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In vitro fracture resistance of teeth with dentin-bonded ceramic crowns and core build-ups.
Am J Dent. 2003 Sep; 16 Spec No:88A-96A.AJ

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).

Authors+Show Affiliations

Glasgow Dental School, Scotland.No affiliation info availableNo affiliation info available

Pub Type(s)

Clinical Trial
Journal Article
Randomized Controlled Trial

Language

eng

PubMed ID

14674507

Citation

Lang, Mark, et al. "In Vitro Fracture Resistance of Teeth With Dentin-bonded Ceramic Crowns and Core Build-ups." American Journal of Dentistry, vol. 16 Spec No, 2003, 88A-96A.
Lang M, McHugh S, Burke FJ. In vitro fracture resistance of teeth with dentin-bonded ceramic crowns and core build-ups. Am J Dent. 2003;16 Spec No:88A-96A.
Lang, M., McHugh, S., & 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 No, 88A-96A.
Lang M, McHugh S, Burke FJ. In Vitro Fracture Resistance of Teeth With Dentin-bonded Ceramic Crowns and Core Build-ups. Am J Dent. 2003;16 Spec No:88A-96A. PubMed PMID: 14674507.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - In vitro fracture resistance of teeth with dentin-bonded ceramic crowns and core build-ups. AU - Lang,Mark, AU - McHugh,Siobhan, AU - Burke,F J Trevor, PY - 2003/12/17/pubmed PY - 2004/2/6/medline PY - 2003/12/17/entrez SP - 88A EP - 96A JF - American journal of dentistry JO - Am J Dent VL - 16 Spec No N2 - 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). SN - 0894-8275 UR - https://www.unboundmedicine.com/medline/citation/14674507/In_vitro_fracture_resistance_of_teeth_with_dentin_bonded_ceramic_crowns_and_core_build_ups_ DB - PRIME DP - Unbound Medicine ER -