Influence of operator's experience level on lifespan of the WaveOne Primary file in extracted teeth

Abstract

ObjectivesThe aim of this study was to assess the influence of operator experience level on the lifespan of the WaveOne Primary file (Dentsply Maillefer, Ballaigues, Switzerland) in extracted teeth.Materials and MethodsModerately curved canals of extracted maxillary and mandibular molars were randomly distributed into 2 groups: experienced and inexperienced operators. Ten files were allocated to each group (n = 10). Each canal was prepared until the working length was reached, and the same file was used to prepare additional canals until it separated. The number of canals prepared before file separation was recorded. The fragment length of each file was measured, and the location of the fragment in the canal was determined. Data were statistically analysed using the independent 2-sample t-test.ResultsThe 2 operators prepared a total of 324 moderately curved canals of maxillary and mandibular molars. There was no significant intergroup difference in the mean number of canals prepared (p = 0.27). The average lifespan of the WaveOne Primary file was 17.1 and 15.3 canals, and the longest lifespan was 25 and 20 canals, when used by experienced and inexperienced operators, respectively. There were no statistically significant intergroup differences in separated fragment length and location.ConclusionsWithin the limitations of this study, operator experience level appears to have no effect on the lifespan of the WaveOne Primary file in preparation of moderately curved canals. Single teeth with multiple canals can be prepared safely even by a novice operator by using a single file.

Fracture incidence of WaveOne Gold files: a prospective clinical study

“…However, this does not invalidate laboratory investigations that provide hypotheses for clinical studies or for ex vivo studies conducted on extracted teeth (Saleh et al . 2013, Pirani et al . 2014, Cassimiro et al .…”

Histological evaluation of the cleaning effectiveness of two reciprocating single-file systems in severely curved root canals: Reciproc versus WaveOne

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Root canal preparation: A literature review and clinical case reports of available materials and techniques

“…15,48 Further reports show that file deformation and life span are not influenced by operator experience or the establishment of a mechanical glide path. [49][50][51] Wan et al claim that reciprocating files undergo decreased stress and should therefore have a greater fatigue resistance because these files travel shorter circumferential distances than do rotary files. 52 Various studies have concluded that the reciprocating motion extends the life span of NiTi endodontic files.…”