Assessment of the Separation Incidence of Reciprocating WaveOne Files: A Prospective Clinical Study

• Published in: Journal of endodontics Vol. 40; no. 7; pp. 922 - 924
• Main Authors: Cunha, Rodrigo Sanches, DDS, MSc, PhD, FRCD(C), Junaid, Alanna, BSc, DMD, BSc (Dent), Ensinas, Pablo, DDS, MSc, Nudera, William, DDS, MSc, da Silveira Bueno, Carlos Eduardo, DDS, MSc, PhD
• Format: Journal Article
• Language: English
• Published: United States Elsevier Inc 01.07.2014
• Subjects: Bicuspid - anatomy & histology; Bicuspid - diagnostic imaging; Dental Alloys - chemistry; Dental Pulp Cavity - anatomy & histology; Dental Pulp Cavity - diagnostic imaging; Dentistry; Edetic Acid - therapeutic use; Electrical Equipment and Supplies; Endocrinology & Metabolism; Equipment Design; Equipment Failure - statistics & numerical data; File fracture; Humans; Incidence; Molar - anatomy & histology; Molar - diagnostic imaging; Nickel - chemistry; nickel-titanium reciprocating instrument; Odontometry - instrumentation; Prospective Studies; Radiography; Root Canal Irrigants - therapeutic use; Root Canal Preparation - instrumentation; Root Canal Preparation - statistics & numerical data; separation incidence; separation of files; Sodium Hypochlorite - therapeutic use; Titanium - chemistry; Tooth Apex - anatomy & histology; Tooth Apex - diagnostic imaging; WaveOne; separation incidence; nickel-titanium reciprocating instrument; separation of files; File fracture; WaveOne
• ISSN: 0099-2399; 1878-3554
• DOI: 10.1016/j.joen.2014.03.016

Abstract Introduction Despite metallurgical advancements in the nickel-titanium file manufacturing process, file separation remains a concern. The purpose of this prospective clinical study was to assess the separation incidence of the reciprocating WaveOne file (Dentsply Tulsa Dental Specialties, Tulsa, OK) when used to prepare root canals of posterior teeth. Methods File separation incidence was assessed over an 18-month period in which 4 experienced and calibrated endodontists performed conventional endodontic treatment on posterior teeth using the WaveOne file system. The separation incidence was determined based on both the number of teeth and the number of canals instrumented during this time period. Results A total of 2,215 canals (711 teeth) were treated. Three instruments (two 21.06 and one 25.08) separated during use and were deemed to be irretrievable. The overall instrument separation incidence in relation to the number of canals shaped was found to be 0.13% (0.42% teeth). Conclusions Based on the results of this study, the incidence of endodontic instrument separation when using the WaveOne reciprocating file was considerably low.