Prevalence and morphology of middle mesial canals in mandibular first molars and their relationship with anatomical aspects of the mesial root: a CBCT analysis
Abstract Background This study aims to investigate the prevalence and morphology of middle mesial canal (MMC) in mandibular first molar (M1M) among a Northwestern Chinese population, and to analyze their relationship with anatomical aspects of the mesial root. Methods Cone beam computed tomography (...
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2025-01-01
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| author | Dandan Wang Ru Wang Hongyan Xu Qianqian Zhang Yali Guo |
| author_facet | Dandan Wang Ru Wang Hongyan Xu Qianqian Zhang Yali Guo |
| author_sort | Dandan Wang |
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| description | Abstract Background This study aims to investigate the prevalence and morphology of middle mesial canal (MMC) in mandibular first molar (M1M) among a Northwestern Chinese population, and to analyze their relationship with anatomical aspects of the mesial root. Methods Cone beam computed tomography (CBCT) was utilized to evaluate 898 M1Ms and assess the incidence and morphology of MMC. The following parameters for M1M with or without MMC were obtained: the vertical distance between the first appearance of MMC and canal orifices (D), the distance between mesiobuccal (MB) and mesiolingual (ML) canals (D1), the buccolingual width(L1) and mesiodistal width (L2) of mesial roots, and the flatness degree(L1/L2) of mesial roots. The results were statistically analyzed. Results The prevalence of MMC was 9.6% when considering the number of teeth and 7.2% when considering individuals. The presence of MMC was not significantly associated with sex (p = 0.993) or age (p = 0.211). Type 1-3-2 emerged as the most prevalent root canal morphology. MMC primarily manifested within 4 mm below the canal orifices. In cases where MMC was present, the MB-ML distance was significantly greater (p = 0.017). Conversely, no significant correlation was found between the presence of MMC and the length, width, or flatness degree of the mesial roots. Conclusions The morphology of MMCs is complex, and most of them exhibit confluent canals. In instances where MMCs are present, the MB-ML distance is significantly larger. For effective detection of MMC, a thorough examination of the area within 4 mm beneath the canal orifice is recommended. |
| format | Article |
| id | doaj-art-87f072d1000a4fc6ad4b53ae21f46e77 |
| institution | Kabale University |
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| language | English |
| publishDate | 2025-01-01 |
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| series | BMC Oral Health |
| spelling | doaj-art-87f072d1000a4fc6ad4b53ae21f46e772025-02-02T12:45:24ZengBMCBMC Oral Health1472-68312025-01-012511710.1186/s12903-025-05533-1Prevalence and morphology of middle mesial canals in mandibular first molars and their relationship with anatomical aspects of the mesial root: a CBCT analysisDandan Wang0Ru Wang1Hongyan Xu2Qianqian Zhang3Yali Guo4Department of Endodontics, Shaanxi Provincial People’s HospitalDepartment of Endodontics, Shaanxi Provincial People’s HospitalDepartment of Endodontics, Shaanxi Provincial People’s HospitalDepartment of Endodontics, Shaanxi Provincial People’s HospitalDepartment of Endodontics, Shaanxi Provincial People’s HospitalAbstract Background This study aims to investigate the prevalence and morphology of middle mesial canal (MMC) in mandibular first molar (M1M) among a Northwestern Chinese population, and to analyze their relationship with anatomical aspects of the mesial root. Methods Cone beam computed tomography (CBCT) was utilized to evaluate 898 M1Ms and assess the incidence and morphology of MMC. The following parameters for M1M with or without MMC were obtained: the vertical distance between the first appearance of MMC and canal orifices (D), the distance between mesiobuccal (MB) and mesiolingual (ML) canals (D1), the buccolingual width(L1) and mesiodistal width (L2) of mesial roots, and the flatness degree(L1/L2) of mesial roots. The results were statistically analyzed. Results The prevalence of MMC was 9.6% when considering the number of teeth and 7.2% when considering individuals. The presence of MMC was not significantly associated with sex (p = 0.993) or age (p = 0.211). Type 1-3-2 emerged as the most prevalent root canal morphology. MMC primarily manifested within 4 mm below the canal orifices. In cases where MMC was present, the MB-ML distance was significantly greater (p = 0.017). Conversely, no significant correlation was found between the presence of MMC and the length, width, or flatness degree of the mesial roots. Conclusions The morphology of MMCs is complex, and most of them exhibit confluent canals. In instances where MMCs are present, the MB-ML distance is significantly larger. For effective detection of MMC, a thorough examination of the area within 4 mm beneath the canal orifice is recommended.https://doi.org/10.1186/s12903-025-05533-1Middle mesial canalMandibular first molarCone-beam computed tomographyAnatomical variationPrevalence |
| spellingShingle | Dandan Wang Ru Wang Hongyan Xu Qianqian Zhang Yali Guo Prevalence and morphology of middle mesial canals in mandibular first molars and their relationship with anatomical aspects of the mesial root: a CBCT analysis BMC Oral Health Middle mesial canal Mandibular first molar Cone-beam computed tomography Anatomical variation Prevalence |
| title | Prevalence and morphology of middle mesial canals in mandibular first molars and their relationship with anatomical aspects of the mesial root: a CBCT analysis |
| title_full | Prevalence and morphology of middle mesial canals in mandibular first molars and their relationship with anatomical aspects of the mesial root: a CBCT analysis |
| title_fullStr | Prevalence and morphology of middle mesial canals in mandibular first molars and their relationship with anatomical aspects of the mesial root: a CBCT analysis |
| title_full_unstemmed | Prevalence and morphology of middle mesial canals in mandibular first molars and their relationship with anatomical aspects of the mesial root: a CBCT analysis |
| title_short | Prevalence and morphology of middle mesial canals in mandibular first molars and their relationship with anatomical aspects of the mesial root: a CBCT analysis |
| title_sort | prevalence and morphology of middle mesial canals in mandibular first molars and their relationship with anatomical aspects of the mesial root a cbct analysis |
| topic | Middle mesial canal Mandibular first molar Cone-beam computed tomography Anatomical variation Prevalence |
| url | https://doi.org/10.1186/s12903-025-05533-1 |
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