The effects of environment and cyclic fatigue on the mechanical properties of an indirect composite

Hurley, Ryan K.; Drummond, James L.; Viana, Grace; Galang, Maria Therese S

doi:10.1016/j.jdent.2012.05.012

Cited by 7 publications

(7 citation statements)

References 21 publications

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“…It can also show that high dental problems in parents may affect their consideration to hygienic behaviors of their children; so, healthy parents are more likely to have children with lower plaque index than unhealthy parents. This finding confirms the previous study findings [17]. …”

Section: Discussionsupporting

confidence: 94%

“…This confirms the previous studies results which have reported that parents with higher education have more positive attitudes and stronger intentions to control children's health behavior than low-educated parents [17]. In a study by Abiola Adeniyi et al, a significant relationship was reported between mothers' educational level and the oral hygiene status of their children [16].…”

Section: Discussionsupporting

confidence: 88%

“…Since parents are the primary social force influencing child development in the early childhood years, it seems that interventions targeting parental oral health beliefs and practices may be beneficial in the prevention of oral health problems such as dental caries [17]. …”

Section: Discussionmentioning

confidence: 99%

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Oral Health Behavior of Parents as a Predictor of Oral Health Status of Their Children

2013

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Introduction. It is widely acknowledged that the behavior of parents affects their children's health. This study aimed to evaluate the relationship between oral health behavior of parents and oral health status and behavior of their children in a sample of preschool children in Iran. Method and Material. A random sample of over-five-year-old preschool children and their parents were enrolled in the study. Selection of schools was by clustering method. Parents were asked to fill a piloted questionnaire which included demographic characteristics, socioeconomic status, oral health behaviors of children and their parents. Oral health status of children was examined. The parent and their children oral health relationship were tested using regression and correlation analysis. Results. About 222 parents and children participated in the study. There was a significant relationship between history of having dental problems in parents and dmft index in their children (P = 0.01). There was a significant relationship between parental frequency of tooth brushing and child frequency of tooth brushing (P = 0.05); however, there was no significant relationship between parental frequency of dental visits and those of their children (P = 0.1). Conclusion. The study concluded that some important health behaviors in parents, such as tooth brushing habits are important determinants of these behaviors in their young children. So promoting parent knowledge and attitude could affect their children oral health behavior and status.

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Section: Discussionsupporting

confidence: 94%

Section: Discussionsupporting

confidence: 88%

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Oral Health Behavior of Parents as a Predictor of Oral Health Status of Their Children

2013

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“…Moreover, acidic environment makes the surface of the composites rougher [14]. Many studies evaluated mechanical properties of composites [15, 16]. However, there are no studies about the change of flexural strength and elastic modulus of composite resins after exposure to acidic drinks.…”

Section: Introductionmentioning

confidence: 99%

Flexural Properties and Elastic Modulus of Different Esthetic Restorative Materials: Evaluation after Exposure to Acidic Drink

Scribante

Bollardi

Chiesa

et al. 2019

BioMed Research International

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Background. Acidic beverages, such as soft drinks, can produce erosion of resin composites. The purpose of the present study was to investigate mechanical properties of different esthetic restorative materials after exposure to acidic drink. Methods. Nine different composites were tested: nanofilled (Filtek Supreme XTE, 3M ESPE), microfilled hybrid (G-ænial, GC Corporation), nanohybrid Ormocer (Admira Fusion, Voco), microfilled (Gradia Direct, GC Corporation), microfilled hybrid (Essentia, GC Corporation), nanoceramic (Ceram.X Universal, Dentsply De Trey), supranano spherical hybrid (Estelite Asteria, Tokuyama Dental Corporation), flowable microfilled hybrid (Gradia Direct Flo, GC Corporation), and bulk fill flowable (SureFil SDR flow, Dentsply De Trey). Thirty specimens of each esthetic restorative material were divided into 3 subgroups (n=10): specimens of subgroup 1 were used as control, specimens of subgroup 2 were immersed in 50 ml of Coca Cola for 1 week, and specimens of subgroup 3 were immersed in 50 ml of Coca Cola for 1 month. Flexural strength and elastic modulus were measured for each material with an Instron Universal Testing Machine. Data were submitted to statistical analysis. Results. After distilled water immersion, nanofilled composite showed the highest value of both flexural strength and elastic modulus, but its flexural values decreased after acidic drink immersion. No significant differences were reported between distilled water and acidic drink immersion for all other materials tested both for flexural and for elastic modulus values. Conclusions. Even if nanofilled composite showed highest results, acidic drink immersion significantly reduced flexural values.

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“…[16][17][18][19] Many early studies focused on material loss due to fatigue and wear caused by mechanical forces. 16,[20][21][22][23][24][25][26][27][28][29] More Correspondence to: K. J. Rockne; e-mail: krockne@uic.edu recent research investigated the effect of adding various fillers and additives to the dental resin composite to determine the effect on their overall material properties like compressive strength and durability. [30][31][32][33] Two key factors impacting the magnitude of the environmental degradation of restorative materials is the incubation temperature and duration of aging.…”

Section: Introductionmentioning

confidence: 99%

The effect of esterase enzyme on aging dental composites

Oskoe

Drummond²,

Rockne

2019

J Biomed Mater Res

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We measured the push-out and diametral tensile strength of dental restorative composites following aging under environmental conditions relevant to the oral cavity; air (A), artificial saliva (AS), acidified (50 mM CH 3 COOH, pH = 4.7) artificial saliva (AS + HAc), and AS with esterase enzyme (AS + ENZ). Cylindrical test specimens (6.3 mm diameter by 5.1 mm long) were prepared by placing 0.3 g of nanofilled composite in an epoxy ring and cured. Twenty samples were aged in each environment for 163-186 days at 37 C. The push-out strengths (mean AE standard error of the mean [SEM], in MPa) for specimens were: A-2.4 AE 0.2, AS-7.3 AE 0.5, AS + HAc-7.2 AE 0.9, and AS + ENZ-6.0 AE 0.6. Following the push-out test, the diametral tensile strength and elasticity were immediately determined. The diametral tensile strengths (mean AE SEM, in MPa) for specimens were: A-54.0 AE 1.6, AS-31.4 AE 1.3, AS + HAc-34.3 AE 1.2, and AS + ENZ-22.5 AE 0.7. The push-out strength was lowest for the A environment due to shrinkage of the composite. The push-out strength increased significantly as water diffused into the specimens (AS and AS + HAc) but decreased significantly in the enzyme environment (AS + ENZ). The diametral tensile strength was highest for specimens in the A environment, which was significantly higher than both the AS and AS + HAc specimens and > 2× higher than the AS + ENZ specimens. The results indicated that a water environment (with or without acid) caused a significant decrease in the mechanical properties of this composite, but the greatest decrease was seen in water with esterase. This is the first study to demonstrate that esterase enzymes affect the bulk strength of a commonly used commercial dental composite.

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The effects of environment and cyclic fatigue on the mechanical properties of an indirect composite

Cited by 7 publications

References 21 publications

Oral Health Behavior of Parents as a Predictor of Oral Health Status of Their Children

Oral Health Behavior of Parents as a Predictor of Oral Health Status of Their Children

Flexural Properties and Elastic Modulus of Different Esthetic Restorative Materials: Evaluation after Exposure to Acidic Drink

The effect of esterase enzyme on aging dental composites

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