만곡근관에서 수동식 기구와 엔진 구동형 기구의 근관성형 효과에 대한 비교 연구
THE EFFECTS OF VARIOUS INSTRUMENTATION TECHNIQUES IN CURVED CANALS OF RESIN BLOCKS
소속 상세정보
정일영/Il Young Jung
윤태철/이승종/Tai Cheol Yoon/Seung Jong Lee
KMID : 0362319970220020648
Abstract
The purpose of this study was to compare the effects of various techniques on the
quality and quantity of instrumentation in curved canals. Instrumentation time was
evaluated too.
Forty eight canals of resin blocks(35 ) were divided into three groups and filed. In
group A, 16 blocks were instrumented using a step-back technique with stainless
steel(SS) K-file(Mani,Matsutani Seisakusho Co.,Japan). In group B, canals were prepared
with SS K-files using the Endo-Angle (Nakanishi Dental MFG.CO.,LTD.,Japan). Group
C was prepared using Ni-Ti engine-driven instruments (Quantec Series
2000TM system).
Group A and B were filed from #15 to #25 at the apex followed by a 1 mm stepback
technique, and the coronal half of the canals were flared with Gates Glidden burs(#2,3,4).
Group C was instrumented from #1 to #8.
After the instrumentation time was measured, canals were filled with India ink, and
photographed, which to magnify the canal images 8 times. Using these photographs the
apical portions were evaluated And scored from 1 to 4 according to the severity of
ledging and zipping. On the same photographs, the area of the coronal two thirds of the
canals were measured using a personal computer with the computer program Brain and
Digitizer (SummaSketch III). The following results were obtained.
1. Instrumentation time was significantly shorter for group C, as opposed to group A
and B(ANOVA, P<0.05).
2. The qualitative evaluation of the apical portions of the canals showed no significant
difference between the groups(Kruscal-Wallis, p>0.05).
3. The area removed by group C was significantly smaller than group A and B
(ANOVA, P<0.05).
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