Chirurgische Entfernung einer ektopischen Zahnanlage bei einer Isländerstute

Dicht, Sidonia; Chicca, Francesca Del; Fürst, A

doi:10.1024/0036-7281/a000275

Cited by 5 publications

(7 citation statements)

References 2 publications

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“…In some cases, radiographs were sufficient for diagnosis (Easley et al., 2010), especially when oblique projections are used (Ebling et al., 2009) or contrast medium was injected into the draining tract (Gaughan, 2010). Other authors recommend a CT examination as the diagnostic modality of choice (Barakzai & Dixon, 2012; Bartmann & Bienert‐Zeit, 2012; Smith et al., 2012) because smaller dental structures may be missed on radiographs (Dicht et al., 2011). In the two cases presented here, CT in combination with positive contrast sinography was the superior imaging modality to identify the dentigerous cyst with exostosis and for surgical planning.…”

Section: Discussionmentioning

confidence: 99%

Dentigerous cysts with exostosis of the temporal bone in horses – A new variant diagnosed by computed tomography

Heun

Schwieder

Hansmann

et al. 2021

Equine Veterinary Education

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SummaryThe 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.

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Section: Discussionmentioning

confidence: 99%

Dentigerous cysts with exostosis of the temporal bone in horses – A new variant diagnosed by computed tomography

Heun

Schwieder

Hansmann

et al. 2021

Equine Veterinary Education

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“…This is usually observed in atypical polyodontias, especially around the ear region. Often, the dentigerous cyst is characterised by the formation of draining tracts [ 6 ].…”

Section: Discussionmentioning

confidence: 99%

“…In the described case, the cyst did not involve any vascular or nervous structures. During these surgical interventions, especially hemorrhage or iatrogenic damage to nerves and vessels may negatively impact prognosis [ 6 ]. In the current case, no complications occurred.…”

Section: Discussionmentioning

confidence: 99%

Maxillary Dentigerous Cyst with Double Wolf Teeth in a 3-Year-Old Quarter Horse Mare

Gutzmer¹,

Nijdam²

2021

Case Reports in Veterinary Medicine

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Dentigerous cysts are characterised by the formation of cysts containing dental material with a variable level of development. They are the result of a distinct embryological phenomenon. Usually, they are of significant clinical relevance in horses, especially in tandem with ectopic tooth. Contrarily, supernumerary teeth or typical polyodontias usually have limited impact. In this case report, we describe the occurrence of a supernumerary first premolar (Triadan 105). Dissimilar to known scientific literature however was the formation of a cystic structure around the supernumerary tooth. Surgical removal of the dentigerous cyst is discussed, as are the possible causes for the formation of the cystic structure. Based on this case report, we suspect that the formation of a cystic structure may not be limited to atypical polyodontias, as they may also occur in supernumerary teeth.

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“…Oft, aber nicht immer, besteht eine Fistelöffnung am Ohrmuschelrand oder direkt oberhalb der Umfangsvermehrung, aus der weiße bis bernsteinfarbene, muköse Flüssigkeit abfließt (Fessler 1988, Dicht et al 2011. Der Fistelgang ist mit Epidermis, Haarfollikeln und Drüsen ausgekleidet (Scott und Miller 2011).…”

Section: Untersuchungunclassified

“…Im Gegensatz zu anderen Haustierspezies wie Hund oder Katze (Bonath et al 1996, Boothe et al 1996 werden vor allem traumatische Ohrerkrankungen oder Tumoren der Ohrmuschel des Pferdes in der Literatur nur sporadisch aufgeführt (Palmer 1989, Bartmann und Wohlsein 2002, Kummer et al 2004, Fjordbakk et al 2006. In Fallbeschreibungen finden darüber hinaus Ohrgrundfisteln oder Schwellungen im Bereich des Ohrgrundes Berücksichtigung, die in der Mehrzahl der Fälle mit einer heterotopen Polyodontie assoziiert waren (Hunt et al 1991, Schiemann und Bartmann 2002, Cronau et al 2009, Dicht et al 2011). Lediglich Fessler (1988) fasst dabei mehrere Fälle der mit dem Leitsymptom einer Ohrgrundfistel einhergehenden Polyodontie zusammen.…”

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Aetiopathogenesis and surgical therapy of heterotopic polyodontia and aural fistula in horses

Bartmann¹,

Bienert‐Zeit²

2012

PHK

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Aetiopathogenesis and surgical therapy of heterotopic polyodontia and aural fistula in horses 14 horses of different breeds with an average age of three years were referred with the clinical signs of an auricular fistula or a swollen base of the ear. Diagnostic procedures included clinical examination with insertion of a probe into the sinus tract. Digital radiographic examination including contrast fistulography or with a metal probe within the tract was performed with lateral and oblique projections. Computed tomography of the head was added in seven of the 14 horses. In 12 horses, an aural fistula with mucous exudation was present close to the ear respectively at the margin of the ear cartilage. A swelling close to the base of the ear was present in another two horses. In ten of the 14 horses a heterotopic polyodontia could be detected radiographically with dense structures close to the temporal bone or multiple teeth like structures with enamel folds. A definite determination of the number and localization of teeth and furthermore detection of secondary lesions of surrounding bone and neurologic tissue due to compression could only be obtained with computed tomography. Following diagnostic procedures, surgical treatment was performed in 13 of the horses with complete removal of the sinus formation and heterotopic teeth. One horse did not receive surgical treatment due to the decision of the owner and to a poor prognosis for a surgical benefit. No intra-and postoperative complications could be observed except in one horse with a temporary unilateral ptosis. Functional and cosmetic results were considered to be good. It was a remarkable fact that all horses with a diagnosis of heterotopic polyodontia in this study were mares. In the majority of cases, heterotopic polyodontia was associated with the clinical presence of an aural fistula. Reversely, the primary etiology of an aural fistula was not a heterotopic polyodontia in any case, since a dermoid cyst was diagnosed in four of the horses. Despite the good surgical results in this study, surgical therapy of an auricular fistula with or without heterotopic polyodontia remains a serious procedure with the risk of complications due to the complex anatomy of the area.Keywords: Horse / head / aural fistula / heterotopic polyodontia / temporal odontma / dentigerous cyst / ear tooth / dermoid cyst / radiology / computed tomography Ursachen und chirurgische Therapie der heterotopen Polyodontie und der Ohrgrundfistel beim Pferd Einleitung

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Chirurgische Entfernung einer ektopischen Zahnanlage bei einer Isländerstute

Cited by 5 publications

References 2 publications

Dentigerous cysts with exostosis of the temporal bone in horses – A new variant diagnosed by computed tomography

Dentigerous cysts with exostosis of the temporal bone in horses – A new variant diagnosed by computed tomography

Maxillary Dentigerous Cyst with Double Wolf Teeth in a 3-Year-Old Quarter Horse Mare

Aetiopathogenesis and surgical therapy of heterotopic polyodontia and aural fistula in horses

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