Physical property comparison of 11 soft denture lining materials as a function of accelerated aging

Dootz, E.R.; Koran, A.; Craig, Robert G.

doi:10.1016/0022-3913(93)90250-r

Cited by 113 publications

(125 citation statements)

References 8 publications

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“…11,12,18,20,[24][25][26] In our study the effect of accelerated aging on the physical surface characteristics, ie, hardness and roughness of light-cured lingual retainer adhesives were examined. Although chemically cured materials are occasionally used for lingual retainer bonding, the hardness values of the chemically cured composites are considerably less than those of the light-cured ones.…”

Section: Discussionmentioning

confidence: 99%

Accelerated Aging Effects on Surface Hardness and Roughness of Lingual Retainer Adhesives

Ramoğlu

Üşümez²,

Büyükyılmaz

2008

The Angle Orthodontist

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Objective: To test the null hypothesis that accelerated aging has no effect on the surface microhardness and roughness of two light-cured lingual retainer adhesives. Materials and Methods: Ten samples of light-cured materials, Transbond Lingual Retainer (3M Unitek) and Light Cure Retainer (Reliance) were cured with a halogen light for 40 seconds. Vickers hardness and surface roughness were measured before and after accelerated aging of 300 hours in a weathering tester. Differences between mean values were analyzed for statistical significance using a t-test. The level of statistical significance was set at P Ͻ .05. Results:The mean Vickers hardness of Transbond Lingual Retainer was 62.8 Ϯ 3.5 and 79.6 Ϯ 4.9 before and after aging, respectively. The mean Vickers hardness of Light Cure Retainer was 40.3 Ϯ 2.6 and 58.3 Ϯ 4.3 before and after aging, respectively. Differences in both groups were statistically significant (P Ͻ .001). Following aging, mean surface roughness was changed from 0.039 m to 0.121 m and from 0.021 m to 0.031 m for Transbond Lingual Retainer and Light Cure Retainer, respectively. The roughening of Transbond Lingual Retainer with aging was statistically significant (P Ͻ .05), while the change in the surface roughness of Light Cure Retainer was not (P Ͼ .05). Conclusions: Accelerated aging significantly increased the surface microhardness of both lightcured retainer adhesives tested. It also significantly increased the surface roughness of the Transbond Lingual Retainer.

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Section: Discussionmentioning

confidence: 99%

Accelerated Aging Effects on Surface Hardness and Roughness of Lingual Retainer Adhesives

Ramoğlu

Üşümez²,

Büyükyılmaz

2008

The Angle Orthodontist

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“…When immersed in such solutions, plasticizers and other soluble components may leach out over extended periods (12)(13)(14)(15) while water or saliva are being absorbed (13,16). The loss of plasticizer may cause a decreased percentage of elongation and increased hardness values (17). Absorbed water has a detrimental effect on strength of resin denture base and physical and mechanical properties of the material (13,(17)(18)(19)(20).…”

Section: Introductionmentioning

confidence: 99%

“…The loss of plasticizer may cause a decreased percentage of elongation and increased hardness values (17). Absorbed water has a detrimental effect on strength of resin denture base and physical and mechanical properties of the material (13,(17)(18)(19)(20). The aim of this study was to evaluate sorption, solubility, hardness value, colour alteration effects on four different resin denture base materials after artificial saliva and nasal secretion storage over time.…”

Section: Introductionmentioning

confidence: 99%

Effects of saliva and nasal secretion on some physical properties of four different resin materials

Kurtulmuş¹,

Kümbüloğlu²,

Aktaş³

et al. 2010

Med Oral

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Objective: Aim of this study was to evaluate possible effects of saliva and nasal secretion on some physical properties, such as sorption, solubility, surface hardness and colour change on four different resin-based materials over a certain time period. Materials and Methods: A total of 128 disc-shaped specimens with a diameter of 50mm and thickness of 0.5mm were tested to evaluate sorption and solubility (ISO-1567). The specimens were stored in different solutions prior to testing. Surface hardness measurements were performed by using a Vickers hardness testing machine. A total of 20 cylindershaped test specimens with a diameter of 13 mm and thickness of 1 mm were prepared to evaluate colour change (ΔE). Analysis of variance was used to determine significant differences among groups. Paired t and Tukey Post-Hoc tests were performed to investigate significant differences among subgroups at all time intervals (p<0.05). Results: It was found that while the percentage absorption value at T7(7 days) of the auto-polymerizing (A) groups storaged in artificial saliva + nasal secretion were the highest (0.057±0.119), the percentage absorption value at T15(15 days) of the D groups storaged in artificial nasal secretion were the lowest (0.013±0.09). Besides, it was found that the percentage solubility value at T30(30 days) of visible ligth-cusing resin (VLC) groups storaged in artificial nasal secretion were the highest (0.016±0.003), and the percentage solubility value at T1(1 day) of the D groups storaged in distilled water were the lowest (0.01±0.02). While the highest hardness value was of T0(Dry) in group heat-polymerizing (H) (36.19±1.35), the lowest hardness value was of T0 in group D (9.83±2.48). When E values analysed for each group, VLC group showed the highest values (23.78±5.05) (p<0.05), group D showed the lowest values (9.06±2.82) in time (between the T0 and T30). Conclusion: The new polyamide resin was observed to show better physical properties when compared with other materials.

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“…Siendo así, el compromiso de la adhesión del reembasador a la resina acrílica es uno de los problemas más frecuentes verificados durante el uso de pró-tesis rebasadas y que es de gran relevancia clínica (35). Diversas metodologías se han aplicado para la evaluación de calidad de la adhesión de los reembasadores a la resina acrílica como las pruebas de re-sistencia a la tracción, al cizallamiento y al rasgado (23,24,28,30,36,37).…”

Section: Limitacionesunclassified

Propiedades de materiales resilientes para rebase de prótesis

Jon

Bail

Herrera

et al. 2014

Rev Estomatol Herediana.

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IntroducciónLa rehabilitación de pacientes edéntulos con prótesis total y/o pró-tesis parcial removible tiene como objetivo la preservación de los dientes remanentes y del reborde óseo, así como el reestablecimiento de la función masticatoria y estética. Sin embargo, la reabsorción del hueso alveolar es un proceso crónico e irreversible que, si no es controlado, podría generar desajustes en las bases acrílicas de las prótesis causando molestias al paciente y la incidencia de fuerzas horizontales nocivas sobre los dientes pilares, como sucede en los casos de prótesis parciales de extremo libre (1). Además, el desajuste en las bases puede favorecer la concentración de fuerzas en determinadas zonas del reborde, acelerando el proceso de reabsorción ósea (2).Viendo estos efectos, la adaptación de las bases acrílicas debe ser periódicamente controlada y si se encontrara un desajuste, estas pró-tesis deben ser readaptadas a los tejidos subyacentes. De esa forma, los pacientes deben asistir al consultorio periódicamente para la evaluación del tratamiento y para el rebase de sus prótesis.Una de las técnicas de rebase de estas prótesis es realizada en el propio consultorio usando materiales especialmente producidos para esta finalidad, los rebases directos. Este método denominado rebase inmediato puede ser utilizado con materiales rígidos o blandos, los cuales eliminan la fase de laboratorio donde se tiene que realizar el prensado para el rebase de la prótesis. Siendo por este motivo una técnica más simple, rápida y económica.La resina acrílica química o térmicamente activada es el material más utilizado para confeccionar las bases de prótesis removibles totales o parciales. Este material presenta varias características y propiedades deseables, como estética satisfactoria, buena resistencia, bajo costo y facilidad de manipulación (3). Sin embargo, por ser un material rígido puede causar incomodidad y lesiones a los tejidos bucales de algunos pacientes (4). Por estas razones, investigadores desarrollaron RESUMENLa presente revisión de literatura tiene por objetivo mostrar las principales características, ventajas y limitaciones de los rebases blandos con el fin de acercar su utilización al clínico general. Los materiales resilientes para rebase de prótesis han sido desenvueltos para minimizar las posibles molestias causadas por las bases de las prótesis en la mucosa. Estos materiales forman un grupo de materiales elásticos que llenan total o parcialmente la base de la prótesis, con la finalidad de disminuir el impacto de la fuerza masticatoria sobre la mucosa de revestimiento, pudiendo ser utilizados como material temporal o de un carácter más permanente. Los rebases blandos además de clasificarse según el tiempo de uso como provisionales (corta duración) o permanentes (larga duración), estos pueden ser divididos según la base del material: acrílico o silicona. Dentro de las indicaciones se encuentran la estabilización de prótesis después de cirugías, el condicionamiento de tejidos fibromucosos, el rebase de prótesis prov...

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Physical property comparison of 11 soft denture lining materials as a function of accelerated aging

Cited by 113 publications

References 8 publications

Accelerated Aging Effects on Surface Hardness and Roughness of Lingual Retainer Adhesives

Accelerated Aging Effects on Surface Hardness and Roughness of Lingual Retainer Adhesives

Effects of saliva and nasal secretion on some physical properties of four different resin materials

Propiedades de materiales resilientes para rebase de prótesis

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