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Dental Health7 April 20267 min read
Impacted Tooth Pain: Why Your Wisdom Teeth or Canines Are Causing Jaw Grief
A persistent ache deep in the jaw, tenderness at the back of the mouth, or unexplained pressure in the upper teeth – these are symptoms that many patients experience without initially understanding the cause. In a significant number of cases, the source is an impacted tooth: one that has not erupted fully into its expected position.
Wisdom teeth and canines are the teeth most commonly affected by impaction, and the discomfort they produce can range from a dull background ache to more noticeable pain that affects eating, concentration, and daily comfort. Understanding why impaction occurs, what symptoms to look for, and how the condition is managed can help you make informed decisions about seeking care.
Impacted teeth occur when a tooth does not fully emerge into its normal position, often due to lack of space or obstruction. This can lead to pressure, inflammation, or irritation of surrounding tissues, which may cause discomfort in the jaw. A clinical assessment is required to determine the cause and appropriate management.
Key Reasons:
An impacted tooth is one that has failed to erupt – or has only partially erupted – into its normal position in the dental arch. The tooth may be completely buried within the jawbone, partially covered by gum tissue, or tilted at an angle that prevents it from emerging fully.
Full impaction means the tooth remains entirely beneath the gum and bone, often detected only through X-rays during routine dental visits. Partial impaction occurs when part of the tooth has broken through the gum but cannot complete its eruption, leaving a flap of tissue that can trap food and bacteria.
The teeth most commonly affected are the wisdom teeth (third molars), which typically attempt to emerge in the late teens or early twenties, and the upper canines, which may become impacted if their eruption pathway is blocked or if the jaw lacks sufficient space.
Several factors can contribute to tooth impaction:
Lack of space in the jaw: Modern human jaws are often smaller than those of our ancestors, and there may simply not be enough room for all teeth to erupt comfortably – particularly the wisdom teeth at the back of the arch.
Misalignment or crowding: When existing teeth are crowded or positioned irregularly, they can obstruct the path of an erupting tooth, preventing it from reaching its intended position.
Developmental factors: The angle at which a tooth develops within the bone, or the timing of its formation relative to surrounding structures, can influence whether it erupts normally or becomes impacted.
Obstruction by other teeth: A tooth may be blocked by an adjacent tooth that has already erupted or by abnormal tissue such as a cyst, although the latter is uncommon.
The pain associated with an impacted tooth can develop gradually or appear more suddenly, and the mechanism varies:
Pressure within the jaw: As an impacted tooth attempts to erupt against resistance, it can generate pressure on surrounding bone and adjacent teeth, producing a deep, aching discomfort that may be difficult to localise precisely.
Irritation of surrounding tissues: A partially erupted tooth can irritate the overlying gum tissue, causing tenderness, swelling, and discomfort – particularly when eating or when the area is touched.
Possible infection or inflammation: The gum flap over a partially erupted tooth can trap food debris and bacteria, leading to a localised infection known as pericoronitis. This can cause significant pain, swelling, and difficulty opening the mouth.
Effects on nearby teeth: In some cases, an impacted tooth may press against the roots of neighbouring teeth, potentially contributing to discomfort, sensitivity, or changes in alignment over time.
Impacted wisdom teeth are the most common form of tooth impaction, and symptoms may include:
Symptoms may come and go over time, often flaring during periods of partial eruption before settling again.
Impacted canines – most commonly the upper canines – may present differently from wisdom teeth:
Delayed eruption: The most noticeable sign may be the absence of a canine tooth in the dental arch, with the baby tooth still in place beyond the expected age of replacement.
Pressure in the upper jaw: Some patients experience a sense of pressure or fullness high in the gum, sometimes extending towards the nose or eye socket.
Changes in tooth alignment: An impacted canine may gradually push against neighbouring teeth, causing subtle shifts in position that become noticeable over time.
Impacted canine symptoms are often less dramatic than those of wisdom teeth and may be identified during routine dental examinations rather than through pain alone.
While some impacted teeth cause no symptoms at all, certain signs suggest that professional evaluation would be beneficial:
If symptoms are severe or include significant swelling, fever, or difficulty swallowing, more prompt attention may be appropriate. Learn more about Emergency Dentists in City of London.
The management of an impacted tooth depends on the specific tooth involved, the nature of the impaction, and the symptoms:
Monitoring and observation: Not all impacted teeth require treatment. If a tooth is fully impacted, asymptomatic, and not affecting neighbouring structures, your dentist may recommend periodic monitoring with imaging to ensure the situation remains stable.
Surgical removal: For impacted wisdom teeth causing recurrent symptoms, infection, or damage to adjacent teeth, surgical extraction may be considered. The procedure is carried out under local anaesthesia, with sedation available for patients who would benefit from it.
Orthodontic exposure: For impacted canines, a combined surgical and orthodontic approach may be used. The impacted tooth is surgically exposed and a bracket is bonded to it, allowing orthodontic treatment to guide the tooth gradually into its correct position. Learn more about Invisible Braces in City of London.
Personalised treatment planning: Every case is assessed individually, taking into account the patient’s symptoms, the position of the impacted tooth, and the overall dental picture. Your dental team will explain the options and help you understand the expected process.
The cost of managing an impacted tooth varies depending on the complexity of the case. Monitoring an asymptomatic impaction involves different costs from surgical removal or a combined orthodontic exposure and alignment programme. Factors such as the position of the tooth, the type of anaesthesia or sedation required, and the duration of any orthodontic treatment all influence the overall investment.
Your dental team can provide a clear outline of the anticipated costs following a clinical examination and any necessary imaging.
Treatment suitability and costs are determined following a personalised clinical assessment.
While impaction itself cannot always be prevented, early identification and appropriate management can help reduce the risk of complications:
If you are experiencing jaw discomfort, unexplained pressure, or suspect that a tooth may not have erupted as expected, a professional evaluation can provide clarity. Your dental team can assess the area using clinical examination and imaging, explain what is happening, and discuss the most appropriate options for your situation.
Whether the impaction requires active treatment or simply careful monitoring, understanding the cause of your symptoms is the first step towards effective management and peace of mind.
Symptoms that may suggest an impacted tooth include persistent jaw pain, swelling or tenderness in the gum behind your back teeth, difficulty opening your mouth, or the absence of an expected permanent tooth. However, many impacted teeth are asymptomatic and are identified through dental X-rays taken during routine check-ups. A clinical assessment and imaging are needed to confirm whether a tooth is impacted.
No, not all impacted teeth cause pain. Some remain completely buried within the jawbone without producing any symptoms and are discovered incidentally during routine dental imaging. Whether an impacted tooth causes discomfort depends on factors such as its position, whether it is pressing on adjacent structures, and whether there is associated inflammation or infection.
In some cases, an impacted tooth may exert pressure on neighbouring teeth, potentially contributing to discomfort, root damage, or gradual changes in alignment. This is one of the reasons why impacted teeth are monitored, even when they are not currently causing symptoms. Regular imaging allows your dentist to assess whether the impacted tooth is affecting surrounding structures over time.
Not always. Removal is typically considered when an impacted wisdom tooth is causing recurrent pain, infection, damage to adjacent teeth, or other complications. If the tooth is fully impacted, symptom-free, and not affecting neighbouring structures, monitoring may be the preferred approach. The decision is made on an individual basis following a thorough clinical and radiographic assessment.
In many cases, yes. A combined surgical and orthodontic approach can be used to expose the impacted canine and gradually guide it into its correct position in the dental arch. This avoids the need for extraction and preserves the natural tooth, which plays an important role in both function and aesthetics. The suitability of this approach depends on the position of the tooth and individual clinical factors.
This article is for general informational purposes only and does not constitute dental or medical advice. Every patient’s situation is unique, and treatment recommendations should be made by a qualified dental professional following a thorough clinical assessment. If you are experiencing dental symptoms, please contact a dental professional for personalised guidance.