Biaxial flexural strength of Turkom-Cera core compared to two other all-ceramic systems

Abstract

Advances in all-ceramic systems have established predictable means of providing metal-free aesthetic and biocompatible materials. These materials must have sufficient strength to be a practical treatment alternative for the fabrication of crowns and fixed partial dentures.ObjectivesThe aim of this study was to compare the biaxial flexural strength of three core ceramic materials. Material and methodsThree groups of 10 disc-shaped specimens (16 mm diameter x 1.2 mm thickness - in accordance with ISO-6872, 1995) were made from the following ceramic materials: Turkom-Cera Fused Alumina [(Turkom-Ceramic (M) Sdn Bhd, Puchong, Selangor, Malaysia)], In-Ceram (Vita Zahnfabrik, Bad Säckingen, Baden-Württemberg, Germany) and Vitadur-N (Vita Zahnfabrik, Bad Säckingen, Baden-Württemberg, Germany), which were sintered according to the manufacturer's recommendations. The specimens were subjected to biaxial flexural strength test in a universal testing machine at a crosshead speed of 0.5 mm/min. The definitive fracture load was recorded for each specimen and the biaxial flexural strength was calculated from an equation in accordance with ISO-6872. ResultsThe mean biaxial flexural strength values were: Turkom-Cera: 506.8±87.01 MPa, In-Ceram: 347.4±28.83 MPa and Vitadur-N: 128.7±12.72 MPa. The results were analyzed by the Levene's test and Dunnett's T3 post-hoc test (SPSS software V11.5.0 for Windows, SPSS, Chicago, IL, USA ) at a preset significance level of 5% because of unequal group variances (P<0.001). There was statistically significant difference between the three core ceramics (P<0.05). Turkom-Cera showed the highest biaxial flexural strength, followed by In-Ceram and Vitadur-N. ConclusionsTurkom-Cera core had significantly higher flexural strength than In-Ceram and Vitadur-N ceramic core materials.

Flexural strength comparison of self-synthesised porcelain with the sintering temperature of 1150 degree Celsius and 1200 degree Celsius

“…With the initial load and the speed of adding a more significant load will cause the fractured sample to be faster and the measurement results to be able because the force borne by the specimen becomes a dynamic force. 1,2,8,9 Differences of the flexural strength at 2 different combustion temperatures can be caused by the level of maturity associated with crystalline formation and porosity on porcelain. Crystalline formed on this self-synthesis porcelain was crystalline leucite.…”

“…1,2 Occlusal forces associated with the masticatory forces of the posterior region range from 700-760 N which means dental porcelain with a thickness of 1-2 mm must have a flexural strength of 100-120 MPa in the occlusal area of the posterior teeth. [1][2][3] Flexural strength can be tested in various ways including three-point bending, four-point bending, or biaxial flexural strength test. 1,2 Felspathic porcelain has flexural strength between 60-80 MPa.…”

“…[1][2][3] Flexural strength can be tested in various ways including three-point bending, four-point bending, or biaxial flexural strength test. 1,2 Felspathic porcelain has flexural strength between 60-80 MPa. This material has a lower strength than the material used for all-ceramic, this is because felspathic porcelain is usually supported by metals in metal-ceramic restorations.…”

Esthetic crown lengthening for maxillary anterior teeth: an interdisciplinary case report

“…Recent studies have shown that Turkom-Cera demostrated equal to or higher loads at fracture than accepted all ceramic materials. [5][6][7] It would seem to be acceptable for fabrication of esthetic anterior ceramic crowns.…”

Addition of a pontic to all-ceramic Turkom-Cera fixed partial denture restorations

“…[ 2 ] High-strength all-ceramic materials, such as alumina, zirconia, and pressed, castable, or machinable glass ceramics, are commonly used in dentistry. [ 3 ] Alumina- and zirconia-based ceramics are attractive as potential materials for all-ceramic restorations (ACRs) in high stress-bearing areas. [ 4 ] The most commonly reported major complication that requires complete refabrication of an ACR is fracture of the veneering porcelain and/or ceramic coping.…”