Avtor/Urednik		Fidler, A
Naslov		Preprečevanje zloma NiTi-instrumentov za strojno širjenje koreninskih kanalov
Prevedeni naslov		Prevention of NiTi rotary instrument fractures
Tip		članek
Vir		Zobozdrav Vestn
Vol. in št.		Letnik 62, št. 2-3
Leto izdaje		2007
Obseg		str. 77-84
Jezik		slo
Abstrakt		Major advantages of NiTi rotary over hand root canal instrumentation are better root canal shape and faster and less tiring work. Recent studies have shown that the fracture rate of NiTi rotary instruments is comparable to that of hand instruments. Fracture of rotary NiTi instruments is a consequence of torsional overload, cyclic fatigue of the material or a combination of these two factors. Fracture due to torsional overload usually occurs when instruments with a small cross-sectional diameter are used in root canals without prior manual preparation. Fractures due to cyclic fatigue usually occur when instruments with a big cross-sectional diameter are used in curved root canals. The incidence of fractures in clinical work depends on operator competence, shape and curvature of the root canal, and shape, size and prior use of the instrument.
Deskriptorji		ROOT CANAL PREPARATION DENTAL INSTRUMENTS EQUIPMENT FAILURE TITANIUM NICKEL