Key Takeaways
- Wisdom teeth are susceptible to decay due to their late emergence and hard-to-reach location – at the back of the mouth.
- Early indicators of wisdom tooth decay include sensitivity, irritation, pain in the gums or jaw, discolouration, and more.
- Treatment approaches vary based on decay severity, ranging from fillings to extraction. Dental fillings can save mildly decayed wisdom teeth, while wisdom teeth surgery (surgical removal) is an option for severe cases.
- Preventive measures like brushing, flossing, and regular check-ups can help prevent wisdom tooth decay issues.
Wisdom teeth, or third molars, are widely known for causing trouble in our mouths. But have you ever wondered why these specific teeth are more prone to decay and complications? In this comprehensive guide, we will delve into the causes, treatment options, and prevention strategies for wisdom tooth decay. Let’s dive in and uncover the secrets surrounding these problematic teeth.
What is Wisdom Tooth Decay?
Wisdom tooth decay is a dental condition characterised by the deterioration or damage of wisdom teeth due to bacteria, acids, and other harmful substances in the mouth. It is the same as regular tooth decay, where the tooth’s protective enamel is eroded by acids produced by bacteria, leading to cavities or holes in the surface of the tooth.
Wisdom teeth’ location and positioning can make them more susceptible to decay as they are located at the back of your mouth (upper wisdom tooth and lower wisdom tooth).
Wisdom tooth decay can look like what’s in the photo.
Causes: Why are Wisdom Teeth Prone to Decay?
Wisdom teeth are the last adult teeth to emerge, typically between the ages of 17 and 21. Their late arrival makes them susceptible to decay and other dental problems, including a wisdom tooth cavity.
They are prone to decay for several reasons. Here are the main causes:
Hard to Reach Location
Poor Oral Hygiene
One of the primary causes of wisdom tooth decay is poor oral hygiene. As previously mentioned, wisdom teeth can be challenging to clean properly due to their location at the back of the mouth. Inadequate oral hygiene practices, like infrequent brushing and flossing, can contribute to the decay of wisdom teeth. Neglecting proper oral care allows bacteria to thrive and increases the likelihood of cavities.
Late Emergence and Impacted Teeth
The late emergence of wisdom teeth can contribute to them becoming impacted, meaning they do not have enough room to erupt properly or may not always emerge fully or in the correct position. Impacted wisdom teeth can create pockets that are difficult to clean. This creates a conducive environment for bacteria, resulting in cavities and other dental issues. In such cases, extraction of the impacted wisdom teeth is recommended.
Overcrowding
Wisdom teeth can also cause crowded teeth in the mouth. This can make it difficult to properly clean the surrounding teeth, leading to an increased risk of decay for both the wisdom teeth and neighbouring teeth.
Dietary Habits
Consuming a diet rich in sugary foods and drinks significantly contributes to tooth decay. Sugars and carbohydrates feed the harmful bacteria in the mouth, which then produce acids that erode tooth enamel. Wisdom teeth might be particularly vulnerable to this acid attack due to their location.
Dry Mouth
Another factor that can contribute to wisdom tooth decay is dry mouth, which is caused by a lack of saliva. Substances found in the saliva also help counter the acid produced by bacteria that helps prevent decay by washing away food particles and plaque from your teeth.
Existing Dental Work on Adjacent Teeth
Existing dental work on nearby teeth, such as fillings, crowns, or bridges, can also contribute to the risk of decay around wisdom teeth. These restorations may create areas where plaque and food particles are more likely to accumulate, especially in the back of the mouth where cleaning is already more difficult. Over time, this can increase bacterial activity and affect both the wisdom tooth and the adjacent restored tooth. Maintaining good oral hygiene and monitoring these areas regularly can help reduce the risk of complications.
How Does a Dentist Diagnose Wisdom Tooth Decay?
Diagnosing wisdom tooth decay involves a combination of clinical assessment and imaging. Because wisdom teeth are located at the back of the mouth and may not always be fully visible, dentists use both visual checks and X-rays to accurately evaluate their condition and detect early signs of decay.
Clinical Examination
During a routine dental check-up, the dentist will visually examine the wisdom teeth and surrounding gums for signs of decay, such as dark spots, cavities, swelling, or redness. A dental instrument may also be used to gently probe the tooth surfaces to check for soft areas that could indicate enamel breakdown. The dentist will also assess how easily the area can be cleaned and look for signs of food or plaque accumulation around partially erupted wisdom teeth.
Dental X-rays
Dental X-rays play an important role in diagnosing wisdom tooth decay, especially when it is not visible during a clinical examination. X-rays can reveal decay between teeth, beneath the gum line, or under existing dental work. They also help assess the position of impacted wisdom teeth and identify any hidden issues affecting adjacent teeth or bone. This allows for a more accurate diagnosis and helps guide appropriate treatment planning.
Signs & Symptoms of Decayed Wisdom Tooth
Identifying wisdom tooth decay early is crucial for seeking timely dental treatment. The initial indications of wisdom tooth decay vary from person to person, and these include the following:
Persistent, throbbing pain around the back of the mouth
Ongoing or pulsing pain in the back of the mouth may indicate that decay has reached deeper layers of the tooth. This can sometimes worsen when biting or at night.
Sensitivity to hot, cold, or sweet foods
Increased sensitivity may occur when the enamel is weakened, allowing stimuli to reach the inner parts of the tooth. This can feel like a sharp or lingering discomfort.
Difficulty opening the mouth
Trouble opening the mouth fully may be linked to inflammation or infection around the wisdom tooth. This can also be associated with discomfort in the surrounding muscles.
Presence of white spots on teeth
White spots can be an early sign of enamel demineralisation, which may develop into cavities if not managed. These changes are often subtle and easy to overlook.
Dark spots or visible holes on the wisdom tooth’s surface
Dark areas or visible cavities usually indicate more advanced decay where the tooth structure has already been damaged. These may trap food and bacteria, worsening the condition.
Bad breath or unpleasant taste in the mouth that does not improve with oral hygiene
Persistent bad breath or taste can be caused by bacteria accumulating around a decayed or partially erupted wisdom tooth. This may continue even with regular brushing.
Inflammation and swollen gums surrounding the wisdom tooth
Swelling or redness around the wisdom tooth may suggest irritation, infection, or difficulty keeping the area clean. The gums may also feel tender or bleed easily.
Upper or lower jaw pain
It’s crucial to pay attention to these early signs, as addressing wisdom tooth decay in its initial stages can help prevent it from progressing and potentially more challenging to treat conditions.
Now, let’s get to know the effective treatments for decayed wisdom teeth.
Wisdom Tooth Decay vs Pericoronitis: What is the Difference?
Both wisdom tooth decay and pericoronitis can cause pain, swelling, and discomfort at the back of the mouth, which is why they are often confused. However, the underlying cause is different. Wisdom tooth decay occurs when bacteria break down the tooth structure due to plaque buildup, especially in areas that are difficult to clean. In contrast, pericoronitis is an infection of the gum tissue surrounding a partially erupted wisdom tooth, often caused by trapped food particles and bacteria beneath the gum flap.
Because the causes differ, the treatment approach also varies. Tooth decay is typically managed by removing the decayed portion of the tooth and restoring it, or extracting the tooth if the damage is extensive. Pericoronitis, on the other hand, focuses on controlling the infection through cleaning, medication, and sometimes removal of the affected wisdom tooth if the condition recurs. If you are unsure which condition you may have, you can learn more in our detailed guide on pericoronitis to better understand its symptoms and management.
Treatment Options for Wisdom Tooth Decay
When it comes to treating wisdom tooth decay, there are different approaches based on the severity of the decay. It will vary depending on whether the tooth is mildly decayed or severely decayed. Let’s explore these professional treatment options in detail.
For wisdom teeth with mild decay, several treatment options include:
DENTAL FILLINGS
Dental Fillings are a treatment option for wisdom teeth with mild decay, where the decayed portion of tooth tissue is removed, and the area is filled with restorative materials. Fillings can fill the cavity and prevent further decay, potentially saving the wisdom tooth and avoiding the need for extraction.
It’s important to note that dental fillings are not always a suitable option for wisdom teeth. In cases where the tooth is severely decayed or the tooth’s position is problematic, wisdom teeth removal may be the preferred course of action, which will be discussed in the following sections.
FLUORIDE TREATMENT
Fluoride treatments may be recommended in some cases. Fluoride can aid in the remineralisation of tooth enamel and the prevention of early decay.
In cases of severe wisdom tooth decay, these treatments are required:
- Root Canal Treatment
- Wisdom Tooth Extraction
ROOT CANAL TREATMENT
If the decay reaches the tooth’s pulp, where the nerves and blood vessels are located, a root canal might be needed. The infected pulp is removed, and the tooth is sealed and capped with a crown; dental crowns might be used if a significant portion of the tooth is decayed, as well as to protect the remaining structure of your tooth. A crown covers the entire visible portion of the tooth, restoring its shape, size, and strength.
WISDOM TOOTH EXTRACTION
In cases where the wisdom tooth is severely decayed or extensive, and your tooth cannot be salvaged, extraction is often the recommended option. Once the tooth is removed, patients looking to restore their smile can explore affordable dental implants as a long-term replacement solution. Wisdom tooth removal is a surgical procedure performed by a dentist under local anaesthesia or nitrous oxide. The process involves removing the entire tooth from its socket.
The decision to have wisdom teeth removed prevents further complications and protects overall oral health. Extracting decayed wisdom teeth early on provides several benefits:
- Easier and less complicated removal;
- Reduce the risk of post-operative complications;
- Promote a faster recovery process;
- Prevent further damage to surrounding teeth;
- Prevent infection and inflammation;
- Prevent cysts and tumours;
- Reduce chronic headaches; and
- Help maintain good oral health.
Regardless of the severity of the decay, timely action is vital. If you suspect wisdom tooth decay, seek dental care promptly. Your dentist will evaluate the condition and recommend a suitable treatment based on the level of decay, tooth position, and overall oral health.
A simple extraction may take around 20 to 40 minutes if the tooth is fully erupted and easily accessible. However, if the tooth is impacted or significantly damaged, a surgical extraction may be required, which involves making a small incision in the gum and, in some cases, sectioning the tooth for removal. This type of procedure can take longer depending on the position and condition of the tooth.
Complications of Untreated Wisdom Tooth Decay
Untreated wisdom tooth decay can lead to a range of serious complications. As decay progresses, it can result in infections that affect not only the tooth but also the surrounding gums, bone, and nearby teeth. In more advanced cases, delayed treatment may require more extensive procedures such as surgical wisdom tooth removal.
Swift action is essential to prevent these complications from worsening and to protect both your oral and overall health.
| Complication | What Happens | Why It Matters |
|---|---|---|
| Abscess Formation | Bacterial infection spreads into surrounding tissue, forming a pus-filled pocket. | Leads to severe pain, swelling, bad taste, and possible fever if infection worsens. |
| Spread of Infection to Adjacent Teeth | Decay can extend to the nearby second molar through direct contact or trapped bacteria. | Puts a healthy tooth at risk, even with good oral hygiene, increasing treatment complexity. |
| Cyst Development | A fluid-filled sac may form around a decayed or impacted wisdom tooth root. | Can damage the jawbone and nearby teeth if left untreated, sometimes requiring surgical removal. |
| Impact on Overall Health | Severe infections may spread beyond the mouth to the jaw, neck, or bloodstream. | Highlights the importance of early treatment, as complications can extend beyond dental discomfort. |
Post-Extraction Recovery
The recovery process following wisdom tooth removal typically takes approximately two weeks, although most patients can return to their usual activities after three to four days. In cases of impacted teeth, the recovery process may be longer.
To ensure a prompt recovery, it is crucial to adhere to the instructions given by your dentist.
Tips for Preventing Wisdom Tooth Decay
Bottom Line
Wisdom tooth decay may be a common issue, but it does not have to be bound to happen. By understanding the unique challenges that make your wisdom teeth susceptible to decay, identifying the early signs of decay, and seeking prompt treatment, you can protect your oral health and preserve a winning smile! Keep in mind that treatment and prevention are the perfect tools, so don’t underestimate the power of these approaches to keep your wisdom teeth—and your entire mouth—healthy.
Frequently Asked Questions
What happens if wisdom teeth decay?
If wisdom teeth decay, it can lead to the formation of cavities or holes on their surfaces. This decay can cause gum infection and disease, and tooth loss if left untreated. Taking timely action is essential for maintaining good oral health.
Should decayed wisdom teeth be removed?
Decayed wisdom teeth should be removed as soon as possible due to the risk of pain and swollen infection. They can also lead to the deterioration of nearby healthy teeth, resulting in toothaches and other complications.
Can a decay in a wisdom tooth be filled, or does it have to be pulled?
It will depend on the severity of the decay in your wisdom tooth and the state of your wisdom tooth condition. Your dentist may decide on the right treatment based on assessment and further evaluation.
Is wisdom tooth decay painful?
Not always, particularly in the early stages. Decay can develop without noticeable pain until it reaches the inner layers of the tooth. This is why regular dental check-ups are important for wisdom teeth, as decay may be progressing silently before symptoms appear. When pain does develop, it typically presents as a persistent ache, sensitivity to hot or cold, or sharp pain when biting down.
How quickly can wisdom tooth decay progress?
Wisdom tooth decay can begin within weeks of plaque accumulation, with early enamel breakdown progressing to a visible cavity within one to three months if left unaddressed. Because wisdom teeth are harder to reach and clean, decay tends to advance more rapidly than in other teeth, potentially reaching the dental pulp within six to twelve months. Regular dental check-ups are the most reliable way to catch decay early, before it progresses to a stage that requires more extensive treatment.
What does a decayed wisdom tooth look like?
Early decay may appear as white or chalky spots on the tooth surface, indicating demineralisation of the enamel. As decay progresses, these areas may darken to brown or black, and visible holes or pits may form on the surface. In some cases, the decay is not visible to the naked eye and can only be detected through dental X-rays, particularly when it develops between teeth or beneath the gum line.
