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目的:运用透明牙标本技术研究蒙古族人离体上颌第一、二磨牙近中颊根(MBR)的根管分型。方法:收集蒙古族人离体上颌第一磨牙55例和第二磨牙61例,制成透明牙标本,观察蒙古族上颌磨牙MBR的根管分型情况。结果:蒙古族上颌第一磨牙MBR的根管分型以2-2型和2-1型为主,在55例中分别占29.09%和25.45%,其次为1-1型占18.18%,而2-1-2型、1-2型、变异型及1-2-1型分别占10.91%、9.09%、5.45%和1.82%;在52例有独立MBR形态的蒙古族上颌第二磨牙中,1-1型和2-1型最多见,分别占32.69%和26.92%,其次为2-2型和2-1-2型,各占13.46%,1-2型及1-2-1型分别占11.54%和1.92%。结论:掌握蒙古族上颌磨牙MBR的2-1-2型和1-2型根管形态,是提高蒙古族上颌磨牙根管治疗成功率的关键。
OBJECTIVE: To study the root canal typing of Mongolian human mesenteric mesiobuccal root (MBR) in the first and second molars using the transparent dental specimen technique. Methods: 55 Mongolian isolated maxillary first molars and 61 second molars were collected to make transparent tooth specimens. The morphological characteristics of the root canal of Mongolian maxillary molar MBR were observed. Results: The root canal types of Mongolian maxillary first molars were type 2-2 and type 2-1, accounting for 29.09% and 25.45% respectively in 55 cases, followed by type 1-1 18.18% 2-1-2 type, 1-2 type, variant type and 1-2-1 type accounted for 10.91%, 9.09%, 5.45% and 1.82% respectively; in 52 Mongolian maxillary second molars with independent MBR morphology , 1-1 and 2-1 were the most common, accounting for 32.69% and 26.92% respectively, followed by 2-2 and 2-1-2, accounting for 13.46%, 1-2 and 1-2-1 respectively Type accounted for 11.54% and 1.92% respectively. Conclusion: To master the 2-1-2 and 1-2 root canal morphology of Mongolian maxillary molar MBR is the key to improve the success rate of root canal therapy in Mongolian maxillary molars.