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The Structure of Odontogenic Cysts
Published in Roger M. Browne, Investigative Pathology of the Odontogenic Cysts, 2019
A dentigerous cyst is, by definition, one which encloses the crown of the associated unerupted tooth and is attached to it in the region of the amelocemental junction. However, it is important to appreciate that other cystic lesions may have a similar relationship. These lesions include the adenomatoid odontogenic tumor and ameloblastoma, in particular the unicystic form of the tumor which has been variously reported as unicystic ameloblastoma,58 cystic ameloblastoma,59 mural ameloblastoma,60 and plexiform unicystic ameloblastoma.61,62 Occasionally, also, the odontogenic keratocyst has a dentigerous relationship to an unerupted tooth, although as mentioned earlier, this is not the usual situation when this type of cyst arises in association with an unerupted tooth. More often than not, the tooth becomes separated from the cyst wall during the surgical removal of a dentigerous cyst and so it is not always possible to determine the precise relationship between the two. If removed intact, however, the approximately spherical cystic mass contains at one point the projecting roots of the associated tooth: on opening into the cyst lumen, the crown of the tooth is observed projecting into it (Figure 17).
Ameloblastic Fibro-Odontoma
Published in Fetal and Pediatric Pathology, 2023
Moeinadin Safavi, Farnoosh Mohammadi
The presence of radio-opaque content may help exclude the more common radiolucent lesions like dentigerous cyst and keratocystic odontogenic tumors. Adenomatoid odontogenic tumor is another benign tumor that may present as opacification in imaging (called “snow flake”) but it has a predilection for anterior maxilla. Calcifying epithelial odontogenic tumor or Pindborg tumor which also involves the posterior mandible often has “driven-snow” calcification pattern but can be differentiated from AFO as the former is an infrequent tumor found predominately in adults. By histology, Pindborg tuomrs show islands, cords, trabeculae or sheets polyhedral and pleomorphic epithelial cells with abundant eosinophilic cytoplasm. These neoplastic cells secret amyloid protein that calcifies. AFO has a different morphology and does not produce amyloid [4].
Pain, discomfort, and functional impairment after extraction of primary teeth in children with palatally displaced canines – a randomized control trial comparing extraction of the primary canine versus extraction of the primary canine and the primary first molar
Published in Acta Odontologica Scandinavica, 2023
Sigurd Hadler-Olsen, Jeanett Steinnes, Hege Nermo, Anders Sjögren, Elin Hadler-Olsen
Primary tooth extractions are commonly performed as part of interceptive orthodontic treatment, to improve the eruption path of palatally displaced canine teeth [4]. Ectopic eruption and impaction of the maxillary canine occur in one to three percent of children [5–7]. Left untreated, problems such as dispositioning and retention of the ectopic tooth, external root resorption, migration of neighbouring teeth, dentigerous cyst formation and referred pain may occur [8]. Extraction of the primary maxillary canine (single extraction) is the most common treatment for preventing ectopic eruption and impaction of PDCs, and the effect has been documented in many studies [9]. Recently, extraction of both the primary canine and the primary first molar (double extraction) has been suggested as an alternative treatment method [10,11]. Double extraction has been reported to have a better effect on PDC eruption than single extraction [10,11], but the results are controversial [12]. To our knowledge, no study has reported patient perceptions of discomfort and pain or effect on daily activities and oral functions of these treatment alternatives. The current study had two main objectives: 1) to compare pain, discomfort, and functional impairment in children experiencing single- and double extractions as treatments for PDCs, and 2) to increase knowledge regarding pain, discomfort, and functional impairment associated with primary tooth extraction.
Relevance of periodic evaluation of endodontically treated primary teeth
Published in Libyan Journal of Medicine, 2019
Sally Kamal El-Din Mohamed, Huda Abutayyem, Said Abdelnabi, Juma Alkhabuli
Dentigerous cyst (DC) is a developmental odontogenic cyst that invariably occurs between the second and third decade with low incidence in young individual. However, they may develop in association with unerupted premolars or supernumerary teeth [2,3]. Although the DCs are developmental in origin, there is a strong association between the DC development and the inflammation spreading from nonvital predecessor teeth [4].