ABSTRACT
BACKGROUND: Since there are many differential diagnoses for cemento-osseous dysplasia (COD), it is very difficult for dentists to avoid misdiagnosis. In particular, if COD is related to an embedded tooth, differential diagnosis is difficult. However, there have been no reports on the characteristics of the imaging findings of COD associated with embedded teeth. The aim of the present study was to investigate the occurrence and imaging characteristics of cemento-osseous dysplasia (COD) associated with embedded teeth, in order to appropriately diagnose COD with embedded teeth. METHODS: The radiographs with or without histological findings of 225 patients with COD were retrospectively analyzed. A retrospective search through the picture archiving and communication system (PACS) of the Division of Oral and Maxillofacial Radiology of Kyushu Dental University Hospital was performed to identify patients with COD between 2011 and 2022. RESULTS: Fifteen COD-associated embedded mandibular third molars were identified in 13 patients. All 13 patients were asymptomatic. On imaging, COD associated with embedded mandibular third molars appeared as masses that included calcifications around the apex of the tooth. On panoramic tomography, COD showed inconspicuous internal calcification similar to that of odontogenic cysts or simple bone cysts, especially in patients with COD only around the mandibular third molar region. Those with prominent calcification resembled cemento-ossifying fibroma, calcifying epithelial odontogenic tumor, calcifying odontogenic cyst, adenomatoid odontogenic tumor, and so on, as categories of masses that include calcifications on panoramic tomography and computed tomography. CONCLUSIONS: The current investigation is the first to report and analyze the imaging characteristics of COD associated with embedded teeth. It is important to consider the differences between COD and other cystic lesions on panoramic tomography, and the differences between COD and masses that include calcifications on CT.
Subject(s)
Cementoma , Odontogenic Tumors , Humans , Retrospective Studies , Odontogenic Tumors/complications , Odontogenic Tumors/diagnostic imaging , Cementoma/diagnostic imaging , Cementoma/pathology , Radiography , Tomography, X-Ray ComputedABSTRACT
Epidermoid cysts are generally benign neoplastic lesions, the etiology of which is unclear and is mainly related to epithelial cells left in the tissues during the embryonic period and traumatically implanted in the tissues. The most common intraosseous sites are the phalanges and the skull. Epidermoid cysts occurring in the jaws are clinically rare. In this paper, we report a case of epidermoid cyst occurring in the mandible with embedded teeth and discuss the etiology, clinical manifestations, diagnosis, and treatment of epidermoid cysts in the jaws in the context of the relevant literature.
Subject(s)
Epidermal Cyst , Humans , Epidermal Cyst/diagnosis , Epidermal Cyst/surgery , Skull , Mandible , Diagnosis, Differential , Epithelial CellsABSTRACT
Ectopic eruption results from a disturbance in tooth development and eruption, leading to an erupted or non-erupted tooth being in an unexpected anatomical location. This retrospective case series describes the location, position, form, and clinical signs associated with ectopic eruption in dogs. Thirty-five dogs (46 teeth) were diagnosed with ectopic eruption at three clinical practices during 2017-2020. The cases were described in terms of the location, the development and eruption status, the clinical signs, the consequences, and the treatment performed. The collected data were statistically analyzed to establish possible ramifications. The results showed that the ectopic eruption in the evaluated cases involved permanent teeth, mainly located in the maxilla, and mostly unerupted. Those located in the mandible were significantly more impacted than those located in the maxilla. This study concluded that tooth crowding and malocclusion (39.1%), facial swelling (8.6%), and periodontal disease (8.6%) were associated with the presence of ectopic eruption, and consequently, treatment was required in the majority (65.2%) of cases.
Subject(s)
Dog Diseases , Malocclusion , Tooth Eruption, Ectopic , Tooth, Impacted , Animals , Dogs , Retrospective Studies , Tooth Eruption , Tooth, Impacted/veterinary , Maxilla , Tooth Eruption, Ectopic/diagnosis , Tooth Eruption, Ectopic/surgery , Tooth Eruption, Ectopic/veterinary , Malocclusion/veterinary , Dog Diseases/diagnosis , Dog Diseases/etiology , Dog Diseases/surgeryABSTRACT
Epidermoid cysts are generally benign neoplastic lesions, the etiology of which is unclear and is mainly related to epithelial cells left in the tissues during the embryonic period and traumatically implanted in the tissues. The most common intraosseous sites are the phalanges and the skull. Epidermoid cysts occurring in the jaws are clinically rare. In this paper, we report a case of epidermoid cyst occurring in the mandible with embedded teeth and discuss the etiology, clinical manifestations, diagnosis, and treatment of epidermoid cysts in the jaws in the context of the relevant literature.
Subject(s)
Humans , Epidermal Cyst/surgery , Skull , Mandible , Diagnosis, Differential , Epithelial CellsABSTRACT
Las tracciones orto-quirúrgicos son técnicas ampliamente utilizadas en odontología para la reposición en oclusión de dientes que incluidos. Nuestro objetivo fue evaluar la resistencia a la tracción de tres tipos de dispositivos de tracción. En este estudio in vitro fueron utilizados 45 premolares sanos, conservados inicialmente en suero fisiológico al 0,9%; fueron divididos en tres grupos, de los cuales 15 recibieron la instalación de brackets, 15 recibieron botones ortodóncicos y 15 recibieron la instalación de mallas. La adhesión fue realizada con resina de autocurado y en todos ellos se instaló un alambre ortodóncico de 0,30mm; los dientes fueron fijados con resina acrílica y almacenados en suero fisiológico al 0,9% por 72 horas. A continuación fueron sometidos a test de tracción mecánica, con una tracción máxima de 50N, siendo analizados con del programa Logger Pro®. Los brackets demostraron mayor resistencia a la tracción (44,6N), seguidos por los botones y finalmente por las mallas (32N). La principal área de falla fue la interface dispositivo/resina, siendo las mallas las que presentaron el mayor índice de fracaso (66%). Ningún alambre presentó ruptura en los análisis ejecutados. Las mallas presentan los resultados mecánicos más pobres cuando son comparados con botones y brackets; el área de ruptura más frecuente corresponde a la interface dispositivo/resina
Ortho-surgical tractions are techniques very used in dentistry for the reposition in occlusion of embedded teeth. The aim of this research was to evaluated the resistance to traction of three kind of devices used in a traction technique. In this in vitro research was used 45 bicuspid, initially maintained in saline solution (0,9%); were formed three groups, where 15 received brackets, 15 received button and 15 received mesh. The adhesion was do it with self-curing resin and in all of them was installed an orthodontics wire of 0,30 mm; the teeth was fixed with acrylic resin and maintained in saline solution (0,9%) for 72 hours. Follow that, the samples were submitted to mechanical traction test, with maximum traction of 50N, being analyzed with Logger Pro software. The brackets show more resistance to the traction (44,6N), follow that button and finally for mesh (32N). The principal areas of fracture was to device/resin interface, presented the mesh a more failure percentage (66%). Non wire presented fracture in the analyses. The mesh present poor results when compared to buttons and brackets; the more prevalent area failure was device/resin interface
Subject(s)
Orthodontic Wires , In Vitro Techniques , Orthodontic Appliances , Tensile Strength , Orthodontics , Tooth EruptionABSTRACT
Objective To evaluate the radiation dose in both low radiation dose and to conventional radiation dose mode in multislice spiral CT scan for children with embedded teeth,and explore the lowest conditions of exposure in multislice spiral CT scan for children embedded teeth.Methods Eighty cases of children with embedded teeth examined by 16 slices spiral CT were divided into 5 ,25,125 and 250 mAs scanning groups.The scanned pictures of four groups were evaluated by two chief physicians and three associate chief physicians in the radiological department with double blind method.The CTDI_w and DLP in different radiation dose mode were recorded and analyzed with statistics.Results All the four groups scanned pictures in different radiation dose mode could accurately show the structure and the adjacency relation of embedded teeth.Even though the resolution of scanned pictures in S mAs group were inferior to the other three groups on bone trabecula,gingiva and their surrounding soft tissue,it still could meet the requirements of examination.The average DLP in 5 mAs group was only 2% of value in 250 mAs group.Conclusions MSCT in 5 mAs group can not only meet the requirements of examination,but also reduce the radiation dose to patients to the greatest extent.
