The prevalence of oval‐shaped root canals: A morphometric study using cone‐beam computed tomography and image analysis software

Papic, Mirjana; Papić, Miloš; Živanović, Suzana; Vuletic, Miona; Zdravković, Dejan; Misic, Aleksandra; Kovačević, Marina Miletić; Popović, Milica

doi:10.1111/aej.12554

Cited by 4 publications

(3 citation statements)

References 32 publications

(100 reference statements)

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“…Moreover, the debris and necrotic pulp tissues trapped in these hard-to-reach areas may block the entry of the irrigant flow, thus weakening the disinfection effect of chemomechanical preparation [2]. According to Jou et al, the oval-shaped canal was defined as having the maximal initial horizontal dimensions greater than the minimal initial dimension (up to two times more) at different levels of the canal [3].Oval-shaped canals were present in 45% at the apical, 50% at the middle and 56% at the coronal level of all teeth [4]. Due to the inconsistency between the irregular morphology and the round preparations provided by rotary instrumentation systems, 59.6-79.9% of the dentinal walls remain untouched during root canal preparation of oval-shaped canals [1,5].…”

Section: Introductionmentioning

confidence: 99%

Evolution of the combined effect of different irrigation solutions and activation techniques on the removal of smear layer and dentin microhardness in oval-shaped root canal – An in-vitro study

Shi

Jie

Yang

et al. 2022

Bosn J of Basic Med Sci

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The aim of this in vitro study was to evaluate the effect of three final irrigants, namely QMix, MTAD and EDTA, combined with three irrigation techniques, namely conventional needle irrigation (CNI), passive ultrasonic irrigation (PUI) and photon-induced photoacoustic streaming (PIPS), on smear layer removal, dentin mineral content and microhardness in oval-shaped canals. 130 decoronated premolars with single, oval root canals were equally divided into1 blank control group and 12 treatment groups (n=10) according to the final irrigation protocols. Roots in treatment groups were instrumented with ProTaper Gold to size F4 and subjected to final irrigation. Smear layer removal was assessed by using a four-level scoring system under an environmental scanning electron microscope. Energy dispersive X-ray spectroscopy was performed to measure the dentin mineral content. Dentin microhardness was measured by Knoop microhardness testing. Statistical analysis of the data was performed by using Kruskal-Wallis test, followed by Dunn’s post hoc test with Bonferroni correction. PUI- and PIPS-activated QMix and EDTA removed smear layer more effectively than MTAD groups (p<0.05). Regarding the dentin mineral content and microhardness, QMix groups yielded the least calcium (Ca), phosphorus (P) and Ca/P ratio, followed by EDTA groups and MTAD groups (p<0.05). QMix groups produced significantly lower dentin microhardness values and higher hardness reduction percentages than MTAD groups (p<0.05). Within the limitations of the present study, it was concluded that QMix and EDTA were superior to MTAD in smear layer removal, especially when activated by PUI and PIPS, but these agents produced more pronounced effect on dentin mineral content and microhardness than MTAD.

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Section: Introductionmentioning

confidence: 99%

Evolution of the combined effect of different irrigation solutions and activation techniques on the removal of smear layer and dentin microhardness in oval-shaped root canal – An in-vitro study

Shi

Jie

Yang

et al. 2022

Bosn J of Basic Med Sci

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“…The definition of oval-shaped root canals was based on previous studies [ 4 , 5 ]. Teeth with previous endodontic treatment, fractures, resorption, open apices, or a curvature greater than 10° were excluded.…”

Section: Methodsmentioning

confidence: 99%

“…However, the intricate morphologies of root canals, such as irregular cross-sections, isthmus, and fins, pose a great challenge [ 1 , 2 , 3 ]. Oval-shaped cross-sections are frequently observed in root canals, with a high incidence reported, which are more common than circular cross-sections [ 4 , 5 , 6 ]. The traditional nickel titanium (NiTi) rotary instruments have a cutting geometry that is not optimal for these shapes.…”

Section: Introductionmentioning

confidence: 99%

Cleaning and Disinfecting Oval-Shaped Root Canals: Ex Vivo Evaluation of Three Rotary Instrumentation Systems with Passive Ultrasonic Irrigation

Wang

Bao

et al. 2023

Medicina

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Background and Objectives: Successful root canal treatment depends on the thorough removal of biofilms through chemomechanical preparation. This study aimed to investigate and compare the cleaning and disinfecting efficiency of oval-shaped root canals using XP-endo Shaper (XPS), ProTaper Next (PTN), and HyFlex CM (HCM) in combination with passive ultrasonic irrigation (PUI). Materials and Methods: Ninety extracted teeth were contaminated and randomly divided into three groups: XPS, PTN, and HCM. Each group was assigned to three subgroups: subgroup A (sterile saline), subgroup B (3% sodium hypochlorite and 17% ethylenediaminetetraacetic acid), and subgroup C (3% sodium hypochlorite, 17% ethylenediaminetetraacetic acid, and PUI). Bacterial sampling was conducted both from baseline samples and samples after chemomechanical preparation. Scanning electron microscopy (SEM) was used to evaluate the residue bacterial biofilms, hard tissue debris, and smear layers on the buccolingual walls of oval-shaped root canals. Results: When combined with sterile saline, XPS demonstrated a higher reduction of bacterial counts and was more effective in eradicating Enterococcus faecalis in the middle third of the canals compared to the other instruments (p < 0.05). Additionally, when used with antimicrobial irrigants, XPS was more effective in disinfecting the coronal third of the canals than the other instruments (p < 0.05). Furthermore, XPS reduced hard tissue debris more effectively in the middle third of canals than in the apical third (p < 0.05). Conclusions: XPS outperforms PTN and HCM in disinfecting oval-shaped root canals. Despite the fact that combining XPS and PUI improves cleaning and disinfecting, removing hard tissue debris from the critical apical area remains challenging.

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Analysis of the Root Canal Apical Third Obturation Quality Depending On the Tooth Root Individual Anatomy

Ermolaeva,

Chibisova,

Mikhailova

et al. 2024

JBSMFS

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Background: Up-to-date methods of root canal obturation applying gutta-percha do not provide an accurate and predictable result. The different anatomy of the root canal apical third requires the selection of an optimal method that avoids voids and high sealer content. This study compared standard and modified lateral compaction techniques in root canals with different morphologies using computed tomography. Objective: To come up with an optimal method for filling the apical third of the root canal, considering its anatomical structure and to evaluate the quality of obturation using the computed tomography method. Materials and methods: The research was performed on 46 root canals of extracted teeth. All teeth were divided into two groups depending in the obturation technique used. The study included a lateral compaction technique with modification in oval-shaped root canals, followed by control using computed tomography. Results: Basing on the study, it has been revealed that even at the stage of computed tomography it is possible to plan the most appropriate method of root canal obturation, depending on their shape. Conclusion: To increase the endodontic treatment efficiency it is necessary to take into account the individual anatomical and morphological structure of the root canals. Root canals that have an oval shape in the apical third may require an obturation technique different from a standard one.

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The prevalence of oval‐shaped root canals: A morphometric study using cone‐beam computed tomography and image analysis software

Cited by 4 publications

References 32 publications

Evolution of the combined effect of different irrigation solutions and activation techniques on the removal of smear layer and dentin microhardness in oval-shaped root canal – An in-vitro study

Evolution of the combined effect of different irrigation solutions and activation techniques on the removal of smear layer and dentin microhardness in oval-shaped root canal – An in-vitro study

Cleaning and Disinfecting Oval-Shaped Root Canals: Ex Vivo Evaluation of Three Rotary Instrumentation Systems with Passive Ultrasonic Irrigation

Analysis of the Root Canal Apical Third Obturation Quality Depending On the Tooth Root Individual Anatomy

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