Albers Louisa, Bienert-Zeit Astrid, Staszyk Carsten
Clinic for Horses, University of Veterinary Medicine Hannover, Foundation, 30559 Hannover, Germany.
Faculty of Veterinary Medicine, Institute of Veterinary-Anatomy, -Histology and -Embryology, Justus-Liebig-University Gießen, 35392 Gießen, Germany.
Vet Sci. 2022 Jul 11;9(7):348. doi: 10.3390/vetsci9070348.
Equine Odontoclastic Tooth Resorption and Hypercementosis (EOTRH) and other incisor lesions are often diagnosed only in advanced stages. The incisors of 20 horses were examined radiographically, macroscopically, and via micro-computed tomography (µCT) to discriminate EORTH-affected teeth. Five categories from healthy to severely affected teeth were formed and teeth from each category were examined histologically to evaluate the opportunity of earlier radiographic diagnosis. Histologically, odontoclastic resorptive lesions, leukocytic infiltrations, and areas of irregular cementum and granulation tissue were observed. The extent and severity of histological findings were correlated to the µCT data. Micro-CT imaging was suitable to detect subtle irregularities in the dental substances which were referred to as resorptive lesions. Although histological examinations confirmed the presence of resorptive lesions, not all of them were classified as pathological conditions. Instead, repaired surface lesions were documented which were regarded as a physiological condition. Nevertheless, incisors which were radiographically regarded as healthy can also feature histological signs of EOTRH. Therefore, due to the possibility of misinterpreting radiographic findings combined with superimpositions on intraoral radiographs, the detection of early resorptive lesions remains challenging.
马牙质吸收与牙骨质增生症（EOTRH）及其他切齿病变通常仅在晚期才能确诊。对20匹马的切齿进行了放射成像、宏观检查及显微计算机断层扫描（µCT），以鉴别受EORTH影响的牙齿。从健康到严重病变的牙齿分为五类，并对每类牙齿进行组织学检查，以评估早期放射诊断的可能性。组织学检查发现了破牙细胞性吸收性病变、白细胞浸润以及不规则牙骨质和肉芽组织区域。组织学检查结果的范围和严重程度与µCT数据相关。显微CT成像适合检测牙质中的细微不规则之处，这些被称为吸收性病变。虽然组织学检查证实了吸收性病变的存在，但并非所有病变都被归类为病理状况。相反，记录到了修复后的表面病变，这些被视为生理状况。然而，放射成像上被视为健康的切齿也可能具有EOTRH的组织学特征。因此，由于可能误解放射成像结果以及口腔内X光片上的影像重叠，早期吸收性病变的检测仍然具有挑战性。
