一例犬上颌犬齿侧向脱位复合固定术的病例报告

A Case Report on Composite Fixation for Lateral Luxation of a Maxillary Canine Tooth in a Dog

摘要: 本文报告一例犬上颌犬齿外伤性侧向脱位病例的诊治过程。患者为一只7岁6个月龄、8.6 kg的中华田园犬“豆子”，因与其他犬只打斗造成左上颌犬齿(204)外伤性脱位并伴牙槽骨裂。经影像学及口腔检查确认为牙齿结构完整的侧向脱位。在呼吸麻醉与浸润麻醉下进行手术复位，并采用“8”字形环扎钢丝与树脂夹板进行固定。树脂材料使用3M冠桥树脂，并在复位前于根面涂布米诺环素软膏以促进口腔组织愈合。术后给予头孢泊肟脂与非罗考昔口服5天。术后12周拆除固定装置，牙齿位置稳定、颜色正常，仅树脂接触区出现轻度牙龈炎。本病例显示，环扎钢丝联合树脂夹板是一种有效且微创的犬牙外伤固定方法，能良好维持牙齿稳定性并保留牙髓活力。

Abstract: This article reports the diagnosis and treatment process of a case of traumatic lateral luxation of the maxillary canine tooth in a dog. The patient was a 7-year-6-month-old, 8.65 kg Chinese mongrel dog named “Douzi”, who suffered traumatic luxation of the right maxillary canine tooth (204) accompanied by an alveolar bone fracture due to a fight with another dog. Imaging and oral examination confirmed lateral luxation with an intact tooth structure. Reduction was performed under general anesthesia and local anesthesia, followed by fixation using a figure-of-eight circumdental wire and a composite resin splint. The resin material used was 3M crown and bridge resin, and minocycline ointment was applied to the root surface before reduction to promote the healing of oral tissues. Postoperatively, cefpodoxime and firocoxib were administered orally for 5 days. The fixation device was removed 12 weeks postoperatively, at which time the tooth position was stable, the color was normal, and only mild gingivitis was observed at the resin contact area. This case demonstrates that a circumdental wire combined with a composite resin splint is an effective and minimally invasive fixation method for traumatic dental injuries in dogs, capable of maintaining good tooth stability and preserving pulp vitality.