Irrigation patterns during ultrasonic canal instrumentation. Part I. K-type files
1988; Elsevier BV; Volume: 14; Issue: 2 Linguagem: Inglês
10.1016/s0099-2399(88)80003-7
ISSN1878-3554
AutoresKeith Krell, Randall J. Johnson, Sandra Madison,
Tópico(s)Drilling and Well Engineering
ResumoThis study examined the irrigation patterns of K-type endosonic files in 20 straight and 20 curved artificial canals. One-half of each group was inverted during instrumentation. Canals were instrumented sequentially using an ultrasonic endodontic unit and #15, 20, and 25 K-type files. A food color dye was placed into the reservoir for the irrigant. The time for total irrigant penetration in the canal was recorded for each file size. The #15 file required the greatest time for penetration in all groups and straight canals required longer instrumentation times for complete irrigant penetration when compared with curved canals. The irrigant could not advance to the most apical extent until the file could "freely" vibrate. Use of ultrasonic files should result in irrigant penetration to the most apical extent of the instrument.
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