EVALUATION OF 2 NICKEL-TITANIUM INSTRUMENT SYSTEMS IN SHAPING ROOT CANALS

Yıl 2019, Cilt: 29 Sayı: 3, 400 - 406, 16.07.2019

Şenay Yaşar Şeyda Erşahan , Cumhur Aydın

https://doi.org/10.17567/ataunidfd.471219

Cited By: 1

Öz

Evaluation of 2 Nickel-Titanium Instrument Systems in
Shaping Root Canals

Abstract

Objective: To evaluate root canal enlargement following mechanical shaping using 2
nickel titanium rotary systems in simulated curved canals.

Material and Method: Thirty simulated canals in
resin blocks were divided into two experimental groups, each comprising 15
resin blocks, and prepared with Twisted files (TF) and RaCe rotary files using crown-down technique. Preoperative
and postoperative photographs, taken using a digital camera, were superimposed
and aberrations were recorded. The amount of resin removed was measured at 11
different points, beginning at the apical terminus of the canal. Instrument
failure, outer and inner width measurements, transportation rate, and centering
ability were recorded on each central canal path and differences between groups
were statistically analyzed using Student’s t test.

Results: No instrument
fracture occurred during preparation. RaCe instruments removed more material
from the outer canal walls in the apical section (p < 0.01) and from the
inner canal walls in the middle section (p < 0.01) of the canals compared to
TF. However, canals prepared with TF instruments resulted in less
transportation (p < 0.05) in the middle section. No significant differences
were found between the two groups in terms of centering ability in apical,
middle, or coronal sections.  (p >
0.05).

Conclusions: RaCe instruments
removed more resin from the outside of the apical curvature and from the inner side
of the coronal curvature compared to TF. In addition, mean transportation
amount was significantly high for RaCe in middle section (i.e., coronal
curvature). Regarding canal centering ability, however, both instruments
retained original canal geometry and performed similarly.

Key words: Twisted File, RaCe, Curved
root canals, Canal transportation, Centering ability, Ni-Ti rotary
systems

 

 Kök
Kanallarını Şekillendirmesinde İki Nikel Titanyum Alet Sisteminin
Değerlendirilmesi

Amaç: Simüle edilmiş
eğri kanallarda 2 nikel titanyum döner alet sistemi kullanılarak mekanik
şekillendirme sonrası kök kanal genişlemesinin değerlendirilmesi.

Gereç
ve Yöntem: Reçine bloklardaki otuz adet simüle
edilmiş kanal, her biri 15 adet rezin bloğu içeren iki deney grubuna ayrıldı ve
Twisted files (TF) ve RaCe döner eğeleri kullanılarak crown-down tekniğiyle
şekillendirildi. Bir dijital kamera
kullanılarak çekilen preoperatif ve postoperatif fotoğraflar çakıştırıldı ve sapmalar
kaydedildi. Kaldırılan rezin miktarı, kanalın apikal sonlanmasından başlayarak
11 farklı noktada ölçülmüştür. Her bir kanal yolundaki dış ve iç genişlik
ölçümleri, transportasyon oranı, merkezde kalma yeteneği ve alet kırığı
kaydedildi ve gruplar arasındaki farklar Student t testi kullanılarak
istatistiksel olarak analiz edildi.

Bulgular: Preparasyon sırasında alet kırılması
meydana gelmedi. RaCe eğeleri TF’e kıyasla kanalların apikal kısımdaki dış
kanal duvarlarından (p <0.01) ve orta kesitindeki iç kanal duvarlarından (p
<0.01) daha fazla materyal kaldırdı. Ancak, TF eğeleriyle hazırlanan
kanallarda orta kısımda daha az transportasyon görüldü (p < 0.05).  İki grup arasında, apikal, orta veya koronal
kesitlerde merkezde kalma yeteneği açısından anlamlı fark bulunmadı (p >
0.05).

Sonuçlar: RaCe eğeleri TF’e kıyasla, apikal
kurvatürün dışından ve koronal kurvatürün iç kısmından daha fazla rezin kaldırmıştır.
Ek olarak, ortalama transportasyon miktarı orta kısımda RaCe için anlamlı
derecede yüksekti (yani koronal eğrilik). Bununla birlikte kanalın merkezinde
kalma yeteneği ile ilgili olarak, her iki enstrüman da orijinal kanal
geometrisini korudu ve kanalı benzer şekilde şekillendirdi.

Anahtar kelimeler: Twisted File, RaCe, Eğri  kök kanalları, Kanal transportasyonu, Merkezde kalma yeteneği, Ni-Ti döner alet sistemleri

Anahtar Kelimeler

Twisted File, RaCe, Curved root canals, Canal transportation, Centering ability

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