Właściwości kształtujące narzędzi ProTaper Universal, WaveOne i ProTaper Next w sztucznie wytworzonych kanałach korzeniowych w kształcie liter L i S
Shaping ability of ProTaper Universal, WaveOne and ProTaper Next in simulated L-shaped and S-shaped root canals
Root canal preparation is regarded as one of the most important steps in endodontic treatment. Its main goals are to remove the infected and necrotic tissue out of root canals, to create smooth walls facilitating irrigation and obturation, to preserve the anatomy of apical foramen, and to conserve the sound root dentine for long term effect [1, 2]. Nowadays, many kinds of Nickel-Titanium (Ni-Ti) rotary files have been invented to facilitate root canal preparation, such as PTU, WO and PTN. The application of these files has greatly improved cutting efficiency and safety compared with stainless steel files [3]. PTU is made of conventional Ni-Ti wire and has been widely used in root canal treatment, while both WO and PTN are made of M-wire. WO works in a reciprocating mode and finishes root canal preparation with only one file in most cases [4]. PTN is a successor to PTU. And the cross section of PTN is an off-centred rectangle which makes the file rotated in a unique asymmetric motion like a snake [5].
Shaping ability and cyclic fatigue resistance are of special importance when evaluating the performance of Ni-Ti files. Furthermore, central axis transportation and curvature straightening of root canals are two important parameters for estimating the shaping ability of Ni-Ti files. Simulated root canals in resin blocks are [...]
którzy są subskrybentami naszego portalu.
i ciesz się dostępem do bazy merytorycznej wiedzy!
