Can Type of Instrumentation and Activation of the Final Irrigant Improve the Obturation Quality in Oval Root Canals? A Push-Out Bond Strength Study

Ajinkya M Pawar; Anda Kfir; Zvi Metzger; Anuj Bhardwaj; Yeyen Yohana; Dian Agustin Wahjuningrun; Alexander Maniangat Luke; Bhaggyashri A Pawar

doi:10.3390/biology11010059

Can Type of Instrumentation and Activation of the Final Irrigant Improve the Obturation Quality in Oval Root Canals? A Push-Out Bond Strength Study

Biology (Basel). 2022 Jan 1;11(1):59. doi: 10.3390/biology11010059.

Authors

Ajinkya M Pawar¹, Anda Kfir², Zvi Metzger², Anuj Bhardwaj³, Yeyen Yohana⁴, Dian Agustin Wahjuningrun⁴, Alexander Maniangat Luke^{5

6}, Bhaggyashri A Pawar⁷

Affiliations

¹ Department of Conservative Dentistry and Enododntics, Nair Hospital Dental College, Mumbai 400008, India.
² Department of Endodontology, The Goldschleger School of Dental Medicine, Tel Aviv 69978, Israel.
³ Department of Conservative Dentistry and Endodontics, College of Dental Sciences & Hospital, Indore 453331, India.
⁴ Department of Conservative Dentistry, Faculty of Dental Medicine, Universitas Airlingga, Surabaya 60132, East Java, Indonesia.
⁵ Department of Clinical Science, College of Dentistry, Ajman University, Al-Jurf, Ajman 346, United Arab Emirates.
⁶ Center of Medical and Bio-allied Health Sciences Research, Ajman University, Al-Jurf, Ajman 346, United Arab Emirates.
⁷ Division of District Early Intervention Centre, Department of Dentistry, Thane Civil Hospital, Thane 400601, India.

Abstract

To appraise the outcome of file systems and activation of the final irrigant on the push-out bond strength of root fillings in oval canals. Single-rooted mandibular premolars (n = 180) with oval canals were divided into three groups (n = 60) for instrumentation: ProTaper Next (PTN), WaveOne (WO), and Self-adjusting File (SAF). The specimens were further divided into subgroups (n = 20) and subjected to final irrigation with activation by EndoActivator or passive ultrasonic irrigation or without activation. Then, the specimens were again subdivided (n = 10) and obturated with gutta-percha and AH Plus (GP-AH) or C-Point with EndoSequence bioceramic sealer (C-EBC). One-millimeter-thick horizontal slices were cut from the apical third of the root, 5 mm from the apex, and subjected to push-out bond strength (BS) testing. Specimens for which SAF was used exhibited higher BS values than those for which PTN or WO was used (p < 0.05). Activation of the final irrigation did not affect the BS of the root fillings. Root fillings made of C-EBC presented a higher BS than those made of GP-AH (p < 0.05). Adhesive failure was more common with specimens instrumented using PTN and WO. Root canals instrumented with SAF, showed the highest bond strength values for both root filling materials. The C-EBC produced significantly higher bond strength values than those of the GP-AH.

Keywords: AH Plus; C-Points; EndoActivator; EndoSequence bioceramic sealer; SAF; instrumentation; oval canals; passive ultrasonic irrigation; push-out bond strength.