When Do Wisdom Teeth Come In?
Wisdom teeth, also called third molars, are the last permanent teeth to develop. Most people have four wisdom teeth, one in each corner of the mouth. They typically begin pushing through the gums between ages 17 and 25, though some people develop them earlier or later. A small percentage of people never develop wisdom teeth at all.
The teeth themselves begin forming in the jawbone during the early teenage years. They gradually move toward the surface over several years. By the mid-twenties, they have either erupted into the mouth or become impacted (stuck beneath the gum or bone). Dental X-rays can show developing wisdom teeth years before any symptoms appear.
Symptoms of Wisdom Teeth Coming In
When wisdom teeth begin to push through the gum tissue, you may notice several symptoms. These are often mild at first and come and go over weeks or months as the teeth move.
Normal Eruption Symptoms
These symptoms are common during normal wisdom tooth eruption and are usually manageable with over-the-counter pain relief and warm saltwater rinses.
- Dull pressure or aching at the back of the jaw, behind your last molar
- Swollen or tender gum tissue in the area where the tooth is emerging
- A hard bump you can feel with your tongue at the back of the gum line
- Mild jaw stiffness or difficulty opening your mouth wide
- Occasional headaches on the affected side
Symptoms That Suggest a Problem
These symptoms may indicate an infection (pericoronitis), impaction, or damage to adjacent teeth. Contact your dentist or an oral surgeon promptly if you experience any of these.
- Persistent or worsening pain that does not respond to over-the-counter medication
- Swelling in the gum, cheek, or jaw that spreads or does not improve
- Pus or a bad taste in the mouth near the back molar area
- Difficulty swallowing or opening the mouth
- Red, inflamed gum tissue that bleeds easily when touched
- Pain or sensitivity in the neighboring tooth (the second molar)
What Is Wisdom Tooth Impaction?
A wisdom tooth is considered impacted when it cannot fully emerge into the mouth because of insufficient space, bone obstruction, or an abnormal growth angle. Impaction is very common, affecting an estimated 70% to 80% of people with wisdom teeth.
Impacted wisdom teeth may cause no symptoms at all, or they may cause pain, infection, and damage to surrounding teeth. Your dentist can identify impaction through X-rays even before symptoms develop.
Types of Wisdom Tooth Impaction
- Soft tissue impaction: The tooth has emerged through the bone but remains partially or fully covered by gum tissue. This is the most common type and often leads to recurring gum infections (pericoronitis).
- Partial bony impaction: The tooth has partially emerged through the bone but is still blocked by surrounding bone. Part of the crown may be visible in the mouth.
- Full bony impaction: The tooth is completely encased in the jawbone and has not broken through at all. These may be discovered incidentally on dental X-rays.
- Angular impaction: The tooth is tilted toward the second molar (mesioangular), away from it (distoangular), or horizontally. Mesioangular impaction is the most common type.
Do All Wisdom Teeth Need to Be Removed?
No. Not every wisdom tooth requires extraction. If your wisdom teeth meet all of the following criteria, your dentist may recommend monitoring them rather than removing them.
You May Be Able to Keep Your Wisdom Teeth If
Even if your wisdom teeth come in without obvious problems, your dentist should continue monitoring them with periodic X-rays. Conditions can change over time, and problems may develop years after eruption.
- They have fully erupted into a normal position
- They are aligned properly with your bite
- They are not causing pain, infection, or damage to adjacent teeth
- You can reach them with a toothbrush and floss to keep them clean
- There is no cyst or pathology visible on X-rays
Removal Is Typically Recommended When
- The teeth are impacted (partially or fully trapped in bone or gum tissue)
- There is not enough room for them to erupt without crowding other teeth
- They are causing recurrent infections (pericoronitis) in the surrounding gum tissue
- A cyst or tumor is developing around an unerupted tooth
- They are causing decay or damage to the neighboring second molar
- They have erupted at an angle that makes them impossible to clean properly
How Wisdom Teeth Are Evaluated
Your dentist or oral surgeon evaluates wisdom teeth through a combination of clinical examination and imaging. A panoramic X-ray (OPG) shows all four wisdom teeth, their position relative to the jawbone, and their proximity to important structures like the inferior alveolar nerve.
In some cases, particularly when the roots appear close to the nerve canal, a CBCT (3D cone-beam CT) scan provides a more detailed view. This helps the surgeon plan the safest extraction approach.
Most dentists begin monitoring wisdom teeth with X-rays during the mid-teen years. Early evaluation allows for planned removal at an age when recovery is typically faster and complications are less common.
What to Expect If Your Wisdom Teeth Come In Normally
If your wisdom teeth erupt fully and align well, the eruption process is similar to any other tooth coming in. You may experience several weeks of intermittent soreness and gum tenderness as each tooth breaks through the tissue. Warm saltwater rinses and over-the-counter pain relief can help manage discomfort.
Once fully erupted, wisdom teeth function like any other molar. The main challenge is keeping them clean, as they sit at the very back of the mouth where toothbrush access is limited. Pay extra attention to brushing and flossing around these teeth to prevent cavities and gum problems.
Your dentist should continue to check your wisdom teeth at regular visits. Even healthy wisdom teeth can develop cavities, gum recession, or other issues over time due to their hard-to-reach location.
When to See an Oral Surgeon
A general dentist can evaluate your wisdom teeth and remove straightforward cases. However, an [oral surgeon](/specialties/oral-surgery) (oral and maxillofacial surgeon) has 4 to 6 years of additional surgical training beyond dental school and is the specialist for complex wisdom tooth cases.
Consider seeing an oral surgeon if your wisdom teeth are fully impacted in bone, if the roots are close to the nerve, if you want sedation or general anesthesia for the procedure, or if you need all four teeth removed at once.
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