Effect of surface treatments on shear-bond strength of glass-ionomer cements to silver diammine-fluoride treated simulated carious dentine / Koh Wen Thong
Objectives: This study investigated the effect of different surface treatments on the shear-bond strength (SBS) and failure modes of high-viscosity glass-ionomer cements (HVGIC) and resin-modified glass-ionomer cements (RMGIC) to silver-diamminefluoride (SDF)-treated simulated carious dentine (SC...
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2024
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my.um.stud.155502025-02-17T19:08:12Z Effect of surface treatments on shear-bond strength of glass-ionomer cements to silver diammine-fluoride treated simulated carious dentine / Koh Wen Thong Koh , Wen Thong RK Dentistry Objectives: This study investigated the effect of different surface treatments on the shear-bond strength (SBS) and failure modes of high-viscosity glass-ionomer cements (HVGIC) and resin-modified glass-ionomer cements (RMGIC) to silver-diamminefluoride (SDF)-treated simulated carious dentine (SCD). Material and Methods: One hundred and fifty extracted human premolars were sectioned and pH-cycled for ten days to simulate carious dentine. In Part A, the demineralised specimens were treated with 38% SDF (Riva Star) for 2 mins, washed, stored in deionised distilled water at 37°C for two weeks, and subjected to the following surface treatments (n=14): T1 - no treatment (control); T2 - 10 seconds polyacrylic acid (PAA); T3 - 5 seconds phosphoric acid (PPA); T4 - 5 seconds PPA plus universal adhesive (Zipbond); T5 - 5 seconds PPA plus RMGIC adhesive (Riva bond LC). High Viscosity Glass-ionomer Cements (Riva Self-cure HV [SC]) and RMGIC (Riva Lightcure HV [LC]) restoratives were applied to the conditioned specimens and stored in artificial saliva at 37°C for one week. SBS was subsequently performed with a Universal Testing Machine (a load of 500N and crosshead speed of 1mm/min). Failure modes were appraised using a stereomicroscope coupled with the ImageJ software. Statistical analysis was done with Kruskal-Wallis/ post hoc pairwise comparisons (α=.05) and Chi-square tests with Bonferroni adjustment (α=0.05). In Part B, the interface between the HVGIC and dentine (n=1) was carried out using scanning electron microscopy (SEM) and energy-dispersive X-ray analysis (EDX). Results: In part A, the highest SBS was observed when SC and LC were restored with T2 and T5, respectively. Significant differences in SBS were as followed: SC - T2, T1 >T5, T3; LC - T5, T4, T3 > T2. For T3 and T5, SBS achieved with LC was significantly greater than SC. SC generally exhibited adhesive failures. Conversely, LC exhibited mostly adhesive and mixed failure in the material for most surface treatments. In part B, The SEM demonstrated smooth and continuous layer of adhesive in the SC group. The presence of a short and discrete resin tag was seen with thin hybrid layer in phosphoric acid-treated LC groups. The EDX data demonstrated that there were detected fluoride and silver ions levels in all groups. In LC-T5, it was reported that the content of Ag is highly detected (3.30 at%) on the dentinal surface. Conclusion: The preferred method for surface-treating SDF-treated simulated carious dentine before restoration application is PAA for SC and PPA plus RMGIC adhesive for LC. 2024-01 Thesis NonPeerReviewed application/pdf http://studentsrepo.um.edu.my/15550/2/Koh_Wen_Thong.pdf application/pdf http://studentsrepo.um.edu.my/15550/1/Koh_Wen_Thong.pdf Koh , Wen Thong (2024) Effect of surface treatments on shear-bond strength of glass-ionomer cements to silver diammine-fluoride treated simulated carious dentine / Koh Wen Thong. Masters thesis, Universiti Malaya. http://studentsrepo.um.edu.my/15550/ |
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RK Dentistry Koh , Wen Thong Effect of surface treatments on shear-bond strength of glass-ionomer cements to silver diammine-fluoride treated simulated carious dentine / Koh Wen Thong |
| description |
Objectives: This study investigated the effect of different surface treatments on the
shear-bond strength (SBS) and failure modes of high-viscosity glass-ionomer cements
(HVGIC) and resin-modified glass-ionomer cements (RMGIC) to silver-diamminefluoride
(SDF)-treated simulated carious dentine (SCD).
Material and Methods: One hundred and fifty extracted human premolars were
sectioned and pH-cycled for ten days to simulate carious dentine. In Part A, the
demineralised specimens were treated with 38% SDF (Riva Star) for 2 mins, washed,
stored in deionised distilled water at 37°C for two weeks, and subjected to the following
surface treatments (n=14): T1 - no treatment (control); T2 - 10 seconds polyacrylic acid
(PAA); T3 - 5 seconds phosphoric acid (PPA); T4 - 5 seconds PPA plus universal
adhesive (Zipbond); T5 - 5 seconds PPA plus RMGIC adhesive (Riva bond LC). High
Viscosity Glass-ionomer Cements (Riva Self-cure HV [SC]) and RMGIC (Riva Lightcure
HV [LC]) restoratives were applied to the conditioned specimens and stored in
artificial saliva at 37°C for one week. SBS was subsequently performed with a
Universal Testing Machine (a load of 500N and crosshead speed of 1mm/min). Failure
modes were appraised using a stereomicroscope coupled with the ImageJ software.
Statistical analysis was done with Kruskal-Wallis/ post hoc pairwise comparisons
(α=.05) and Chi-square tests with Bonferroni adjustment (α=0.05). In Part B, the
interface between the HVGIC and dentine (n=1) was carried out using scanning electron
microscopy (SEM) and energy-dispersive X-ray analysis (EDX).
Results: In part A, the highest SBS was observed when SC and LC were restored with
T2 and T5, respectively. Significant differences in SBS were as followed: SC - T2, T1
>T5, T3; LC - T5, T4, T3 > T2. For T3 and T5, SBS achieved with LC was significantly
greater than SC. SC generally exhibited adhesive failures. Conversely, LC exhibited mostly adhesive and mixed failure in the material for most surface treatments. In part
B, The SEM demonstrated smooth and continuous layer of adhesive in the SC group.
The presence of a short and discrete resin tag was seen with thin hybrid layer in
phosphoric acid-treated LC groups. The EDX data demonstrated that there were
detected fluoride and silver ions levels in all groups. In LC-T5, it was reported that the
content of Ag is highly detected (3.30 at%) on the dentinal surface.
Conclusion: The preferred method for surface-treating SDF-treated simulated carious
dentine before restoration application is PAA for SC and PPA plus RMGIC adhesive
for LC.
|
| format |
Thesis |
| author |
Koh , Wen Thong |
| author_facet |
Koh , Wen Thong |
| author_sort |
Koh , Wen Thong |
| title |
Effect of surface treatments on shear-bond strength of glass-ionomer cements to silver diammine-fluoride treated simulated carious dentine / Koh Wen Thong |
| title_short |
Effect of surface treatments on shear-bond strength of glass-ionomer cements to silver diammine-fluoride treated simulated carious dentine / Koh Wen Thong |
| title_full |
Effect of surface treatments on shear-bond strength of glass-ionomer cements to silver diammine-fluoride treated simulated carious dentine / Koh Wen Thong |
| title_fullStr |
Effect of surface treatments on shear-bond strength of glass-ionomer cements to silver diammine-fluoride treated simulated carious dentine / Koh Wen Thong |
| title_full_unstemmed |
Effect of surface treatments on shear-bond strength of glass-ionomer cements to silver diammine-fluoride treated simulated carious dentine / Koh Wen Thong |
| title_sort |
effect of surface treatments on shear-bond strength of glass-ionomer cements to silver diammine-fluoride treated simulated carious dentine / koh wen thong |
| publishDate |
2024 |
| url |
http://studentsrepo.um.edu.my/15550/2/Koh_Wen_Thong.pdf http://studentsrepo.um.edu.my/15550/1/Koh_Wen_Thong.pdf http://studentsrepo.um.edu.my/15550/ |
| _version_ |
1825160882292785152 |
| score |
13.251813 |