Future Innovation and Research in Dental Restorative Materials

Rekow, E. Dianne; Fox, Christopher H.; Watson, Tim; Petersen, Poul Erik

doi:10.1177/0022034513502205

Cited by 13 publications

(6 citation statements)

References 21 publications

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“…Computer-aided design/computer-aided manufacturing (CAD/CAM) was introduced in dentistry forty-years ago, and gained popularity worldwide because of advancements in restorative materials with characteristics such as crack tolerance, ease of clinical use and good performance [1][2][3][4][5] . To meet high aesthetics requirements, an ideal restorative material requires attributes including physical and mechanical properties like thermal, optical, water absorption, fracture toughness, fracture resistance, and fatigue resistance 2,3) . CAD/CAM technology eliminates dimensional changes during laboratory manufacturing process.…”

Section: Introductionmentioning

confidence: 99%

Effect of storage and aging conditions on the flexural strength and flexural modulus of CAD/CAM materials

et al. 2019

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Computer-aided design/computer-aided manufacturing (CAD/CAM) materials were submitted to thermocycling, to identify changes in mechanical behavior. Four CAD/CAM materials were divided in four subordinate groups (n=9): (1) dry out for 7 days, (2) distilled water at 37 o C for 7 days, (3) 60,000 thermocycles, and (4) 120,000 thermocycles. Following thermocycling, samples were submitted to three-point bending test. Two-way ANOVA and post-hoc Tukey's test were performed (α=0.05). The IPS e.max CAD had a flexural strength of 396±75 MPa and flexural modulus of 84±11 GPa, followed by Vita Enamic with values of 153±17 MPa and 28±5 GPa respectively. The flexural strength recorded for Lava Ultimate was 149±28 MPa and the flexural modulus was 12±3 GPa. Vitablocs Mark II had the lowest flexural strength values (125±10 MPa) and a flexural modulus of 49±15 GPa. Although polymer-based materials have similar mechanical properties compared to ceramics, they are affected by thermo cycling conditions.

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Section: Introductionmentioning

confidence: 99%

Effect of storage and aging conditions on the flexural strength and flexural modulus of CAD/CAM materials

et al. 2019

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“…Yet estimates of daily exposure were very low (Berglund 1990), and retrieved amalgam from clinical trials showed little Hg being lost during the lifetime of the restorations (Marshall et al 1988). Dental and scientific communities generally believe amalgam is safe and effective because little Hg ever escapes from restorations, but the demand for tooth-colored materials, coupled with environmental concerns, has led to a ban in some countries and a significant decline in use in others and will eventually phase out in response to the Minamata convention of 2013 (American Dental Association 1991; Jones 2008; Rekow et al 2013).…”

Section: The Direct Restorative Revolution—dental Amalgammentioning

confidence: 99%

The Evolution of Dental Materials over the Past Century: Silver and Gold to Tooth Color and Beyond

et al. 2019

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The field of dental materials has undergone more of a revolution than an evolution over the past 100 y. The development of new products, especially in the past half century, has occurred at a staggering pace, and their introduction to the market has been equally impressive. The movement has mostly come in the area of improved esthetics, marked by the gradual replacement of dental amalgam with dental composite and all-metal and porcelain-fused-to-metal indirect restorations with reinforced dental ceramics, all made possible by the rapid improvements in dental adhesive materials. This article covers the time course of dental materials development over the past century in which the Journal of Dental Research has been published. While there have been advances in nearly all materials used in the field, this article focuses on several areas, including dental amalgam, dental composites and light curing, dental adhesives and dental cements, ceramics, and new functional repair materials. A few short statements on future advances will be included at the end.

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“…However, results based on clinical work in settings where cost per unit time is of nominal concern do not provide any indications on how the restorative material will perform when placed by the average dentists in mouths of their spectrum of patients during a busy workday. Stakeholders have raised a reasonable concern about whether manufacturers should devote more time and effort to develop restorative materials that perform adequately in the hands of most professionals or optimal performance in the hands of only the highly skilled professionals [157]. …”

Section: Secondary Caries Incidence In Controlled Clinical Studies Vementioning

confidence: 99%

Secondary caries and microleakage

Jokstad

2016

Dental Materials

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Objectives: To critically appraise experimental ex vivo research that has focussed on secondary caries, and to offer possible explanations for the seemingly poor correlation to clinical observations. Methods: The literature relating to the etiopathogenesis or prevention of secondary caries gained from experimental ex vivo research was reviewed, with particular emphasis on microleakage and artificial caries-like lesions.Results: It is doubtful whether a caries wall lesion can exist independently of an outer enamel caries lesion. Microleakage experiments apparently continue to emerge regardless of multiple reviews questioning the reliability and validity of the method. Several of the approaches used to generate artificial caries-like lesions are very aggressive. Remarkably little discussion has evolved about how these aggressive approaches create microenvironments that do not occur in reality. Corrosion-and biodegradation products may influence the biofilm qualitatively and quantitatively and it is difficult to replicate these variables in any ex vivo environment. Clinical data sampling method, patient demography as well as study methodology influences the incidence and prevalence estimates of secondary caries. Clinical results based on clinical work in settings where cost per unit time is of nominal concern do not provide any indications on how the restorative material will perform when placed by the average dentists in the mouths of their spectrum of patients during a busy workday.Recommendations: The term "wall lesion" including its variants is ill defined, has been, and is still being used indiscriminately. Stakeholders should avoid using this ambiguous label due to its connotation to an entity that does not exist per se.

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Future Innovation and Research in Dental Restorative Materials

Cited by 13 publications

References 21 publications

Effect of storage and aging conditions on the flexural strength and flexural modulus of CAD/CAM materials

Effect of storage and aging conditions on the flexural strength and flexural modulus of CAD/CAM materials

The Evolution of Dental Materials over the Past Century: Silver and Gold to Tooth Color and Beyond

Secondary caries and microleakage

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