AKA Dense bone island, bone eburnation, bone whorl, bone scar, enostosis, focal periapical osteopetrosis Cause Focal area of increased radiodensity that is of unknown cause and cannot be attributed to any inflammatory, dysplastic, neoplastic, or systemic disorders Incidence Increased frequency in blacks and Asians. No sex predilection. Most arise in late first or early second […]
Idiopathic Osteosclerosis Read Post »
Cause Area of hematopoietic marrow that produces area of radiolucency. Can be a result of aberrant bone regeneration after tooth extraction, persistent fetal marrow, marrow hyperplasia in response to increased demand for erythrocytes. Incidence 75% are adult women Location 70% occur in posterior mandible, most often in edentulous areas Clinical Features Typically asymptomatic and found
Focal Osteoporotic Marrow Defect Read Post »
Incidence Children and young adults Clinical Presentation Blue dome shaped, fluctuant swelling in the floor of the mouth. Located lateral to the midline (dermoid cyst are midline) Arises from superficial ducts of Rivini of sublingual gland. Location FOM, lateral to midline Plunging Ranula Spilled mucin dissects through the mylohyoid muscle and produces a swelling in
AKA Mucus Retention Cyst; Mucus Duct Cyst; Sialocyst Incidence usually occur in adults Location Intraoral cysts can occur at any minor gland site, but most frequently develop in the FOM, buccal mucosa, and lips. Cause Cystic dilation may develop secondary to ductal obstruction – represent salivary ductal ectasia rather than a true cyst. Clinical Presentation
Salivary Duct Cyst Read Post »
Cause Locally destructive inflammatory condition of the salivary glands Result of ischemia of the salivary tissue that leads to local infarction Predisposing factors that may compromise blood supply to the involved gland include: traumatic injuries, dental infections, ill-fitting dentures, upper respiratory infections, adjacent tumors, previous surgery Incidence More common in adults, mean age 46 Male
Necrotizing Sialometaplasia Read Post »
AKA Mucus Extravasion Phenomenon, Mucus Escape Reaction Incidence Children and young adults Cause Spillage of mucin from ruptured salivary gland duct into surrounding tissue, often due to trauma Clinical Presentation not a true cyst because it lacks epithelial lining mucin below the mucosal surface imparts a bluish translucent hue Often fluctuant, but can feel firmer
The ameloblastic fibroma may behave either as a true neoplasm or as a hemartomatous proliferation of odontogenic epithelium of the enamel organ and odontogenic mesenchyme of the primitive dental pulp. Incidence Mean age range is 6 to 12 years, and only a few cases seen after the age of 25 years. No sex predilection Clinical
Ameloblastic Fibroma Read Post »
Incidence children, mean age 10, rarely encountered in adults Location posterior jaws, majority involve the mandible; male>female (3:2) Radiographic Features well-circumscribed unilocular radiolucent lesion containing variable amounts of calcified material with the radiodensity of tooth structure. The calcified material may appear as multiple, small radiopacities or as a conglomerate mass. Only 5% of ameloblastic fibro-odontomas
Ameloblastic Fibro-Odontoma Read Post »
AKA Pinborg Tumor Incidence Accounts for less than 1% of odontogenic tumors. Most common from 30 to 50 years of age. No sex predilection. Location 2/3 of cases in mandible, most often in posterior area Origin The tumor bears close morphologic resemblance to the cells of the stratum intermedium of the enamel organ. Others suggest
Calcifying Epithelial Odontogenic Tumor Read Post »
Overview Slow growing, locally invasive tumors Relative frequency equals the combined frequency of all other odontogenic tumors, excluding odontomas Tumors arising from rests of dental lamina, from a developing enamel organ, from the epithelial lining of odontogenic cyst, or from the basal cells of the oral mucosa Not neurotrpic (do not invade nerve) but are
