Saremco dental released 3D printing caries filling resin
Saremco dental AG, a Swiss dental resin manufacturer, has released a new photosensitive polymer resin for permanent restorations such as crowns, inlays, inlays and veneers for 3D printing. Prior to its release, crowntec resins were routinely qualified and pre marketed by t ü vs ü D, a global certification company, which is the designated body of the EU medical device directive. The resin is also the research subject of the University of Zurich in Switzerland, which shows that the UV curable crowntec may be a valuable competitor of traditional ceramic crowns.
The work of the University's dental center is to pitting resin with three traditional particle filled composite ceramics in the fracture load test. The four materials were used to produce a total of 180 crown samples with different wall thickness (0.5mm, 1mm, 1.5mm), and the resin 3D was printed on the asiga system. The mechanical properties of the crown were tested by thermo mechanical load and fracture test equipment provided by the University.
Crowns have different wall thicknesses (0.5mm, 1mm, 1.5mm) pictures from the University of Zurich
Because it is similar to bone in color and texture, ceramic or porcelain crown is a common choice in dental field. Although its mechanical properties are lower than that of gold or silver, ceramic is still the first choice for dental restoration in the world. In order for an experimental light curing resin to surpass the traditional ceramic restorations in general, it must show excellent mechanical properties, similar to bone and moderate price.
So how does Saremco 's Resin stack up? The young's modulus of 3D resin is 4.5GPa compared with the traditional ceramics with 10-15gpa variation. The lower Young's modulus means that the material is more elastic, so it is not easy to fracture under tensile load. Traditional ceramics are more fragile and may break under high pressure. The researchers determined that the average loading force of 3D resin in the 1.5mm group was 1479n. On the contrary, the average loading force of traditional ceramics is 1580n, 1251n and 1516n, which means that the impact force of 3D resin is higher than that of one kind of ceramics, and it will not be broken, but it is not behind the other two kinds. The average loading force of each material increases with the increase of wall thickness. Then it is determined that the dental resin has similar or better mechanical properties with the traditional ceramic crowns found in today's dental industry.
SLA made molds and restorations from the University of Zurich
Further details of this study can be found in the title "fracture load of composite crowns manufactured by CAD / CAM and printed in 3D as a function of material thickness". It was written by Zimmerman M., Ender A., egli g., ozcan M., and Mehl a. Dental resins must have a certain level of toughness and durability as they are applied once they are in a stable state of use. Last year, SLA 3D printer manufacturer formlabs announced at a trade show in Las Vegas its digital denture resin, which has the quality necessary for direct 3D printing of dental restorations. Earlier this year, formlabs also announced a partnership with bego, which will allow dental professionals to use bego's new leading dental materials with formlabs' resin printers for temporary and permanent repairs.
Source: Zhongguancun Online
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