Majd SALAMEH, BURCU ŞEREFOĞLU KARABEY, BEYSER PİŞKİN

Farklı Kök Kanal Genişletme Tekniklerinin Kök Kanal Dentininde Defekt Oluşumuna Etkisi

AMAÇ: Self -adjusting file, LightSpeed LSX, ProTaper ve H-tipi el eğesi ile genişletilen daimi insan alt küçük azı dişlerinde genişletme sisteminin kök kanal dentini üzerindeki defekt oluşumuna etkisinin incelenmesidir. YÖNTEM: Çalışmada 50 adet periodontal nedenlerle çekilmiş insan alt küçük azı dişi kullanıldı. Tüm gruplarda 10 ar adet örnek olacak şekilde dişler rastgele 5 gruba ayrıldı. Kök kanallarında Self-adjusting file, ProTaper, LightSpeed LSX sistemleri ve H-tipi el eğeleri ile genişletme ve şekillendirme işlemi tamamlandı. Ardından kök ucundan itibaren koronale doğru 3, 6 ve 9 mm'lerden kesitler alındı. Kök ucunun ve elde edilen kesitlerin x20 büyütmede stereomikroskopta fotoğrafları çekildi. Fotoğraflar iki tarafsız gözlemci tarafından defekt var ve defekt yok olmak üzere 2 skorlu sistem ile değerlendirildi. BULGULAR: Kök ucu, 3 mm ve 6 mm'de sistemler arasında fark görülmezken, 9 mm de LightSpeed LSX grubunda kontrol grubuna göre anlamlı derecede defekt gözlendi. LightSpeed LSX ve ProTaper gruplarında SAF grubuna kıyasla istatistiksel olarak anlamlı derecede daha fazla dentin defekti gözlendi (SAF-ProTaper p=0,038 SAF-LightSpeed p=0,022). SONUÇ: Yüksek hız ve torkta çalışan LightSpeed LSX ile artan konisiteye sahip ProTaper döner alet sistemlerinin dentin üzerinde daha fazla defekt oluşumuna neden olduğu görüldü.

The Effect Of Different Preparation Systems On Dentinal Defect Formation

OBJECTIVE: The purpose of this study was to evaluate the dentinal defects which was occured by four different shaping systems (Protaper, LightSpeed LSX, Self Adjusting File ve H-File) after root canal instrumentation. METHODS: The root canals of fifty extracted human mandibular premolar teeth were instrumented with Self-adjusting file, ProTaper, LightSpeed LSX Ni-Ti systems and Hedström hand files. Roots were then sectioned at 3, 6, and 9 mm from the apex, and photographs were taken under X 20 magnification using a stereomicroscope. All photographs was scored as defect (+) or no defect by two independent observer. RESULTS: Although there were no difference at apeks, 3mm and 6 mm between the experimental groups, statistically significant dentin defects was observed in LightSpeed LSX group when compared with control group. LightSpeed LSX and Protaper caused significantly more dentin defects than SAF system (SAFProTaper p=0,038 SAF-LightSpeed p=0,022). CONCLUSION: More dentin defects were observed in the LightSpeed LSX and ProTaper groups because of working with high speed and tork with LightSpeed LSX files and large taper design of ProTaper instruments.

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