Distal root curvatures in mandibular molars: analysis using digital panoramic X-rays

Fuentes, Ramón; Farfán, Constanza; Astete, Nicolás; Navarro, Pablo; Arias, Alain

doi:10.5603/fm.a2017.0066

Cited by 11 publications

(13 citation statements)

References 22 publications

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“…Moreover, 11 of the radiography-based investigations placed K-files (sizes 08, 10, 15) or silver points with the purpose of facilitating root canal curvature visualisation (Southard et al 1987, Backman et al 1992, Luiten et al 1995, Thompson et al 1995, Hankins & ElDeeb 1996, Harlan et al 1996, Lopes et al 1998, Dobo-Nagy et al 2000, Sch€ afer et al 2002, Iqbal et al 2003, G€ unday et al 2005. Five studies used micro-computed tomography (lCT) (Peters et al 2000, Bergmans et al 2001, Lee et al 2006, Eaton et al 2015, Dannemann et al 2017, two used cone-beam computed tomography (CBCT) (Estrela et al 2008, Choi et al 2015, and another two employed dental panoramic tomography (DPT) (Fuentes et al 2015(Fuentes et al , 2018. Three publications suggested an abstract, mathematically based method and presented diagrammatic representations for curvature and the measurement of other factors in the absence of any experimental component.…”

Section: Resultsmentioning

confidence: 99%

“…Description considered insufficient (n = 12) Method previously described (n = 8) Figure 1 Flow chart of the search strategy. and another two employed dental panoramic tomography (DPT) (Fuentes et al 2015(Fuentes et al , 2018. Three publications suggested an abstract, mathematically based method and presented diagrammatic representations for curvature and the measurement of other factors in the absence of any experimental component.…”

Section: Resultsmentioning

confidence: 99%

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Methods for measurement of root canal curvature: a systematic and critical review

et al. 2018

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Methods for measurement of root canal curvature: a systematic and critical review

et al. 2018

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“…However, the curved region of the root canal is also located at the upper 1/3 and apical 1/3 of this root canal. These regions are curved and narrow, so endodontic instruments easily break in these regions during root canal therapy [ 33 ]. Therefore, clinicians can improve the success rate of root canal therapy by knowing the shape and curvature of the root canal in advance.…”

Section: Discussionmentioning

confidence: 99%

Classification and morphology of middle mesial canals of mandibular first molars in a southern Chinese subpopulation: a cone-beam computed tomographic study

Yang

Zeng

et al. 2020

BMC Oral Health

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Background Cone-beam computed tomography (CBCT) was employed to study the morphology and curvature of middle mesial canals (MMCs) of mandibular first molars (MFMs). Methods CBCT scanning was performed on MFMs of 1100 patients. Patients' images that met the inclusion criteria were divided into group A (< 40 years old) and group B (≥ 40 years old) for further study. The images were used to study the incidence of MMCs at different ages, measure the curvature of MMCs in the mesiodistal and buccolingual directions using the Schneider method, and observe the anatomical morphology of the mesial root canal system. All statistical analyses were performed by using SPSS 21.0 software. Quantitative data were presented as mean ± standard deviation. Student’s t-test was used to calculate the statistical significance. P < 0.05 was considered statistically significant. Results In 875 patients, 1750 MFM images met the inclusion criteria. Among these cases, 158 MFMs contained an MMC, yielding an incidence rate of 9.03%. The incidence rate of MMCs was 11.22% in group A and 6.61% in group B, and this difference was statistically significant (P < 0.05). The curvature in the mesiodistal direction was 29.39 ± 8.53° in group A and 26.06 ± 8.50° in group B, and this difference was also significant (P < 0.05). The curved regions in groups A and B were often located in the middle 1/3 of canal. No significant difference in the distance between MMC orifices and mesiobuccal canal orifices or mesiolingual canal orifices was noted (P > 0.05). The most common mesial root canal morphological type was type II (3-2) (53.80%). Conclusion The incidence of MMCs in MFMs declined as age increased. The canal systems of MMCs were varied and complex, mainly exhibiting an obvious mesiodistal curve. CBCT is an outstanding method to help guide root canal therapy. *Yeqing Yang and Buling Wu have contribute equally to this article.

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“…From the results of Table 7, it can be seen that the curved region of MMC mostly occurs in the middle 1/3 of the canal, so this part should be focused on with the treatment process. However, the curved region of the root canal is also at upper 1/3 and apical 1/3 of this root canal and these regions not only curved but narrow, and are easy to break endodontic instruments during root canal therapy [33].…”

Section: Tablementioning

confidence: 99%

Classification and morphology of middle mesial canals of mandibular first molars in a Southern Chinese subpopulation: a cone-beam computed tomographic study

Yang

Chen

Zeng

et al. 2020

Preprint

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Background：Cone-beam computed tomography (CBCT) was used to study the morphology and curvature of the middle mesial canals (MMCs) of the mandibular first molars (MFMs).Methods：CBCT scanning was performed on the MFMs of 1100 patients. The pa tients' images which met the inclusion criteria were divided into group A (<40 years old) and group B (≥40 years old) for further study. To study the incidence of the MMCs at different ages, to measure the curvature of MMCs of mesiodistal and buccolingual direction by Schneider method, and to observe the anatomical morphology of the mesial root canal system.Results：In 875 patients, 1750 MFM images met the inclusion criteria, among which 158 MFMs contained a MMC, with an incidence rate of 9.03%. The incidence rate of MMCs was 11.22% in group A and 6.61% in group B, with statistically significant differences (P<0.05). The curvature in group A was 29.39±8.53° in mesiodistal direction while group B was 26.06±8.50 °, with statistical differences (P＜0.05). It has been shown that curved regions in group A and B were often found out in the middle 1/3. There is no significant difference in the distance between MMC orifices and mesiobuccal canal orifices or mesiolingual canal orifices (P>0.05). The most common mesial root canal morphology type was type II (3-2) (53.80%). Conclusion：The incidence of MMCs in MFMs was showed to decline along with the increase of age. The canal system of MMCs was varied and complex, mostly with mesiodistal curve obviously. CBCT is an outstanding assistant examination to the root canal therapy.

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Distal root curvatures in mandibular molars: analysis using digital panoramic X-rays

Abstract: (Folia Morphol 2018; 77, 1: 131-137)

Cited by 11 publications

References 22 publications

Methods for measurement of root canal curvature: a systematic and critical review

Methods for measurement of root canal curvature: a systematic and critical review

Classification and morphology of middle mesial canals of mandibular first molars in a southern Chinese subpopulation: a cone-beam computed tomographic study

Classification and morphology of middle mesial canals of mandibular first molars in a Southern Chinese subpopulation: a cone-beam computed tomographic study

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