Wear of resin composites: Current insights into underlying mechanisms, evaluation methods and influential factors

Tsujimoto, Akimasa; Barkmeier, Wayne W.; Fischer, Nicholas G.; Nojiri, Kie; Nagura, Yuko; Takamizawa, Toshiki; Latta, Mark; Miazaki, Masashi

doi:10.1016/j.jdsr.2017.11.002

Cited by 103 publications

(79 citation statements)

References 110 publications

(129 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Occlusal wear only concerns contact surfaces while tooth brushing abrasion can affect any exposed surface [41]. The abrasive composites wear was the subject of many studies and it is influenced by different factors, such as the size, shape, and the amount of filler, the resin matrix, and the bonding between the two phases [26]. In addition, the abrasive surface has an important role: its hardness is directly linked with the abrasion amount [42].…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Glass Fiber Reinforced Composite Orthodontic Retainer: In Vitro Effect of Tooth Brushing on the Surface Wear and Mechanical Properties

et al. 2020

View full text Add to dashboard Cite

Fiber reinforced composites (FRCs) are metal free materials that have many applications in dentistry. In clinical orthodontics, they are used as retainers after active treatment in order to avoid relapse. However, although the modulus of the elasticity of FRCs is low, the rigidity of the material in the form of a relatively thick retainer with a surface cover of a flowable resin composite is known to have higher structural rigidity than stainless steel splints. The aim of the present study is to measure load and bending stress of stainless steel wires, as well as flowable resin composite covered and spot-bonded FRC retainer materials after tooth brushing. These materials were tested with a three point bending test for three different conditions: no brushing, 26 min of brushing, and 60 min of brushing. SEM images were taken before and after different times of tooth brushing. Results showed that stainless steel was not significantly affected by tooth brushing. On the other hand, a significant reduction of values at maximum load at fracture was reported for both FRC groups, and uncovered FRCs were most affected. Concerning maximum bending stress, no significant reduction by pretreatment conditions was reported for the materials tested. SEM images showed no evident wear for stainless steel. Flowable resin composite covered FRCs showed some signs of composite wear, whereas spot-bonded FRCs, i.e., without the surface cover of a flowable resin composite, showed signs of wear on the FRC and exposed glass fibers from the FRC’s polymer matrix. Because of the significant changes of the reduction of maximum load values and the wear for spot-bonded FRCs, this technique needs further in vitro and in vivo tests before it can be performed routinely in clinical practice.

show abstract

Section: Discussionmentioning

confidence: 99%

“…Wear is defined as the progressive loss of substance. It depends on the material type and geometry, on the interactions (stresses and forces), and on the environmental conditions (temperature, chemistry) [26].…”

Section: Introductionmentioning

confidence: 99%

Glass Fiber Reinforced Composite Orthodontic Retainer: In Vitro Effect of Tooth Brushing on the Surface Wear and Mechanical Properties

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Amalgam has been in use for over two centuries, with a long history of being a safe, durable and affordable restorative material. It comprised 70% of restorations placed to restore carious teeth until recent years when resin composites and other adhesive restorative materials became more available and predictable in their performance. The decline in the use of amalgam is motivated by the steady increase in demand for aesthetic restorations by patients.…”

Section: Introductionmentioning

confidence: 99%

Amalgam phase down: baseline data preceding implementation in Nigeria

Umesi

Oremosu

Makanjuola

2020

International Dental Journal

View full text Add to dashboard Cite

Objective: The Minimata Convention on mercury includes amalgam phase-down and eventual phase-out from dentistry. To aid its subsequent evaluation it is important to have baseline data of amalgam use in a locality prior to implementing a phase-down. Methodology: Records of patients spanning 5 years from January 2011 to January 2016 were analysed to determine and the compare frequency of amalgam usage with other dental materials for carious teeth restorations in a Nigerian university teaching hospital. Classes of cavities restored and cadres of operators who employed the different materials were included. Institutional ethics committee approval was obtained prior to commencing the study. Results: 2,058 patients' records were retrieved, 59% females and 41% males. Their ages ranged 19-80 years, mean 33.5 AE 12.7 years, young adults 20-39 years old were the majority (62.9%). Filling materials included 57.5% amalgam, 17.6% glass ionomer cement (GIC) and 24.9% resin composite. Class I restorations constituted 70.5% of amalgam restorations, while Class II restorations made up 29.4% and Class V restorations accounted for 0.1%. Undergraduate dental students placed most of the amalgam restorations (60.5%), and 78.9% of all their restorations were amalgam. Less experienced dentists used all materials equally; the more experienced dentists placed more composite resin and GIC (43.3%). Conclusion: Amalgam fillings constituted nearly 60% of the restorations of carious teeth. Training of dental students in placement of non-mercury alternatives to amalgam and Minimum Intervention Dentistry needs to be emphasized in dental schools. Phase-down of amalgam should be intensified in Nigeria with the ultimate aim of a phase-out in line with the Minamata Convention.

show abstract

“…Those that migrate to peripheral tissues, when interacting with these tissue, can cause loosening of the implant, forcing its removal [18 -22]. Development of composites is one of the methods used to improve the wear resistance of polymeric materials [18]. Different type of fillers such as alumina [23], graphite, molybdenum disulfide, [24]; carbon nanofibers and nanotubes [25,26] have been added to biopolymers.…”

Section: Introductionmentioning

confidence: 99%

Niobium oxide (NB2O5) filled high modulus polyethylene extrudable (HMPEX) composites: tensile properties

Pinto¹,

Acevedo²,

Rocha³

2018

Proceedings of the 4th Brazilian Conference on Composite Materials

View full text Add to dashboard Cite

The present study reports the development of composites of high-modulus polyethylene extrudable (HMPEX) filled with niobium oxide (Nb2O5) for using in therapeutic applications. The effect of filler content on mechanical properties of composites processed with Nb2O5 contents in the range of 5-30 wt% was evaluated. Tensile strength tests were performed according to ASTM D 638. The tensile modulus values of composites increased significantly at high filler contents (15, 20, 25 and 30 wt%), where the modulus increased 18, 16, 14 and 24%, respectively, compared with the modulus of neat HMPEX. The yield strength showed slight improvement with the increase of filler content up to 20 wt%. At this concentration, it reached the maximum value, 10% higher than the value of HMPEX. The values of elongation at break and tensile strength decreased with the increase in filler content. All properties presented by the composites processed by extrusion were inferior to those of the composites prepared by compression molding. The neat HMPEX and the HMPEX composites processed with 5 wt% of Nb2O5 obtained by compression molding exhibited properties matching those required for medical grade UHMWPE resins, according to ASTM F648-00, making them potential candidates for medical applications.

show abstract

Wear of resin composites: Current insights into underlying mechanisms, evaluation methods and influential factors

Cited by 103 publications

References 110 publications

Glass Fiber Reinforced Composite Orthodontic Retainer: In Vitro Effect of Tooth Brushing on the Surface Wear and Mechanical Properties

Glass Fiber Reinforced Composite Orthodontic Retainer: In Vitro Effect of Tooth Brushing on the Surface Wear and Mechanical Properties

Amalgam phase down: baseline data preceding implementation in Nigeria

Niobium oxide (NB2O5) filled high modulus polyethylene extrudable (HMPEX) composites: tensile properties

Contact Info

Product

Resources

About