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Aust Endod J 2022 May 23. Epub 2022 May 23.

Department of Endodontics and Restorative Dentistry, School of Dental Medicine, University of Zagreb, Zagreb, Croatia.

This study evaluated surface wear and resistance to fracture of reciprocating and novel rotary instruments after use in curved canals. Twenty new instruments (n = 5/each group): Reciproc Blue, WaveOne Gold, XP-endo Shaper (XPS) and TruNatomy were used twice for the instrumentation of simulated curved canals in plastic blocks. The instrumentation was performed according to the manufacturer's instructions at body temperature. Read More

Aust Endod J 2022 May 18. Epub 2022 May 18.

Department of Conservative Dentistry, School of Dentistry, Chosun University, Gwangju, South Korea.

This study investigated the accuracy of two electronic apex locators (DentaPort and Bingo) using heat-treated nickel-titanium files. The true root canal length of 30 single-rooted teeth was determined using K files. Next, the electronically measured length was determined using two nickel-titanium files (ProGlider and HyFlex EDM Glide Path File) with two electronic apex locators at the 'APEX' marks. Read More

Aust Endod J 2022 May 2. Epub 2022 May 2.

Institute of Materials Science and Engineering, Lodz University of Technology, Lodz, Poland.

The aim was to evaluate the morphology of maxillary second premolars. The root canal configurations were classified according to Vertucci and a new system by Ahmed et al. based on CBCT images. Read More

Aust Endod J 2022 Apr 30. Epub 2022 Apr 30.

Department of Endodontics, School of Dentistry, Evangelical University of Goiás, Goiás, Brazil.

The aim of this study was to evaluate the influence of agitation techniques on bacterial reduction in curved root canals. Eighty human mandibular molars were prepared, inoculated with Enterococcus faecalis and incubated at 37°C for 60 days. Then, specimens were randomly separated into two test groups (n = 36) and two control groups (n = 04) according to agitation technique: Passive ultrasonic irrigation (PUI, Irrisonic) and XP-endo Finisher (XPF). Read More

Aust Endod J 2022 04;48(1):6-7

Aust Endod J 2022 Mar 15. Epub 2022 Mar 15.

Department of Endodontics, Faculty of Dentistry, Near East University, Nicosia, North Cyprus, Turkey.

The purpose of the study was to investigate the therapeutic effects of α-lipoic acid (ALA) on an induced-acute pulpitis model in rats. Twenty-four Wistar albino rats were randomly divided into three groups: control, induced-acute pulpitis (PULP) and PULP + ALA groups. In the PULP and PULP + ALA groups, the crowns of the maxillary left incisors were removed horizontally. Read More

Aust Endod J 2022 Apr 10;48(1):98-104. Epub 2022 Mar 10.

Department of Periodontics, Faculty of Dentistry, Hadassah Medical Center, Jerusalem, Israel.

The use of polytetrafluoroethylene (PTFE) tape as the base layer of temporary restorations had gained popularity mainly due to the ease of manipulation. The aim of this study was to assess whether this method changes the potential for bacterial growth and leakage of temporary restorations. The direct contact test and live/dead fluorescent staining were used for comparing Enterococcus faecalis growth and biofilm formation on PTFE, composite, intermediate restorative material (IRM) and Coltosol F. Read More

Aust Endod J 2022 Apr 9;48(1):197-201. Epub 2022 Mar 9.

Department of Pediatric Dentistry, Hacettepe University Faculty of Dentistry, Ankara, Turkey.

Regenerative endodontic treatment (RET) may not be suitable in some necrotic young permanent molars due to coexistent roots with closed and open apices, and/or inadequate apical bleeding in one or more roots. Here, we present a combined treatment approach utilising conventional root canal treatment in the closed-apex roots and RET on the open-apex roots of necrotic young molars. The closed-apex roots of 8 molars received root fillings, and their open-apex roots were treated with a regenerative endodontic procedure. Read More

Aust Endod J 2022 Apr 7;48(1):202-218. Epub 2022 Mar 7.

Department of Endodontics, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia.

This systematic review and meta-analysis evaluated whether single-file endodontic instrumentation systems with the reciprocating type of motion are responsible for more debris extrusion than single-file endodontic instrumentation systems with the full rotational type of motion. Electronic and manual searches were performed following the recommendations of Preferred Reporting Items for Systematic Reviews and Meta-Analysis - PRISMA. We included studies comparing rotary (Neoniti and/ OneShape) versus reciprocating (WaveOne and/ Reciproc) systems. Read More

Aust Endod J 2022 Mar 7. Epub 2022 Mar 7.

Research Office, Faculty of Dentistry, Mahidol University, Bangkok, Thailand.

This study compared shaping ability between two single-file systems and before/after using supplementary file in untouched area, volume of removed dentin, maximum cut depth (the highest cut depth by main file) and remaining thinnest dentin (the thinnest root dentin after preparation). Ribbon-shaped distal canals of mandibular molars were prepared with non-adaptive core (WaveOne Gold) or adaptive core (XP-endo Shaper) files (n = 15/group) and additionally prepared with a supplementary file (XP-endo Finisher), and the shaping ability was investigated using micro-computed tomography. XP-endo Shaper group demonstrated significantly less overall untouched area than WaveOne Gold group (38. Read More

Aust Endod J 2022 Apr 7;48(1):187-196. Epub 2022 Mar 7.

Graduate Endodontics Programme, Faculty of Dentistry, University of Antioquia, Medellín, Colombia.

Root canal treatment and non-vital bleaching of teeth with pulp canal obliteration may represent a complex challenge to the clinician. This report describes the usefulness of the computer-assisted dynamic navigation system for the root canal treatment of two cases of teeth with a history of traumatic injury, extensively obliterated root canals and crown discoloration. Clinical and cone-beam computed tomographic evaluations were completed prior to procedures and 12 months after treatment. Read More

Aust Endod J 2022 Mar 3. Epub 2022 Mar 3.

Faculty of Dentistry, Department of Endodontics, Istanbul Medipol University, Istanbul, Turkey.

This study aimed to determine the intraradicular microbiota of previously root canal-treated teeth with apical periodontitis and to investigate the antibacterial effectiveness of different intracanal medicaments. Sixteen patients with post-treatment apical periodontitis were allocated into two groups according to the intracanal medicament used: calcium hydroxide (CH) and 2% chlorhexidine gluconate gel (CHX) group. Total bacterial loads, as well as the amount of Enterococcus faecalis (E. Read More

Aust Endod J 2022 Mar 1. Epub 2022 Mar 1.

Department of Clinical Sciences, College of Veterinary Medicine, King Faisal University, Al Hofuf, Saudi Arabia.

The study aims to investigate the quality of dentin barriers and pulp reaction to EndoSequence Root Repair Material (ERRM) combined with low-level laser application. In eight dogs, pulps were exposed via class V, half of the samples received low-level diode laser at 870 nm. Thereafter, cavities were capped with fast-set or regular-set ERRM. Read More

Aust Endod J 2022 Mar 1. Epub 2022 Mar 1.

Centre for Oral Immunobiology and Regenerative Medicine and Centre for Oral Clinical Research, Institute of Dentistry, Queen Mary University London (QMUL), London, UK.

The objective of this study was to evaluate the biological effects and odonto/osteogenic differentiation potential of Biodentine, NeoMTA Plus and TheraCal LC in tooth germ-derived stem cells (TGSCs). TGSCs were exposed to the material extracts. Biocompatibility was tested with MTS cell proliferation assay. Read More

Aust Endod J 2022 Mar 1. Epub 2022 Mar 1.

Department of Conservative Dentistry and Endodontics, SRM Dental College, Chennai, India.

The aim of this study was to evaluate the effect of calcium hydroxide (CH) and niobium pentoxide (NP) pretreatment on pH, dentin microhardness and sealing of Mineral Trioxide Aggregate (MTA; Angelus). The pH of CH, NP and CH-NP (3:1) was evaluated in neutral and acidic simulated tissue fluid over 28 days. The Vickers microhardness was measured in forty 4 mm coronal root slices filled with pretreatment materials stored in medium for 1, 7, 28 days. Read More

Aust Endod J 2022 Apr 23;48(1):32-36. Epub 2021 Dec 23.

Dental Faculty Department of Endodontics, Medeniyet University, Istanbul, Turkey.

We investigated the efficiency of Endosonic Blue, EDDY, Ultra X and EndoActivator in removing calcium hydroxide from artificially created apical grooves in root canal walls. In Materials and Methods: A total of 60 single-root maxillary central incisors, root canals were created and the roots were divided into two longitudinal parts. In the most suitable root piece, artificial grooves were created in the apical section and filled with calcium hydroxide. Read More

Aust Endod J 2021 Dec 23. Epub 2021 Dec 23.

Department of Stomatology, Dental School, Federal University of Goiás, Goiás, Brazil.

Apical periodontitis shows radiographic signs such as widening of the periodontal ligament and periapical radiolucency, which differ in extent depending on the stage of the lesion. However, other lesions can be associated with or coincidental to the apical region, representing developmental lesions and benign or malignant tumours. This article describes three cases of malignant tumours, a central mucoepidermoid carcinoma (CMEC), a chondroblast osteosarcoma and an osteosarcoma of the jaw (OSJ) that presented as periapical lesions. Read More

Aust Endod J 2022 Apr 21;48(1):27-31. Epub 2021 Dec 21.

Department of Restorative Dentistry, University of Passo Fundo, Passo Fundo, Brazil.

The aim of this study was to evaluate the effect of glycolic acid (GA) and EDTA on dentin mechanical properties. For the cohesive strength, flexural strength and fracture strength tests, the hourglass of root dentin, dentin sticks and roots standardised to 1 mm thickness were used respectively. ANOVA and Tukey tests were used for statistical analysis (P < 0. Read More

Aust Endod J 2021 Dec 20. Epub 2021 Dec 20.

Department of Dental Materials, Islamabad Medical and Dental College, Islamabad, Pakistan.

This study aimed to determine the frequency of the middle mesial canal in the mandibular first molars and its association with various anatomical features. Two experienced endodontists evaluated 149 CBCT images, containing n = 298 mandibular first molars and n = 298 mandibular second molars. Binary logistic regression was used to explore the relationship between the presence of middle mesial canal and other independent variables. Read More

Aust Endod J 2021 Dec 20. Epub 2021 Dec 20.

Vocational School of Health Services, Department of Dental Hygiene, Kirikkale University, Kirikkale, Turkey.

Due to favourable biological and physical properties, calcium silicate-based cements (CSCs) are biocompatible materials used widely for vital pulp therapies. Sealing efficacy between the adhesive system and CSC determines the clinical success of treatment. This study aimed to evaluate the shear bond strength (SBS) of CSC to composite resin with different adhesive systems and to analyse the CSC-composite interface. Read More

Aust Endod J 2021 Dec 20. Epub 2021 Dec 20.

Private Practice, Rome, Italy.

This study analysed the bioceramic sealer cleaning ability of two chemo-mechanical systems in intact and restored teeth. Thirty-two single-rooted teeth were used, and half of them restored with a pre-endodontic composite restoration (PCR). All samples were instrumented with a size 40 Reciproc Blue file and filled with BioRoot RCS. Read More

Aust Endod J 2022 Apr 20;48(1):116-120. Epub 2021 Dec 20.

Division of Endodontics, Department of Restorative Dentistry and Periodontology, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand.

This study aimed to investigate the effect of the heat-based obturation technique on the push-out bond strength of the classical bioceramic and new HiFlow sealer. Fifty single-rooted human mandibular premolars were obturated using one of the following techniques: (1) BC-SC; (2) BC-W; (3) HiFlow-SC; (4) HiFlow-W; and (5) AH Plus-W. Following obturation, specimens were sectioned into 1-mm-thick root slices 4 and 8 mm from the working length and were subjected to a push-out bond test using a universal testing machine and examined for their modes of failure under an inverted phase-contrast microscope. Read More

Aust Endod J 2021 Dec 20. Epub 2021 Dec 20.

Department of Operative Dentistry and Endodontics, Faculty of Dentistry, Mahidol University, Bangkok, Thailand.

This study compared the percentage reduction of total obturation materials, gutta-percha and sealer, using two rotary file systems with/without solvent in retreating C-shaped root canals and to evaluate the effect of the solvent on instrument separation. C-shaped root canals were scanned using micro-CT to identify the root canal morphology and randomly assigned to four groups (n = 12). Retreatment was performed using ProTaper Universal Retreatment (PTUR) or XP-endo systems with/without solvent. Read More

Aust Endod J 2021 Dec 17. Epub 2021 Dec 17.

Endodontic Department, Faculty of Dentistry, Cairo University, Cairo, Egypt.

To evaluate the sealer penetration after applying dual rinse irrigant in comparison with sodium hypochlorite and 17% EDTA. Mandibular premolars were prepared by ProTaper Next and irrigated with NaOCl, NaOCl/Dual Rinse or NaOCl/EDTA and then obturated with a single-cone technique and bioceramic-based. Samples were observed using confocal laser microscopy, and the maximum depth of penetration was measured, as well as the percentage of sealer coating the canal wall and the penetration area of the sealer. Read More

Aust Endod J 2022 Apr 17;48(1):77-81. Epub 2021 Dec 17.

Department of Endodontics, School of Dentistry, Rio de Janeiro State University (UERJ), Rio de Janeiro, Brazil.

This study evaluated the penetration of the irrigant subject to activation after performing retro-preparation in endodontic microsurgery. Forty mandibular premolars were prepared and filled. Subsequently, 1 mm from the root apex was cut using a multi-blade bur and the retro-preparation was performed. Read More

Aust Endod J 2022 Apr 17;48(1):51-57. Epub 2021 Dec 17.

Faculty of Medicine, Medical Education, University of New South Wales, Sydney, New South Wales, Australia.

Background: With dental trauma education not commonly offered in medicine programmes, offering an online learning course may fill the knowledge deficiency for medical students. The aim of this study is to evaluate medical students' perceptions of an online dental trauma course.

Material And Methods: This was a cross-sectional questionnaire study conducted among medical students at an Australian University. Read More

Aust Endod J 2021 Dec 10. Epub 2021 Dec 10.

Discipline of Endodontology, Faculty of Health Sciences, Adelaide Dental School, The University of Adelaide, Adelaide, South Australia, Australia.

The varicella zoster virus as an aetiological agent for endodontic disease is not a well-recognised entity despite several published case reports. While advances in DNA molecular analysis techniques (PCR) have contributed to the current understanding of the potential role of the varicella zoster virus in the initiation and progression of endodontic disease, a review indicates a need for ongoing research. Case reports are presented of two female patients with a history of herpes zoster who developed pulp necrosis, with one patient progressing to apical periodontitis. Read More

Aust Endod J 2022 Apr 29;48(1):65-71. Epub 2021 Nov 29.

Department of Biomedical Applications, Institute of Laser for Postgraduate Studies, University of Baghdad, Baghdad, Iraq.

To measure the transmitted laser power in the coronal, middle and apical root thirds during vertical and horizontal irradiation of laser. 14 mm length whole roots and longitudinal root sections were irradiated using a 940 nm diode laser with 0.5 W in continuous mode for 5 s. Read More

Aust Endod J 2021 Nov 23. Epub 2021 Nov 23.

Department of Conservative Dentistry, School of Dentistry, Dental Research Institute, Pusan National University, Yangsan, Korea.

This study evaluated the perceived vibration, noise and discomfort levels associated with two nickel-titanium file systems with different kinetics; reciprocating motion (REC) using WaveOne Gold and continuous rotation motion (CON) using ProTaper NEXT. Forty roots with two canals from maxillary premolar and molar of 40 patients were included. Root canals were instrumented using each system for each canal. Read More

Aust Endod J 2022 Apr 14;48(1):82-90. Epub 2021 Nov 14.

Department of Endodontics, Faculty of Dentistry, Sivas Cumhuriyet University, Sivas, Turkey.

The study evaluated sealer penetration after calcium hydroxide (Ca(OH) ) removal from the root canals. Sixty single-rooted mandibular premolars were divided into six groups. Ca(OH) paste placed into the root canals except for the control group (CG) was removed using the following irrigation techniques: conventional needle irrigation (CNI), EndoActivator (EA), EndoVac (EV), passive ultrasonic irrigation (PUI) and photon-induced photoacoustic streaming (PIPS) technique. Read More