Oral Pathology

Non-epithelial cysts (not true cysts) Solitary bone cyst Radiology The solitary bone cyst appears as a well-defined but non-corticated radiolucency. Typically, it has little effect on adjacent structures and 'arches' up between the roots of teeth . The inferior dental canal may not be displaced, but the cortical margins of the canal may be lost where it overlies the lesion. Expansion is rare. Pathology The cyst is lined by fibrovascul…

Infective osteomyelitis Tuberculous osteomyelitis Syphilitic osteomyelitis Actinomycotic osteomyelitis Tuberculous osteomyelitis Non healing sinus tract formation Age group affected is around 15 – 40 years. Commonly seen in phalanges and dorsal and lumbar vertebrae. Usually occurs secondary to tuberculosis of lungs. Cases have been reported where mandibular lesions were not associated with pulmonary disease. Another common entran…

Bacteria adhere to acquired pellicle Coaggregation enables biofilm complexity Sucrose → lactic acid → pH drops → Hydroxyapatite dissolves Key Enzymes Recap: Invertase → splits sucrose GTF → forms sticky glucans for adhesion FTF → synthesizes fructans for biofilm scaffolding…

Shape Recognition (Classic Boards Question) Heart/Oval Shape → Nasopalatine cyst Inverted Pear/Teardrop → Globulomaxillary cyst No Radiographic Feature → Nasolabial cyst Location-Based Diagnosis Midline Maxilla (anterior) → Nasopalatine cyst Between maxillary lateral incisor & canine → Globulomaxillary cyst Midline Mandible → Median mandibular cyst Nasolabial fold → Nasolabial cyst Clinical Cor…

Condition Key Features Paget's Disease - Denture tightening (arch expansion) - Chalk-stick fractures - Leontiasis ossea Osteopetrosis - Rugger jersey spine - Chalk-stick fractures Fibrous Dysplasia - Leontiasis ossea - Chinese script trabeculae - Ground glass appearance - Hockey stick femur Cemento-Ossifying Fibroma - …