Non-Cochrane · prognostic · PM41585132
Prevalence of second mesiobuccal canal in maxillary first and second molar detected using cone-beam computed tomography in the Han population: A systemic review and meta-analysis.
Wu Jaan-Yih, Chiang Ho-Sheng, Chen Yi-Jie, et al. · Journal of dental sciences · 2026 · PubMed · doi:10.1016/j.jds.2025.09.008
Findings
6 findings
| Population | ||||
|---|---|---|---|---|
| Han population (mainland China, Taiwan, Hong Kong) with permanent maxillary first molars (PMFMs) | CBCT assessment | None | Prevalence of second mesiobuccal canal (MB2) In vivo CBCT imaging | Prevalence (event rate) 0.637 [0.554, 0.713] GRADE not reported 12 studies · 26222 participants |
| Han population (mainland China, Taiwan, Hong Kong) with permanent maxillary second molars (PMSMs) | CBCT assessment | None | Prevalence of second mesiobuccal canal (MB2) In vivo CBCT imaging | Prevalence (event rate) 0.233 [0.188, 0.286] GRADE not reported 10 studies · 9707 participants |
| Han population (mainland China, Taiwan, Hong Kong) with permanent maxillary first molars (PMFMs) | Male sex | Female sex | MB2 presence (odds) In vivo CBCT imaging | OR 1.532 [1.313, 1.786] GRADE not reported 8 studies · 23238 participants |
| Han population (mainland China, Taiwan, Hong Kong) with permanent maxillary second molars (PMSMs) | Male sex | Female sex | MB2 presence (odds) In vivo CBCT imaging | OR 1.79 [1.572, 2.038] GRADE not reported 5 studies · 4636 participants |
| Han population (mainland China, Taiwan, Hong Kong) with permanent maxillary first molars (PMFMs) | Right side | Left side | MB2 presence (odds) In vivo CBCT imaging | OR 0.964 [0.802, 1.159] GRADE not reported 8 studies · 24105 participants |
| Han population (mainland China, Taiwan, Hong Kong) with permanent maxillary second molars (PMSMs) | Right side | Left side | MB2 presence (odds) In vivo CBCT imaging | OR 0.982 [0.733, 1.317] GRADE not reported 5 studies · 5622 participants |
Included primary studies 25
Open in Studies| Study | Year | Also included by | Outcomes it informs here | Trial data |
|---|---|---|---|---|
| Zhang 2023 matched by author and year (probable) | NR | 5 other reviews | not stated | not extracted yet |
| Wang 2017 matched by author and year (probable) | NR | 2 other reviews | not stated | not extracted yet |
| Martins 2018 Worldwide Analyses of Maxillary First Molar Second Mesiobuccal Prevalence: A Multicenter Cone-beam Computed Tomographic Study DOI:10.1016/j.joen.2018.07.027 | 2018 | 1 other review | not stated | not extracted yet |
| Lin 2017 Evaluation of the root and canal systems of maxillary molars in Taiwanese patients: A cone beam computed tomography study DOI:10.1016/j.bj.2017.05.003 | 2017 | this review only | not stated | not extracted yet |
| Lin et al. 2017 Evaluation of the root and canal systems of maxillary molars in Taiwanese patients: A cone beam computed tomography study. PMID:28918912 | 2017 | this review only | not stated | not extracted yet |
| Liu 2023 Concurrency of additional canals in mandibular incisors and second mesiobuccal canal in maxillary first molars: A cone‐beam computed… DOI:10.1111/aej.12787 | 2023 | this review only | not stated | not extracted yet |
| Liu et al. 2023 Concurrency of additional canals in mandibular incisors and second mesiobuccal canal in maxillary first molars: A cone-beam computed… PMID:37548258 | 2023 | this review only | not stated | not extracted yet |
| Martins et al. 2018 Worldwide Analyses of Maxillary First Molar Second Mesiobuccal Prevalence: A Multicenter Cone-beam Computed Tomographic Study. PMID:30243661 | 2018 | this review only | not stated | not extracted yet |
| Ren 2021 Maxillary molar root and canal morphology of Neolithic and modern Chinese DOI:10.1016/j.archoralbio.2021.105272 | 2021 | this review only | not stated | not extracted yet |
| Ren et al. 2021 Maxillary molar root and canal morphology of Neolithic and modern Chinese. PMID:34600333 | 2021 | this review only | not stated | not extracted yet |
| Su 2019 Detection and location of second mesiobuccal canal in permanent maxillary teeth: A cone-beam computed tomography analysis in a Taiwanese… DOI:10.1016/j.archoralbio.2018.11.006 | 2019 | this review only | not stated | not extracted yet |
| Su et al. 2019 Detection and location of second mesiobuccal canal in permanent maxillary teeth: A cone-beam computed tomography analysis in a Taiwanese… PMID:30471531 | 2019 | this review only | not stated | not extracted yet |
| Tian 2016 Analysis of the Root and Canal Morphologies in Maxillary First and Second Molars in a Chinese Population Using Cone-beam Computed Tomography DOI:10.1016/j.joen.2016.01.017 | 2016 | this review only | not stated | not extracted yet |
| Tian et al. 2016 Analysis of the Root and Canal Morphologies in Maxillary First and Second Molars in a Chinese Population Using Cone-beam Computed… PMID:26994598 | 2016 | this review only | not stated | not extracted yet |
| Tzeng 2020 Analysis of root canal system of maxillary first and second molars and their correlations by cone beam computed tomography DOI:10.1016/j.jfma.2019.09.012 | 2020 | this review only | not stated | not extracted yet |
| Tzeng et al. 2020 Analysis of root canal system of maxillary first and second molars and their correlations by cone beam computed tomography. PMID:31594668 | 2020 | this review only | not stated | not extracted yet |
| Wu 2017 Root and canal morphology of maxillary second molars by cone-beam computed tomography in a native Chinese population DOI:10.1177/0300060517699987 | 2017 | this review only | not stated | not extracted yet |
| Wu et al. 2017 Root and canal morphology of maxillary second molars by cone-beam computed tomography in a native Chinese population. PMID:28351286 | 2017 | this review only | not stated | not extracted yet |
| Xia 2020 Root Anatomy and Root Canal Morphology of Maxillary Second Permanent Molars in a Chongqing Population: A Cone-Beam Computed Tomography Study DOI:10.12659/msm.922794 | 2020 | this review only | not stated | not extracted yet |
| Zhang 2010 (Zheng et al.) A Cone-Beam Computed Tomography Study of Maxillary First Permanent Molar Root and Canal Morphology in a Chinese Population DOI:10.1016/j.joen.2010.06.018 | 2010 | this review only | not stated | not extracted yet |
| Zhang 2011 Use of CBCT to identify the morphology of maxillary permanent molar teeth in a Chinese subpopulation DOI:10.1111/j.1365-2591.2010.01826.x | 2010 | this review only | not stated | not extracted yet |
| Zhang 2017 Assessment of the Second Mesiobuccal Root Canal in Maxillary First Molars: A Cone-beam Computed Tomographic Study DOI:10.1016/j.joen.2017.06.021 | 2017 | this review only | not stated | not extracted yet |
| Zhang et al. 2010 A cone-beam computed tomography study of maxillary first permanent molar root and canal morphology in a Chinese population. PMID:20728713 | 2010 | this review only | not stated | not extracted yet |
| Zhang et al. 2011 Use of CBCT to identify the morphology of maxillary permanent molar teeth in a Chinese subpopulation. PMID:21091495 | 2011 | this review only | not stated | not extracted yet |
| Zhang et al. 2017 Assessment of the Second Mesiobuccal Root Canal in Maxillary First Molars: A Cone-beam Computed Tomographic Study. PMID:29032819 | 2017 | this review only | not stated | not extracted yet |
Overlap with other reviews
Reviews that include the same primary studies are not independent evidence. Shared counts match studies by PMID, DOI or NCT, and otherwise by author and year (a probable match). Only the non-Cochrane dental reviews have study lists, so overlap with Cochrane reviews is not counted yet.
Review question
| Element | Planned (methods) | Found (results) |
|---|---|---|
| Population | Han individuals (Taiwan, Hong Kong, mainland China or other regions) with permanent maxillary first and/or second molars | Han individuals (n=15639 participants; 35929 teeth: 26222 maxillary first molars, 9707 maxillary second molars), ages 10 to 89 |
| Intervention | CBCT detection (in vivo) | CBCT detection of MB2 (n=14) |
| Comparison | Not specified | Not specified |
| Outcomes | Prevalence of MB2 canal (event rate); secondary: sex and side distribution (OR) | MB2 prevalence PMFM 63.7% (12 studies), PMSM 23.3% (10 studies); sex OR PMFM 1.532 (8 studies), PMSM 1.790 (5 studies); side OR PMFM 0.964 (8), PMSM 0.982 (5) |
| Study designs | In vivo CBCT studies in English or Chinese | Cross-sectional CBCT studies (3 Taiwan, 11 China) |
| Timing | Not specified | Not specified |