Prevalence of Dentinal Defects after Root Canal Preparations in Molars with Reciproc and WaveOne Systems

Palmira Gomes Amaral, Rosenês Lima dos Santos, Juan Ramon Salazar-Silva, André Ulisses Dantas Batista, Paulo Rogério Ferreti Bonan

Abstract


Objective: To evaluate the prevalence of dentin defects, including partial and complete cracks and fractures, after root canal preparation in molars with Reciproc and WaveOne reciprocating instruments. Material and Methods: Fifty mandibular first and second molars with mature apices were selected to endodontic in vitro instrumentation. Ten teeth were unprepared and served as the control, and the remaining forty teeth were divided into two groups, being twenty corresponding to each reciprocating system. Reciproc and WaveOne systems were used in a reciprocating working motion, under the same conditions, to prepare the two mesial canals. Roots were then sectioned 2, 4 and 6 mm from the apex, and the cut surface was observed under a microscope using 20-fold magnification and checked for the presence of fractures and incomplete cracks. Results: none of the evaluated groups presented fractures, and the control group showed no incomplete cracks. Overall evaluation showed statistical differences between these two groups and the control group (p=0.017) for the prevalence of incomplete cracks, but no significant differences were obtained between Reciproc and WaveOne groups (p>0.05). Reciproc group presented more incomplete cracks on 4-mm sections compared with the control group on the same section (p=0.0326). Conclusion: Root canal preparation with both reciprocating instruments resulted in incomplete cracks, but not fractures. At the level of 4 mm from the apex of the canals, the Reciproc system produced significantly more incomplete cracks. Considering both systems, WaveOne utilization resulted in lesser structural alterations on dentin considering the middle portion of the roots.


Keywords


dentin; instrumentation; endodontics

Full Text:

PDF

References


Yoldas O, Yilmaz S, Atakan G, Kuden C, Kasan Z. Dentinal microcrack formation during root canal preparations by different NiTi rotary instruments and the self-adjusting file. J Endod 2012; 38(2):232-5.

Aydin B, Kose T, Caliskan MK. Effectiveness of Hero 642 versus Hedstrom files for removing gutta-percha fillings in curved root canals: an ex vivo study. Int Endod J 2009; 42 (11):1050-6.

Cujé J, Bargholz C, Hulsmann M. The outcome of retained instrument removal in a specialist practice. Int Endod J 2010; 43(7):545-54.

Tsesis I, Rosenberg E, Faivishevsky V, Kfir A, Katz M, Rosen E. Prevalence and associated periodontal status of teeth with root perforation: a retrospective study of 2,002 patients’ medical records. J Endod 2010; 36(5):797-800.

Tsesis I, Rosen E, Tamse A, Taschieri S, Kfir A. Diagnosis of vertical root fractures in endodontically treated teeth based on clinical and radiographic indices: a systematic review. J Endod 2010; 36(9):1455-8.

Burklein S, Hinschitza K, Dammaschke T, Schafer E. Shaping ability and cleaning effectiveness of two single-file systems in severely curved root canals of extracted teeth: Reciproc and WaveOne versus Mtwo and ProTaper. Int Endod J 2012; 45(5):449-61.

Gambarini G, Grande NM, Plotino G, Somma F, Garala M, De Luca M, et al. Fatigue resistance of engine-driven rotary nickel-titanium instruments produced by new manufacturing methods. J Endod 2008; 34(8):1003-5.

Schafer E, Lau R. Comparison of cutting efficiency and instrumentation of curved canals with nickel-titanium and stainless-steel instruments. J Endod 1999; 25(6):427-30.

Vaudt J, Bitter K, Neumann K, Kielbassa AM. Ex vivo study on root canal instrumentation of two rotary nickel-titanium systems in comparison to stainless steel hand instruments. Int Endod J 2009; 42(1):22-33.

Burklein S, Tsotsis P, Schafer E. Incidence of dentinal defects after root canal preparation: Reciprocating versus rotary instrumentation. J Endod 2013; 39(4):501-4.

El Nasr HMA, El Kader KGA. Dentinal damage and fracture resistance of oval roots prepared with single-file systems using different kinematics. J Endod 2014; 40(6):849-51.

Liu R, Hou BX, Wesselink PR, Wu M, Shemesh H. The incidence of root microcracks caused by 3 different single-file systems versus the protaper system. J Endod 2013; 39(8):1054-6.

Strawn SE, White JM, Marshall GW, Gee L, Goodis HE, Marshall SJ. Spectroscopic changes in human dentine exposed to various storage solutions-short term. J Dent 1996; 24(6):417-23.

Schneider SW. A comparison of canal preparations instraight and curved root canals. Oral Surg 1971; 32(2):271-5.

Wilcox LR, Roskelley C, Sutton T. The relationship of root canal enlargement to finger-spreader induced vertical root fracture. J Endod 1997; 23(8):533-4.

Castelló-Escrivá R, Alegre-Domingo T, Faus-Matoses V, Román-Richon S, Faus-Llácer VJ. In vitro comparison of cyclic fatigue resistance of protaper, waveone, and twisted files. J Endod 2012; 38(11):1521-4.

Kyomen SM, Caputo AA, White SN . Critical analysis of the balanced force technique in endodontics. J Endod 1994; 20(7):332-7.

Plotino G, Grande NM, Testarelli L, Gambarini G. Cyclic fatigue of Reciproc and WaveOne reciprocating instruments. Int Endod J 2012; 45(7):614-8.

Roane JB, Sabala C. Clockwise or counterclockwise. J Endod 1984; 10(8):349-53.

Roane JB, Sabala CL, Duncanson Jr MG. The ‘‘balanced force’’ concept for instrumentation of curved canals. J Endod 1985; 11(5):203-11.

Southard DW, Oswald RJ, Natkin E. Instrumentation of curved molar root canals with the Roane technique. J Endod 1987; 13(10):479-89.

Shemesh H, Bier CAS, Wu M, Tanomaru-Filho M, Wesselink PR. The effects of canal preparation and filling on the incidence of dentinal defects. Int Endod J 2009; 42(3):208-13.

Bier CAS, Shemesh H, Tanomaru-Filho M, Wesselink PR, Wu M. The ability of different nickel-titanium rotary instruments to induce dentinal damage during canal preparation. J Endod 2009; 35(2):236-8.

Kim H, Lee M, Yum J, Versluis A, Lee C, Kim B. Potential relationship between design of nickel-titanium rotary instruments and vertical root fracture. J Endod 2010; 36(7):1195-9.

Shemesh H, Roeleveld AC, Wesselink PR, Wu M. Damage to root dentin during retreatment procedures. J Endod 2011; 37(1):63-6.




PBOCI IS A MEMBER OF CROSSREF AND ALL THE CONTENT OF ITS JOURNALS ARE LINKED BY DOIS THROUGH CROSSREF.