wedge-shaped defect
Introduction
Introduction to wedge-shaped defects The wedge-shaped defect is a defect caused by the slow consumption of the hard tissue of the tooth lip and the buccal neck. It is named because the defect is often wedge-shaped. The prevalence of wedge-shaped defects and the severity of defects increase with age. Due to the different populations and standards adopted, the results of foreign data are 5% to 85%, and domestic 5% to 99.1%. basic knowledge The proportion of illness: 0.005% Susceptible people: no specific population Mode of infection: non-infectious Complications: endodontic disease
Cause
Wedge defect
Brushing wear (60%)
Brushing is the main cause of wedge-shaped defects. Therefore, some people refer to the wedge-shaped defect as brushing wear. The reasons are:
1 People who do not brush their teeth rarely have typical wedge-shaped defects, and those who brush their teeth, especially those who use forceful brushing, often have typical and severe wedge-shaped defects. 2 does not occur on the tongue of the tooth. 3 The wedge-shaped defect of the lip is often severe. 4 wedge-shaped defects of the teeth are often accompanied by gingival recession. There are also experiments to prove that brushing the teeth as a single factor can cause tooth neck defects.
The role of acid (25%)
The acid exudate in the sulcus is related to the defect. Clinically, the defect of the hard tissue under the gingival margin is sometimes seen, which is the result of the erosion of the acidic secretion in the sulcus.
The neck structure is weak (5%)
The structure of the tooth neck is weak in the structure of the bone and enamel at the bone boundary, which is easy to be worn away, which is conducive to the occurrence of defects.
Dental material fatigue (3%)
Recently, studies have shown that the buccal side of the neck, long-term chewing, fatigue of the tooth material, damage in the stress concentration area, easily lead to tooth damage.
Prevention
Wedge defect prevention
Correct the brushing method, avoid the horizontal brush, and choose a softer toothbrush and a thinner toothpaste. Remove the bite interference of the affected teeth, correct the chewing habits of the flank, balance the burden of the full mouth bite force, correct the acidic environment in the mouth, change the eating habits, treat the stomach, and rinse the mouth with a weak alkaline gargle, such as 2% baking soda solution. .
Complication
Wedge defect complications Complications, pulp disease, periapical periodontitis
1. A typical wedge-shaped defect consists of two planes intersecting, some consisting of three planes, the edges of the defect are neat, the surface is smooth, and sometimes there are different degrees of coloration.
2, shallow and deep defects can be asymptomatic, can also occur dentin hypersensitivity, deep into the pulp defect can have pulp disease, apical periodontitis symptoms, and even tooth cross-fold.
3, good for the premolars, especially the first premolars, when the teeth are stressed, generally have gums retracted.
4. The older the age, the more severe the wedge-shaped defect.
Symptom
Wedge defect symptoms common symptoms molar tooth injury gum atrophy
1. Typical wedge-shaped defect, which is formed by the intersection of two planes, some consists of three planes, a few defects are oval, the edges of the defect are neat, the surface is hard and smooth, generally the tooth tissue is natural, sometimes there may be Coloring of varying degrees.
2. According to the degree of defect, it can be divided into three types: shallow, deep and penetrating. The shallow and deep can be asymptomatic, and dentin hypersensitivity can also occur. The depth and symptoms are not necessarily proportional. The key is individual difference. Sexual, perforated with pulp disease, symptoms of periapical disease, and even tooth cross-folding.
3. It is good for the first premolar, which is located at the most prominent position of the arch of the arch. When the tooth is brushed, the force is large and the number of times is high. Generally, the gums are retracted.
4. With the increase of age, the wedge-shaped defect has an increasing trend. The older the age, the more severe the wedge-shaped defect.
Examine
Wedge defect examination
1. The examination of wedge-shaped defects is mainly based on clinical routine examination.
2. For suspected concurrent pulp disease, apical periodontitis and other examinations can be added to the "A" within the inspection frame.
Diagnosis
Diagnosis of wedge-shaped defects
Wedge defects are distinguished from caries and dentin hypersensitivity.
Teeth hypersensitivity is mainly caused by irritation. When brushing teeth, eating hard objects, eating acid, sweet, cold, hot, etc., it causes soreness, especially for mechanical stimulation. The most reliable diagnostic method is to use sharp probes. Slide on the tooth surface to find one or several allergies.
Caries are most likely to occur in the bite-faced fossa of the molars and bicuspids, in the fissures, and in the contact surfaces of adjacent teeth. The former is called the fissure sulcus, the latter is called the adjacent sputum, and the child is in the neck of the tooth. There are very few caries, which can only be seen when severe malnutrition or certain systemic diseases make the body extremely weak. According to the degree of caries destruction, the clinical can be divided into shallow, middle and deep.
