Clinical Radiology - Acquired Dental Anomalies Flashcards
Which acquired dental anomalies have to do with dental wear?
Attrition
Abrasion
Erosion
Abfraction
Which acquired dental anomalies have to do with resorption?
Internal resorption
External resorption
What are the 4 categories of acquired dental anomalies?
Dental wear
Resorption
Pulpal calcifications
Hypercementosis
Gradual loss of dental hard tissue as a result of chewing
Attrition
Curved surfaces of teeth are gradually altered to flat planes
Attrition
What factors may accelerate attrition?
Bruxism, diet
Crowns shortened coronal-apically; many adjacent teeth in each arch may show wear pattern
Attrition
Incisal edges of mandibular incisors become pitted or “dished out”
Attrition
In both attrition and abrasion:
Enamel wears away, dentin becomes exposed, and there is deposition of secondary dentin. What does this cause?
Decreased pulpal space
There is a reduction in the size of pulp chamber and canals, but the PDL space widens
Attrition
Gradual loss of dental hard tissue as a result of external mechanical action
Abrasion
Which acquired dental anomaly?
Parafunctional habits (holding objects btwn teeth, toothpicks)
Poorly-fitting partial denture or retainer
Brushing or floss injuries (hard bristles, abrasive toothpaste, excessive pressure)
Abrasion
What type of injury causing abrasion?
Radiolucent, well-defined defects at cervical level of teeth; contralateral to dominant hand
Toothbrush injury
What type of injury causing abrasion?
Radiolucent, semilunar, well-defined defects in the interproximal surfaces of the cervical level of teeth; usually more present on distal side
Floss injury
What type of injury causing abrasion?
Radiolucent, semilunar, well-defined defect in distal surfaces at the cervical level of teeth
Poorly-fitting partial denture
Gradual loss of dental hard tissue as a result of chemical injuries (not involving bacteria)
Erosion
Caused by excessive intake of acid beverages, gastric reflux, and bulimia
Erosion
Smoothly outlined defects on enamel and underlying dentin
Erosion
Dentin, enamel, and restoration are all worn to the same level
Attrition
Dentin and enamel are worn to the same level, but restorations are elevated
Erosion