Impacted teeth

Introduction to the impact tooth The teeth in the jaw are not able to erupt to the normal occlusion position due to improper position. Such teeth are called impacted teeth. The most common impacted tooth is the mandibular third molar, followed by the maxillary third molar and the maxillary canine. According to statistics, at least 20% of adults suffer from resistance to teeth. Between the impacted teeth and the gums covering it, it is easy to hide dirt, bacteria, causing bad breath and bad teeth. When the body's resistance is reduced, inflammation often occurs. Generally speaking, adults have a total of thirty-three permanent teeth and sixteen upper and lower jaws. The third molar, also known as the wisdom tooth, is the last erupted tooth in the permanent tooth. The teeth in the jaw can only partially erupt or not erupt to the normal occlusion position due to obstruction of adjacent teeth, bone or soft tissue, so it is difficult to erupt normally, and thus it is an impact tooth. basic knowledge The proportion of sickness: 0.01% Susceptible people: no specific population Mode of infection: non-infectious Complications: crowded dentition

Cause of impacted teeth

Cause of the disease (75%):

As human beings continue to purchase, the human jaw is getting smaller and smaller. When the last tooth is to erupt, the vacancies left by the jaw are not much, and it is difficult for it to erupt normally. This has caused "impedance." tooth".

Pathogenesis (15%):

Generally speaking, adults have a total of thirty-three permanent teeth and sixteen upper and lower jaws. The third molar, also known as the wisdom tooth, is the last erupted tooth in the permanent tooth. The teeth in the jaw can only partially erupt or not erupt to the normal occlusion position due to obstruction of adjacent teeth, bone or soft tissue, so it is difficult to erupt normally, and thus it is an impact tooth.

Impact prevention

Regular oral health examination, once the impact of the mandibular wisdom tooth, will cause various diseases sooner or later. Therefore, most of the impacted wisdom teeth can be removed at the age of 17-18, at least when there is no serious disease (20 years old or so) ) for preventive removal. If it can be removed early, the wounds are small, the healing is fast, and the complications of tooth extraction are less.

Impacted tooth complications Complications

Malocclusion, cranial and jaw disorders.

Symptoms of the impacted teeth Common symptoms Dental crowded misplaced irregular teeth Erupted abnormal teeth abnormal lack of wisdom teeth

The gums around the crown of the impacted tooth are often inflamed, painful, and the cheeks can swell when severe, the mouth is difficult to open, and even the whole body has a fever, and the forehead lymphadenopathy. The impacted teeth often cause symptoms such as bad gums, looseness, and alveolar bone absorption. Therefore, the impacted teeth that can cause these lesions should be removed.

Implanted tooth inspection

Oral examination:

Visual inspection:

The main complaints should be checked in a certain order, and then the other parts should be thoroughly examined.

Whether the maxillofacial region is symmetrical, with or without deformity, swelling, mass, etc., the color, arrangement, number, shape, caries, residual crown, and residual root of the tooth, and whether the color, shape and texture of the gum are changed.

Percussive method:

1 slamming the teeth with a flat-end hand-held device such as a mouth mirror or a flat-end tweezer;

2 can be divided into vertical percussion level percussion;

3 first licking the normal control teeth and then licking the teeth;

4 percussive power is light and heavy. Vertical percussion pain suggests acute apical periodontitis. Horizontal or lateral percussion pain suggests keratoconjunctivitis of the root side.

Diagnostic identification of impacted teeth

The diagnosis of impacted teeth can be performed according to the following clinical classifications:

Clinical classification of impacted teeth (third molars):

1. According to the relationship between the teeth and the lower jaw and the second molar, it is divided into:

The first type: between the lower jaw and the distal surface of the second molar, there is enough clearance to accommodate the proximal and distal diameter of the third molar crown.

The second type: the gap between the ascending branch and the distal surface of the second molar is small, and can not accommodate the near-distal diameter of the third molar crown.

The third category: all or most of the third molars are located in the lower jaw.

2. According to the depth of the tooth in the bone, it is divided into:

High position: The highest part of the tooth is parallel or higher than the (occlusal) plane.

Median: The highest part of the tooth is below the (occlusal) plane, but higher than the neck of the second molar.

Low position: The highest part of the tooth is lower than the neck of the second molar. Bone ambush (ie, the teeth are all embedded in the bone) also belong to this category.

3. According to the relationship between the long axis of the third molar and the long axis of the second molar, it can be divided into the following categories:

1 vertical impact; 2 level impact; 3 inverted impact; 4 near medium impact; 5 far middle impact; 6 buccal impact; 7 tongue to impact.

The material in this site is intended to be of general informational use and is not intended to constitute medical advice, probable diagnosis, or recommended treatments.