The aim of this study was to introduce a new three-dimensional curvature classification method to evaluate the canal curvature and analyse its effect on the amount of debris extrusion during reciprocating preparation. Freshly extracted mandibular molar teeth were collected. After performing access cavities, periapical radiographs were taken on both mesio-distal and bucco-lingual planes of each tooth using a digital sensor. The radii of the curvature were calculated and a new three-dimensional classification method was used to classify canal curvature, based on radius as follows: Three-dimensionally slight, moderate and severe curve root canal. Fifteen teeth for each curvature sort were randomly chosen for canal instrumentation. The extruded debris was collected in pre-weighed Eppendorf tubes and calculated. A significant difference was noted between root canals with slight and severe three-dimensional curvatures (P < 0.001). It can be concluded that root canal curvature plays a significant role in the amount of extruded debris.
ÖzBu çalışmanın amacı: kök kanal irrigasyonunda sonik aktivasyon için kullanılan EndoActivator, SonicLine ve Eddy sistemlerinin, kök kanallarındaki düzensizliklerden kalsiyum hidroksit ve debris temizleme etkinliklerinin incelenmesidir. 110 sağlam üst orta keser dişin kron kısmı uzaklaştırılıp kök kanal genişletme işlemleri ProTaper Universal ile yapılmıştır. Kökler dikey olarak ikiye bölünüp kanal duvarına bir adet yapay oluk hazırlanmış ve 55 örneğe debris, 55 örneğe kalsiyum hidroksit uygulanmıştır. Birleştirilen yarımlar hermetik olarak örtülenmiş, ardından irrigasyon prosedürleri uygulanmıştır. Deney gruplarında (n=15) total sonik aktivasyon süresi 60 s olarak belirlenmiştir; bunun 30 saniyesi kanalda NaOCl varlığında, 30 saniyesi EDTA varlığında uygulanmıştır. İrrigasyondan sonra kurutulup tekrar açılan örneklerden x40 büyütmeyle stereomikroskop görüntüleri alınarak olukta kalan debris ve kalsiyum hidroksit miktarları standart bir skorlamaya tabi tutulmuştur. Skorlara Kruskal-Wallis ve Dunn-Bonferroni testi uygulanmıştır (p<0.05).İstatistik inceleme sonucunda, kalsiyum hidroksit temizleme etkinliği açısından sonik aktivasyon grupları ile kontrol grubu arasında anlamlı bir fark bulunmamıştır (p>0.05). Sonik aktivasyon gruplarının konvansiyonel şırınga irrigasyon grubuna göre daha etkin debris uzaklaştırdığı (p<0.05), sonik aktivasyon sistem gruplarının birbirleri arasında anlamlı farklılık bulunmadığı (p>0.05) gözlenmiştir.Yeni sistemler olan Eddy ve SonicLine'ın debris ve kalsiyum hidroksit uzaklaştırma açısından EndoActivator'e eşdeğer sonuç verdiği söylenebilir. Bu sistemlerin mekanik özellikleri ve klinik uygulamaları ile ilgili yeni çalışmalar düşünülebilir. AbstractThe aim of this study was to evaluate the efficacy of EndoActvator, SonicLine and Eddy sonic irrigation activation systems in removal of calcium hydroxide and dentinal debris from root canal irregularities.One-hundred-ten human maxillary central incisor teeth were decoronized and instrumented with ProTaper Universal. Teeth were split in half vertically and a standardized groove was formed in canal wall. Fifty-five teeth were filled with calcium hydroxide and fifty-five with dentin debris. Two halves of the samples were brought together and sealed. Final irrigation procedures were applied. Sonic activation was applied to experimental groups. The samples were left to dry and reopened; then digital images were obtained to score remaining debris and calcium hidroxide normatively. Kruskal-Wallis and Dunn Bonferroni tests were applied to the scores (p<0.05).In terms of removing calcium hydroxide from the artificial groove, sonic activation systems were not significantly different from the conventional syringe irrigation (p>0.05). Sonic activation systems resulted better in debris removal than conventional irrigation (p<0.05), however there was no significant difference amongst these three sonic systems (p>0.05).It can be concluded that novel sonic activation systems Eddy and SonicLine resulted equivalent to EndoActivator. Further research can be e...
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