It is a defect in the neck of the tooth formed by slow depletion, in the shape of a “V”, which is called “wedge-shaped defect” because of its resemblance to a carpenter’s wedge. We can do a self-examination: look in the mirror and see if there is a small defect in the neck of the tooth (as shown in the picture above). I. What causes wedge-shaped defects? 1, incorrect brushing method 2, weak tissue in the neck of the teeth Teeth also have weak parts, that is, the neck of the teeth, this place has the least enamel coverage, so the gums are also prone to inflammation or atrophy resulting in the exposure of the tooth, so the wear resistance is the worst. 3, the role of squeeze In brushing, the cheek muscles on the toothbrush there is a squeeze, this squeeze makes the toothbrush on the teeth more friction, intensifying the horizontal brushing tooth way on the tooth neck protruding part of the wear. 4, the role of acid The acid in the gingival sulcus fluid is associated with wedge defects, which explains the occurrence of defects on the root side of the gingival margin. Patients with gastritis and teeth of people with frequent acid reflux are also prone to wedge defects. Second, how to treat? Mild defect For those who have little tissue defect and no acidic symptoms, no special treatment is needed locally. However, it is necessary to avoid horizontal brushing and use a softer toothbrush and toothpaste with finer abrasives. Moderate defect The wedge-shaped defect can be filled with composite resin or glass ionomer with similar color to the tooth and certain adhesive to prevent further development. Severe defects Patients with severe defects due to pulpitis and apical infection should be treated promptly. Wedge defect is not too complicated, and timely treatment can reduce the pain caused by dental disease and tooth loss. Third, how to prevent? Choosing the right toothbrush and brushing with the right way is indispensable to prevent wedge defect. In fact, when you feel symptoms such as tooth discomfort and soreness, the problem is already quite serious. Therefore, it is recommended to check your teeth once every six months if conditions permit.