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14 TRENDS & APPLICATIONS Dental Tribune Asia Pacific Edition | 11/2017 turation can be conducted with GuttaFlow bioseal, a bioactive three-in-one obturation mate- rial that combines cold free- flow gutta-percha with a sealer and bioceramic in one out- standing filling system and with HYGENIC and ROEKO Gut- tapercha points. Recent studies have evaluated the in vitro toxicity of endodontic sealers such as GuttaFlow bioseal and GuttaFlow 2, as well as Angelus’s MTA-FILLAPEX and Dentsply Sirona’s AH Plus, on stem cells from the periodontal ligament. It was found that especially GuttaFlow bioseal and also GuttaFlow 2 showed lower tox- icity levels and higher cell via- bilities than the competing seal- ers did. In addition, GuttaFlow 2 demonstrated a better result in terms of micro leakage and seal- ing ability than the competing sealers did. COLTENE’s HyFlex instru- ment, probably its best-known product, has set a new benchmark for NiTi rotary files. HyFlex EDM, the latest generation, integrates the controlled memory effect of its predecessor, HyFlex CM (Figs. 2 & 3). Furthermore, owing to an inno vative manufacturing process using electrical discharge machining, HyFlex EDM has a specially hardened surface that makes the files stronger and more fracture-resistant. The controlled memory of both HyFlex CM and HyFlex EDM gives the instru- ments a number of important properties, including extreme flexibility, superior canal track- ing, regeneration after repeat au- toclaving and strong fatigue re- sistance. To achieve these characteris- tics, HyFlex CM and HyFlex EDM are manufactured using a spe- AD www.idem-singapore.com www.idem-singapore.com 13 -15 APRIL 2018 SUNTEC SINGAPORE THE LEADING DENTAL EXHIBITION AND CONFERENCE IN ASIA PACIFIC MEET THE 2018 CONFERENCE SPEAKERS Galip Gurel Magda Feres Christopher Ho Simone Grandini Lawrence Lau Magda Mensi Angelo Mariotti Marcus Dagnelid Andreas Kurbad TRADE EXHIBITION Meet over 550 exhibitors at IDEM and discover the latest products and services the dental industry has to offer. IDEM attracts all the major players in the dental industry to the Asia Pacific for three power packed days of exhibition, making it the ideal platform to cement your existing professional relationships and connect with future business partners. EARLY BIRD REGISTRATION CLOSES ON 31 JANUARY 2018! Registration Connect with us Koelnmesse Pte Ltd Ms. Cindy Tantarica T: +65 6500 6700 E: idem-reg@koelnmesse.com.sg IDEM Singapore IDEM Singapore idem.sg Endorsed by Supported by Held in Organised by Singapore Dental Association cial thermomechanical process whereby the crystallographic phase transition from austenite to martensite at room tempera- ture results in an advanced con- trolled memory of the material, making both files extremely flexible. “We successfully managed to give our NiTi material shape memory properties,” said Müller. “We did this by changing the DNA of the material through a switch from low to room tem- perature. Our idea became not only an innovation, but a prod- uct many of our competitors have tried unsuccessfully to copy.” Introduced at the Inter- national Dental Show in Ger- many two years ago, the new HyFlex EDM reduces the num- ber of files needed to two to three, particularly in straight and larger canals. Proven clinical experience According to Müller, a num- ber of clinical studies have demonstrated the efficacy of both systems. For example, Goo et al. compared the bending stiffness, cyclic fatigue and tor- sional fracture resistance of NiTi rotary instruments, including V-Taper 2, V-Taper 2H (both SS White), HyFlex CM, HyFlex EDM and ProTaper Next X2 (Dentsply Sirona). HyFlex EDM showed the highest cyclic fatigue resistance of the group, with V-Taper 2H and HyFlex CM coming in next. Over- all, they showed high torsional resistance. In comparison with HyFlex CM, the EDM version demonstrated a higher fracture resistance. In another study, Kaval et al. aimed to evaluate these proper- ties in novel NiTi rotary files, including HyFlex EDM OneFile from COLTENE, ProTaper Gold and ProTaper Universal (both Dentsply Sirona). The results showed that HyFlex EDM One- File demonstrated significantly higher cyclic fatigue resistance and higher distortion angle to fracture, but a lower torsional resistance than both ProTaper options. In addition, Pedulla et al. sought to measure the tor- sional and cyclic fatigue resist- ance of HyFlex EDM OneFile in comparison with VDW’s RECIPROC R25 and Dentsply Sirona’s WaveOne Primary. HyFlex was found to have a sig- nificantly higher cyclic fatigue resistance and higher angular rotation to fracture. Furthermore, Iacono et al. aimed to measure the wear of HyFlex EDM after clinical appli- cation. No fractures were regis- tered, no wear or degradation was reported, and the increased fatigue resistance of HyFlex EDM (compared with HyFlex CM) al- lowed it to remain usable for longer when shaping severely curved canals.