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Compressive strength of two newly developed glass-ionomer materials for use with the Atraumatic Restorative Treatment (ART) approach in class II cavities.
Dent Mater. 2009 Apr; 25(4):551-6.DM

Abstract

OBJECTIVES

The null-hypotheses tested were that no difference in compressive strength of ART class II cavities exists between those restored with (1) glass-carbomer and a commonly used glass-ionomer; (2) KMEM and the commonly used glass-ionomer and; (3) glass-carbomer and KMEM.

METHODS

100 molar teeth, stratified by size, were randomly allocated to the four test groups. Large ART class II cavities were drilled and restored with Clearfil photoposterior (negative control), Fuji IX (positive control), Glass-carbomer and Ketac Molar Easymix (KMEM) (experimental groups). Half of the samples in each test group were 5000 times thermocycled between 5 degrees C and 55 degrees C, with a 30s dwell time in each bath and a transfer time of 10s. The restorations were statically tested at the marginal ridge until failure, using a rounded rectangular testing rod at crosshead speed of 1.0mm/min. ANOVA and Student's t-test were applied to test for differences between the dependent variable (compressive strength at the final breaking point) and the independent variables (thermocycling and restorative material).

RESULTS

Restorations of Clearfil photoposterior had a statistically significant higher mean compressive strength value at final breaking point than those of the three glass-ionomers tested (p=0.0001). No thermocycling effect was observed (p=0.19). ANOVA between the three glass-ionomer materials and mean compressive strength at final breaking point showed no statistically significant difference (p=0.09).

SIGNIFICANCE

Class II ART cavities restored with the newly launched Glass-carbomer and Ketac Molar Easymix were not significantly more fracture resistant than comparable restorations using the conventional glass-ionomer Fuji IX.

Authors+Show Affiliations

Department of Preventive and Restorative Dentistry, Radboud University Nijmegen Medical Centre, College of Dental Sciences, Nijmegen, The Netherlands.No affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Evaluation Study
Journal Article

Language

eng

PubMed ID

19211138

Citation

Koenraads, H, et al. "Compressive Strength of Two Newly Developed Glass-ionomer Materials for Use With the Atraumatic Restorative Treatment (ART) Approach in Class II Cavities." Dental Materials : Official Publication of the Academy of Dental Materials, vol. 25, no. 4, 2009, pp. 551-6.
Koenraads H, Van der Kroon G, Frencken JE. Compressive strength of two newly developed glass-ionomer materials for use with the Atraumatic Restorative Treatment (ART) approach in class II cavities. Dent Mater. 2009;25(4):551-6.
Koenraads, H., Van der Kroon, G., & Frencken, J. E. (2009). Compressive strength of two newly developed glass-ionomer materials for use with the Atraumatic Restorative Treatment (ART) approach in class II cavities. Dental Materials : Official Publication of the Academy of Dental Materials, 25(4), 551-6. https://doi.org/10.1016/j.dental.2008.12.008
Koenraads H, Van der Kroon G, Frencken JE. Compressive Strength of Two Newly Developed Glass-ionomer Materials for Use With the Atraumatic Restorative Treatment (ART) Approach in Class II Cavities. Dent Mater. 2009;25(4):551-6. PubMed PMID: 19211138.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Compressive strength of two newly developed glass-ionomer materials for use with the Atraumatic Restorative Treatment (ART) approach in class II cavities. AU - Koenraads,H, AU - Van der Kroon,G, AU - Frencken,J E, Y1 - 2009/02/10/ PY - 2008/07/10/received PY - 2008/12/12/accepted PY - 2009/2/13/entrez PY - 2009/2/13/pubmed PY - 2009/6/23/medline SP - 551 EP - 6 JF - Dental materials : official publication of the Academy of Dental Materials JO - Dent Mater VL - 25 IS - 4 N2 - OBJECTIVES: The null-hypotheses tested were that no difference in compressive strength of ART class II cavities exists between those restored with (1) glass-carbomer and a commonly used glass-ionomer; (2) KMEM and the commonly used glass-ionomer and; (3) glass-carbomer and KMEM. METHODS: 100 molar teeth, stratified by size, were randomly allocated to the four test groups. Large ART class II cavities were drilled and restored with Clearfil photoposterior (negative control), Fuji IX (positive control), Glass-carbomer and Ketac Molar Easymix (KMEM) (experimental groups). Half of the samples in each test group were 5000 times thermocycled between 5 degrees C and 55 degrees C, with a 30s dwell time in each bath and a transfer time of 10s. The restorations were statically tested at the marginal ridge until failure, using a rounded rectangular testing rod at crosshead speed of 1.0mm/min. ANOVA and Student's t-test were applied to test for differences between the dependent variable (compressive strength at the final breaking point) and the independent variables (thermocycling and restorative material). RESULTS: Restorations of Clearfil photoposterior had a statistically significant higher mean compressive strength value at final breaking point than those of the three glass-ionomers tested (p=0.0001). No thermocycling effect was observed (p=0.19). ANOVA between the three glass-ionomer materials and mean compressive strength at final breaking point showed no statistically significant difference (p=0.09). SIGNIFICANCE: Class II ART cavities restored with the newly launched Glass-carbomer and Ketac Molar Easymix were not significantly more fracture resistant than comparable restorations using the conventional glass-ionomer Fuji IX. SN - 1879-0097 UR - https://www.unboundmedicine.com/medline/citation/19211138/Compressive_strength_of_two_newly_developed_glass_ionomer_materials_for_use_with_the_Atraumatic_Restorative_Treatment__ART__approach_in_class_II_cavities_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0109-5641(09)00009-8 DB - PRIME DP - Unbound Medicine ER -