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Effect of Er,Cr:YSGG Laser at Different Output Powers on the Micromorphology and the Bond Property of Non-Carious Sclerotic Dentin to Resin Composites.

Sun X, Ban J, Sha X, Wang W, Jiao Y, Wang W, Yang Y, Wei J, Shen L, Chen J - PLoS ONE (2015)

Bottom Line: The 4W laser group showed the highest roughness value (30.84±1.93μm), which was statistically higher than the control group and the diamond bur groups (p<0.05).The mean percentages ((27.8±1.8)%, (28.0±2.2)%, (30.0±1.9)%) of open tubules area in the 4W, 5W, 6W group were higher than other groups (p<0.05).The 4W laser group showed the highest micro-shear bond strength not only in immediately tested (17.60±2.55 PMa) but after thermocycling (14.35±2.08MPa).

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory of Military Stomatology, Department of VIP Dental Care, School of Stomatology, The Fourth Military Medical University, Xi'an, P.R. China.

ABSTRACT

Background: The objective of this study was to investigate the influence of Er,Cr:YSGG laser irradiated at different powers on the micromorphology and the bonding property of non-carious sclerotic dentin to resin composites.

Methods: Two hundred bovine incisors characterized by non-carious sclerotic dentin were selected, and the seventy-two teeth of which for surface morphological analysis were divided into nine groups according to various treatments (A: the control group, B: only treated with the adhesive Adper Easy One, C: diamond bur polishing followed by Adper Easy One, D-I: Er,Cr:YSGG laser irradiating at 1W, 2W, 3W, 4W, 5W, 6W output power, respectively, followed by Adper Easy One). The surface roughness values were measured by the non-contact three-dimensional morphology scanner, then the surface micromorphologies of surfaces in all groups were assessed by scanning electron microscopy (SEM); meanwhile, Image Pro-Plus 6.0 software was used to measure the relative percentage of open tubules on SEM images. The rest, one hundred twenty-eight teeth for bond strength test, were divided into eight groups according to the different treatments (A: only treated with the adhesive Adper Easy One, B: diamond bur polishing followed by the above adhesive, C-H: Er,Cr:YSGG laser irradiating at 1 W, 2 W, 3 W, 4 W, 5 W, 6 W output power, respectively, followed by the above adhesive), and each group was subsequently divided into two subgroups according to whether aging is performed (immediately tested and after thermocycling). Micro-shear bond strength test was used to evaluate the bond strength.

Results: The 4W laser group showed the highest roughness value (30.84±1.93μm), which was statistically higher than the control group and the diamond bur groups (p<0.05). The mean percentages ((27.8±1.8)%, (28.0±2.2)%, (30.0±1.9)%) of open tubules area in the 4W, 5W, 6W group were higher than other groups (p<0.05). The 4W laser group showed the highest micro-shear bond strength not only in immediately tested (17.60±2.55 PMa) but after thermocycling (14.35±2.08MPa).

Conclusion: The Er,Cr:YSGG laser at 4W power can effectively improve the bonding property between non-carious sclerotic dentin and resin composites by increasing the roughness and mean percentage area of open tubules.

No MeSH data available.


Related in: MedlinePlus

Mean surface roughness values of non-carious sclerotic dentin in all groups.(A) The control group without any treatment; (B) Adper Easy One adhesive treatment; (C) Diamond bur polishing followed by the application.of Adper Easy One adhesive; (D, E, F, G, H, and I) Er,Cr:YSGG laser irradiation at 1W, 2W, 3W, 4W, 5W, and 6 W, respectively, and followed by the application of Adper Easy One adhesive.
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pone.0142311.g002: Mean surface roughness values of non-carious sclerotic dentin in all groups.(A) The control group without any treatment; (B) Adper Easy One adhesive treatment; (C) Diamond bur polishing followed by the application.of Adper Easy One adhesive; (D, E, F, G, H, and I) Er,Cr:YSGG laser irradiation at 1W, 2W, 3W, 4W, 5W, and 6 W, respectively, and followed by the application of Adper Easy One adhesive.

Mentions: Fig 1 displays representative 3D surface morphology images obtained from all the groups with the 3D morphology scanner. The blue areas showed the lowest places while the pink areas were the highest places in the figures. The bigger the scaleplate maximum value on the right of the image was, the greater the difference between the lowest and highest place was, which means the higher roughness value. Meanwhile, the mean Sa values of non-carious sclerotic dentin, which corresponded to the Fig 1 images in all groups, could be obtained and were showed in Fig 2. By the statistical analysis, the 4W laser group showed the highest Sa value among the groups (p<0.05) while the control group had the lowest Sa value which was similar to the etching group (p = 1.0). The Sa value of the diamond bur group showed no significant difference with the 2W, 3W and 5W laser group (p>0.05), and was statistically higher than the control group, etching group, 1W and 6W group (p<0.05). In laser groups, the 5W laser group as well as the 6W laser group showed no significant difference with 2W and 3W laser group (p>0.05).


Effect of Er,Cr:YSGG Laser at Different Output Powers on the Micromorphology and the Bond Property of Non-Carious Sclerotic Dentin to Resin Composites.

Sun X, Ban J, Sha X, Wang W, Jiao Y, Wang W, Yang Y, Wei J, Shen L, Chen J - PLoS ONE (2015)

Mean surface roughness values of non-carious sclerotic dentin in all groups.(A) The control group without any treatment; (B) Adper Easy One adhesive treatment; (C) Diamond bur polishing followed by the application.of Adper Easy One adhesive; (D, E, F, G, H, and I) Er,Cr:YSGG laser irradiation at 1W, 2W, 3W, 4W, 5W, and 6 W, respectively, and followed by the application of Adper Easy One adhesive.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4636353&req=5

pone.0142311.g002: Mean surface roughness values of non-carious sclerotic dentin in all groups.(A) The control group without any treatment; (B) Adper Easy One adhesive treatment; (C) Diamond bur polishing followed by the application.of Adper Easy One adhesive; (D, E, F, G, H, and I) Er,Cr:YSGG laser irradiation at 1W, 2W, 3W, 4W, 5W, and 6 W, respectively, and followed by the application of Adper Easy One adhesive.
Mentions: Fig 1 displays representative 3D surface morphology images obtained from all the groups with the 3D morphology scanner. The blue areas showed the lowest places while the pink areas were the highest places in the figures. The bigger the scaleplate maximum value on the right of the image was, the greater the difference between the lowest and highest place was, which means the higher roughness value. Meanwhile, the mean Sa values of non-carious sclerotic dentin, which corresponded to the Fig 1 images in all groups, could be obtained and were showed in Fig 2. By the statistical analysis, the 4W laser group showed the highest Sa value among the groups (p<0.05) while the control group had the lowest Sa value which was similar to the etching group (p = 1.0). The Sa value of the diamond bur group showed no significant difference with the 2W, 3W and 5W laser group (p>0.05), and was statistically higher than the control group, etching group, 1W and 6W group (p<0.05). In laser groups, the 5W laser group as well as the 6W laser group showed no significant difference with 2W and 3W laser group (p>0.05).

Bottom Line: The 4W laser group showed the highest roughness value (30.84±1.93μm), which was statistically higher than the control group and the diamond bur groups (p<0.05).The mean percentages ((27.8±1.8)%, (28.0±2.2)%, (30.0±1.9)%) of open tubules area in the 4W, 5W, 6W group were higher than other groups (p<0.05).The 4W laser group showed the highest micro-shear bond strength not only in immediately tested (17.60±2.55 PMa) but after thermocycling (14.35±2.08MPa).

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory of Military Stomatology, Department of VIP Dental Care, School of Stomatology, The Fourth Military Medical University, Xi'an, P.R. China.

ABSTRACT

Background: The objective of this study was to investigate the influence of Er,Cr:YSGG laser irradiated at different powers on the micromorphology and the bonding property of non-carious sclerotic dentin to resin composites.

Methods: Two hundred bovine incisors characterized by non-carious sclerotic dentin were selected, and the seventy-two teeth of which for surface morphological analysis were divided into nine groups according to various treatments (A: the control group, B: only treated with the adhesive Adper Easy One, C: diamond bur polishing followed by Adper Easy One, D-I: Er,Cr:YSGG laser irradiating at 1W, 2W, 3W, 4W, 5W, 6W output power, respectively, followed by Adper Easy One). The surface roughness values were measured by the non-contact three-dimensional morphology scanner, then the surface micromorphologies of surfaces in all groups were assessed by scanning electron microscopy (SEM); meanwhile, Image Pro-Plus 6.0 software was used to measure the relative percentage of open tubules on SEM images. The rest, one hundred twenty-eight teeth for bond strength test, were divided into eight groups according to the different treatments (A: only treated with the adhesive Adper Easy One, B: diamond bur polishing followed by the above adhesive, C-H: Er,Cr:YSGG laser irradiating at 1 W, 2 W, 3 W, 4 W, 5 W, 6 W output power, respectively, followed by the above adhesive), and each group was subsequently divided into two subgroups according to whether aging is performed (immediately tested and after thermocycling). Micro-shear bond strength test was used to evaluate the bond strength.

Results: The 4W laser group showed the highest roughness value (30.84±1.93μm), which was statistically higher than the control group and the diamond bur groups (p<0.05). The mean percentages ((27.8±1.8)%, (28.0±2.2)%, (30.0±1.9)%) of open tubules area in the 4W, 5W, 6W group were higher than other groups (p<0.05). The 4W laser group showed the highest micro-shear bond strength not only in immediately tested (17.60±2.55 PMa) but after thermocycling (14.35±2.08MPa).

Conclusion: The Er,Cr:YSGG laser at 4W power can effectively improve the bonding property between non-carious sclerotic dentin and resin composites by increasing the roughness and mean percentage area of open tubules.

No MeSH data available.


Related in: MedlinePlus