This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Dental
Occlusal loading resulting in tooth flexure, mechanical microfractures, and loss of tooth substance in the cervical area is 
Select and explain. 
A. Abrasion, B. Attrition, C. Erosion, D. Abfraction
D: Abfraction
Answer: D: Abfraction 
Explanation: Wasting diseases of the teeth include erosion (corrosion; may be caused by acidic beverages), abrasion (caused by mechanical wear as with toothbrushing with abrasive dentifrice), attrition (due to functional contact with opposing teeth), and abfraction (flexure due to occlusal loading).