for ten minutes. After 24 hours of storage in distilled water at 37 degrees C, the copings were vertically loaded until fracture using an Instron Universal Testing Machine at a crosshead speed of 1 mm/minute. The mode of fracture was then determined.
Results:
Statistical analysis carried out using analysis of variance (ANOVA) revealed significant differences in the compressive strength between the three groups (P<0.001). The mean fracture strength (in Newtons) of Turkom-Cera copings cemented with Elite, Fuji I, and Panavia F were 1537.4 N, 1294.4 N, and 2183.6 N, respectively.
Conclusions:
Luting agents have an influence on the fracture resistance of Turkom-Cera copings.
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