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The effects of two cavity preparation methods on the longevity of glass ionomer cement restorations: an evaluation after 12 months.
J Am Dent Assoc. 2002 Jun; 133(6):744-51; quiz 769.JA

Abstract

BACKGROUND

The authors undertook a study to evaluate the effect of two cavity preparation methods on the initial survival of two more-viscous glass ionomer cements, or GICs, placed in the occlusal surfaces of permanent molar teeth.

METHODS

Three dentists placed 149 restorations in 68 adult patients in a hospital clinic. They used either atraumatic restorative treatment, or ART, or conventional cavity preparation methods to place two encapsulated esthetic conventional GICs: Fuji IX GP (GC International Corp., Tokyo) and Ketac-Molar Aplicap (3M ESPE, Seefeld, Germany). For comparison, they used high-copper-content GK Amalgam Alloy (Advanced Technology & Materials Co. Ltd., Beijing) in conventional preparations. They evaluated the restorations using both direct and indirect observation methods.

RESULTS

Cavity preparations for which the authors used ART hand instruments took approximately twice as long to complete as did those for which they used conventional rotary instruments. After 12 months, no restorations had failed, but restorations comprising both GICs showed early losses of adjacent sealant material. Both GICs also showed relatively high restoration wear. At 12 months, the mean cumulative net occlusal wear for Fuji IX GP was 77 +/- 47 micrometers, and for Ketac-Molar 83 +/- 51 microm, without statistical significance (P > .05). Color matching improved significantly with time (P < .001), without significant differences in color between the two GICs by 12 months (P = .09). The amalgam alloy had minor surface tarnishing and marginal discrepancies increased with time (P < .00 1).

CONCLUSIONS

All of the occlusal restorations were rated as satisfactory after 12 months. The method of cavity preparation did not affect the restoration performance of the GICs. However, their deterioration requires long-term monitoring. Clinical Implications. The more viscous GICs appear initially suitable for restricted use in clinical practice when placed using either of two cavity preparation methods in the occlusal surfaces of permanent molar teeth in adults.

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Publisher Full Text

Authors+Show Affiliations

Yip KH
The University of British Columbia, Faculty of Dentistry, Vancouver, Canada.
Smales RJ
No affiliation info available
Gao W
No affiliation info available
Peng D
No affiliation info available

MeSH

AdolescentAdultAnalysis of VarianceDental Cavity PreparationDental Restoration WearDental Restoration, PermanentFemaleGlass Ionomer CementsHumansMaleMolarStatistics, Nonparametric

Pub Type(s)

Clinical Trial
Comparative Study
Controlled Clinical Trial
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

12085859

Citation

Yip, Kevin H K., et al. "The Effects of Two Cavity Preparation Methods On the Longevity of Glass Ionomer Cement Restorations: an Evaluation After 12 Months." Journal of the American Dental Association (1939), vol. 133, no. 6, 2002, pp. 744-51; quiz 769.
Yip KH, Smales RJ, Gao W, et al. The effects of two cavity preparation methods on the longevity of glass ionomer cement restorations: an evaluation after 12 months. J Am Dent Assoc. 2002;133(6):744-51; quiz 769.
Yip, K. H., Smales, R. J., Gao, W., & Peng, D. (2002). The effects of two cavity preparation methods on the longevity of glass ionomer cement restorations: an evaluation after 12 months. Journal of the American Dental Association (1939), 133(6), 744-51; quiz 769.
Yip KH, et al. The Effects of Two Cavity Preparation Methods On the Longevity of Glass Ionomer Cement Restorations: an Evaluation After 12 Months. J Am Dent Assoc. 2002;133(6):744-51; quiz 769. PubMed PMID: 12085859.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - The effects of two cavity preparation methods on the longevity of glass ionomer cement restorations: an evaluation after 12 months. AU - Yip,Kevin H K, AU - Smales,Roger J, AU - Gao,Wei, AU - Peng,Dong, PY - 2002/6/28/pubmed PY - 2002/12/12/medline PY - 2002/6/28/entrez SP - 744-51; quiz 769 JF - Journal of the American Dental Association (1939) JO - J Am Dent Assoc VL - 133 IS - 6 N2 - BACKGROUND: The authors undertook a study to evaluate the effect of two cavity preparation methods on the initial survival of two more-viscous glass ionomer cements, or GICs, placed in the occlusal surfaces of permanent molar teeth. METHODS: Three dentists placed 149 restorations in 68 adult patients in a hospital clinic. They used either atraumatic restorative treatment, or ART, or conventional cavity preparation methods to place two encapsulated esthetic conventional GICs: Fuji IX GP (GC International Corp., Tokyo) and Ketac-Molar Aplicap (3M ESPE, Seefeld, Germany). For comparison, they used high-copper-content GK Amalgam Alloy (Advanced Technology & Materials Co. Ltd., Beijing) in conventional preparations. They evaluated the restorations using both direct and indirect observation methods. RESULTS: Cavity preparations for which the authors used ART hand instruments took approximately twice as long to complete as did those for which they used conventional rotary instruments. After 12 months, no restorations had failed, but restorations comprising both GICs showed early losses of adjacent sealant material. Both GICs also showed relatively high restoration wear. At 12 months, the mean cumulative net occlusal wear for Fuji IX GP was 77 +/- 47 micrometers, and for Ketac-Molar 83 +/- 51 microm, without statistical significance (P > .05). Color matching improved significantly with time (P < .001), without significant differences in color between the two GICs by 12 months (P = .09). The amalgam alloy had minor surface tarnishing and marginal discrepancies increased with time (P < .00 1). CONCLUSIONS: All of the occlusal restorations were rated as satisfactory after 12 months. The method of cavity preparation did not affect the restoration performance of the GICs. However, their deterioration requires long-term monitoring. Clinical Implications. The more viscous GICs appear initially suitable for restricted use in clinical practice when placed using either of two cavity preparation methods in the occlusal surfaces of permanent molar teeth in adults. SN - 0002-8177 UR - https://www.unboundmedicine.com/medline/citation/12085859/The_effects_of_two_cavity_preparation_methods_on_the_longevity_of_glass_ionomer_cement_restorations:_an_evaluation_after_12_months_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0002-8177(14)63502-9 DB - PRIME DP - Unbound Medicine ER -