3D Micro-CT Analysis of Void and Gap Formation in Curved Root Canals

Şımşek, Neslihan; Keleş, Ali; Ahmetoğlu, Fuat; Akinci, Levent; Er, Kürşat

doi:10.5152/eej.2017.17004

Cited by 5 publications

(5 citation statements)

References 26 publications

(50 reference statements)

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“…The quantitative measurement of voids differed among the techniques. The results of one of the studies differed from the rest-it found fewer voids in the cold lateral condensation group [75]. These differences were not significant.…”

Section: Discussionmentioning

confidence: 70%

“…The presence of voids at the interface may promote bacterial proliferation from untouched root areas and lead to failure of treatment. Another study compared the self-adjusting file system to rotary techniques [75] and found fewer voids with rotary instruments in both obturation techniques (though statistically insignificant). It is known that the technique of instrumentation affects the completeness of obturation [36].…”

Section: Discussionmentioning

confidence: 98%

“…Mathematical filters such as a Gaussian filter in software can also be used to smoothen micro-CT images. Many studies in this review included a software that provides such mathematical filters [75,76,78,81,82]. One study used an external filter to control beam hardening artefacts [79].…”

Section: Discussionmentioning

confidence: 99%

“…A total of nine studies were included for qualitative analysis [75][76][77][78][79][80][81][82][83]. These compared voids seen in obturation with thermoplastic techniques versus cold lateral condensation.…”

Section: Studies Examining the Completeness Of Obturationmentioning

confidence: 99%

“…However, two of these found significant differences only in the apical third [76,78]. Two studies found a greater number of voids with the thermoplastic technique but these differences were not significant [75,83]. A summary of the data extracted from the studies is given in Table 2.…”

Section: Studies Examining the Completeness Of Obturationmentioning

confidence: 99%

See 4 more Smart Citations

Complete Obturation—Cold Lateral Condensation vs. Thermoplastic Techniques: A Systematic Review of Micro-CT Studies

et al. 2021

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To prevent re-infection and provide a hermetic seal of the root canal system, an endodontist must aim to produce a void-free obturation. This review aimed to compare the completeness of root canal obturation between the two most prevalent methods—cold lateral condensation and warm gutta-percha techniques—using micro-CT (PROSPERO reg no. 249815). Materials and Methods: A search of Scopus, Embase, PubMed (Medline via PubMed), and Web of Science databases was done without any time restriction according to the PRISMA protocol. Articles that compared both techniques and were published in English were included. Data was extracted and the risk of bias was assessed using an adapted tool based on previous studies. Results: A total of 141 studies were identified by the search. Following the screening and selection of articles, 9 studies were included for review. Data was extracted manually and tabulated. Most studies had a moderate risk of bias. None determined operator skill in both methods before comparison. The data extracted from the included studies suggests that both techniques produce voids in the obturation. The thermoplasticized gutta-percha techniques may result in fewer voids compared to cold lateral condensation. Conclusion: Considering the limitations of the included studies, it was concluded that neither technique could completely obturate the root canal. Thermoplasticized gutta-percha techniques showed better outcomes despite a possible learning bias in favor of cold lateral condensation. Establishing operator skills before comparison may help reduce this bias.

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Section: Discussionmentioning

confidence: 70%

Section: Discussionmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 99%

Section: Studies Examining the Completeness Of Obturationmentioning

confidence: 99%

Section: Studies Examining the Completeness Of Obturationmentioning

confidence: 99%

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Complete Obturation—Cold Lateral Condensation vs. Thermoplastic Techniques: A Systematic Review of Micro-CT Studies

et al. 2021

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Filling quality of several obturation techniques in the presence of apically separated instruments: A Micro‐CT study

Türker

Uzunoğlu-Özyürek

Kaşıkçı

et al. 2020

Microscopy Res & Technique

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Separated root canal instruments may affect the quality of root canal obturation and hence the survival of endodontically treated teeth. Obturation techniques may influence filling-quality. The aim was to evaluate the obturation quality of teeth filled with different obturation techniques in the presence of apically separated instruments using micro-computed tomography (μ-CT). Notched ProTaper F2 rotary-files were separated in the apical third of 36-human mandibular incisors with single root/canal and mature apex. Samples were filled by an endodontist according to one of the following obturation techniques (n = 12): cold lateral-compaction (CLC), single-cone (SC) and thermoplastic injection (TI). Samples were scanned by the Skyscan 1,274® μ-CT device after 1-week at 37 C in 100% humidity. Images of the sections were evaluated with CTan software in terms of total-volume and volume percentage of the filling materials and voids between coronal end of the separated instrument and gutta-percha/sealer filled void-free sections. Data was analyzed using Kruskal-Wallis and Mann Whitney-U tests with a significance level of 5%. Kruskal-Wallis revealed differences among groups (p < 0.05).Pairwise comparisons revealed that less volume of voids were measured in SC (0.02 ± 0.03 mm 3 ) compared to CLC (0.15 ± 0.16 mm 3 ) and TI (0.18 ± 0.24 mm 3 ) (p < 0.05); while TI was statistically similar with CLC (p > 0.05). Percentages of volumes of voids and filling materials were as follows for

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Comparison of obturation quality in natural and replica teeth root-filled using different sealers and techniques

2023

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Objectives This study aims to assess the obturation efficacy of sealers placed with different techniques using microcomputed tomography (µCT) and assess the influence of µCT testing parameters on the obturation data obtained. Materials and methods Incisors and mesial roots of lower molars with standardized root length were scanned using µCT, and one tooth of each type was 3D printed in acrylic. Two obturation techniques (warm vertical and single cone) and 4 sealer types (AH Plus, BioRoot RCS, Totalfill BC, and Bio-C Sealers) were assessed following storage in Hank’s balanced salt solution for 3 and 6 months by assessing gap and void volume percentages on both natural and replica incisor and molar roots. The storage solution was analysed to assess calcium ion leaching. The influence of temperature, tooth positioning, and moisture content of the teeth while µCT scanning was also investigated. Results The obturation quality in the incisor group was the same using both natural teeth and replicas (p > 0.05). No changes in void volume were identified when comparing the same sealer using different obturation techniques. The premixed sealers used in single-cone obturation exhibited high void volume in the 3D printed replicas in the long term. The temperature, positioning, and moisture content of the teeth did not affect the outcome of µCT testing. Conclusions BioRoot RCS, Totalfill BC, and Bio-C Sealers are suitable for obturation of both complex and simple root canal systems using different obturation techniques with BioRoot RCS exhibiting the highest calcium ion release. 3D printed acrylic teeth can be used to assess the obturation quality in uncomplicated root canal systems. µCT parameters had no significant effect on the µCT measurement. Clinical relevance The single-cone obturation technique with hydraulic sealer is a simple technique that can be used for obturation of all root canal systems.

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3D Micro-CT Analysis of Void and Gap Formation in Curved Root Canals

Cited by 5 publications

References 26 publications

Complete Obturation—Cold Lateral Condensation vs. Thermoplastic Techniques: A Systematic Review of Micro-CT Studies

Complete Obturation—Cold Lateral Condensation vs. Thermoplastic Techniques: A Systematic Review of Micro-CT Studies

Filling quality of several obturation techniques in the presence of apically separated instruments: A Micro‐CT study

Comparison of obturation quality in natural and replica teeth root-filled using different sealers and techniques

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