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RISS 인기검색어
- 검색키워드
- 저자 : Thongrakard, Ticha (검색결과 4 건)
- 무료
- 기관 내 무료
- 유료
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Thongrakard, Ticha,Wiwatwarrapan, Chairat The Korean Academy of Prosthodonitics 2016 The Journal of Advanced Prosthodontics Vol.8 No.4
PURPOSE. This study evaluated the effect of chemical surface treatment using methyl formate-methyl acetate (MF-MA) solution on the tensile bond strength between acrylic denture teeth and auto-polymerized acrylic resin. MATERIALS AND METHODS. Seventy maxillary central incisor acrylic denture teeth for each of three different brands (Yamahachi New Ace; Major Dent; Cosmo HXL) were embedded with incisal edge downwards in auto-polymerized resin in polyethylene pipes and ground with silicone carbide paper on their ridge lap surfaces. The teeth of each brand were divided into seven groups (n=10): no surface treatment (control group), MF-MA solution at a ratio of 25:75 (v/v) for 15 seconds, 30 seconds, 60 seconds, 120 seconds, 180 seconds, and MMA for 180 seconds. Auto-polymerized acrylic resin (Unifast Trad) was applied to the ground surface and polymerized in a pressure cooker. A tensile strength test was performed with a universal testing machine. Statistical analysis of the results was performed using two-way analysis of variance (ANOVA) and post-hoc Dunnett T3 test (${\alpha}$=.05). RESULTS. The surface treatment groups had significantly higher mean tensile bond strengths compared with the control group (P<.05) when compared within the same brand. Among the surface treatment groups of each brand, there were no significantly different tensile bond strengths between the MF-MA groups and the MMA 180 second group (P>.05), except for the Yamahachi New Ace MF-MA 180-second group (P<.05). CONCLUSION. 15-second MF-MA solution can be an alternative chemical surface treatment for repairing a denture base and rebonding acrylic denture teeth with auto-polymerized acrylic resin, for both conventional and cross-linked teeth.
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Ticha Thongrakard,Chairat Wiwatwarrapan 대한치과보철학회 2016 The Journal of Advanced Prosthodontics Vol.8 No.4
PURPOSE This study evaluated the effect of chemical surface treatment using methyl formate-methyl acetate (MF-MA) solution on the tensile bond strength between acrylic denture teeth and auto-polymerized acrylic resin. MATERIALS AND METHODS Seventy maxillary central incisor acrylic denture teeth for each of three different brands (Yamahachi New Ace; Major Dent; Cosmo HXL) were embedded with incisal edge downwards in auto-polymerized resin in polyethylene pipes and ground with silicone carbide paper on their ridge lap surfaces. The teeth of each brand were divided into seven groups (n=10): no surface treatment (control group), MF-MA solution at a ratio of 25:75 (v/v) for 15 seconds, 30 seconds, 60 seconds, 120 seconds, 180 seconds, and MMA for 180 seconds. Auto-polymerized acrylic resin (Unifast Trad) was applied to the ground surface and polymerized in a pressure cooker. A tensile strength test was performed with a universal testing machine. Statistical analysis of the results was performed using two-way analysis of variance (ANOVA) and post-hoc Dunnett T3 test (α=.05). RESULTS The surface treatment groups had significantly higher mean tensile bond strengths compared with the control group (P<.05) when compared within the same brand. Among the surface treatment groups of each brand, there were no significantly different tensile bond strengths between the MF-MA groups and the MMA 180 second group (P>.05), except for the Yamahachi New Ace MF-MA 180-second group (P<.05). CONCLUSION 15-second MF-MA solution can be an alternative chemical surface treatment for repairing a denture base and rebonding acrylic denture teeth with auto-polymerized acrylic resin, for both conventional and cross-linked teeth.
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Effect of 4 Remineralizing Agents on in situ Incipient Proxiaml caries
C.trairatvorakul, D.Puangchaipruk, T.Thongrakard 대한임상예방치과학회 2010 International Journal of Clinical Preventive Denti Vol.6 No.1
Objective: To compare the remineralizing effect of resin modified glass ionomer (RMGI), glass ionomer (GI), 5,000 ppm NaF gel (NaF-gel) and caseinphosphopeptide amorphouscalciumfluorophosphate (CPP-ACFP) on artificial proximal carious lesion in situ. Methods: Two volunteers wore palatal appliances attached with 6 slabs, each consisted of 3, 1x1 mm2 windows on contralateral sides each serving as intraoral control and material applied groups, with original control slabs kept in deionized water. The appliance were immersed in 20% sucrose solution 8 times a day. Each material was randomly assigned to each 14 day-session. The appliances were worn in 4, 14 day-sessions with one week wash-out periods. The carious cross sectioned area was analyzed with Image-Pro plus program. Results: All the materials significantly reduced the lesion area comparing to control in descending order: RMGI, GI, NaF-gel and CPP-ACFP (p<0.05). Conclusion: The use of these remineralizing agents helped remineralizing the incipient lesion from 12-34%.
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Effect of 4 Remineralizing Agents on in situ Incipient Proximal Caries
C. Trairatvorakul,D. Puangchaipruk,T. Thongrakard 대한예방치과학회 2010 International Journal of Clinical Preventive Denti Vol.6 No.1
amorphouscalciumfluorophosphate (CPP-ACFP) on artificial proximal carious lesion in situ. Methods: Two volunteers wore palatal appliances attached with 6 slabs, each consisted of 3, 1x1 mm2 windows on contralateral sides each serving as intraoral control and material applied groups, with original control slabs kept in deionized water. The appliance were immersed in 20% sucrose solution 8 times a day. Each material was randomly assigned to each 14 day-session. The appliances were worn in 4, 14 day-sessions with one week wash-out periods. The carious cross sectioned area was analyzed with Image-Pro plus program. Results: All the materials significantly reduced the lesion area comparing to control in descending order: RMGI, GI, NaF-gel and CPP-ACFP (p<0.05). Conclusion: The use of these remineralizing agents helped remineralizing the incipient lesion from 12-34%.
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