Overlays or Ceramic Fragments for Tooth Restoration: An Analysis of Fracture Resistance
Matheus Coelho Bandéca, Adriana Santos Malheiros, Rudys Rodolfo de Jesus Tavarez, Leily Macedo Firoozmand, Mônica Barros Silva
Citation Information :
Bandéca MC, Malheiros AS, de Jesus Tavarez RR, Firoozmand LM, Silva MB. Overlays or Ceramic Fragments for Tooth Restoration: An Analysis of Fracture Resistance. J Contemp Dent Pract 2014; 15 (1):56-60.
The aim of this study was to evaluate the mode of fracture and resistance of partial ceramic restorations of posterior teeth.
Materials and methods
Thirty healthy upper premolars were selected and divided into three groups (n = 10): Group 1— control, healthy unrestored teeth, group 2—teeth restored with ceramic fragments; and group 3—teeth restored with ceramic overlays. The restorations were manufactured with feldspathic ceramic and cemented with RelyX ARC resin cement. After being stored in distilled water for 7 days, the teeth were subjected to axial compression mechanical testing with a universal testing machine. Force was applied to the long axis of the tooth at a speed of 0.5 mm/min until fracture. The data were analyzed with one-way ANOVA and Tukey's test (5%). The mode of fracture was scored according to the degree of involvement of the tooth structure and the type of restoration.
Results
A significant difference (p < 0.05) was showed between groups 2 (1155 N) and 3 (846.6 N), but there was no significant difference between group 1 and the other groups (1046 N), More extensive fractures were prevalent in the healthy teeth group (Group 1), which had no occlusal coverage; less severe fractures were found in groups 2 and 3.
Conclusion
We conclude that teeth restored with ceramic fragments may offer greater resistance to fractures compared to teeth that have overlay restorations.
How to cite this article
de Jesus Tavarez RR, Firoozmand LM, Silva MB, Malheiros AS, Bandéca MC. Overlays or Ceramic Fragments for Tooth Restoration: An Analysis of Fracture Resistance. J Contemp Dent Pract 2014;15(1):56-60.
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