Mechanical properties of contemporary composite resins and their interrelations

Thomaidis, Socratis; Kakaboura, Afrodite; Müeller, Wolf-Dieter; Zinelis, Spiros

doi:10.1016/j.dental.2013.04.025

Cited by 64 publications

(47 citation statements)

References 45 publications

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“…Both HM and HV illustrated a strong correlation with E IT , a finding which is in accordance to previous research correlating Knoop and Brinnel hardness to elastic modulus of resin composites [14,18]. Elastic index showed a weak negative correlation to E IT denoting that the increase in modulus is achieved at an expense of ductility of the material.…”

Section: Discussionsupporting

confidence: 77%

Mechanical properties of contemporary orthodontic adhesives used for lingual fixed retention

Sifakakis

Zinelis

Patcas

et al. 2016

Biomedical Engineering / Biomedizinische Technik

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OBJECTIVE The aim of the present study was to test the mechanical properties of different adhesives used in orthodontics for fixed retainers and to investigate their possible interrelations. MA-TERIALS AND METHODS Specimens of six different adhesive resins were prepared: Transbond XT, Transbond LR and an experimental BPA-free orthodontic adhesive, as well as IPS Empress Direct (IPS-ED), ZNano and Accolade. The mechanical properties tested were Martens hardness (HM), indentation modulus (EIT), the ratio of elastic to total work, commonly known as elastic index ( IT) and Vickers hardness (HV). These properties were determined using instrumented indentation testing according to ISO 14577-2002. The results of the aforementioned properties were statistically compared with one-way ANOVA-test and Student-Newman-Keuls multiple comparison test at a=0.05, while possible correlations among the properties tested were analyzed by Pearson correlation. RESULTS Significant differences were identified among all the materials tested for HM, with Transbond LR presenting the highest value. This resin presented the highest EIT too. Significant EIT differences were identified among the materials and only ZNano and IPS-ED showed no significant differences for this property. Transbond LR and ZNano showed higher HV values. ZNano demonstrated the highest elastic index. Pearson analysis showed a strong positive correlation between HM and EIT (0.970), HM and HV (0.837), and EIT and HV (0.695), while a weak negative correlation was found between EIT and elastic index (-0.505). CONCLUSIONS The materials tested demonstrated significant differences in their mechanical properties, and thus differences in their clinical performance are anticipated. Abstract Objective: The aim of the present study was to test the mechanical properties of different adhesives used in orthodontics for fixed retainers and to investigate their possible interrelations. Materials and methods: Specimens of six different adhesive resins were prepared: Transbond XT, Transbond LR and an experimental BPA-free orthodontic adhesive, as well as IPS Empress Direct (IPS-ED), ZNano and Accolade. The mechanical properties tested were Martens hardness (HM), indentation modulus (E IT ), the ratio of elastic to total work, commonly known as elastic index (η IT ) and Vickers hardness (HV). These properties were determined using instrumented indentation testing according to ISO 14577-2002. The results of the aforementioned properties were statistically compared with one-way ANOVA-test and Student-Newman-Keuls multiple comparison test at a = 0.05, while possible correlations among the properties tested were analyzed by Pearson correlation. Results: Significant differences were identified among all the materials tested for HM, with Transbond LR presenting the highest value. This resin presented the highest E IT too. Significant E IT differences were identified among the materials and only ZNano and IPS-ED showed no significant differences for this property. Transbond LR and ZNa...

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Section: Discussionsupporting

confidence: 77%

Mechanical properties of contemporary orthodontic adhesives used for lingual fixed retention

Sifakakis

Zinelis

Patcas

et al. 2016

Biomedical Engineering / Biomedizinische Technik

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“…The properties of a composite resin also depend on the filler content, type of fillers and coupling efficiency of the particles (24). In the present study, although there was no statistical difference between the aged and not aged composites, such as mechanical properties, there was an interaction between the resin brands and the resin Z100, with higher amounts of inorganic particles, showed superior mechanical results.…”

Section: Discussioncontrasting

confidence: 40%

Microstructure and Mechanical Properties of Composite Resins Subjected to Accelerated Artificial Aging

et al. 2013

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The aim of this study was to investigate the influence of accelerated artificial aging (AAA) on the microstructure and mechanical properties of the Filtek Z250, Filtek Supreme, 4 Seasons, Herculite, P60, Tetric Ceram, Charisma and Filtek Z100. composite resins. The composites were characterized by Fourier-transform Infrared spectroscopy (FTIR) and thermal analyses (Differential Scanning Calorimetry -DSC and Thermogravimetry -TG). The microstructure of the materials was examined by scanning electron microscopy. Surface hardness and compressive strength data of the resins were recorded and the mean values were analyzed statistically by ANOVA and Tukey's test (α=0.05). The results showed significant differences among the commercial brands for surface hardness (F=86.74, p<0.0001) and compressive strength (F=40.31, p<0.0001), but AAA did not affect the properties (surface hardness: F=0.39, p=0.53; compressive strength: F=2.82, p=0.09) of any of the composite resins. FTIR, DSC and TG analyses showed that resin polymerization was complete, and there were no differences between the spectra and thermal curve profiles of the materials obtained before and after AAA. TG confirmed the absence of volatile compounds and evidenced good thermal stability up to 200 °C, and similar amounts of residues were found in all resins evaluated before and after AAA. The AAA treatment did not significantly affect resin surface. Therefore, regardless of the resin brand, AAA did not influence the microstructure or the mechanical properties.

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“…Resin composites are now commonly used for all types of restoration; however, they tend to be brittle and this shortcoming relates to a sensitivity to flaws and defects that increases susceptibility to catastrophic failure 1) . New formulations of resin composites are continually appearing on the market with different mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Fracture toughness of seven resin composites evaluated by three methods of mode I fracture toughness (<i>K</i><sub>Ic</sub>)

Meşe

Palamara

Bagheri

et al. 2016

Dental Materials Journal

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This study compared the fracture toughness values of seven resin composites and analyzed the consistency of data values using three methods: compact tension, three point and four point bending for Mode I failure. Seven resin composites were selected: Estellite Sigma Quick, Esthet X HD, Filtek Supreme XTE, Heliomolar, Ice, Rok, and Vit-l-escence. For each material, 18 specimens (n=6 for each test) were prepared. Maximum load to failure was recorded using a universal testing machine and fracture toughness was calculated. There was a direct significant correlation among all tested methods. Rok showed the highest and Estelite the lowest KIc values. SEM of the fractured surface of compact tension method showed propagation of the cracks from stresses concentrating at the corner of the notch and the surface of the sample. Four-point test gave the largest range in KIc and was a simple method to discriminate between the resin composite values of KIc.

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Mechanical properties of contemporary composite resins and their interrelations

Cited by 64 publications

References 45 publications

Mechanical properties of contemporary orthodontic adhesives used for lingual fixed retention

Mechanical properties of contemporary orthodontic adhesives used for lingual fixed retention

Microstructure and Mechanical Properties of Composite Resins Subjected to Accelerated Artificial Aging

Fracture toughness of seven resin composites evaluated by three methods of mode I fracture toughness (<i>K</i><sub>Ic</sub>)

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