A rare case of radicular dens invaginatus (dens in dente) was found during dental cleaning of a 5-year-old male Rottweiler dog. Radiographic examination revealed intense radiopacity, which extended from the crown to the apical root region of the affected tooth. Macroscopically, the crown of the left maxillary first molar tooth (209) had irregular and deformed buccal and lingual surfaces. Microscopic examination revealed dentine invagination in the pulp cavity in of the crown and root and pulp necrosis. Based on the gross, radiographic and histological findings, a diagnosis of radicular dens invaginatus was made.

中文翻译：

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罕见的犬根状窝畸形（Dent）。

在对5岁的罗威纳犬（Rottweiler）的狗进行牙齿清洁时，发现了一例罕见的放射状牙本质窝（dens in dente）。放射线检查显示强烈的射线不透性，从冠部延伸到患牙的根尖区域。宏观上，左上颌第一磨牙（209）的冠具有不规则且变形的颊和舌表面。显微镜检查显示牙本质在牙髓腔内的牙冠内陷和牙根坏死。根据总体，影像学和组织学检查结果，诊断为放射状牙窝。