RESUMO
Marsupialisation of odontogenic cysts is a minimally invasive treatment method used in human dentistry. Marsupialisation decompresses the cyst and promotes remodeling of alveolar bone and shrinkage of the cyst. In this retrospective study we look at the effectiveness of marsupialisation at reducing the size of odontogenic cysts in dogs. The case series consists of six Boxer dogs with 12 odontogenic cysts. Each case underwent a high resolution CT scan prior to treatment and at follow-up. Each CT scan was reviewed, the volume of each cyst calculated using manual segmentation and the reduction in cyst volume calculated. There was a marked reduction in cystic volume of 66.6% over a mean of 138 days. This shows that the use of marsupialisation effective method of reducing cyst volume.
RESUMO
OBJECTIVES: The aim of this retrospective study was to describe the location and distribution of craniomaxillofacial (CMF) fractures in 45 cats presented to a veterinary referral centre between 2012 and 2017. METHODS: Cats with a history of head trauma, one or more CMF fractures and a pretreatment CT scan of the CMF region were included in this study. For the purpose of the study, the CMF skeleton was divided into 15 functional anatomical regions and the fracture sites were allocated to one of these functional regions. Statistical analysis was performed using R. RESULTS: Skull fractures were evident in 80.0% of cats, and mandibular fractures in 86.7% of cats in this study. The median number of anatomical functional regions affected was eight and there was evidence of moderate or strong correlation between fractures of different regions of the mid-face. Where fractures were recorded in the nasopharynx and orbit they were bilateral in 93.5% and 89.7%, respectively. Twenty-six (57.8%) of the cats had fractures affecting one or both temporomandibular joints, which included fractures of the mandibular fossa, condylar neck and condyle. Twenty-nine cats (64.4%) had tooth fractures and seven cats (15.6%) had significant eye injuries. CONCLUSIONS AND RELEVANCE: Cats presenting with a single symphyseal separation or parasymphyseal fracture are very likely to have further fractures at other locations. Fractures in the nasopharynx, orbit, nose, upper jaw, intermaxillary suture and zygomatic arch regions (the 'mid-face') are likely to occur together. The pattern of distribution of mandibular fractures is not as predictable as that for maxillary fractures. CT imaging is required to achieve a complete diagnosis of the location and distribution of skull fractures in cats after head trauma.
