The Effects of Different Investment Materials on Dimensional Accuracy and Surface Roughness of ThermoSens Maxillary Complete Dentures

Hamad, Thekra Ismael; Fatihallah, Abdalbasit A.; Abdulsahib, Ali J.

doi:10.12816/0015026

Cited by 4 publications

(4 citation statements)

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“…9 The flexibility of this material can be controlled at the time of manufacture, and its shrinkage is relatively small. 5 This thermoplastic material has a good biocompatibility level, high strength, and very low shrinkage. 10 Besides the density level is high so the liquid cannot penetrate this material, thereby preventing yellow or brown discolouration.…”

Section: Discussionmentioning

confidence: 99%

“…When denture users smoke, dentures will be exposed to several substances that can affect their dentures, including carbon monoxide, formaldehyde, radioactive polonium, ammonia, nickel, arsenic, nicotine, tar, and heavy metals such as cadmium and lead. 5 Some previous research states that cigarette smoke can affect the colour and surface roughness of the composites, artificially acrylic teeth on various other dentures. The factor of surface roughness level of suitable denture base is very significant to be studied because it is a place for accumulation of microorganisms, thus increasing the level of stain in dentures.…”

Section: Introductionmentioning

confidence: 99%

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Discolouration of polyamide microcrystalline denture base plates after exposure to filter cigarette smoke

Jubhari¹,

Dangkeng²,

Dangkeng³

2019

Padjadjaran J Dent

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Introduction: Denture users with smoking habit often complain about colour changes in their dentures, especially on the base part. Polyamide microcrystalline is a thermoplastic denture base material and does not undergo many colour changes. The purpose of this study was to analyse the effect of filter cigarettes smoke exposure on the colour of polyamide microcrystalline materials. Methods: This study used posttest only control group design — Plate-Shaped sample with a size of 2 x 2 x 0.5 cm3. Nine samples as controls were immersed without exposure to the cigarette smoke, and 9 samples were immersed in artificial saliva with exposure to the filter cigarette smoke by six cycles, where one cycle was in the form of smoke exposure from one cigarette at 30-minute intervals. Cigarette exposure lasts for 21 days using a smoking simulation tool. Every seven days of exposure, colours were evaluated using a DSLR camera. The photos were then analysed with Adobe™ Photoshop in the CIELab colour space. The results were analysed afterwards by a one-way ANOVA variant test, and advance difference tests were analysed using a Post-Hoc test. Results: There was a significant colour change after exposure (p < 0.05), but the control group did not experience discolouration. The highest rate of colour change occurred in the second week, while in the third week the colour changes still occurred but tend to be stable. Conclusion: Exposure to the filter cigarette smoke changes the colour of polyamide microcrystalline denture base.Keywords: Polyamide microcrystalline, filter cigarette smoke, discolouration, denture base

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Discolouration of polyamide microcrystalline denture base plates after exposure to filter cigarette smoke

Jubhari¹,

Dangkeng²,

Dangkeng³

2019

Padjadjaran J Dent

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“…Breflex (Thermoplastic) samples were fabricated on the report of the manufacturer's directives using the thermopress injection molding system (Vertex™ ThermoJect22). The material injected with a pressure of 110 psi at 280° C. for 20miutes (21) . The samples from heat cured acrylic were constructed on the report of manufacturer' instructions using a compression molding (trial-pack) technique and curing of PMMA acrylic resin performed in water bath at 70°C for7-9 hours followed by 100°C for 30 minutes.…”

Section: Samples Preparation For Colour Stability and Transverse Strength Testmentioning

confidence: 99%

Evaluation and Comparison of the Influence of Microwave as a Disinfectant Method on the Colour Stability, Mechanical and Physical Properties of Thermoplastic (Breflex) and Acrylic Resins Denture Base Material

Matar

El-Sharkawy

2019

Egyptian Dental Journal

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Microwave radiation has been used for sterilization and disinfection of dental prosthesis which considered as an alternate method for chemical disinfectants.Aim: to evaluate the influence of microwave as a disinfection procedure on the colour ,the transverse strength and dimensional stability on the thermoplastic resin denture base and compare it with two types of conventional acrylic resin at different exposure times Material and methods: 180 samples were made, 60 for each of the next tests (colour, transverse strength and dimensional stability) .The samples of each test, were subdivided into three groups each group has 20 samples according to the denture base material used (Breflex thermoplastic resin, heat cure and self cure). Each test were divided into four groups, one control and the other groups according to the time of microwave disinfection that were utilized (5,10,15 minutes) at 650 watt. Colour, transverse strength and dimensional stability parameters were measured with and without disinfection. Data were analyzed with ANOVA and Post-hoc Tukey's tests with statistically significant at p ≤ 0.05 . Result:Microwave disinfection had no significant influence on the colour, the transverse strength beside the dimensional changes of all denture base materials at all the disinfection intervals, except it has a significant influence on the colour of heat cure for 15 minutes. Breflex showed a significantly increase in the flexural strength also, improvement in its fitness to the casts when compared with both heat and self cured resins after treated with microwave. Conclusion:Microwave can be used safely for disinfection of all the denture base material except heat cure for 15 minutes. Breflex is the best due to it has no influence on its colour , increase the flexural strength, as well as dimensionally stable when compared with both heat and self cured acrylic resins

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“…Owing to its composition, a homogenous color can be achieved, making this material suitable for the preparation of full dentures. [13] In present study, the most important physico-mechanical properties were made to compare between the polyamide based denture base material (Vertex™ ThermoSens , Vertex-Dental B.V. The Netherlands) as and conventional poly methyl methacrylate resin PMMA (Acrostone, Egypt) and test the hypothesis that those properties could be affected by thermocycling.…”

Section: Introductionmentioning

confidence: 99%

Laboratory Evaluation of Newly Formulated Thermoplastic Resin Complete Denture Base Materials

2016

IJSR

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Aim of the work: To investigate the physic-mechanical properties of newly formulated thermoplastic denture base material. Materials and Methods: Two parallel groups according to the denture base material used Group (A) conventional heat cure acrylic resin i .e. control group, Group (B)Vertex thermosens i.e. test group, 35 specimens each (14 impact, 14 flexural and 7warpage)will be examined in this study. Each group will be divided into 2 subgroups: (I) No Thermocycling and (II) Thermocycling then subjected to 3 different tests, Impact strength, flexural strength and warpage. Results and Conclusions: 1.The vertex thermosens denture base material exhibited significantly higher impact and flexural strength as compared with conventional PMMA.2.There was significant increase in impact strength of vertex thermosens and non statistically significant of flexural strength of both groups after thermocycling.3.Warpage of vertex thermosens was statistically significant higher than conventional PMMA.4.There was a significant increase of warpage after thermocycling for both groups.

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The Effects of Different Investment Materials on Dimensional Accuracy and Surface Roughness of ThermoSens Maxillary Complete Dentures

Cited by 4 publications

References 0 publications

Discolouration of polyamide microcrystalline denture base plates after exposure to filter cigarette smoke

Discolouration of polyamide microcrystalline denture base plates after exposure to filter cigarette smoke

Evaluation and Comparison of the Influence of Microwave as a Disinfectant Method on the Colour Stability, Mechanical and Physical Properties of Thermoplastic (Breflex) and Acrylic Resins Denture Base Material

Laboratory Evaluation of Newly Formulated Thermoplastic Resin Complete Denture Base Materials

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