A modified dilatometer for continuous recording of volumetric polymerization shrinkage of composite restorative materials

Gee, A.J. de; Davidson, C.L.; Smith, A. C.

doi:10.1016/0300-5712(81)90033-6

Cited by 93 publications

(6 citation statements)

References 7 publications

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“…One of the first methods used to measure the polymerization volumetric shrinkage was the mercury dilatometer [60] (Figure 5). This equipment evaluates the volume change of the mercury in a reservoir surrounding the resin-composite specimen trough a thin column and the results are registered according to the amplified linear height variations of this column.…”

Section: Polymerization Shrinkage: Methods For Evaluationmentioning

confidence: 99%

Shrinkage Stresses Generated during Resin-Composite Applications: A Review

Schneider¹,

Cavalcante²,

Silikas³

2010

Journal of Dental Biomechanics

159

126

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Many developments have been made in the field of resin composites for dental applications. However, the manifestation of shrinkage due to the polymerization process continues to be a major problem. The material's shrinkage, associated with dynamic development of elastic modulus, creates stresses within the material and its interface with the tooth structure. As a consequence, marginal failure and subsequent secondary caries, marginal staining, restoration displacement, tooth fracture, and/or post-operative sensitivity are clinical drawbacks of resin-composite applications. The aim of the current paper is to present an overview about the shrinkage stresses created during resin-composite applications, consequences, and advances. The paper is based on results of many researches that are available in the literature.

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Section: Polymerization Shrinkage: Methods For Evaluationmentioning

confidence: 99%

Shrinkage Stresses Generated during Resin-Composite Applications: A Review

Schneider¹,

Cavalcante²,

Silikas³

2010

Journal of Dental Biomechanics

159

126

View full text Add to dashboard Cite

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“…Shrinkage is widely recognized as an inherent phenomenon in polymerizable monomer resins when polymerization occurs [ 18 , 19 , 20 ]. There have been different methods to measure the volumetric shrinkage of composite resins, such as the use of the mercury dilatometer, the Archimedes method, and the video imaging method [ 44 , 45 , 46 , 47 , 48 ]. AcuVol is a video imaging measurement system that allows for noncontact visual analysis of volume changes in small-volume samples, and it determines volumetric shrinkage in real time based on optical measurements and pattern recognition [ 47 , 48 ].…”

Section: Discussionmentioning

confidence: 99%

Assessment of Degree of Conversion and Volumetric Shrinkage of Novel Self-Adhesive Cement

Ling,

Chen,

Malyala

2024

Polymers

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The degree of monomer conversion and polymerization shrinkage are two of the main reasons for potential adhesion failure between the tooth structure and the restoration substrate. To evaluate the degree of conversion and polymerization shrinkage of a newly developed self-adhesive resin cement, the degree of conversion (DC) was measured using FTIR under different activation modes, temperatures, and times. Volumetric shrinkage was tested using the AcuVol video imaging method. The experimental cement showed a higher DC than other cements under self-curing. The DC of the experimental cement was higher than that of other cements, except SpeedCem Plus under light curing. The experimental cement had a higher DC than other cements, except SpeedCem Plus in some conditions under dual curing. All self-adhesive cements had a higher DC at 37 °C than at 23 °C under self-curing, and there was no statistical difference between 23 °C and 37 °C under light curing. All self-adhesive cements showed a significantly higher DC at 10 min than at 5 min under self-curing. There was no statistical difference between 5 min and 10 min for most cements under dual curing. All self-adhesive cements statistically had the same volumetric shrinkage under light curing and self-curing. The newly developed self-adhesive resin cement exhibited a higher degree of conversion and similar volumetric shrinkage compared to these commercial self-adhesive resin cements.

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“…Polymerization shrinkage and its precise measurement remain a challenge to the development of compatible restorative materials [ 41 , 42 ]. Previously, dilatomers and scales where used to measure composite shrinkage [ 43 ], until Sun et al, presented a method using micro-CT to measure the polymerization shrinkage [ 44 ]. The drawback of method by Sun et al is that it does not allow for exact superimposure of the pre- and post-cured samples, as there are too few landmarks to match the two different 3D models.…”

Section: Discussionmentioning

confidence: 99%

Using Copper-Doped Mesoporous Bioactive Glass Nanospheres to Impart Anti-Bacterial Properties to Dental Composites

et al. 2022

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Experimental dental resin composites containing copper-doped mesoporous bioactive glass nanospheres (Cu-MBGN) were developed to impart anti-bacterial properties. Increasing amounts of Cu-MBGN (0, 1, 5 and 10 wt%) were added to the BisGMA/TEGDMA resin matrix containing micro- and nano-fillers of inert glass, keeping the resin/filler ratio constant. Surface micromorphology and elemental analysis were performed to evaluate the homogeneous distribution of filler particles. The study investigated the effects of Cu-MBGN on the degree of conversion, polymerization shrinkage, porosity, ion release and anti-bacterial activity on S. mutans and A. naeslundii. Experimental materials containing Cu-MBGN showed a dose-dependent Cu release with an initial burst and a further increase after 28 days. The composite containing 10% Cu-MBGN had the best anti-bacterial effect on S. mutans, as evidenced by the lowest adherence of free-floating bacteria and biofilm formation. In contrast, the 45S5-containing materials had the highest S. mutans adherence. Ca release was highest in the bioactive control containing 15% 45S5, which correlated with the highest number of open porosities on the surface. Polymerization shrinkage was similar for all tested materials, ranging from 3.8 to 4.2%, while the degree of conversion was lower for Cu-MBGN materials. Cu-MBGN composites showed better anti-bacterial properties than composites with 45S5 BG.

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A modified dilatometer for continuous recording of volumetric polymerization shrinkage of composite restorative materials

Cited by 93 publications

References 7 publications

Shrinkage Stresses Generated during Resin-Composite Applications: A Review

Shrinkage Stresses Generated during Resin-Composite Applications: A Review

Assessment of Degree of Conversion and Volumetric Shrinkage of Novel Self-Adhesive Cement

Using Copper-Doped Mesoporous Bioactive Glass Nanospheres to Impart Anti-Bacterial Properties to Dental Composites

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