Analysis of gap formation at tooth-composite resin interface: effect of C-factor and light-curing protocol

Santos, Gustavo Oliveira dos; Silva, Antônio Henrique da Fonseca Thomé da Monteiro; Guimarães, J.R.C.; Barcellos, Alexandre de Araújo Lima; Sampaio, Eduardo Martins; Silva, Eduardo Moreira da

doi:10.1590/s1678-77572007000400006

Cited by 14 publications

(19 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There were two different behaviors observed in this study: first, the higher the angle formed at the cavosurface margin, the lower the VMS (Figure 3) and MPS (Figure 4), except in the cylindrical cavity, where the geometry changed the isocurve distribution 1 and, second, the greatest stress was not located on the edge ( Figure 5). Figure 5 shows that the cavosurface angle influences the value of the tensile stress, the smaller the angle of tooth structure, the greater the stress concentration.…”

mentioning

confidence: 74%

“…If the material is rigid, the shrinkage of the composite can induce stress on adhesive interfaces that mechanically challenge the hybrid layer and potentially overcome the bond strength at the interface. 1,2 Gaps in the interface can allow marginal leakage, followed by discoloration and bacterial contamination. The association of secondary caries and marginal staining with failures of the adhesive interface would be rational, in spite of the absence of validating clinical studies.…”

Section: Introductionmentioning

confidence: 99%

“…7 Besides the polymerization reaction, other factors can influence the shrinkage stresses and gap formation at the tooth-restoration interface. 1 Since microleakage can lead to clinical restoration failures, a good marginal adaptation might increase the service life of a resin composite. The quality of the marginal adaptation can be influenced by the bonding system and by factors related to the stress developed during the polymerization of the material.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Impact of Quantity of Resin, C-factor, and Geometry on Resin Composite Polymerization Shrinkage Stress in Class V Restorations

Tribst

Borges

Xavier

et al. 2014

Operative Dentistry

View full text Add to dashboard Cite

Adhesive dentistry allows for the simple removal of decayed tissue to guide preparation design. Knowledge about differences in stress concentration within cavities can help in understanding the impact of shape and cavosurface angle of the cavity, optimizing the distribution of stress during the cure of the restorative material and improving the expected lifetime of the restoration. SUMMARYObjective: This study evaluated the effect of quantity of resin composite, C-factor, and geometry in Class V restorations on shrinkage stress after bulk fill insertion of resin using two-dimensional finite element analysis.Methods: An image of a buccolingual longitudinal plane in the middle of an upper first premolar and supporting tissues was used for modeling 10 groups: cylindrical cavity, erosion, and abfraction lesions with the same Cfactor (1.57), a second cylindrical cavity and abfraction lesion with the same quantity of resin (QR) as the erosion lesion, and then all repeated with a bevel on the occlusal cavosurface angle. The 10 groups were imported into Ansys 13.0 for two-dimensional finite element analysis. The mesh was built with 30,000 triangle and square elements of 0.1 mm in length for all the models. All materials were considered isotropic, homogeneous, elastic, and linear, and the resin composite shrinkage was simulated by thermal analogy. The maximum principal (MPS) and von Mises stresses (VMS) were analyzed for comparing the behavior of the groups.Results: Different values of angles for the cavosurface margin in enamel and dentin were obtained for all groups and the higher the angle, the lower the stress concentration. When the groups with the same C-factor and QR were compared, the erosion shape cavity showed the highest MPS and VMS values, and abfraction shape, the lowest. A cavosurface bevel decreased the stress values on the occlusal margin. The geometry factor overcame the effects of C-factor and QR in some situations.Conclusion: Within the limitations of the current methodology, it is possible to conclude that the combination of all variables studied influences the stress, but the geometry is the most important factor to be considered by the operator.

show abstract

mentioning

confidence: 74%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Impact of Quantity of Resin, C-factor, and Geometry on Resin Composite Polymerization Shrinkage Stress in Class V Restorations

Tribst

Borges

Xavier

et al. 2014

Operative Dentistry

View full text Add to dashboard Cite

show abstract

“…Clinical variables include material manipulation and insertion techniques, isolation constraints (usage of dental rubber dam), and adequate knowledge of adhesive and composite resin science and applicable technique. [9][10][11][12][13][14][15][16] Composite resin, used as a posterior restorative, is significantly influenced by polymerization shrinkage with amounts ranging from 1.5% to 5%. 11 Shrinkage causes debonding of the material from tooth structure, precipitating clinical and radiographic sequelae including marginal staining and micro-gap formation (approximately 10 to 20 lm).…”

Section: Introductionmentioning

confidence: 99%

Microleakage of Class I and II Composite Resin Restorations Using a Sonic-resin Placement System

Kalmowicz

Phebus

Owens

et al. 2015

Operative Dentistry

View full text Add to dashboard Cite

show abstract

“…The volumetric contraction causes debonding forces at the material/tooth interface (3). The stress resulting from this shrinkage has been associated with open margins between the restoration and the tooth, overt tooth straining or fracture, and post operative sensitivity (3,4). Adhesive failure can also occur at the internal interface, leading to the formation of an internal gap between the material and the dentin surface (2).…”

Section: Introductionmentioning

confidence: 99%

Marginal microleakage of class II composite resin restorations due to restorative techniques

Carvalho¹,

Moreira²,

Cunha³

et al. 2010

Rev. odonto ciênc. (Online)

View full text Add to dashboard Cite

Purpose: To evaluate the marginal microleakage of class II composite resin (CR) restorations due to restorative techniques.Methods: Forty human extracted premolars were assigned to 4 groups (n=10). Class II cavities were prepared (4-mm wide, 2-mm axially, with the gingival margin located 1 mm beyond the cementum-enamel-junction), and the restorative adhesive system Prime & Bond 2.1/TPH 3 (Dentsply) was used. CR was inserted by the oblique incremental technique (OIT) and cured in continuous exposure. The restoratives techniques were: group 1 (control): OIT; group 2: flowable resin (1 mm) applied in the gingival wall + OIT; group 3: OIT + three pre-cured spheres inserted in the first increment of CR; and, group 4: OIT + strip of fiberglass inserted in the first increment of CR. The specimens were subjected to a thermocycling regimen of 500 cycles (1 min at 5º-37º-55ºC), coated with two layers of nail varnish up to 1 mm from the restoration margins, and immersed in 0.5% basic fuchsine solution for 24 h. The extension of dye penetration at the cervical wall (µm) was evaluated using an optic microscope at x40. Data were analyzed using analysis of variance (ANOVA) (α=0.05).Results: The microleakage values were: G1: 370 µm ± 241; G2: 398 µm ± 354; G3: 205 µm ± 119; and G4: 413 µm ± 340. No statistically significant differences were found among the restorative techniques (P=0.081). Conclusion:Marginal microleakage values were not influenced by the different restorative techniques tested.

show abstract

Analysis of gap formation at tooth-composite resin interface: effect of C-factor and light-curing protocol

Cited by 14 publications

References 24 publications

Impact of Quantity of Resin, C-factor, and Geometry on Resin Composite Polymerization Shrinkage Stress in Class V Restorations

Impact of Quantity of Resin, C-factor, and Geometry on Resin Composite Polymerization Shrinkage Stress in Class V Restorations

Microleakage of Class I and II Composite Resin Restorations Using a Sonic-resin Placement System

Marginal microleakage of class II composite resin restorations due to restorative techniques

Contact Info

Product

Resources

About