A.M. Pawar
Endodontology 2020;32:67-71
ABSTRACT
PURPOSE: The present study evaluated the centering ability of rotary ProTaper NEXT (PTN; Dentsply Tulsa Dental, Tulsa, OK), reciprocatingThe present study evaluated the centering ability of rotary ProTaper NEXT (PTN; Dentsply Tulsa Dental, Tulsa, OK), reciprocatingWaveOne (WO; Dentsply Maillefer, Ballaigues, Switzerland) and vibratory Self‑Adjusting File (SAF; ReDent Nova, Ràanana, Israel) when usedfor instrumenting mandibular premolars with oval canals.
MATERIALS AND METHODS: Ninety oval canals (confirmed using radiovisography, buccolingual dimensions were × 2.5 the mesiodistal canalNinety oval canals (confirmed using radiovisography, buccolingual dimensions were × 2.5 the mesiodistal canaldimensions) were acquired, preinstrumentation cone‑beam computed tomography (CBCT) was taken, and divided into three groups (n = 30)for root canal instrumentation: group 1 – PTN; Group 2 – WO; and Group 3 – SAF. The samples were then subjected to postinstrumentationCBCT. The pre‑ and postinstrumentation scans were compared at 3 mm, 6 mm, and 9 mm from the apex to obtain the centering ability ratio ofthe three files. The data collected were analyzed using the one‑way analysis of variance test and Duncan’s multiple comparison tests.
RESULTS: The ratio obtained at 6 mm and 9 mm from the apex did not differ for the mesiodistal dimensions (P > 0.05), but a significant differenceThe ratio obtained at 6 mm and 9 mm from the apex did not differ for the mesiodistal dimensions (P > 0.05), but a significant differencewas observed when the buccolingual dimensions were considered (P < 0.001). The PTN and WO instrumentation were associated with a veryhigh ratio for buccolingual dimensions. However, SAF instrumentation resulted in well‑centered preparation for both the dimensions at 6 mmand 9 mm (P < 0.001). At 3 mm from the apex, the files did not differ in canal preparation (P > 0.05).
CONCLUSION: The SAF instrumentation results in centered preparation when used for instrumenting nonround root canals.
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