Details

Autor(en) / Beteiligte

• Gheorghiţă, Lelia
• Diaconu, Oana
• Petcu, Cristian
• Raescu, Mihaela
• Cumpată, Cristian Niky
• Voinea, Ruxandra
• Groza, Ana
• Moraru, Iren Alina
• Ţuculina, Mihaela

Titel

USING THE TF-ADAPTIVE ROTARY SYSTEM TO TREAT IRREVERSIBLE PULPITIS. A CLINICAL STUDY

Ist Teil von

• International journal of medical dentistry, 2019-07, Vol.9 (3), p.221-228

Ort / Verlag

Iasi: Apollonia University of Iasi, Medical Dentistry Faculty

Erscheinungsjahr

2019

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• Flute pitch length may also affect fracture [14], but the ratio of the dimensions of the shank to the dimensions of the flute (shank-to-flute ratio) is preserved with instrument taper, so that it is not a contributing factor to the occurrence of fracture. Since the introduction of NiTi in 1988 [15], varied instrument designs with claims of superior cyclic fatigue resistance have been propagated. [...]there were no major changes in the manufacturing process of raw materials until the introduction of the second generation of NiTi files, M-Wire (Dentsply Tulsa Dental Specialties, Tulsa, OK) in 2007 and Twisted File (TFTM) (Kerr Endodontics Formerly Axis/SybronEndo, Orange, CA) in 2008. Since the introduction of NiTi in 1988 [15], varied instrument designs with claims of superior cyclic fatigue resistance have been propagated. [...]TF™ instruments are created by taking a raw NiTi wire in the austenite crystalline structure phase and transforming it into a different phase of crystalline structure (R-phase) by a process of heating and cooling. The manufacturing process aims at respecting the grain structure for maximum strength as grinding creates micro fracture points during the manufacturing of the instruments. Because TF™ files are twisted and not ground, no surface microfractures occur on their surface and therefore do not need be polished away; thereby not dulling the cutting edges and retaining their efficient cutting ability [16, 17]". According to this study, the appearance of root fissures was not reported when using the TF Adaptive rotating system [23].