Volume Fraction and Location of Voids and Gaps in Ultraconservative Restorations by X-ray Computed Micro-tomography

Overview

Journal Dent Res J (Isfahan)

Specialty Dentistry

Date 2016 Jan 14

PMID 26759587

Citations 1

Authors

Panagiotis Lagouvardos

Nick Nikolinakos

Constantine Oulis

Affiliations

Soon will be listed here.

Abstract

Background: Volume fraction (Vf) and location of internal voids and gaps in relation to material type and cavity dimensions in ultraconservative restorations were investigated in this study.

Materials And Methods: Forty-eight round cavities of 1.3 mm mean diameter and 2.6 mm mean depth were made on buccal and lingual surfaces of recently extracted human teeth. These were filled and thermocycled with two low viscosity composites (AeliteFlo LV [AF], PermaFlo [PF]), one high viscosity composite (Aelite aesthetic enamel [AA]) and one glass-ionomer (GCFuji IX GP). X-ray microtomography, following a specific procedure, was applied to all cavities before and after their restoration, using SkyScan-1072 microtomographer. Vf percent (Vf%) and location of voids and gaps were recorded and analysed statistically at a = 0.05. Kruskal-Wallis nonparametric analysis of variance, post-hoc analysis, Mann-Whitney test, Spearman's correlation analysis were used to analyze data.

Results: Cavities filled with AF and PF showed significantly lower Vf % of voids and gaps than all other restorations (P < 0.05). Only for the cavities filled with AA, cavity width and depth was significantly correlated with Vf % (P < 0.05). 50-75% of the filled cavities contained internal voids regardless of the restorative material (P > 0.05). The proportion of cavities with gaps at the bottom and side walls was lower in those filled with AF and PF (P < 0.05).

Conclusion: Cavities filled with low viscosity composites presented the lowest amount of internal voids and gaps. Glass-ionomer and high viscosity composite restorative materials showed the highest amount of interfacial gaps. Only in the high viscosity composite restorations the amount of voids and gaps correlated with the cavity depth, width and volume.

Citing Articles

Quantification of porosity in composite resins delivered by injectable syringes using X-ray microtomography.

Nilsen B, Mouhat M, Jokstad A Biomater Investig Dent. 2021; 7(1):86-95.

PMID: 33458692 PMC: 7782768. DOI: 10.1080/26415275.2020.1784013.

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