When to extract the wisdom tooth? Warning signs and clinical criteria

Wisdom teeth are probably the teeth that generate the most doubts and the most anxiety. They appear late, often cause discomfort and there is a widespread idea that their extraction is inevitable. Not quite.

Wisdom tooth extraction is, in many cases, the most indicated clinical decision. The question is not whether wisdom teeth exist, but what they are doing and the risk they pose. It is this assessment that determines the path to follow.

What are wisdom teeth and why do they appear late

Wisdom teeth are the third molars, the last teeth to erupt. They usually appear between the ages of 17 and 25, at a stage when the dental arch is already formed. This timing is part of the problem: there is often not enough space to accommodate them.

When wisdom teeth erupt and what can happen

The way the wisdom tooth erupts depends on the space available, the angle at which it is in the bone and the individual anatomy of each person. There are those who have four wisdom teeth, those who have two, those who have none. There are wisdom teeth that erupt without incident and wisdom teeth that never completely come out of the gums.

• When the wisdom tooth does not have enough space to erupt in the correct position, it can become partially covered by the gums, tilted over the adjacent tooth, or completely retained in the bone. Each of these situations has different clinical implications;

• The partial eruption, in which the wisdom tooth is covered by a gum flap, creates a hard-to-clean space where bacteria accumulate easily. This increases the risk of local infection, known as pericoronitis.

Signs when the wisdom tooth is erupting

There is no list of symptoms that guarantees that extraction is necessary. But there are signs that, alone or together, warrant urgent clinical evaluation and make extraction likely.

Pain, inflammation, and recurrent infection

Pain in the wisdom tooth area can have several origins: pressure on neighboring tissues, inflammation of the gums that cover it, infection or caries in the tooth itself. Identifying the cause is the first step.

• When inflammation in the wisdom tooth area is recurrent, with episodes of pain, swelling and difficulty opening the mouth that recur over time, extraction tends to be recommended. Recurrence indicates that the cause will not resolve spontaneously;

• Infection associated with a wisdom tooth can, in more severe cases, spread to neighboring tissues. It is a situation that requires quick attention and that, when repeated, clearly weighs in favor of extraction.

Included or impacted wisdom tooth

An impacted wisdom tooth is one that, due to lack of space or being in an incorrect position, cannot erupt completely. It can be partially covered by the gums or completely retained inside the bone.

• Included wisdom teeth do not always cause immediate symptoms. But they can develop complications over time, including cysts, resorption of the adjacent tooth root, or infection. Therefore, even in the absence of pain, its presence warrants regular monitoring;

• The decision to extract an asymptomatic included wisdom tooth is not automatic. It depends on the position of the tooth, proximity to important anatomical structures, the age of the patient and the estimated risk of future complications.

Risk to adjacent teeth

When the wisdom tooth is tilted toward the second molar, the pressure it exerts can cause damage to the neighboring tooth. This is a relevant clinical criterion, regardless of whether or not the patient experiences pain.

• The resorption of the root of the second molar by pressure from the adjacent wisdom tooth is a possible complication and, if not identified in time, can compromise a tooth that until that moment was healthy;

• Tooth decay between the wisdom tooth and the second molar is also frequent in these situations: the narrow space is difficult to access for the toothbrush and floss, which favors the accumulation of bacterial plaque.

Impact on tooth alignment

The relationship between wisdom teeth and tooth alignment is a less linear topic than is often assumed. Wisdom teeth are not always responsible for the alignment of the anterior teeth. But in orthodontic contexts, its presence may be relevant.

How is the clinical evaluation for wisdom tooth extraction done?

The decision to extract or not a wisdom tooth is not made on the basis of isolated symptoms or generalizations. It requires a clinical evaluation that includes examination of the mouth, analysis of the position of the tooth and, almost always, imaging tests.

Panoramic radiography allows you to see the position of the wisdom teeth, their relationship with the roots of adjacent teeth and the proximity to the inferior alveolar nerve, an anatomical element relevant especially in the extraction of the lower wisdom teeth. In more complex cases, a cone beam CT scan may be indicated, which provides a more detailed three-dimensional image.

Based on this information, the dentist or oral surgeon explains what is happening, what are the risks of acting and not acting, and what the recommendation is for that specific case. It is a shared decision, based on data and not on assumptions.

If you feel discomfort in the wisdom teeth area or simply want to understand what the situation of your loved ones is, an evaluation consultation is the right step. Only with clinical and imaging examination is it possible to give a reasoned answer.