20052

• A talon cusp is a developmental dental anomaly featuring an extra cusp (often V-shaped) projecting from the cingulum of an anterior tooth (typically maxillary incisors). On radiographs, it appears as a radiopaque projection that can mimic a small, separate supernumerary tooth due to its location and density.

• Dense in dente is due to invagination of enamel epithelium into the pulp resulting in radiographic appearance of infolding of enamel into the pulp chamber.

42790

A periapical (radicular) cyst is a true cyst because it features a pathologic cavity lined by stratified squamous epithelium, typically derived from the cell rests of Malassez. Radiographically, they are usually larger than 1 cm and exhibit a well-defined cortical border.

23499

Ostectomy procedures are indicated for reverse architecture bone defects.

17213

For an 8-year-old child with TMJ ankylosis, the treatment of choice is gap arthroplasty with costochondral grafting.

36252

Pericoronitis is often caused by the accumulation of food debris and bacteria beneath the operculum, which is the gum tissue covering the partially erupted tooth. Trauma from the opposing tooth can exacerbate this condition by further irritating the gum and facilitating the entry of bacteria.

84153

Modern AAE terminology replaced "Chronic apical periodontitis" with "Asymptomatic apical periodontitis".

86616

Myocardial infarction is usually due to thrombus formation. Rupture or erosion of an atherosclerotic plaque triggers platelet aggregation and thrombus formation, completely occluding the coronary artery. This acute occlusion leads to myocardial necrosis.

98872

The exact cause of Bell's palsy remains idiopathic in many cases, although some believe viral infections may trigger it.

87748

The average leeway space in the maxilla (both right and left sides) is 1.8 mm.

Leeway space is the amount of space available for the movement of teeth in the maxilla and mandible during orthodontic treatment. It is calculated by subtracting the combined mesiodistal width of the mandibular incisors from that of the maxillary incisors. This space is crucial in determining the potential for tooth movement, particularly in cases where there is crowding. The answer of 1.8 mm is a commonly accepted average value in the field of orthodontics.

93458

Dry socket, also known as alveolar osteitis, is a painful condition that occurs after a tooth extraction when the blood clot fails to form or is dislodged before the wound has a chance to heal. It is an inflammation of the bone (osteitis) in the tooth socket, specifically the alveolar bone, but does not involve an infection of the bone marrow, which would be osteomyelitis.