下颌左侧第一前磨牙三根三根管：一例报告。
Mandibular left first premolar with three roots and three canals: A case report.
作者信息
Lin Cheng-Yi, Yu Yue-Yuan
机构信息
School of Stomatology, Zhejiang Chinese Medical University, Hangzhou 310053, Zhejiang Province, China.
Stomatology Hospital Affiliated with Zhejiang Chinese Medicine University, Hangzhou 310053, Zhejiang Province, China.
出版信息
World J Clin Cases. 2025 May 6;13(13):100822. doi: 10.12998/wjcc.v13.i13.100822.
BACKGROUND
The numbers of mandibular first premolar roots and root canals vary, and the incidence of three roots and three canals is 0.09%.
CASE SUMMARY
In this article, we review the root and root canal conditions for the mandibular first premolar and report the case of a mandibular left first premolar with three roots and three canals in a male patient, with suggestions for clinical diagnosis and treatment. The patient was referred by an orthodontist for the extraction of the tooth. Preoperative cone-beam computed tomography examination revealed that it had three roots. Under local anesthesia, the extraction socket was carefully expanded, and the tooth was successfully removed intact using forceps. The procedure was uneventful, with no root fractures, postoperative bleeding, or sensory abnormality observed.
CONCLUSION
The mandibular first premolar is characterized by multiple roots and canal variations that can increase the difficulty of treatment.
背景
下颌第一前磨牙的牙根和根管数量各不相同，三根三管的发生率为0.09%。
病例摘要
在本文中，我们回顾了下颌第一前磨牙的牙根和根管情况，并报告了一例男性患者下颌左侧第一前磨牙三根三管的病例，并提出临床诊断和治疗建议。该患者由正畸医生转诊来拔除患牙。术前锥形束计算机断层扫描检查显示该牙有三根。在局部麻醉下，小心扩大拔牙窝，用钳子成功完整拔除患牙。手术过程顺利，未观察到牙根折断、术后出血或感觉异常。
结论
下颌第一前磨牙的特点是牙根和根管变异多样，这会增加治疗难度。
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