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1.
The removal of an impacted maxillary canine and associated dentigerous cyst in a Chow: a case report
A case is described involving the surgical removal of an impacted maxillary canine tooth in a Chow and enucleation of an associated dentigerous cyst. 相似文献
2.
A 6-month-old Bassett Hound dog presented for evaluation of recurrent oral bleeding and a right maxillary swelling. Oral examination revealed right maxillary enlargement extending from the level of the right maxillary canine tooth to the area of the second and third premolar teeth. A discolored persistent right maxillary deciduous canine tooth and gingival inflammation was noted. Biopsies taken at the time of extraction of the persistent deciduous canine tooth resulted in significant hemorrhage and a biopsy report of reactive bone. The right maxillary enlargement did not resolve following the extraction procedure and empirical antimicrobial therapy. The owner elected euthanasia and post-mortem evaluation. Histopathologic assessment provided a diagnosis of maxillary hemangioma. 相似文献
3.
F. Heun A. Schwieder F. Hansmann A. Bienert-Zeit M. Hellige 《Equine Veterinary Education》2022,34(5):e181-e186
The dentigerous cyst or temporal teratoma in horses is a well-known congenital malformation that occurs in the temporal region and usually contains dental tissue. This case report describes two horses with a previously unreported variant of the dentigerous cyst associated with an exostosis arising from the temporal bone. The principal clinical sign was a draining tract opening at the margin of the right pinna in both horses. There was no evidence of an ectopic tooth on the radiographs or at ultrasonographic examination. Computed tomography combined with positive contrast sinography of the draining tract revealed bone formation arising from the supramastoid crest of the right temporal bone extending towards a cyst-like structure but without direct connection in both cases. This bone formation was located at a site on the supramastoid crest, close to the external acoustic meatus, where ectopic teeth may also occur. Both cysts were removed surgically with a good long-term outcome. 相似文献
4.
Gracis M 《Journal of veterinary dentistry》1999,16(3):115-128
The radiopaque and radiolucent anatomical structures that are superimposed over the root of the maxillary canine tooth in mesaticephalic cats were identified on digital radiographs made at various angles. The vomer bone, the nasal bone, the palatine fissure, and the infraorbital foramen were not superimposed over the root of the canine tooth in the range of angles examined. Superimposition with the palatine sulcus (which is rarely visible clinically because of silhouetting of the soft tissues) only occurred at extreme horizontal (cross-sectional arc) angles. The second premolar tooth was superimposed at a cross-sectional angle of 80 degrees and 90 degrees. The structures of concern in the interpretation of radiographs of the maxillary canine tooth in mesaticephalic cats are the conchal crest, the line of conjunction between the vertical body of the maxilla and its palatine process, the incisivomaxillary canal (which is rarely visible on radiographic images), and the lachrymal canal. Because of their anatomical vicinity, the radiographic position of these structures relative to the maxillary canine tooth can only be minimally changed. It was not possible to identify an "ideal" angle to radiograph the maxillary canine tooth in these four mesaticephalic cats. However, an acceptable compromise between minimal distortion of the image and satisfactory visualization of the root was obtained with the radiographic beam (rostro-caudal rotation) angled at 80 degrees and the skull (rotation in cross-sectional arc) angled at 70 degrees. 相似文献
5.
Rebecca A. Tudor DVM Oscar Ramirez III DVM Lloyd P. Tate Jr. VMD Mathew P. Gerard BVSc 《Veterinary radiology & ultrasound》1999,40(4):353-356
A 1-month-old male American Paint Horse was evaluated for a hard swelling on the right side of the maxillary region. On radiographs there was a large, expansile outpouching of the right maxillary bone between the second and third premolar teeth. Computed tomography further characterized the expansile lesion to have a soft tissue component and to originate in the region of a caudal maxillary tooth. Surgical reconstruction of the defect was unsuccessful and the animal was euthanetized. Based on failure to find histopathologic evidence of a neoplasm or cyst, the diagnosis was a congenital malformation. 相似文献
6.
Dentigerous cysts appear to be reasonably common near the mandibular incisors of sheep in New Zealand. Their aetiology, true prevalence, and, therefore, their economic significance, are not known at present. They appear as solitary swellings, grow slowly, and are lined by stratified squamous epithelium. Each example usually contains a single, unerupted tooth; however, the anatomical relationship of this tooth to the cyst wall differs from that in dentigerous cysts in humans. Moreover, as some do not contain an unerupted tooth, the term dentigerous is not entirely appropriate but is supported by common usage. Work is in progress to study these lesions further and to clarify their aetiology. There is no practical treatment. 相似文献
7.
Lewis JR Okuda A Shofer FS Pachtinger G Harvey CE Reiter AM 《Journal of veterinary dentistry》2008,25(2):86-95
Abnormal extrusion of canine teeth is often noted in middle-aged and geriatric domestic cats. The same age group of cats also is commonly affected by tooth resorption (TR). This study explored the relationship between these two phenomena of unknown etiology. Using digital radiography, the distance between the alveolar margin (AM) and cementoenamel junction (CEJ), referred to as the AM-CEJ distance, was measured in clinically and radiographically healthy maxillary canine teeth of 24 TR-affected and 29 TR-free cats. The mean AM-CEJ distance of maxillary canine teeth of cats with and cats without TR was 2.68-mm and 2.22-mm, respectively. An analysis of covariance adjusting for age revealed a significant correlation (p = 0.02) between tooth extrusion and TR. Extrusion of the maxillary canine teeth became clinically apparent when an AM-CEJ distance of 2.5-mm or greater was evident in the absence of horizontal or vertical alveolar bone loss. Based on this criterion, 15 of 24 cats with TR (63.0 %) exhibited extrusion of maxillary canine teeth, compared to 9 of 29 cats without TR (31.0 %). Four extruded and five non-extruded maxillary canine teeth were evaluated histologically. Cementum of extruded teeth was significantly thicker compared to that of non-extruded teeth. Four of 4 canine teeth with extrusion (100 %) showed histological evidence of resorption, compared to 1 of 5 canine teeth without extrusion (20.0 %). These results suggest that tooth extrusion is linked to or may be caused by similar factors responsible for the development of TR. 相似文献
8.
de Mira MC Ragle CA Gablehouse KB Tucker RL 《Journal of the American Veterinary Medical Association》2007,231(9):1374-1377
CASE DESCRIPTION: A 3-year-old Thoroughbred mare was evaluated because of abnormal upper respiratory tract sounds (that had become apparent during race training) of 3 to 4 months' duration. CLINICAL FINDINGS: On initial physical evaluation, there were no abnormal findings. During trotting, an abnormal upper airway expiratory sound was audible. Endoscopic examination revealed a small mass protruding into the right ventral nasal meatus. Radiographic images of the skull revealed no abnormal findings. Computed tomography of the head revealed an abnormal structure in the same location as the mass that was observed during endoscopy. The x-ray attenuation of the mass was identical to that of dental tissue. TREATMENT AND OUTCOME: The mass was surgically removed with endoscopic guidance. On gross examination, the excised mass appeared to be a nearly normal molariform tooth. Histologic examination revealed that it was a well-formed tooth, with no other associated cellular populations. The mass was determined to be a molariform supernumerary intranasal tooth. Six months following discharge from the hospital, the trainer reported that the abnormal respiratory tract sound was no longer audible. During a follow-up endoscopic examination performed at the training facility, no abnormalities were detected. CLINICAL RELEVANCE: In horses, an intranasal tooth should be considered as a differential diagnosis for expiratory stridor. Clear definitions of heterotopic polyodontia, dentigerous cyst, and temporal teratoma can be used to clinically diagnose these separate anomalies. In the horse of this report, computed tomographic findings contributed to determination of a diagnosis and formulation of a treatment plan. 相似文献
9.
Pettersson A 《Journal of veterinary dentistry》2010,27(4):222-226
The etiology of tooth resorption in the domestic cat remains unknown. The high prevalence and progressive nature of the disease complicates defining healthy control groups. In order to evaluate the possible influence of various life style changes on the prevalence of tooth resorption, healthy control groups are a prerequisite. This paper presents a prevalence study for tooth resorption in a free-ranging wild felidae population. Skulls from 46 free-ranging Eurasian lynx (Lynx lynx) were examined. The age of the animals had previously been estimated based on cementum annuli in the maxillary right canine tooth. The dental examination included both dental probing and radiographic imaging. Complicated fractures of the canine teeth were found in 9/46 (19.5%) skulls. In one fractured canine, apical root resorption and periapical lucency was detected. The root resorption was attributed to inflammatory resorption as a consequence of the initial dental trauma and necrotic pulp. No signs of tooth resorption were found in the remaining teeth. Supernumerary roots were detected in 18/46 skulls (39.1 %). Supernumerary "peg" teeth caudal to the mandibular first molar tooth were detected in 6/46 (13.0%) skulls. Although further studies on dental ultra-structure are needed, the Swedish Eurasian lynx may, in the future, be useful as a healthy comparative model for studies on the etiopathogenesis of tooth resorption in the domestic cat. 相似文献
10.
A 5‐year‐old, 520 kg Standardbred mare was admitted for an osteosarcoma of the right premaxilla. Two horizontal incisions of the labial mucosa and lingual surface were made 1 cm around the ulceration from the canine tooth to the premaxillary symphysis. The premaxilla and rostral portion of the maxilla were transected 1 cm caudal to the canine tooth with an oscillating saw. The maxillary symphysis was transected using an oscillating saw and a hammer. The wound was closed by primary intention and healed without complication. The cosmetic appearance of the mare was good. The mare was able to prehend hay and grain and grazed without difficulty and the tongue did not protrude. The neoplasm had not recurred 18 months after the surgery. A premaxilla and rostral portion of the adjacent maxilla can be resected to treat horses for a unilateral lesion of the premaxilla but care must be taken to avoid the palatine and incisive arteries which lie within the interincisive canal. 相似文献
11.
C L Runyon D L Rigg R L Grier 《Journal of the American Veterinary Medical Association》1986,188(7):713-717
Allogeneic tooth transplantation was evaluated as a functional and aesthetic treatment for dental fracture in the dog. Of 7 dogs that received tooth transplants, 5 were research animals and 2 were clinical patients. Canine teeth were transplanted immediately after extraction in the research dogs. Endodontic therapy had been performed on the affected canine tooth of one clinical patient. The other clinical patient had bilateral maxillary canine fractures 2 months earlier. One of the research dog transplants failed at 3 weeks as a result of improper surgical technique. Four of the research dogs had a solid implant for 18 months, after which time the dogs were euthanatized serially. All transplanted teeth were anchored firmly into the alveoli, but were nonviable. Root resorption, with bone replacement, was first noticed at 24 months. The transplanted tooth in the first clinical patient remained functional for 3 months, after which time the tooth was fractured. The right canine transplant in the second clinical patient failed by 3 months, probably because of preexisting periapical inflammation. The left transplanted tooth remains stable at 38 months. It was concluded that allogeneic tooth transplantation may have merit as a rapid and inexpensive method for replacement of fractured teeth in the dog. Function is compromised gradually as a result of root resorption and ankylosis, with tooth fracture likely to occur after 2 years. 相似文献
12.
Jennifer Graham Janean Fidel Michael Mison 《Veterinary Clinics of North America: Exotic Animal Practice》2006,9(3):701-706
A 4-year-old, male, neutered ferret presented with squamous cell carcinoma of the right maxillary region associated with the tissues surrounding the upper canine tooth. A rostral maxillectomy was performed to excise the mass. Histopathologic examination showed questionable margins of tumor removal. Approximately 2 months after surgery, the ferret received a course of radiation therapy and is currently being monitored for tumor regrowth. 相似文献
13.
Extract There was a history of discomfort following fracturc of the lower right canine tooth. 相似文献
14.
A two-year-old Boerboel dog presented for a discolored left maxillary canine tooth. Dental radiographs revealed abnormally mineralized pulp within the discolored tooth. Similar radiographic findings were also seen in both maxillary third incisor teeth and in the remaining canine teeth to varying degrees. The discolored tooth was treated by surgical extraction and histopathology revealed abnormal dentin deposition within the canal indicative of dentin dysplasia. Although not previously documented in the dog, the pulpal changes in multiple teeth of the dog reported here were similar to those described for odontoblastic dysplasia in humans. This case report includes a review of developmental abnormalities of dentin in humans and pulpal response to inflammation and injury. 相似文献
15.
Dentigerous cysts have been described in most domestic species and man. Horses commonly present with a swelling over the temporal region and a draining tract along the proximal pinna. Dentigerous cysts are benign structures, but pose a cosmetic problem and are commonly removed by surgical excision at an early age. This case report describes a horse with a dentigerous cyst that contained 2 easily identifiable dental structures, radiographically and grossly resembling a permanent tooth and its deciduous precursor. 相似文献
16.
A ten-year-old miniature Dachshund dog was presented for chronic paroxysmal sneezing and unilateral nasal discharge. Extraction of the maxillary right fourth premolar tooth had been performed 2-weeks prior to the onset of clinical signs. Multiple diagnostic modalities were used to confirm the diagnosis and determine that the etiology was a nasally displaced mesiopalatal tooth root. A limited lateral rhinotomy was performed to remove the root. Postoperative examination 1-month following surgery indicated resolution of the clinical signs and uncomplicated healing of the surgery site. Oral examination indicated normal healing of the surgery site with continued absence of clinical signs 6-months after treatment. 相似文献
17.
This case report describes repair of a gingival cleft located on the labial aspect of the maxillary left canine tooth in a client-owned dog. Multiple procedures were performed including elevation of a pedicle flap, granulation tissue removal, alveoloplasty and root planing, and placement of an osteoconductive bone graft material. The surgical site was closed with a laterally repositioned flap. Postoperative examinations were performed at 2 and 3-weeks without chemical restraint and at 3 and 10-months postoperatively under general anesthesia. At the 10-month postoperative examination, a broad band of gingiva surrounded the maxillary left canine tooth, and probing revealed absence of periodontal pockets. Intraoral dental radiographs indicated maintenance of alveolar bone height and incorporation of the bone graft material into alveolar bone. 相似文献
18.
A 3-month-old English Cocker Spaniel and a 6-month-old miniature poodle presented with clinical signs related to an abnormal right eye since birth. In both dogs, the right globe could not be identified and was replaced by a fluctuant intraorbital mass covered by a vascularized mucous membrane. Ultrasonography demonstrated that both masses were cystic structures markedly larger in size than the normal contralateral globes. In both cases, surgical excision revealed a multilobular cyst filling the whole orbital cavity. Histopathologic examination and immunostaining for glial fibrillary acid protein and S100 protein supported a diagnosis of neural cysts associated with ocular dysplasia. The definitive diagnosis was congenital cystic eye and microphthalmos with cyst for the Cocker Spaniel and miniature poodle, respectively. Karyotype was normal in both dogs. Congenital cystic eye and microphthalmos with cyst result from defects in early embryonic life that arise following formation of the optic vesicle and prior to closure of the optic fissure. To the authors' knowledge neither has been reported in the canine species. They should be considered in the differential diagnosis of orbital cysts in dogs. 相似文献
19.
A 10-month-old, female/intact tiger (Panthra tigris) was presented for a fractured deciduous mandibular right canine tooth, mandibular swelling, and a cutaneous draining tract ventral to the apex of the fractured tooth. The tooth had chronic pulpal exposure and was considered non-vital with periapical osteomyelitis. This case report describes treatment to optimize normal development and eruption of the permanent mandibular right canine tooth. 相似文献
20.
Radiology is the most important diagnostic technique for evaluation of the radicular structure of the tooth and adjacent areas. However, superimposition of other oral or nasal structures often creates difficulties when interpreting radiographic images. The purpose of this study was to identify and locate any anatomical structures that may be superimposed over the root of the maxillary canine tooth in radiographs of dogs. Results showed that the nasal conchae minimally interfere with the visualization of the tooth. The vomer bone and maxillary structures (the conchal crest, the line of conjunction between the maxillary body and the palatine process, and the palatine sulcus) are visible as linear radiopacities, and were found to be responsible for most of the radiographic features in this area. The incisivomaxillary canal and the palatine fissure caused radiolucent images. The incisivomaxillary suture and the nasoincisive suture may appear as radiolucent images in young skulls and linear radiopacities in older skulls. It appears from this study that a compromise between minimal superimposition of dental and non-dental structures and small image distortion is needed to obtain diagnostic radiographic views of the maxillary canine tooth in mesaticephalic dogs. The relative positions of the conchal crest, the line of conjunction between the vertical body of the maxilla and its palatine process, the incisivomaxillary canal, and the tooth, cannot be changed radiographically because of the close anatomic position of these structures. 相似文献