Evaluation of fracture toughness of a fiber containing dental composite after flexural fatigue

Drummond, James L.; Lin, Lihong; Miescke, Klaus J.

doi:10.1016/j.dental.2003.11.005

Cited by 25 publications

(20 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In terms of fracture toughness, K IC , specimens aged in the 50/50 mixture of ethanol and water displayed the lowest values. The decrease in the fracture toughness following aging in the 50/50 mixture is attributed to the breakdown of the resin and/or a deterioration of the silane bond between the filler particles and the resin [4]. An interesting finding was the fracture toughness of BelleGlass HP aged in air showed the highest value at all four predetermined cycle levels compare to the remaining three media, whereas the fracture toughness of Micronew and Filtek Supreme Plus in air showed a lower value compare to those aged in water at 1, 1,000 cycle levels and at 100,000 cycle level respectively.…”

Section: Discussionmentioning

confidence: 99%

“…A 1.00 mm notch was chosen for Micronew as a continuation of a previous study, that used a fiber reinforced dental composite, which has high flexure strength [4]. Only after the Micronew samples were prepared was it realized that Micronew was very weak, and a 0.75mm notch later on was decided to be used for the other specimens.…”

Section: Methodsmentioning

confidence: 99%

“…These materials are subjected to mastication forces that are low and repetitive (fatigue) with the concern that the reported fatigue behavior of resin composites does not correlate with initial strength values, and materials providing high initial strengths may not reveal the best fatigue resistance [3,4]. …”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Cyclic loading of notched dental composite specimens

Lin

Drummond

2010

Dental Materials

Self Cite

View full text Add to dashboard Cite

Objective The purpose of this study was to examine the fracture toughness (KIC) of three direct dental composites and one indirect dental composite subject to cyclic loading. Methods The composites were a micro-filled (Micronew, Bisco INC., Schaumburg, IL, USA), a hybrid (Renew, Bisco INC.), a nano-filled composite (Filtek Supreme Plus, 3M ESPE, St. Paul, MN, USA) and an indirect dental composite (BelleGlass HP, SDS-Kerr, Orange, CA, USA). Rectangular bar specimens (3mm x 3mm x 25 mm) were fabricated, notched, aged (five months) and cyclic loaded in four different environments, air, water, artificial saliva, and a 50/50 by volume mixture of ethanol and water. Specimens were cyclic loaded for 1, 1,000, 10,000, and 100,000 cycles. Results A three-way ANOVA (non-aged and aged group, four aging media, four loading cycles) showed a significant difference between non-aged and aged, aging media, and loading cycles. For the control groups as the number of cycles increased, there were no significant differences on the number of cycles completed and fracture toughness, except for Micronew, which showed an increased specimen failure rate and decreased fracture toughness. In the aged groups, cyclic loading in water and artificial saliva did not have a significant effect on BelleGlass HP, Filtek Supreme Plus and Renew for fracture toughness and the number of cycles completed, However for Renew in the 50/50 mixture at 100,000 cycles, Filtek Supreme Plus in air and the 50/50 mixture, and Micronew, there was an increased specimen failure rate and a decreased fracture toughness during cyclic fatigue loading as the number of cycles increased. Significance BelleGlass HP displayed the best overall resistance to cyclic loading, followed by Renew and Filtek Supreme Plus, and Micronew.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Cyclic loading of notched dental composite specimens

Lin

Drummond

2010

Dental Materials

Self Cite

View full text Add to dashboard Cite

show abstract

“…The success of Restolux in resisting fatigue is due to the rather large size, at least for dental composites, of the fiber filler, but eventually a decrease in flexure strength occurs from separation of the fiber filler from the resin matrix. 21 Other studies have shown that flexure loading for Restolux results in a lower flexure strength following cycling compared to contact cyclic loading. 22 Another factor is the additional processing of BelleGlass and Tescera that according to some studies 9,23 (unaged specimens only) which results in a higher degree of cure of the resin matrix and a reduction in the porosity of the composite leading to an improvement in mechanical properties.…”

Section: Compositementioning

confidence: 98%

Fatigue behaviour of dental composite materials

Drummond

Lin

Al-Turki

et al. 2009

Journal of Dentistry

Self Cite

View full text Add to dashboard Cite

“…Notwithstanding, light-cured restorative composites containing randomly oriented low aspect ratio glass fibers as part of their reinforcing phase became commercially available in 1990s. One of them (Restolux, Lee Pharmaceutical, South El Monte, CA, USA), no longer available, had 52 wt% of fibers (80-120 m in lenght, aspect ratio: 5) and a total filler content of 85 wt% [7]. The second one (ALERT, Pentron, Orange, CA, USA) has 62 vol% of filler, including glass fibers 20-50 m in length and 6 m in diameter [8].…”

Section: Introductionmentioning

confidence: 99%