Microleakage of composite resin restoration in cavities prepared by Er,Cr: YSGG laser irradiation and etched bur cavities in primary teeth

2002 ◽  
Vol 26 (3) ◽  
pp. 263-268 ◽  
Author(s):  
Mozammal Hossain ◽  
Yukio Nakamura ◽  
Yoshishige Yamada ◽  
Yoshiko Murakami ◽  
Koukichi Matsumoto
Keyword(s):  
Laser Irradiation ◽  
Primary Teeth ◽  
Composite Resin ◽  
In Vitro Study ◽  
Laser Cavity ◽  
Cavity Surface ◽  
Good Adhesion ◽  
Acid Etch ◽  
Composite Resin Restoration

In this in vitro study, the surface alterations of enamel and dentin in cavities prepared by Er,Cr:YSGG laser irradiation was investigated by scanning electron microscopy and compared to the microleakage degree after composite resin restoration with etched bur cavities in human primary teeth. The results confirmed that laser cavity surface facilitated a good adhesion with the restorative materials; the acid etch step can be easily avoided with the laser treatment.

Compositional and structural changes of human dentin following caries removal by Er, Cr: YSGG laser irradiation in primary teeth

2002 ◽  
Vol 26 (4) ◽  
pp. 377-382 ◽  
Author(s):  
Mozammal Hossain ◽  
Yukio Nakamura ◽  
Yoshishige Yamada ◽  
Yoshiko Murakami ◽  
Koukichi Matsumoto
Keyword(s):  
Laser Irradiation ◽  
Structural Changes ◽  
Primary Teeth ◽  
Thermal Damage ◽  
In Vitro Study ◽  
Surface Characteristic ◽  
Human Dentin ◽  
Caries Removal ◽  
Induced Changes

In this in vitro study, the compositional and structural changes of human dentin, and knoop harness of cavity floor following the removal of dental caries by Er,Cr:YSGG laser irradiation in primary teeth was compared with that of the conventional bur cavity. The results confirmed that laser irradiation revealed minimal thermal damage to the surrounding tissues, minimal thermal induced changes of dental hard tissue compositions, and favorable surface characteristic.

scholarly journals The Effects of Different Antioxidant Agents on the Microtensile Bond Strength of Composite Resin to Bleached Enamel

2021 ◽  
pp. 258-269
Author(s):  
Nurcan Ozakar Ilday ◽  
Ozcan Karatas ◽  
Latife Altınok Uygun ◽  
Pınar Gul
Keyword(s):  
Bond Strength ◽  
Composite Resin ◽  
Artificial Saliva ◽  
In Vitro Study ◽  
Microtensile Bond Strength ◽  
Antioxidant Agents ◽  
Composite Resin Restoration ◽  
Post Hoc ◽  
One Way Anova

Objective: The objective of this in vitro study is to examine the effect of antioxidants on the bonding strength of composite resin to bleached enamel. Materials and Methods: One hundred twenty non decay teeth were used in this study. Specimens were cut from the enamel cement junction. Then the specimens were randomly assigned into two groups-office bleaching and home bleaching. Bleaching antioxidants were applied to the first 12 subgroups. The specimens in the remaining 12 groups were kept in artificial saliva for 14 days and antioxidants were applied. Composite resin restoration was applied to all specimens. A cutting device was employed to obtain six specimens (0.9mm) from each tooth, and the microtensile bond strength (μTBS) test was performed. Data were analyzed using one-way ANOVA, the paired t-test, and Duncan’s post hoc test (p=0.05). Results: In office bleaching specimens, immediate antioxidant application increased the μTBS values (p<0.05). Comparisons of the antioxidants individually revealed that bonding values increased after two weeks in specimens subjected to antioxidant application (p<0.05). In office bleaching specimens, immediate antioxidant application increased the μTBS values (p>0.05). Mean μTBS values in the groups to which antioxidants were applied two weeks after home bleaching were higher than those in the groups in which antioxidants were applied immediately. Conclusion: The use of antioxidants after bleaching may increase the MTBS value.  The clinician should take this into account especially in immediate restoration applications after bleaching.

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