Dental cysts are usually caused due to root infection involving tooth decay. Untreated dental caries then allow bacteria to reach the level of the pulp, causing infection. The bacteria gains access to the<unk>  region of the tooth through deeper infection of the pulp, traveling through the roots. The resulting pulpal necrosis causes proliferation of epithelial rests of Malassez which release toxins at the apex of the tooth. The body's inflammatory response will attack the source of the toxins, leading to<unk>  inflammation. The many cells and proteins that rush to an area of infection create osmotic tension in the periapex which is the source of internal pressure increase at the cyst site. These lesions can grow large because they apply pressure over the bone, causing resorption. The toxins released by the breakdown of granulation tissue are one of the common causes of bone resorption. There are two schools of thought regarding cyst expansion. # Complementary response to inflammation # Chemical reaction with Interleukin and Prostaglandin
Periapical cyst
Subareolar abscess
Nabothian cyst
Proliferating trichilemmal cyst
Keratin implantation cyst
Trichilemmal cyst
Limbal nodule
Genu recurvatum