Evaluation of Mechanical and Thermal Properties of Commonly Used Denture Base Resins

Phoenix, Rodney D.; Mansueto, Michael A.; Ackerman, Neal A.; Jones, Robert E.

doi:10.1111/j.1532-849x.2004.04002.x

Cited by 115 publications

(105 citation statements)

References 24 publications

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“…Since the introduction of POMs, there has been a continued interest in its use for PRDP applications [1, 10,20,37,48,61]. Chu considered it a simple and effective means of improving PRDP aesthetics [10].…”

Section: Thermoplastic Resins and Prdpsmentioning

confidence: 99%

Retentive forces and fatigue resistance of thermoplastic resin clasps

et al. 2012

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Section: Thermoplastic Resins and Prdpsmentioning

confidence: 99%

Retentive forces and fatigue resistance of thermoplastic resin clasps

et al. 2012

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“…It is known that the unreacted monomer may act as a plasticizer, thereby increasing the resilience 15 and decreasing the strength of the polymerized resin 16 . It may be concluded that color and the presence of nylon fibers in acrylic resins did not affect the properties analyzed in this study.…”

Section: Resultsmentioning

confidence: 99%

Influence of dye and nylon fibers on microwave-cured acrylic resin properties

Fortes

Collares

Leitune

et al. 2017

RGO, Rev. Gaúch. Odontol.

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Objective The aim of this study is to analyze if both color and nylon fibers have an influence on microwave-cured acrylic resin properties. MethodsRectangular and disk-shaped specimens were prepared using acrylic resins; medium pink with and without nylon fibers and colorless without nylon fibers. To obtain the rectangular specimens, a stainless steel die was used with the following dimensions: 64 X 10 x 3 mm (± 0.5mm RESUMO ObjetivoAnalisar se corantes e fibras de nylon influenciam nas propriedades de uma resina acrílica ativada por energia de micro-ondas. MétodosEspécimes retangulares e em forma de disco foram confeccionados em resina acrílica rosa médio com e sem fibras de nylon e incolor sem fibras. Para obter os espécimes retangulares, foi utilizada uma matriz de aço inoxidável com as seguintes dimensões: 64 X 10 X 3 (± 0,5mm) e para obter os espécimes em forma de disco, foi utilizada uma matriz com 50mm (± 0,5mm) de diâmetro e 0,5mm (±0,05mm) de espessura. Os mesmos foram randomizados para formar os grupos controle (acrílico incolor sem fibras) e experimentais (rosa médio com e sem fibras), sendo cada grupo composto por dez (10) espécimes retangulares e cinco (5) em forma de disco. Foram os mesmos então submetidos a seis (6) ensaios (resistência ao impacto izod, n=10; dureza knoop, n=10; temperatura de transição vítrea, n=3; sorção e solubilidade, n=5; grau de conversão, n=1; resistência à flexão e módulo de flexão, n=10). Todas as variáveis foram submetidas à análise de variância seguida pelo teste de comparações múltiplas de Tukey, com nível de significância de 5%.Resultados O grau de conversão foi de 88% para os 3 grupos de resinas e os resultados não mostraram diferença estatisticamente significativa entre os mesmos para cada variável (p>0,05). ConclusãoOs resultados mostraram que o corante e a presença de fibras de nylon em resina acrílica não afetaram as propriedades analisadas nesse estudo.

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“…A chest x-ray was taken for the nine specimens in different concentration of BaSO 4 and compared with an aluminum stepwedge; the aluminum was composed of nine steps and each step of the aluminum equal to 1mm and the specimens to be equal to 2 mm of the aluminum as a standard for radiographic evaluation. A light transmission densitometer was to measure the difference in the image density of all specimens which contain a different concentration of BaSO 4 nanoparticles in comparison with non-modified Acetal resin and aluminum step wedge.…”

Section: Evaluation the Radio-opacity Of Specimensmentioning

confidence: 99%

“…3 It is very strong, resists wear and fatigue, in addition to flexiblity, which makes it the best material for pre-formed clasps of partial denture, unilateral partial denture, provisional bridges, implant abutments, occlusal splints and orthodontic appliances. 4 Acetal resin and polymethyl methacrylate (PMMA) are radiolucent materials that cannot be seen using standard radiographic techniques. So in cases of accidental ingestion, aspiration traumatic impactions of the dental appliance, it is difficult to be detected and requires invasive procedures as advanced imaging techniques.…”

Section: Introductionmentioning

confidence: 99%

“…10 The study was carried out in attempt to modify Acetal resin flexible denture base materials. The ultimate aim was to obtain a radio-opaque Acetal resin denture base without loose of its flexibility by determining the least added concentration of BaSO 4 nanoparticles, and then evaluation of some mechanical and physical properties of both non-modified and modified material. Wax sprues prepared before place the upper half of the flask, major sprues with 6 -8mm diameter, minor sprues 2-4mm diameter, and attached to selected areas.…”

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The effect of addition of barium sulphate nanoparticles on some properties of Acetal resin

Ahmed

Hasan

2017

Zanco J Med Sci

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. IntroductionPatient needs a removable denture for the purpose of functional, psychological or financial. Construction of an esthetic removable denture with minimal display of conventional metal clasp makes a challenge to the dentist. 1 Continous research in polymer science has provided "Acetal resin" (Polyoxymethylene (POM)), which is made by the polymerization of formaldehyde and is a thermoplastic technopolymer with a monomer-free crystalline structure.2 Acetal resin is a thermoplastic and injection moulded resin. It has been used as alternative denture base and denture clasp material since 1986. It was used as a clasp material due to superior aesthetics which made the clasp match the shade of the abutment tooth.3 It is very strong, resists wear and fatigue, in addition to flexiblity, which makes it the best material for pre-formed clasps of partial denture, unilateral partial denture, provisional bridges, implant abutments, occlusal splints and orthodontic appliances.4 Acetal resin and polymethyl methacrylate (PMMA) are radiolucent materials that cannot be seen using standard radiographic techniques. So in cases of accidental ingestion, aspiration traumatic impactions of the dental appliance, it is difficult to be detected and requires invasive procedures as advanced imaging techniques. Delay in localizing or removing the foreign body may be harmful to the life. 5 Much research has been carried out to incorporate radio-opaque material such as metals, iodobenzene, polybarium acrylate and barium sulphate into the acrylic resin to fabricate a reasonable radio-opaque denture base material. 6 The effect of radiopaque material with the BaSO 4 was tested on the mechanical and physical properties of Background and objective: Acetal resin or polyoxymethylene is a flexible thermoplastic radiolucent denture base material. This study aimed to evaluate the addition of barium sulfate BaSO 4 nanoparticles on the mechanical and physical properties of acetal resin. Methods: Forty two specimens were prepared from both non-modified and modified acetal resin. The tested specimens were obtained by melt extrusion into the mold equipment followed by injection molding. The radio-opacity of non-modified and modified evaluated, and then some mechanical and physical properties tested. Results:The results of radio-opacity test showed that the radiographic density of BaSO 4 3% Acetal resin specimens was at the same level of 2mm thickness of the aluminum stepwedge. Non-significant decrease noted in surface roughness, creep in all strain regions, and compressive strength and modulus of elasticity. Conclusion: It has been concluded that the addition of 3% BaSO 4 nanoparticles produced an acceptable radio-opaque Acetal resin denture base material. Although the addition caused some changes in properties, the modified Acetal resin remained as a flexible thermoplastic material.

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Evaluation of Mechanical and Thermal Properties of Commonly Used Denture Base Resins

Cited by 115 publications

References 24 publications

Retentive forces and fatigue resistance of thermoplastic resin clasps

Retentive forces and fatigue resistance of thermoplastic resin clasps

Influence of dye and nylon fibers on microwave-cured acrylic resin properties

The effect of addition of barium sulphate nanoparticles on some properties of Acetal resin

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