Fracture Resistances of Cast Metal and Ceramic Dowel and Core Restorations: A Pilot Study
Yalçın, Emine ; Çehreli, Murat C. ; Canay, Şenay
350 Main Street , Malden , MA 02148-5020 , USA , and PO Box 1354, 9600 Garsington Road , Oxford OX4 2XG , England . : Blackwell Science Ltd
Published 2005
350 Main Street , Malden , MA 02148-5020 , USA , and PO Box 1354, 9600 Garsington Road , Oxford OX4 2XG , England . : Blackwell Science Ltd
Published 2005
| ISSN: |
1532-849X
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| Source: |
Blackwell Publishing Journal Backfiles 1879-2005
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| Topics: |
Medicine
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| Notes: |
Purpose: The purpose of this study was to compare fracture strengths of teeth restored with cast metal and ceramic dowel and cores supporting all-ceramic crowns. Materials and Methods: Eighteen recently extracted teeth were randomly divided into 3 equal groups. Metal dowel and cores (MDC) were fabricated for 1 group using a base metal alloy, and served as the control. The other groups received In-Ceram Spinell® (ICS) and IPS Empress 2® (IPS) dowel and cores. IPS Empress 1 crowns were fabricated for all samples. Each tooth was subjected to a shear force at a crosshead speed of 2 mm/min on a universal testing machine until failure occurred. Results: The mean fracture strengths and standard deviations of MDC, ICS, and IPS restorations were 1101 N (361), 832 N (288), and 1137 N (367), respectively. The differences between groups were insignificant (p 〈 0.05). Fractures of the all-ceramic crowns were observed in the MDC group, whereas the failure of ceramic dowel and core restorations was associated with root fracture at the cervical region. Conclusions: Due to improved mechanical properties, In-Ceram Spinell® and IPS Empress 2® ceramic dowel and cores may be candidates for the restoration of endodontically treated anterior teeth.
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| Type of Medium: |
Electronic Resource
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| URL: |