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Evaluation of cuspal deflection in premolar teeth restored with low shrinkable resin composite (in vitro study).

Labib LM, Nabih SM, Baroudi K - J Int Soc Prev Community Dent (2015 Nov-Dec)

Bottom Line: This study was done to investigate the effect of polymerization shrinkage stresses of two resin composite materials (Filtek Z350 and Filtek P90) on cuspal deflection of mesio-occluso-distal restoration.A significant increase in cuspal deflection of cavities restored with the methacrylate-based (Filtek Z350) compared with the silorane (P90) resin-based composites was obtained.The change in the organic matrix or materials formulation of the resin composite using silorane has a positive effect on controlling the cusp deflection.

View Article: PubMed Central - PubMed

Affiliation: Department of Restorative Dental Sciences, Alfarabi Colleges, Riyadh, Kingdom of Saudi Arabia.

ABSTRACT

Objectives: This study evaluated cuspal deflection in premolar teeth restored with low shrinkable resin composite.

Materials and methods: A total of 40 human premolars were used for cuspal deflection evaluation in this study. Each group was divided into four equal groups according to the type of resin composite and the adhesive used as follows: group A: Using low shrinkable resin composite (silorane) with its adhesive system; group B: Using low shrinkable composite (silorane) with G-bond; group C: Using Filtek Z350 composite with G-bond; and group D: Using Filtek Z350 composite with AdheSE. Cusp deflection was detected using Universal measuring microscope and laser horizontal metroscope.

Results: This study was done to investigate the effect of polymerization shrinkage stresses of two resin composite materials (Filtek Z350 and Filtek P90) on cuspal deflection of mesio-occluso-distal restoration. For this study, the extracted non-carious maxillary second premolars were selected. Forty teeth that showed no more than 5% variation in their dimensions were used. A significant increase in cuspal deflection of cavities restored with the methacrylate-based (Filtek Z350) compared with the silorane (P90) resin-based composites was obtained.

Conclusion: The change in the organic matrix or materials formulation of the resin composite using silorane has a positive effect on controlling the cusp deflection.

No MeSH data available.


Related in: MedlinePlus

Cusp deflection of methacrylate with G-bond adhesive
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Figure 7: Cusp deflection of methacrylate with G-bond adhesive

Mentions: Cuspal deflection (µm) for Filtek P90 and Filtek Z350 are presented in Figures 4–7. Changes in cuspal deflection over time of Filtek P90 with its adhesive (group A) were 3.5 µm at 5.7 min after curing, −0.7 µm at 11.5 min, −0.5 µm at 17.3 min, 0.4 µm at 23 min, 0.2 µm at 28.2 min, and −0.8 µm at 34.6 min, while those of Filtek Z350 with AdheSE adhesive (group D) were −3.4 µm at 5.5 min after curing, −4.3 µm at 11.18 min, −4.1 µm at 16.7 min, −3.9 µm at 22.3 min, −5.3 µm at 27.9 min, and −6.3 µm at 33.5 min.


Evaluation of cuspal deflection in premolar teeth restored with low shrinkable resin composite (in vitro study).

Labib LM, Nabih SM, Baroudi K - J Int Soc Prev Community Dent (2015 Nov-Dec)

Cusp deflection of methacrylate with G-bond adhesive
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4697231&req=5

Figure 7: Cusp deflection of methacrylate with G-bond adhesive
Mentions: Cuspal deflection (µm) for Filtek P90 and Filtek Z350 are presented in Figures 4–7. Changes in cuspal deflection over time of Filtek P90 with its adhesive (group A) were 3.5 µm at 5.7 min after curing, −0.7 µm at 11.5 min, −0.5 µm at 17.3 min, 0.4 µm at 23 min, 0.2 µm at 28.2 min, and −0.8 µm at 34.6 min, while those of Filtek Z350 with AdheSE adhesive (group D) were −3.4 µm at 5.5 min after curing, −4.3 µm at 11.18 min, −4.1 µm at 16.7 min, −3.9 µm at 22.3 min, −5.3 µm at 27.9 min, and −6.3 µm at 33.5 min.

Bottom Line: This study was done to investigate the effect of polymerization shrinkage stresses of two resin composite materials (Filtek Z350 and Filtek P90) on cuspal deflection of mesio-occluso-distal restoration.A significant increase in cuspal deflection of cavities restored with the methacrylate-based (Filtek Z350) compared with the silorane (P90) resin-based composites was obtained.The change in the organic matrix or materials formulation of the resin composite using silorane has a positive effect on controlling the cusp deflection.

View Article: PubMed Central - PubMed

Affiliation: Department of Restorative Dental Sciences, Alfarabi Colleges, Riyadh, Kingdom of Saudi Arabia.

ABSTRACT

Objectives: This study evaluated cuspal deflection in premolar teeth restored with low shrinkable resin composite.

Materials and methods: A total of 40 human premolars were used for cuspal deflection evaluation in this study. Each group was divided into four equal groups according to the type of resin composite and the adhesive used as follows: group A: Using low shrinkable resin composite (silorane) with its adhesive system; group B: Using low shrinkable composite (silorane) with G-bond; group C: Using Filtek Z350 composite with G-bond; and group D: Using Filtek Z350 composite with AdheSE. Cusp deflection was detected using Universal measuring microscope and laser horizontal metroscope.

Results: This study was done to investigate the effect of polymerization shrinkage stresses of two resin composite materials (Filtek Z350 and Filtek P90) on cuspal deflection of mesio-occluso-distal restoration. For this study, the extracted non-carious maxillary second premolars were selected. Forty teeth that showed no more than 5% variation in their dimensions were used. A significant increase in cuspal deflection of cavities restored with the methacrylate-based (Filtek Z350) compared with the silorane (P90) resin-based composites was obtained.

Conclusion: The change in the organic matrix or materials formulation of the resin composite using silorane has a positive effect on controlling the cusp deflection.

No MeSH data available.


Related in: MedlinePlus