Dimensional stability of dentures processed in boilable acrylic resins: A comparative study

Polyzois, Gregory; Karkazis, Hercules C.; Zissis, A; P, Demetriou

doi:10.1016/0022-3913(87)90351-9

Cited by 28 publications

(31 citation statements)

References 20 publications

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“…These polymers are reinforced with butadiene-styrene rubber and the rubber particles are grafted to methyl methacrylate to bond to the acrylic matrix 5) . Highimpact denture base resins have been investigated [6][7][8][9][10][11] . The ultimate flexural strength 8,9,11) , elastic modulus 6,8,9) and impact strength 6,[8][9][10][11] of these high-impact denture base resins were studied.…”

Section: Introductionmentioning

confidence: 99%

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Effect of long-term water immersion or thermal shock on mechanical properties of high-impact acrylic denture base resins

Sasaki

Hamanaka

Takahashi

et al. 2016

Dental Materials Journal

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The purpose of this study was to investigate the effect of long-term water immersion or thermal shock on the mechanical properties of high-impact acrylic denture base resins. Two high-impact acrylic denture base resins were selected for the study. Specimens of each denture base material tested were fabricated according to the manufacturers' instructions (n=10). The flexural strength at the proportional limit, the elastic modulus and the impact strength of the specimens were evaluated. The flexural strength at the proportional limit of the high-impact acrylic denture base resins did not change after six months' water immersion or thermocycling 50,000 times. The elastic moduli of the high-impact acrylic denture base resins significantly increased after six months' water immersion or thermocycling 50,000 times. The impact strengths of the high-impact acrylic denture base resins significantly decreased after water immersion or thermocycling as described above.

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Section: Introductionmentioning

confidence: 99%

“…The ultimate flexural strength 8,9,11) , elastic modulus 6,8,9) and impact strength 6,[8][9][10][11] of these high-impact denture base resins were studied. Their dimensional stability 7) was also examined. Removable denture base resins typically exhibit considerable plastic deformation before fracture.…”

Section: Introductionmentioning

confidence: 99%

Effect of long-term water immersion or thermal shock on mechanical properties of high-impact acrylic denture base resins

Sasaki

Hamanaka

Takahashi

et al. 2016

Dental Materials Journal

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“…Since the development of acrylic resin, researchers have been continually improving the characteristics of the physical properties of the material, and introducing variations in the polymerisation procedure. As an alternative to conventional polymerisation in a hot water bath, other techniques such as the use of microwave energy 8 , dry heat 9 , boiling water 10 and visible light 11 have been suggested. Although these other methods have been introduced into the polymerisation procedure, it has been reported that the most effective polymerisation cycle can be accomplished in a water bath by raising the temperature to at least 65°C for 9 h 12 .…”

Section: Introductionmentioning

confidence: 99%

Dimensional accuracy of upper complete denture bases: the effect of metallic flask closure methods

2009

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“…Araştırmalarda, referans noktaları arasın-daki lineer ölçüm değerlendirilmeleri dijital kumpas, mikrometreli mikroskop ve radyografi gibi çeşitli alet ve yöntemler ile yapılmaktadır (8)(9)(10)(11)(12)(13). Ancak değişik ölçüm yöntemlerini kullanan araştırmacılar bu konuda önemli olanın ölçümün hassasiyeti olduğunu bildirmektedir (10,11).…”

Section: Discussionunclassified

Maksiller tam protezin boyutsal hassasiyeti üzerinde işlememenin etkisi

KARAAĞAÇLIOĞLU¹

2010

Ankara Üniversitesi Diş Hekimliği Fakültesi Dergisi

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The aim of this study was to evaluate the linear dimensional changes of conventional heatpolymerized acrylic resin during the processing stages. Metal pins were placed into the central fossae of the right and left first premolars and molars and cingulum area of the right central tooth on tooth aran gement stage. Anteroposterior and tranvers lenght measurements between reference points were done by using a digital calliper (Mitutoyo, Japan) by three investigators at different times. Measurements were performed after try-in (control), processing, polishing stages and storage in water for one month. Comparison of the rate of the changes for the stages according to the control group and between the stages were performed by 'repeated measures analysis of variance' (ANOVA).Results showed a decrease in anteroposterior measurements after processing and polishing stages with regard to the control group. The increase in the values with regard to the initially decreasing measurements in the samples stored in water for 1 month was not found statistically significant (p>0.05). Besides, it was observed that this increase was not proportional to the dimensional reduction. However, statistically significant differences were only determined in the processing stage with regard to the control group in the transvers measurements (p<0.05). Bulgular, anteroposterior ölçümlerde kontrol grubuna göre mufla içerisinde polimerizasyon ve polisaj sonrası azalma olduğunu gösterdi. Başlan-gıç ölçümüne göre azalan değerlerin 1 ay suda bekletilen örneklerde artış göstermesi istatistiksel olarak anlamlı bulunmadı (p>0.05). Aynı zamanda bu artışın azalma ile orantılı olmadığı da göz-lendi. Oysaki, transvers boyut ölçümlerinde sadece kontrol grubuna göre mufla içerisinde polimerizasyon sonrasında istatistiki olarak anlamlı sonuçlar belirlendi (p<0.05). Key

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Dimensional stability of dentures processed in boilable acrylic resins: A comparative study

Cited by 28 publications

References 20 publications

Effect of long-term water immersion or thermal shock on mechanical properties of high-impact acrylic denture base resins

Effect of long-term water immersion or thermal shock on mechanical properties of high-impact acrylic denture base resins

Dimensional accuracy of upper complete denture bases: the effect of metallic flask closure methods

Maksiller tam protezin boyutsal hassasiyeti üzerinde işlememenin etkisi

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