Recent experiences with denture polymers

MacGregor, A.R.; Graham, James A.; Stafford, G.D.; Huggett, R

doi:10.1016/0300-5712(84)90049-6

Cited by 35 publications

(36 citation statements)

References 16 publications

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“…The findings were in agreement with those of Yunus et al [1], Stafford et al [12], MacGregor et al [18], and Kamaths [19]. In those studies, polyamide was found to be more flexible than PMMA denture base materials.…”

Section: Resultssupporting

confidence: 93%

A Comparative Study of Polyamide and PMMA Denture Base Biomaterials: I. Thermal, Mechanical, and Dynamic Mechanical Properties

Kürkçüoğlu

Köroğlu

Özkır

et al. 2012

International Journal of Polymeric Materials

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The fracture of denture base materials usually occurs due to accidental dropping and mishandling of these materials. Repeated fracture of denture base materials could be a problem for denture materials made of acrylic resins due to lack of toughness of PMMA-based denture materials. Use of a material with higher toughness might eliminate this problem. Properties of heat-polymerized poly(methyl methacrylate) (PMMA) and high-impact polyamide denture base biomaterials were compared. The test results showed that polyamide samples were more resilient and tougher. Polyamide biomaterials might be good candidate as an alternative to denture base PMMA materials for clinical situations of repeated fractures.

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Section: Resultssupporting

confidence: 93%

A Comparative Study of Polyamide and PMMA Denture Base Biomaterials: I. Thermal, Mechanical, and Dynamic Mechanical Properties

Kürkçüoğlu

Köroğlu

Özkır

et al. 2012

International Journal of Polymeric Materials

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“…Clinically, a loss of hydration results in an increase of rigidity. Such behaviour is found with polyamide probably due to the analogy of amide functional groups (Stafford et al, 1986;Mc Gregor et al, 1984). Mechanical modulus increases with hydration of oral mucosa (Inoue et al, 1985;Kydd et al, 1971;Kydd and Daly, 1982;Sloan et al, 1991).…”

Section: Discussionmentioning

confidence: 93%

Dynamic mechanical properties of oral mucosa: Comparison with polymeric soft denture liners

Lacoste-Ferré

Demont

Dandurand

et al. 2011

Journal of the Mechanical Behavior of Biomedical Materials

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The purpose of this work was to characterize the viscoelastic behaviour of oral mucosa and compare it with the dynamic mechanical properties of different soft liners. For this purpose, a sample of pig oral mucosa and six commercialized soft liner samples have been investigated. A comparison was also carried with the first suitable hard rubber for dental prosthetics: vulcanite. Creep recovery (CR) and dynamic mechanical analysis (DMA) have been used to determine the mechanical modulus of oral mucosa and soft liners respectively. The Poisson ratio is used to compare mucosa bulk modulus and soft liner shear modulus. The biomechanical concept of conventional complete dentures needs a good adjustment of dynamic mechanical impedance between the base and oral mucosa. The viscoelastic mechanical property of the oral mucosa as a referent biopolymer has been confirmed in vitro. The modulus value, adjusted for old patients in physiological conditions, is in the order of 3 MPa. This study underlines the plasticization effect of absorbed water on the mechanical properties of the underlying tissue. This study allows us to define some characteristics of the most adapted biomaterial according to the clinical exigency. The required biomaterial must display the following properties: compatibility and chemical resistance with biological environment perpetuated mechanical properties during physiological conditions and clinical use, good adjustment of dynamic mechanical impedance with supporting mucosa and easy sample processing.

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“…RPDs without metal clasps have been justified because metal clasps of conventional RPDs have poor esthetics, and metal allergies have been known to occur in certain situations [4,5]. Fatigue and fractures of metal clasps have also been a problem [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

The effect of cycling deflection on the injection-molded thermoplastic denture base resins

Hamanaka

Iwamoto

Lassila

et al. 2015

Acta Odontologica Scandinavica

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Recent experiences with denture polymers

Cited by 35 publications

References 16 publications

A Comparative Study of Polyamide and PMMA Denture Base Biomaterials: I. Thermal, Mechanical, and Dynamic Mechanical Properties

A Comparative Study of Polyamide and PMMA Denture Base Biomaterials: I. Thermal, Mechanical, and Dynamic Mechanical Properties

Dynamic mechanical properties of oral mucosa: Comparison with polymeric soft denture liners

The effect of cycling deflection on the injection-molded thermoplastic denture base resins

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