What Are Periapical Granulomas?
Inflammation occurring within the periodontal ligament, especially around the periapical areas of the tooth structure- is the condition termed in dental pathology as apical periodontitis or inflammation around the root structure of the tooth-supporting tissues. These lesions around the affected tooth root are called granulomas occurring in traumatized or severely cavitated teeth or even in teeth with failed root canals or endodontic treatment.
Periapical granulomas with periodontal inflammation would be either acute or chronic. This mainly would depend on the inflammatory factors causing the inflammation of the periodontal ligament or the supporting structure of the tooth such as the host immune response or resistance to bacterial and viral pathogens, the count and the virulence of the affecting microorganisms, the severity of the chemical, thermal or mechanical agents that would have irritated the tooth supporting tissue that is the periodontal ligament. In this article, let us understand in detail the clinical features, the management aspects, and also the sequel that is associated with periapical granulomas.
What Are the Classification, and Clinical Features of Periapical Granuloma?
While periapical granulomas around the tooth would be classified mainly as either acute or chronic, acute lesions are usually a result of short-term trauma or an inflammatory exudate that would build up within the periodontal ligament of the tooth that is within the confined space present in between the apex of the tooth and the underlying jaw bone or the alveolar bone in which the tooth is embedded. Even light percussion clinically by the dental surgeon or light pressure upon clinical examination would be sufficient enough to induce severe pain, which is a clinical characteristic of a patient suffering from sudden or rather acute onset periapical granuloma.
Radiologic changes are usually the widened periodontal ligament of the affected tooth with the lamina dura (thin layer of dense bone that lines the tooth socket (alveolus) and surrounds the root of the tooth on dental X-rays) around the tooth apex, at a lesser defined boundary. The time onset though very short for an acute periapical granuloma still cannot produce on the jaw bone, an irreversible detrimental effect such as bone resorption. However, when these acute periapical granulomas are left untreated due to a lack of dental awareness, ignorance of the patient’s clinical discomfort and pain, lack of visit to the dentist, or because of dental fear- irrespective of these causes that may lead to a lack of dental management on time, these acute lesions or granulomas around the tooth root can transform into chronic granulomas, where persistent irritation from the etiologic agents or periodontal inflammation that is persisting would transform subsequently into a chronic natured lesion.
In the case of chronic periapical periodontal inflammation or periodontitis also termed as chronic periapical granulomas of the tooth affected, the untreated lesions as explained earlier due to persistent inflammatory factors can lead to complications such as bone resorption of the jaw and instead replacement of the bone by the presence of granulation tissue. Many dental or maxillofacial surgeons commonly notice that when a tooth with an untreated periapical granuloma of long duration with severe clinical features needs to be extracted, the periapical granulomas would still be attached to the root apex of the affected tooth. This indicates the severity or the extent to which persistent irritation of the bacterial pathogens that inflame the supporting periodontal ligament of the tooth would tend to cause irreversible damage, thereby proving to be an extensive and continuing source of infection with many complications.
Though asymptomatic usually and presenting with dull or throbbing tooth pain on percussion clinically by the dentist, chronic periapical granulomas are associated with more complications than acute lesions.
What Are the Complications or Sequale Associated With Periapical Granuloma Lesions?
Amongst the complications related to untreated chronic periapical granulomas are mainly the detrimental sequelae listed as follows by dental researchers:
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Alteration within the immunologic response of the host where the normal or microbial flora in the tooth root canal would be replaced by bacterial pathogens.
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Even amongst the chronic granulomas, acute exacerbation or severe dental pain that radiates and is accompanied by a sudden abscess formation, pus accumulation, and suppuration are undesirable and detrimental sequelae that tend to occur in severe lesions.
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The tooth mobility because of the inflamed periodontal ligament and the enlarging granuloma lesion around the root apex is indeed common in a number of untreated patients.
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When the epithelial cells of Malassez (remnants of the epithelial root sheath of Hertwig, which plays a role in the formation of the roots of teeth during development) are associated with this inflammation, the development of radicular cysts (the cysts that are formed around the root of the tooth) around the tooth can easily occur.
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Osteosclerosis (a condition characterized by the abnormal hardening or increased density of bone) or bone apposition rather than tooth-bound bone resorption of the underlying jaw, would be another major sequelae associated with chronic periapical granulomas. This is because a persistent low-grade irritation would lead to the infiltrate or the inflammatory exudate around the apical tissues causing bone apposition.
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Low grade chronic irritation to the periapical regions of the tooth would also over time result in the cementum tissue of the tooth root being deposited on the surface in excess- a condition known as hypercementosis.
As the virulence and the pathogens implicated in causing periapical granulomas need to be analyzed by the dental or the maxillofacial surgeon, it is hence important that radiologic observations such as the extent of the lesion, and the spread of the lesion matter to the management plan. Further along with antibiotic prophylaxis that is indicated by your dentist for eliminating the anaerobic pathogens causing the granuloma, endodontic treatment is the preferred method of choice if the tooth can be saved or deemed good for prognosis and rehabilitation. If the tooth in question is mobile or has a poor prognosis for endodontic treatment, then tooth extraction along with curettage of the granuloma and complete elimination is the method of choice.
Conclusion
It is important to note that the periapical granuloma of the tooth surrounding the periodontium, especially of a chronic nature often may be ignored by patients because of the experience of only dull or occasionally throbbing tooth pain in carious teeth. However, these are associated, as you can see with some detrimental tooth and jaw bound sequale that is progressive, that should be managed on time through endodontic treatment or surgical extraction. Untreated dental infections can hence, impact not only the oral but also the general quality of your life and vis a vis.
