Hisey Erin A, Rodriguez Paula, Tarbert Danielle K, Paul-Murphy Joanne R, Hendrickson Carli, Brust Kelsey, Maggs David J, Leonard Brian C
Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California-Davis, Davis, California, USA.
William R. Pritchard Veterinary Medical Teaching Hospital, School of Veterinary Medicine, University of California-Davis, Davis, California, USA.
Vet Ophthalmol. 2024 Sep 27. doi: 10.1111/vop.13281.
To determine the impact of chronic dental disease on the nasolacrimal duct of chinchillas using contrast CT dacryocystorhinography.
Two 12-year-old female chinchillas with uni- or bilateral ocular discharge and a history of chronic, moderate (Chinchilla 1, one-year) or severe (Chinchilla 2, three-years) dental disease.
Contrast CT dacryocystorhinography was performed to identify abnormalities in the nasolacrimal duct and dentition, and to correlate those changes.
Chinchilla 1 had a focal soft tissue attenuating expansion of the maxillary bone rostral to the first left premolar interpreted as possible abscessation causing deviation of the nasolacrimal duct over its dorsomedial margin. The right nasolacrimal duct appeared normal. Chinchilla 2 had periapical abscessation of a retained subgingival left maxillary incisor fragment which extended into the nasal cavity causing focal narrowing and distal dilation of the left nasolacrimal duct. Complete contrast infusion of the right nasolacrimal duct could not be completed on Chinchilla 2. A focal area of superficial corneal fibrosis ipsilateral to the obstructed nasolacrimal duct was also identified in Chinchilla 2. Treatment consisted of occlusal adjustments to correct the coronal elongation, systemic antibiotics (metronidazole and either marbofloxacin or azithromycin), and topical tear replacement therapy and diclofenac as needed. Ocular discharge decreased in both chinchillas but did not resolve long-term in either animal.
Chronic dental disease including periapical abscessation in chinchillas can obstruct the nasolacrimal duct, leading to impaired tear drainage. Management of dental disease is crucial to maintain patency of the nasolacrimal duct.
使用对比CT泪囊鼻腔造影术确定慢性牙病对龙猫鼻泪管的影响。
两只12岁雌性龙猫，有单侧或双侧眼部分泌物，并有慢性中度（龙猫1，一年）或重度（龙猫2，三年）牙病病史。
进行对比CT泪囊鼻腔造影术，以识别鼻泪管和牙列的异常，并关联这些变化。
龙猫1上颌骨在左侧第一前磨牙前方有局灶性软组织衰减性扩张，被解释为可能的脓肿形成，导致鼻泪管在其背内侧边缘处偏移。右侧鼻泪管看起来正常。龙猫2保留的龈下左上颌切牙碎片根尖周脓肿延伸至鼻腔，导致左侧鼻泪管局灶性狭窄和远端扩张。在龙猫2上无法完成右侧鼻泪管的完全造影剂注入。在龙猫2中还发现了与阻塞的鼻泪管同侧的角膜浅层纤维化局灶区域。治疗包括进行咬合调整以纠正牙冠伸长、全身使用抗生素（甲硝唑和马波沙星或阿奇霉素），以及根据需要进行局部泪液替代治疗和使用双氯芬酸。两只龙猫的眼部分泌物均减少，但两只动物的眼部分泌物均未长期消除。
龙猫的慢性牙病包括根尖周脓肿可阻塞鼻泪管，导致泪液引流受损。牙病的管理对于维持鼻泪管通畅至关重要。
