Evaluation of fracture resistance of roots-filled with various root canal sealers at different time periods

Year 2019, Volume: 53 Issue: 1, 6 - 11, 31.01.2019

Emel Uzunoglu Özyürek , Sevinç Aktemur Türker

Abstract

Purpose

The reinforcement effect of 3 various root canal sealers (AH 26, MTA Plus sealer and

BioRoot RCS) and gutta-percha at different time periods (1 week and 1 month) were

evaluated in the present study.

Materials and Methods

Single-rooted, single-canalled, cracks-free 80 mandibular premolars were

decoronated to a length of 13mm. Group PC (positive control, n=10): samples were

left unprepared and unfilled. Seventy samples were prepared by using the ProTaper

Rotary System up to F4. Group NC (negative control, n=10): samples were left

unfilled. Remaining 60 samples were assigned into 3 groups; Group 1: AH 26 + F4

gutta-percha (GP); Group 2: MTA Plus sealer + F4 GP and Group 3: BioRoot RCS + F4

GP. Filled samples were divided into subgroups according to storage time: Samples

in Groups 1A, 2A, and 3A were stored for 1 week; while Groups 1B, 2B and 3B were

stored for 1 month at 100% humidity to allow the complete setting of the sealers

(n=10, for each). A universal testing machine at a crosshead speed of 1.0 mm/min

was used for fracture testing. For each specimen, the force at the time of fracture

was recorded and the data were analyzed statistically.

Results

The highest fracture resistance values were obtained in Group PC, while the lowest

values were obtained in Group NC. Groups PC and NC were statistically different

from each other and from other groups, regardless of time (p<0.05). Fracture

resistance values of Group AH 26/GP were statistically different from MTA Plus

sealer/GP (p<0.05) and were statistically similar with BioRoot RCS/GP, irrespective of

time. Within group comparisons revealed that there were no statistically differences

between samples filled with same sealer at different time periods.

Conclusion

Root canal preparation caused decreased fracture resistance. All sealers increased

the force values needed to fracture the filled samples compared to unfilled ones.

Time factor had no effect on the fracture resistance values.

Keywords

Calcium silicate sealer, root canal obturation, vertical root fracture, time, endodontics

References

• Johnson ME, Stewart GP, Nielsen CJ, Hatton JF. Evaluation of root reinforcement of endodontically treated teeth. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2000; 90(3): 360–364. [CrossRef ]
• Zandbiglari T, Davids H, Schäfer E. Influence of instrument taper on the resistance to fracture of endodontically treated roots. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2006; 101(1): 126–131. [CrossRef ]
• Apicella MJ, Loushine RJ, West LA, Runyan DA. A comparison of root fracture resistance using two root canal sealers. Int Endod J 1999; 32(5): 376–380. [CrossRef ]
• Jainaen A, Palamara JEA, Messer HH. The effect of resinbased sealers on fracture properties of dentine. Int Endod J 2009; 42(2): 136–143. [CrossRef ]
• Sağsen B, Ustün Y, Pala K, Demırbuğa S. Resistance to fracture of roots filled with different sealers. Dent Mater J 2012; 31(4): 528–532. [CrossRef ]
• Topçuoğlu HS, Tuncay Ö, Karataş E, Arslan H, Yeter K. In vitro fracture resistance of roots obturated with epoxy resin-based, mineral trioxide aggregate-based, and bioceramic root canal sealers. J Endod 2013; 39(12): 1630–1633. [CrossRef ]
• Guneser MB, Akman M, Kolcu İB, Eldeniz AU. Fracture resistance of roots obturated with a novel calcium silicate-based endodontic sealer (BioRoot RCS). J Adhes Sci Tech 2016; 30(22): 2420-2428. [CrossRef ]
• El-Ma’aita AM, Qualtrough AJ, Watts DC. Resistance to vertical fracture of MTA-filled roots. Dent Traumatol 2014; 30(1): 36–42. [CrossRef ]
• Camilleri J, Pitt Ford TR. Evaluation of the effect of tracer pH on the sealing ability of glass ionomer cement and mineral trioxide aggregate. J Mater Sci Mater Med 2008; 19(8): 2941–2948. [CrossRef ]
• Sarkar NK, Caicedo R, Ritwik P, Moiseyeva R, Kawashima I. Physicochemical basis of the biologic properties of mineral trioxide aggregate. J Endod 2005; 31(2): 97–100. [CrossRef ]
• Atmeh AR, Chong EZ, Richard G, Festy F, Watson TF. Dentincement interfacial interaction: calcium silicates and polyalkenoates. J Dent Res 2012; 91(5): 454–459. [CrossRef ]
• Camilleri J. Sealers and warm gutta-percha obturation techniques. J Endod 2015; 41(1): 72–78. [CrossRef ]
• Xuereb M, Vella P, Damidot D, Sammut CV, Camilleri J. In situ assessment of the setting of tricalcium silicate-based sealers using a dentin pressure model. J Endod 2015; 41(1): 111–124. [CrossRef ]
• Viapiana R, Moinzadeh AT, Camilleri L, Wesselink PR, Tanomaru Filho M, Camilleri J. Porosity and sealing ability of root fillings with gutta-percha and BioRoot RCS or AH Plus sealers. Evaluation by three ex vivo methods. Int Endod J 2016; 49(8): 774–782. [CrossRef ]
• Camilleri J, Formosa L, Damidot D. The setting characteristics of MTA Plus in different environmental conditions. Int Endod J 2013; 46(9): 831–840. [CrossRef ]
• Formosa L, Mallia B, Camilleri J. A quantitative method for determining the antiwashout characteristics of cement-based dental materials including mineral trioxide aggregate. Int Endod J 2013; 46(2): 179–186. [CrossRef ]
• DeLong C, He J, Woodmansey KF. The effect of obturation technique on the push-out bond strength of calcium silicate sealers. J Endod 2015; 41(3): 385–388. [CrossRef ]
• Goldberg F. Kaplan A, Roitman M, Manfré S, Picca M. Reinforcing effect of a resin glass ionomer in the restoration of immature roots in vitro. Dent Traumatol 2002; 18(2): 70–72. [CrossRef ]
• Uzun I, Arslan H, Doğanay E, Güler B, Keskin C, Çapar İD. Fracture resistance of endodontically treated roots with oval canals restored with oval and circular post. J Endod 2015; 41(4): 539- 543. [CrossRef ]
• Sim TP, Knowles JC, Ng YL, Shelton J, Gulabivala K. Effect of sodium hypochlorite on mechanical properties of dentine and tooth surface strain. Int Endod J 2001; 34(2): 120–132. [CrossRef ]
• Lee KW, Williams MC, Camps JJ, Pashley DH. Adhesion of endodontic sealers to dentin and gutta-percha. J Endod 2002; 28(10): 684–688. [CrossRef ]
• Moinzadeh AT, Zerbst W, Boutsioukis C, Shemesh H, Zaslansky P. Porosity distribution in root canals filled with gutta percha and calcium silicate cement. Dent Mater 2015; 31(9): 1100-1108. [CrossRef ]
• Dawood AE, Parashos P, Wong RH, Reynolds EC, Manton DJ. Calcium silicate-based cements: composition, properties, and clinical applications. J Investig Clin Dent 2017; 8(2): doi: 10.1111/ jicd.12195. [CrossRef ]
• Dimitrova-Nakov S, Uzunoglu E, Ardila-Osorio H, Baudry A, Richard G, Kellermann O, Goldberg M. In vitro bioactivity of Bioroot™ RCS, via A4 mouse pulpal stem cells. Dent Mater 2015; 31(11): 1290-1297. [CrossRef ]
• Khalil I, Naaman A, Camilleri J. Properties of Tricalcium Silicate Sealers. J Endod 2016; 42(10): 1529-1535. [CrossRef ]
• Gandolfi MG, Siboni F, Primus CM, Prati C. Ion release, porosity, solubility, and bioactivity of MTA Plus tricalcium silicate. J Endod 2014; 40(10): 1632-1637. [CrossRef ]
• Formosa LM, Mallia B, Camilleri J. Mineral trioxide aggregate with anti-washout gel - properties and microstructure. Dent Mater 2013; 29(3): 294–306. [CrossRef ]
• Hoppe CB, Scarparo RK, Böttcher DE, Leitune VC, Collares FM, Samuel SM, Grecca FS. Thermocompaction decreases long-term push-out bond strength of methacrylate-based sealers. Acta Odontol Scand 2015; 73(4): 292-297. [CrossRef ]
• Türker SA, Uzunoğlu E. Effect of powder-to-water ratio on the push-out bond strength of white mineral trioxide aggregate. Dent Traumatol 2016; 32(2): 153-155. [CrossRef ]