The most common site is the frontal sinus, followed by ethmoidal and maxillary sinuses. In the maxillofacial region, osteomas occur most frequently in the sinuses. Osteomas are more commonly found in the cortical plate of long bones such as the femur and the tibia. 7 They are more frequent in males than females (approximately 2:1). Osteomas in the maxillofacial region have been reported in patients between 29.4 and 40.5 years. 5 There are reports of cases varying from 16 to 74 years of age, with a mean age between 10 and 25 years. Osteomas can occur at any age, but are found most frequently in individuals older than 40 years. 12 Central osteomas arise from the endosteum, peripheral osteomas from the periosteum and extra-skeletal osteomas usually develops within a muscle. 1,2 There are three different types of osteomas: central, peripheral and extra-skeletal. Osteomas are benign, osteogenic lesions that may arise from proliferation of cancellous (trabeculae), compact bone (dense lamellae) or can be composed by a combination of both. Given that the patient was asymptomatic, treatment was not required. The panoramic radiograph demonstrated a unilateral, well-circumscribed, mushroom-like radiopacity located at the left angle of the mandible. The patient was completely asymptomatic with no history of previous facial trauma or contributory medical factors. The lesion was found incidentally in a dental panoramic tomography during routine evaluation for dental treatment ( Fig. Case reports Case 1Ī 57-year-old male patient was referred to the Department of Oral Radiology for evaluation of a radiopaque mass located on the left side of the mandible. The objective of this article is to present the radiographic features of two cases of osteomas, one in the lingual site of the mandibular angle and another one on the zygomatic arch. Osteomas can cause facial deformity, limitation or deviation of the mandible on opening, headache, bone pain, dysphagia or exophthalmos. Since osteoma is often detected incidentally on routine radiographic examination, the dentist should be aware of the features of this lesion. 1,5,8,10 In these cases, surgery is usually required. It is usually asymptomatic, and exhibit continuous growth at adulthood but it can grow into large sizes and cause facial asymmetry or severe dysfunction. 7,9 Osteomas are more commonly found in the cortical plate of long bones but they can also affect the maxillofacial region. 1–8 There are three different types of osteomas: central, peripheral and extra-skeletal. This view was first described by Charles A Waters and C W Waldron, American radiologists, in 1915 3.Osteomas are benign, osteogenic lesions that may arise from proliferation of cancellous (trabeculae), compact bone (dense lamellae) or can be composed by a combination of both. Use a side marker and regularly place in PA skulls can get tricky with figuring out which side is which many vendors tend to "flip" images to make them appear AP Guarantee that the patient is not "hunched" over when they are being examined, this can cause an artifact from the shoulders and the patient is more likely to be rotated it is best to move the chair up close to the detector so they are sitting up straight for the image Learn your skull positioning lines, it makes for reading position guides a lot easier Generally, the base of the mandible and the occiput will be superimposed The petrous ridge should be inferior to the maxillary sinusesĪssess for rotation via the assessments of the coronoid process symmetry Inferior to include the most inferior aspects of the skull The chin is raised until the mento-mandibular line (MML) is perpendicular to the receptor (orbitomeatal line (OML) will be 37° from receptor) 2 The patient is erect facing the upright detector In general, radiographs of the skull and facial bones are rapidly becoming obsolete, being replaced by much more sensitive CT scans. It can be used to assess for facial fractures, as well as for acute sinusitis.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |