In vitro fracture resistance of teeth with dentin-bonded ceramic crowns and core build-ups

Lang, M., McHugh, E.S. and Burke, F.J. (2003) In vitro fracture resistance of teeth with dentin-bonded ceramic crowns and core build-ups. American Journal of Dentistry, 16(Spec N), 88A -96A.

Abstract

PURPOSE: To assess the fracture strength of dentin-bonded crowns placed on cores of amalgam, resin composite and viscous glass-ionomer. METHODS: 40 sound maxillary premolar teeth were selected. These were mounted in acrylic resin in stainless steel molds. The palatal cusp of each tooth was removed in a standardized manner to simulate a core build-up preparation. Teeth were randomly divided into four groups, and each group was allocated a core material. For Group A, the core was pin-retained amalgam, for Group B the core was bonded amalgam, for Group C the core material was resin composite and for Group D the core material was high-viscosity glass-ionomer material. Cores were then constructed to the original tooth dimensions. A standardized crown preparation was made, impressions taken and an all-ceramic crown constructed in feldspathic porcelain. The crowns were luted in position using a dentin-bonding agent/dual cure resin-composite cement and the completed specimens subjected to compressive loading in a Universal Testing machine at 1 mm/minute. RESULTS: The mean forces to produce fracture of the crowns were 1.58 kN (+/- 0.41), 1.35 kN (+/- 0.44), 1.25 kN (+/- 0.24), and 1.12 kN (+/- 0.25) respectively for groups A, B, C and D. Statistical analysis by ANOVA indicated that the pinned amalgam group performed significantly better than the glass-ionomer group (P > 0.05).

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Burke, Prof Frederick
• Authors: Lang, M., McHugh, E.S., and Burke, F.J.
• Subjects: R Medicine > RK Dentistry
• College/School: College of Medical Veterinary and Life Sciences; College of Medical Veterinary and Life Sciences > School of Medicine, Dentistry & Nursing; College of Medical Veterinary and Life Sciences > School of Medicine, Dentistry & Nursing > Dental School
• Journal Name: American Journal of Dentistry
• ISSN: 0894-8275