{"title":"牙根形状对下颌磨牙根尖手术切除水平的牙管复杂性的影响:显微 CT 研究","authors":"António Ginjeira , Filipa Neto , Shirin Behdad , Inês Farinha , Nuno Gonçalves , Jorge N.R. Martins , Mariana Pires , Mário Rito Pereira , Isabel Vasconcelos , Isabel Duarte","doi":"10.1016/j.archoralbio.2024.105983","DOIUrl":null,"url":null,"abstract":"<div><h3>Objectives</h3><p>This study aimed to investigate the relationship between the aspect ratios of mandibular molar roots at the apical 3-mm level and their root canal complexity.</p></div><div><h3>Design</h3><p>This study used micro-CT imaging to analyze 163 two-rooted mandibular molars. The aspect ratios of the roots at the apical 3-mm level were categorized as \"< 2.75\" or \"≥ 2.75\" (mesial) and \"< 1.75\" or \"≥ 1.75\" (distal). A two-dimensional (2D) analysis focused on four apical axial cross-section levels to determine the presence of main and accessory canals and isthmus. Additionally, a three-dimensional (3D) assessment of the apical 4-mm of both roots examined main and accessory canals, apical foramina, apical deltas, and middle mesial canals.</p></div><div><h3>Results</h3><p>Mesial roots with aspect ratios ≥ 2.75 showed a higher number of main canals at all levels compared to those with aspect ratios < 2.75 at the 3-mm level. Additionally, the ≥ 2.75 group exhibited more accessory canals and a higher average number of accessory canals. The 3D assessment confirmed significantly more accessory canals and apical foramina in the ≥ 2.75 group. The prevalence of roots with apical deltas was nearly double in the ≥ 2.75 group, and middle mesial canals were exclusively found in this group. In the distal root, the ≥ 1.75 group showed a significantly higher number of main canals at all axial levels. No significant differences were observed between groups in terms of accessory canals, apical foramina, or deltas.</p></div><div><h3>Conclusions</h3><p>A higher root aspect ratio is related to higher anatomical complexity.</p></div>","PeriodicalId":8288,"journal":{"name":"Archives of oral biology","volume":"164 ","pages":"Article 105983"},"PeriodicalIF":2.2000,"publicationDate":"2024-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0003996924001043/pdfft?md5=bf3239111df9ffdde1b1f65e61769a56&pid=1-s2.0-S0003996924001043-main.pdf","citationCount":"0","resultStr":"{\"title\":\"Influence of root shape on canal complexity at the mandibular molar apical surgical resection level: A micro-CT study\",\"authors\":\"António Ginjeira , Filipa Neto , Shirin Behdad , Inês Farinha , Nuno Gonçalves , Jorge N.R. Martins , Mariana Pires , Mário Rito Pereira , Isabel Vasconcelos , Isabel Duarte\",\"doi\":\"10.1016/j.archoralbio.2024.105983\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><h3>Objectives</h3><p>This study aimed to investigate the relationship between the aspect ratios of mandibular molar roots at the apical 3-mm level and their root canal complexity.</p></div><div><h3>Design</h3><p>This study used micro-CT imaging to analyze 163 two-rooted mandibular molars. The aspect ratios of the roots at the apical 3-mm level were categorized as \\\"< 2.75\\\" or \\\"≥ 2.75\\\" (mesial) and \\\"< 1.75\\\" or \\\"≥ 1.75\\\" (distal). A two-dimensional (2D) analysis focused on four apical axial cross-section levels to determine the presence of main and accessory canals and isthmus. Additionally, a three-dimensional (3D) assessment of the apical 4-mm of both roots examined main and accessory canals, apical foramina, apical deltas, and middle mesial canals.</p></div><div><h3>Results</h3><p>Mesial roots with aspect ratios ≥ 2.75 showed a higher number of main canals at all levels compared to those with aspect ratios < 2.75 at the 3-mm level. Additionally, the ≥ 2.75 group exhibited more accessory canals and a higher average number of accessory canals. The 3D assessment confirmed significantly more accessory canals and apical foramina in the ≥ 2.75 group. The prevalence of roots with apical deltas was nearly double in the ≥ 2.75 group, and middle mesial canals were exclusively found in this group. In the distal root, the ≥ 1.75 group showed a significantly higher number of main canals at all axial levels. No significant differences were observed between groups in terms of accessory canals, apical foramina, or deltas.</p></div><div><h3>Conclusions</h3><p>A higher root aspect ratio is related to higher anatomical complexity.</p></div>\",\"PeriodicalId\":8288,\"journal\":{\"name\":\"Archives of oral biology\",\"volume\":\"164 \",\"pages\":\"Article 105983\"},\"PeriodicalIF\":2.2000,\"publicationDate\":\"2024-04-27\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.sciencedirect.com/science/article/pii/S0003996924001043/pdfft?md5=bf3239111df9ffdde1b1f65e61769a56&pid=1-s2.0-S0003996924001043-main.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Archives of oral biology\",\"FirstCategoryId\":\"3\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0003996924001043\",\"RegionNum\":4,\"RegionCategory\":\"医学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"DENTISTRY, ORAL SURGERY & MEDICINE\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Archives of oral biology","FirstCategoryId":"3","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0003996924001043","RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"DENTISTRY, ORAL SURGERY & MEDICINE","Score":null,"Total":0}
Influence of root shape on canal complexity at the mandibular molar apical surgical resection level: A micro-CT study
Objectives
This study aimed to investigate the relationship between the aspect ratios of mandibular molar roots at the apical 3-mm level and their root canal complexity.
Design
This study used micro-CT imaging to analyze 163 two-rooted mandibular molars. The aspect ratios of the roots at the apical 3-mm level were categorized as "< 2.75" or "≥ 2.75" (mesial) and "< 1.75" or "≥ 1.75" (distal). A two-dimensional (2D) analysis focused on four apical axial cross-section levels to determine the presence of main and accessory canals and isthmus. Additionally, a three-dimensional (3D) assessment of the apical 4-mm of both roots examined main and accessory canals, apical foramina, apical deltas, and middle mesial canals.
Results
Mesial roots with aspect ratios ≥ 2.75 showed a higher number of main canals at all levels compared to those with aspect ratios < 2.75 at the 3-mm level. Additionally, the ≥ 2.75 group exhibited more accessory canals and a higher average number of accessory canals. The 3D assessment confirmed significantly more accessory canals and apical foramina in the ≥ 2.75 group. The prevalence of roots with apical deltas was nearly double in the ≥ 2.75 group, and middle mesial canals were exclusively found in this group. In the distal root, the ≥ 1.75 group showed a significantly higher number of main canals at all axial levels. No significant differences were observed between groups in terms of accessory canals, apical foramina, or deltas.
Conclusions
A higher root aspect ratio is related to higher anatomical complexity.
期刊介绍:
Archives of Oral Biology is an international journal which aims to publish papers of the highest scientific quality in the oral and craniofacial sciences. The journal is particularly interested in research which advances knowledge in the mechanisms of craniofacial development and disease, including:
Cell and molecular biology
Molecular genetics
Immunology
Pathogenesis
Cellular microbiology
Embryology
Syndromology
Forensic dentistry