CC BY-NC-ND 4.0 · Eur J Dent 2015; 09(02): 189-193
DOI: 10.4103/1305-7456.156804
Original Article
Dental Investigation Society

Fracture strength of roots instrumented with three different single file systems in curved root canals

Bilge Gulsum Nur
1  Departments of Pedodontics, Faculty of Dentistry, Sifa University, Izmir, Turkiye
,
Evren Ok
2  Department of Endodontics, Faculty of Dentistry, Sifa University, Izmir, Turkiye
,
Mustafa Altunsoy
1  Departments of Pedodontics, Faculty of Dentistry, Sifa University, Izmir, Turkiye
,
Mehmet Tanriver
1  Departments of Pedodontics, Faculty of Dentistry, Sifa University, Izmir, Turkiye
,
Ismail Davut Capar
3  Department of Endodontics, Faculty of Dentistry, Katip Çelebi University, Izmir, Turkiye
› Author Affiliations
Further Information

Correspondence:

Dr. Evren Ok

Publication History

Publication Date:
04 September 2019 (online)

 

ABSTRACT

Objective: The aim of this study was to compare the fracture strength of roots instrumented with three different single file rotary systems in curved mesial root canals of maxillary molars. Materials and Methods: Curvatures of 25°–35° on mesial roots of 60 maxillary molar teeth were sectioned below the cementoenamel junction to obtain roots 11 mm in length. The roots were balanced with respect to buccolingual and mesiodistal diameter and weight. They were distributed into three experimental groups and one control group (no instrumentation) (n = 15): Reciproc rotary file (R25, VDW, Munich, Germany), WaveOne Primary rotary file (Dentsply Tulsa Dental Specialties, Tulsa, UK) and OneShape (Micro-Mega, Besancon, France) rotary file. Vertical load was applied until fracture occurred. Data were statistically analyzed using one-way analysis of variance test (P < 0.05). Results: The mean fracture load was 412 ± 72 Newton (N) for the control group, 395 ± 69 N for the Reciproc group, 373 ± 63 N for the WaveOne group and 332 ± 68 N for the OneShape group. The fracture load differences among three experimental groups were not statistically significant (P > 0.05.) Whereas, the fracture loads of control and OneShape groups were significantly different (P = 0.012). Conclusions: Fracture resistance of the roots instrumented with WaveOne and Reciproc file systems were similar to the control group whereas it was observed that OneShape rotary file systems enhance the fracture strength of standardized curved roots when compared with the control group.


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Conflict of Interest

None declared.


Correspondence:

Dr. Evren Ok