双侧上颌**前磨牙3根3根管1例

2020-06-29 蒋文凯 程庚 刘晓燕 实用口腔医学杂志

患者,男,检查:24残冠,继发龋,部分牙龈覆盖冠面,冷(+),探(+),叩(-),不松动;颊侧牙槽黏膜处未见窦道。CBCT检查:24为3根牙,颊侧2根,腭侧1根(图1)。诊断:24慢性牙髓炎。治疗计划

1.病例资料

患者,男,检查:24残冠,继发龋,部分牙龈覆盖冠面,冷(+),探(+),叩(-),不松动;颊侧牙槽黏膜处未见窦道。CBCT检查:24为3根牙,颊侧2根,腭侧1根(图1)。诊断:24慢性牙髓炎。治疗计划:24去髓术,桩核冠修复(患者知情同意)。


2.治疗方法及结果

4%盐酸阿替卡因局部浸润麻醉,涡轮机去龋后,电刀修整牙龈,制作树脂假壁,橡皮障隔湿,开髓揭髓顶,探查根管口,根管系统为2个颊根,1个腭根。10号K锉探查根管,根尖定位仪测得近中颊根长16mm,远中颊根长15mm,腭根长20mm,M2机用镍钛锉预备至F2,根管预备过程中反复使用3%次氯酸钠溶液冲洗,使用超声治疗仪荡洗根管。无菌纸捻干燥根管后封入氢氧化钙糊剂。1周后复诊,AHplus和大锥度牙胶试尖,热熔牙胶垂直加压法进行根管充填,术后X线片显示:3根管根充均为恰填。1周后复诊,腭根和近颊根管预备钉道,进行纤维桩树脂核修复(图2),转修复科行全冠修复。


3.讨论

研究报道显示上颌第一前磨牙根管系统差异较大,56.6%为双根管,41.7%为单根管,而三根管是最常见的根管变异,其发生率仅为1.7%。据研究报道,大部分上颌第一前磨牙三根管表现为1个腭根和2个颊根(近颊根和远颊根),类似于上颌第一磨牙的根管解剖形态。

随着CBCT广泛应用于临床,临床医生可以从冠状、矢状,断层位等不同位置全面了解根管解剖结构,极大减低了临床根管遗漏率。借助于CBCT,对本病例的左、右双侧侧上、下颌四颗第一前磨牙进行了根管解剖形态分析,发现该患者的四个前磨牙都为三根管型(图1)。

原始出处:

蒋文凯,程庚,刘晓燕,郭翠红,孙书恺.双侧上颌第一前磨牙3根3根管1例[J].实用口腔医学杂志,2019,35(04):567.

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