Gerlach Kerstin, Ludewig Eberhard, Brehm Walter, Gerhards Hartmut, Delling Uta
University of Leipzig, Leipzig, Germany.
Vet Radiol Ultrasound. 2013 Jan-Feb;54(1):48-53. doi: 10.1111/j.1740-8261.2012.01971.x. Epub 2012 Sep 25.
A retrospective analysis of 619 upper and lower cheek teeth from 62 horses was performed. Based on clinical findings, as well as radiographic and magnetic resonance (MR) imaging findings, the teeth were classified into five groups. There were 20 teeth with abnormal MR imaging signals as well as clinical alterations and 599 healthy teeth. Using MR imaging, the appearance of pulp in diseased and disease-free teeth was compared, and the appearance of abnormal pulp was studied. Subsequently, the ability of MR imaging to diagnose pulpitis and pulp necrosis in teeth with normal external appearance was investigated. In horses with clinically verified dental disease, abnormal MR imaging findings were confirmed in the pulp of all affected teeth. An enlarged blurred pulp image with a lower signal intensity was observed only in clinically diseased teeth and was a reliable criterion for diagnosing dental disease on MR imaging. On the other hand, partial or complete absence of pulp in all MR imaging sequences was observed in both diseased and nondiseased teeth. These data demonstrate that pulp changes in equine cheek teeth can be evaluated using MR imaging.
对62匹马的619颗上、下颊齿进行了回顾性分析。根据临床检查结果以及X线和磁共振（MR）成像结果，将这些牙齿分为五组。其中有20颗牙齿存在异常MR成像信号以及临床改变，599颗为健康牙齿。利用MR成像，比较了患病牙齿和无病牙齿牙髓的表现，并对异常牙髓的表现进行了研究。随后，研究了MR成像对外观正常牙齿的牙髓炎和牙髓坏死的诊断能力。在临床确诊患有牙病的马匹中，所有患牙的牙髓均出现了异常MR成像表现。仅在临床患病牙齿中观察到牙髓图像增大且模糊、信号强度降低，这是在MR成像上诊断牙病的可靠标准。另一方面，在患病和未患病牙齿的所有MR成像序列中均观察到部分或完全无牙髓的情况。这些数据表明，马颊齿的牙髓变化可以通过MR成像进行评估。
