Effect of glide path preparation on apical debris extrusion of rotary and reciprocating single-file systems: OneShape versus WaveOne.

Objective To assess the effect of glide path on the amount of apically extruded debris after instrumentation with WaveOne and OneShape.Methods. Forty-eight extracted human mandibular incisorswere assigned to 4 groups. In groups 1 and 2, preparation was completed with WaveOne In groups 3 and 4, canals were prepared with OneShape. Before instrumentation, in groups 1 and 3, glide path was created with PathFile 1, 2, and 3 at working length, whereas in groups 2 and 4, glide path was not performed. The weight of the extruded debris for each group was calculated by comparing the pre- and post-instrumentation weights of the eppendorf tubes. The time required for reaching full WL was also recorded. Data were analyzed by Kruskal–Wallis and Mann–Whitney U tests. Results. There was no difference in the amount of debris extruded between the single file systems (P=0.234). Time required to reach full WL was significantly decreased by creating a glide path (P< 0.05).Conclusion. Creation of a glide path does not significantly affect the apically extruded debris

Postoperative pain intensity after using different instrumentation techniques: a randomized clinical study

Postoperative pain is a frequent complication associated with root canal treatment, especially during apical instrumentation of tooth with preexisting periradicular inflammation Objectives The aim of this clinical study was to evaluate the influence of the instrumentation techniques on the incidence and intensity of postoperative pain in single-visit root canal treatment. Material and Methods Ninety patients with single root/canal and non-vital pulps were included. The patients were assigned into 3 groups according to root canal instrumentation technique used; modified step-back, reciprocal, and rotational techniques. Root canal treatment was carried out in a single visit and the severity of postoperative pain was assessed via 4-point pain intensity scale. All the participants were called through the phone at 12, 24 and 48 h to obtain the pain scores. Data were analyzed through the Kruskal–Wallis test. Results There was significant difference between all groups (

Apical Root Canal Transportation of Different Pathfinding Systems and Their Effects on Shaping Ability of Protaper Next

Background This study aimed to compare glide path preparation of different pathfinding systems and their effects on the apical transportation of ProTaper Next (Dentsply Maillefer, Ballaigues, Switzerland) in mesial root canals of extracted human mandibular molars, using digital subtraction radiography. Material and Methods The mesial canals of 40 mandibular first molars (with curvature angles between 25° and 35°) were selected for this study. The specimens were divided randomly into 4 groups with 10 canals each. Glide paths were created in group 1 with #10, #15 and #20 K-type (Dentsply Maillefer, Ballaigues, Switzerland) stainless steel manual files; in group 2 with Path-File (Dentsply Maillefer) #1, #2, and #3 and in group 3 with #16 ProGlider (Dentsply Maillefer) rotary instruments; in group 4 no glide paths were created. All canals were instrumented up to ProTaper Next X2 to the working length. A double digital radiograph technique was used, pre and post-instrumentation, to assess whether apical transportation and/or aberration in root canal morphology occurred. Instrument failures were also recorded. The data were analyzed statistically using ANOVA and Tukey tests (p0.05). Two ProTaper Next instruments failed in-group 4. Conclusions Within the parameters of this study, there was no difference between the performance of path-finding files and ProTaper Next system maintained root canal curvature well and was safe to use either with path-finding files or alone., Key words:Glide path, PathFile, ProGlider, ProTaper Next, transportation.PubMedScopu

Influence Of A Glide Path On The Dentinal Crack Formation Of Protaper Next System

Objectives The aim was to evaluate dentinal crack formation after root canal preparation with ProTaper Next system (PTN) with and without a glide path. Materials and Methods Forty-five mesial roots of mandibular first molars were selected. Fifteen teeth were left unprepared and served as controls. The experimental groups consist of mesiobuccal and mesiolingual root canals of remaining 30 teeth, which were divided into 2 groups (n = 15): Group PG/PTN, glide path was created with ProGlider (PG) and then canals were shaped with PTN system; Group PTN, glide path was not prepared and canals were shaped with PTN system only. All roots were sectioned perpendicular to the long axis at 1, 2, 3, 4, 6, and 8 mm from the apex, and the sections were observed under a stereomicroscope. The presence/absence of cracks was recorded. Data were analyzed with chi-square tests with Yates correction. Results There were no significant differences in crack formation between the PTN with and without glide path preparation. The incidence of cracks observed in PG/PTN and PTN groups was 17.8% and 28.9%, respectively. Conclusions The creation of a glide path with ProGlider before ProTaper Next rotary system did not influence dentinal crack formation in root canals.PubMe

COMPARISON OF APICALLY EXTRUDED DEBRIS USING THREE DIFFFERENT ROTARY INSTUMENTATION TECHNIQUES

Bu in vitro çalışmanın amacı; üç farklı döner eğe sisteminin, apikalden taşan debris miktarı yönünden karşılaştırılmasıdır. Çalışmada 36 adet çekilmiş insan daimi alt çene küçük azı dişi kullanıldı. Dişler, Revo-S, Twisted File ve OneShape şekillendirilmek üzere üç ayrı deney grubuna ayrıldı (n=12). Apikalden taşan debrismiktarının ölçümü amacıyla ependorf tüpü kullanılarak özel bir düzenek hazırlandı. Apikalden taşan debris miktarı, debris içeren Ependorf tüplerin ağırlığından boş Ependorf tüplerin ağırlığı çıkarılarak hesaplandı. Verilerin değerlendirilmesinde tek yönlü ANOVA analizi kullanıldı. Çalışmada kullanılan tüm döner sistemlerin ölçülebilirmiktarda apikalden debris taşmasına sebep olduğu gözlendi. Apikalden taşan debris miktarı açısından sistemler arasında istatistiksel fark gözlenmedi (p=0,632). Bu çalışmanın koşulları altında; Revo-S, Twisted File ve OneShape döner eğe sistemleri ile yapılan kök kanal preparasyonunda apikalden taşan debris miktarının birbirine çok yakın olduğu bulunduThe purpose of this in vitro study was to compare three different rotary instrumentation systems for the amount of apically extruded debris. Thirty six extracted human permanent mandibular premolar teeth were used in the study. Teeth were divided into three experimental groups in order to shaping with (n=12) Revo-S, Twisted File and OneShape. The extruded debris was collected in preweighed eppendorf tubes. The weight of extruded debris determined by subtracting the empty tubes weight from the filled tubes weight. Data were analyzed using one way ANOVA test. All systems caused apically extruded debris. There was no statistically significant difference among the three groups with respect to extruded debris (p=0,632). Under the conditions of this study, it was found that Revo-S, Twisted File ve OneShape systems caused similar apically extruded debris during root canal preparatio

Evaluation Of Dentinal Tubule Penetration Depth And Push-Out Bond Strength Of Ah 26, Bioroot Rcs, And Mta Plus Root Canal Sealers In Presence Or Absence Of Smear Layer

Background. This study compared the effect of smear layer on the penetration depth and push-out bond strength of various root canal sealers. , Methods. A total of 90 extracted human mandibular premolars were assigned into 2 groups: smear layer preserved and smear layer removed. Then the roots were further divided into 3 subgroups according to the sealer tested: AH 26, BioRoot RCS and MTA Plus. Obturation was performed with gutta-percha and the relevant sealer was mixed with 0.1% rhodamine B. Three 1-mm-thick slices were obtained from the mid-third area of each root. Two slices were selected for the push-out test and the remaining slice was used to calculate the dentinal tubule penetration depth and percentage. , Results. The retention of MTA Plus and BioRoot RCS was higher than that of AH 26 when the smear layer was preserved (P<0.05). BioRoot RCS showed the lowest penetration depth when the smear layer was removed (P<0.05). , Conclusion. Dentinal tubule penetration of root canal sealers had a limited effect on their adhesion to root canal wall.PubMe

Influence Of Cement Type And Thickness On Polyfiber Post Adhesion

Introduction: To evaluate the effect of two different post space diameters and related resin cement film thicknesses on the bond strength of a polyfiber post. Materials and Methods: A total of 48 premolars were randomly divided into two according to the post space diameter: 1.1 mm and 1.5 mm. Then each group was divided into three sub-groups according to luting cement used: RelyX U100, Panavia F2.0/ED primer, Clearfil SA cement. Spirapost was then luted into the canal using luting cements. Two slices were obtained from each root specimen. Push-out tests were performed. Data was analyzed with Kruskal-Wallis and Connover post-hoc and Mann-Whitney U-test (P < 0.05). Results: Push-out bond strength was found to vary significantly according to type of adhesive system and post space diameter size (P < 0.05). The self-adhesive resin cement RelyX U100 had significantly higher bond strengths compared with the other adhesive system (P < 0.05). The self-etch adhesive system (Panavia F2.0) showed significantly lower bond strengths compared with the other systems (P < 0.05). There was a significant interaction between the luting systems and post space diameter (P < 0.05). Conclusion: The increases in post space diameter significantly reduced the bond strength of Spirapost to root dentine for both groups.PubMe

INFLUENCE OF DIFFERENT FINAL ROOT CANAL IRRIGATION REGIMENS ON THE PUSH-OUT BOND STRENGTH OF AH PLUS

Amaç: Son yıkamada kullanılan farklı kök kanal irrigasyon solüsyonlarının epoksi rezin esaslı kök kanal dolgu patının (AH Plus), kök kanal dentinine bağlanma dayanımı üzerindeki etkilerini incelemektir. Materyal Metod: Kırk sekiz adet tek kanallı, alt çene, ön ve yan keser diş kullanılmıştır. Şekillendirme sırasında örnekler %2,5'luk sodyum hipoklorit ile irrige edilmiş, solüsyonuna göre örnekler rastgele 4 gruba ayrılmıştır (n = 12): Grup 1: 5 ml %17 etilendiamintetraasetik asit (EDTA); Grup 2: 5 ml %17 EDTA ardından 5 ml %2 klorheksidin glukonat (CHX), Grup 3: 5 ml QMix; ve Grup 4: kontrol grubu olarak 5 ml distile su. Tüm örnekler güta-perka ve AH Plus ile doldurulmuştur. Bağlanma dayanımı testi için her örnekten 1 mm kalınlığında dörder kesit elde edilmiştir. Bağlanma dayanımı verileri tek yönlü Anova ve Bonferroni testleri ile analiz edilmiştir (p <0,05). Bulgular: EDTA/CHX ile irrige edilen örneklerde bağlanma dayanımı değerleri istatistiksel olarak daha yüksek solüsyonlarından bağımsız olarak örneklerin çoğunda koheziv başarısızlık gözlenmiştir. Sonuçlar: Son yıkamada %17 EDTA'yı takiben %2 CHX kullanımı AH Plus'ın bağlanma dayanımı değerlerini arttırmıştır. Son yıkamada EDTA ve CHX ayrı ayrı uygulamak AH Plus'ın bağlanma dayanımını, içeriğinde EDTA ve CHX barındıran QMix'e göre daha olumlu etkilemiştirAim: To evaluate influence of different final irrigation regimens on bond-strength of epoxy resin based sealer (AH Plus). Material and method: Forty-eight mandibular incisors were irrigated with 2.5% sodium hypochlorite during and after completion of root canal preparation. Roots were divided into 4 groups (n = 12) according to the final irrigation regimens: Group 1: 5 mL 17% ethylenediaminetetraacetic acid (EDTA); Group 2: 5 mL 17% EDTA followed by 5 mL 2% chlorhexidine gluconate (CHX); Group 3: 5 mL QMix; and Group 4: 5 mL distilled water as control. All specimens were filled with gutta-percha (GP) and AH Plus. One-millimeter thick four horizontal sections from each root were sliced for bond-strength measurement. Data were statistically analyzed by one-way Anova and Bonferroni tests (p<0.05). Results: Specimens that were irrigated with EDTA/CHX displayed significantly the highest mean bond strength value (p<0.001). Specimens mainly showed a cohesive failure pattern, regardless of final irrigation regime. Conclusion: Using 2% CHX in the final irrigation after 17% EDTA was improved AH Plus’s bond-strength. Final irrigation with EDTA followed by CHX was more effective at improving bond strength of AH Plus compared to QMix that consists EDTA and CH

Evaluation of the antimicrobial activity of mineral trioxide aggregate-based root canal sealer against Enterococcus faecalis

Amaç Bu çalışmanın amacı, epoksi-resin (AH Plus) ve mineral trioksit agregat esaslı (MTA Fillapex) kök kanal dolgu patlarının Enterococcus faecalis'e karşı antimikrobiyal etkinliklerinin karşılaştırılmasıdır.Materyal -MetotEnterococcus faecalis izolatı triptik soy buyyon besiyerinde 12 saatlik kültüründen McFarland standart bulanıklık 0,5 (1.5x 108 CFU/mL) eşeline denk süspansiyonu hazırlandı. Bu süspansiyondan kanlı agar besiyerlerine ekimler yapıldı. Hazırlanan kök kanal dolgu patları besiyerlerinde açılan çukurlara dolduruldu. 24, 48 ve 72. saat inkübasyon sürelerinin sonunda inhibisyon zonları ölçülerek kaydedildi. Veriler Eşleştirilmiş t testi ve Student's t testi kullanılarak istatistiksel olarak analiz edildi. Analizler % 95 güven aralığında gerçekleştirildi (p 0.05). Kök kanal dolgu patlarının inkübasyon sürelerindeki antimikrobiyal etkinlikleri arasında istatistiksel olarak anlamlı bir fark bulundu (p0.05). There was a significant difference between root canal sealers with respect to antimicrobial activity in different incubation times (p<0.05). ConclusionIt was found that both sealers, AH Plus and MTA Fillapex have an antimicrobial activity against Enterococcus faecalis