Microcomputerised tomography evaluation of 10% carbamide peroxide applied to enamel

Efeoglu, Neslihan; Wood, David; Efeoğlu, Candan

doi:10.1016/j.jdent.2004.12.001

Cited by 118 publications

(113 citation statements)

References 23 publications

(34 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…8,9 Some of the complications of applying bleaching agents in tooth hard tissues are changes in tooth chemical structure, demineralization and decreases in the mineral content including calcium and phosphate, 14,25,26 decreases in the fluoride content of enamel, 11 and changes in the micromorphology of enamel. 9,27,28 However, other studies have reported different results with no statistically significant differences in tooth hard tissue characteristics, including enamel and dentin surface roughness, after bleaching with 10% and 15% carbamide peroxide. 17,18,[29][30][31] The discrepancies in the results of various studies might be attributed to differences in the formulation and concentration of bleaching agents; the duration of daily applications or treatment protocols; differences in study designs, including the environments in which the specimens are stored (eg, artificial or human saliva); the use of remineralizing agents; continuous use of fluoridated toothpastes; and the technique of toothbrushing during the procedure and after bleaching.…”

Section: Discussionmentioning

confidence: 99%

Effect of Delaying Toothbrushing During Bleaching on Enamel Surface Roughness: An In Vitro Study

Navimipour

Mohammadi

Mostafazadeh

et al. 2013

Operative Dentistry

View full text Add to dashboard Cite

SUMMARY This study aimed to evaluate the effect of toothbrushing on enamel surface roughness at three different intervals after daily bleaching treatment. Eighty enamel slabs were initially evaluated for surface roughness and then randomly divided into four groups. The bleaching procedure was carried out for 21 days, six hours daily. In the control group (group 1), the specimens were not brushed after bleaching, but in groups 2–4, they were brushed with toothpaste immediately, one hour, or two hours after bleaching, respectively. Then the specimens were stored in artificial saliva. Enamel surface roughness was reevaluated at the end of the period. Kruskal-Wallis and Mann-Whitney U tests showed statistically significant differences in the means of surface roughness values between the immediately brushed group and the three other groups (p<0.001). Daily toothbrushing immediately after bleaching increased enamel surface roughness; however, postponing the procedure for one or two hours after daily bleaching and exposing the specimens to artificial saliva during the study period resulted in enamel surface roughness comparable to that of the control group.

show abstract

Section: Discussionmentioning

confidence: 99%

Effect of Delaying Toothbrushing During Bleaching on Enamel Surface Roughness: An In Vitro Study

Navimipour

Mohammadi

Mostafazadeh

et al. 2013

Operative Dentistry

View full text Add to dashboard Cite

show abstract

“…Studies using the micro-CT have started to be used in many fields of clinical dentistry. [13][14][15][16][17][18][19][20][21][22] It is thought to be especially useful in studying the morphology of pulp cavity which can not be directly observed by the naked eye. Two-dimensional image obtained from the micro-CT distinguishes the difference in level of calcification as difference in X-ray translucency.…”

Section: Discussionmentioning

confidence: 99%

Three-dimensional analysis of pulp chambers in maxillary second deciduous molars

Amano

Agematsu

Abe

et al. 2006

Journal of Dentistry

View full text Add to dashboard Cite

Objective. The purpose of this study was to clarify the positional relationship between the crown contour and the pulp chamber using micro-CT system for restorations of maxillary second deciduous molar.Methods. Five maxillary second deciduous molar teeth each from the deciduous dentition and the mixed dentition periods were used. The positional relationship between the crown contour and pulp cha mber was 3-dimensionally observed by micro-CT. In addition, the thickness of the dentin at each of the pulp horns and the volume ratio of the pulp chamber against the whole crown were measured.Results. In relationship to the crown contour and the pulp cha mber, the pulp horn of the mesiobuccal cusp showed greatest protrusion and eminent swelling of its mesial wall in both the deciduous dentition and the mixed dentition periods. Furthermore, the pulp chamber was shifted to the mesial side. The volume ratio of the pulp chamber to the whole crown, the ratio in the mixed dentition period showed to be significantly smaller than in the deciduous dentition period. The dentin thickness at the mesiobuccal pulp horn was the thinest.Conclusions. These results suggest that in preparation of cavities in maxillary second deciduous molars, care is necessary not to expose of the mesiobuccal pulp horn.Especially, the mesial wall of the mesiobuccal pulp horn should be noted.3

show abstract

“…[51][52] Carbamide peroxide-containing agents have been reported to affect the mineral content and organic phase of the superficial layer as well as the inner structure of the enamel. [51][52][53] Such an effect could result in changes in the mechanical properties of enamel, such as fracture toughness, leading to a decrease in bonding strength. Urea, which is a by-product of CP, has been shown to remove enamel proteins and related mineral elements, 54 attacking the core or intra-prismatic area and producing porosities at prism surfaces.…”

Section: Da Silva and Othersmentioning

confidence: 99%

Influence of Prolonged Light-curing Time on the Shear Bonding Strength of Resin to Bleached Enamel

Hussain¹

2010

Operative Dentistry

View full text Add to dashboard Cite

©Operative Dentistry, 2010, 35-6, 672-681 M Hussain • Y Wang Clinical RelevanceThe bonding strength of resin composite to bleached enamel can be enhanced by increasing the light exposure time of light-emitting diode units if bonding is delayed for 24 hours. SUMMARYThis study evaluated the effect of prolonged light-curing time using a light-emitting diode unit (LED) on the shear bond strength of a resin composite to enamel immediately after bleaching. The enamel surfaces of human molars were divided into four groups: one control and three bleaching groups. One bleaching group (CP) was exposed to a 10% carbamide peroxide bleaching agent and bonded after 24 hours. The other two bleaching groups (HP) were bleached with a 38% hydrogen peroxide bleaching agent, then bonded either within one hour (HPA) or after 24 hours (HPB). All groups were subdivided into two subgroups and cured for two different times (20 or 40 seconds) with an LED unit. Shear bond strength (SBS) was tested with a universal-testing machine and the data were analyzed by ANOVA and post-hoc tests. Scanning electron micrographs of representative specimens were taken. A significant difference was seen between the control and HPA groups for both curing times (p=0.000). However, neither the CP nor HPB groups showed any significant differences compared with the control groups (p>0.05). Twoway ANOVA showed that a significant effect of the curing time factor was recorded for all groups (p=0.000). Prolonged curing time, using an LED unit with a light intensity of 500 mW/cm 2 , increased resin-enamel bonding strengths for the control and bleached groups when bonding was performed after 24 hours of immersion in deionized water. However, the SBS was still compromised when bonding was performed immediately to enamel bleached with 38% HP.

show abstract

Microcomputerised tomography evaluation of 10% carbamide peroxide applied to enamel

Cited by 118 publications

References 23 publications

Effect of Delaying Toothbrushing During Bleaching on Enamel Surface Roughness: An In Vitro Study

Effect of Delaying Toothbrushing During Bleaching on Enamel Surface Roughness: An In Vitro Study

Three-dimensional analysis of pulp chambers in maxillary second deciduous molars

Influence of Prolonged Light-curing Time on the Shear Bonding Strength of Resin to Bleached Enamel

Contact Info

Product

Resources

About