Buccal bifurcation cyst

In regard to the epidemiology of Buccal Bifurcation Cyst, the prevalence of Buccal Bifurcation Cyst has been roughly measured in fewer than 1% of all odontogenic cysts. To the best of our knowledge, no maxillary BBC instances have been documented in the English literature, indicating how rare maxillary occurrence is. Ruddocks et al. conducted an analysis around 2022 and found that 32 studies published since 1970 reported 82 BBCs, all of which were found in the mandible. A rare inflammatory odontogenic cyst that typically affects children in their first ten years of life is called a buccal bifurcation cyst (BBC). Most situations are unilateral, however up to 30% of all BBCs may be bilateral, which can be confusing for new practitioners. == Etiology ==

The exact etiology of BBC is still unclear, but several theories have been suggested regarding its formation. One hypothesis suggests that inflammation arises when the tooth penetrates through the oral mucosa during eruption, leading to the proliferation of epithelial cells and cyst formation. Another theory proposes that a tilted mesiobuccal cusp and deep periodontal pockets might lead to inflammation. Additionally, enamel projections from the cemento-enamel junction, in the cervical region of tooth, extending into the furcation, along with reduced enamel epithelium, may make teeth more prone to buccal pocket formation, which can subsequently expand due to pericoronitis and ultimately lead to cyst formation. == Pathophysiology ==

A buccal bifurcation cyst (BBC) is a rare type of cyst that originates from the tissues involved in tooth development (odontogenic cyst). It typically forms on the buccal aspect (cheek side) of mandibular molars, particularly affecting children between the ages of 5 and 13. This condition is unique because it is linked to the eruption of molars, but the exact process behind its development is still not completely understood. Since the developing molar is positioned close to the buccal gingiva, food and bacteria can easily get trapped in the gum tissue around the tooth, leading to inflammation. These signals attract immune cells to the area, which break down the bone near the cyst through osteoclastic activity (bone resorption). This leads to the characteristic bone destruction, particularly in the buccal cortical plate of the mandible. Despite this, the roots of the affected tooth are usually not damaged, which helps differentiate BBCs from other types of cysts. Once a BBC forms, it grows due to hydrostatic pressure within the cyst. The epithelium lining the cyst produces fluid, causing the cyst to expand and further resorb the surrounding bone. Fortunately, BBCs tend to grow slowly and usually do not cause severe symptoms, aside from noticeable buccal swelling. Because of this, these cysts are typically not aggressive and don’t destroy the surrounding tissues. In conclusion, the development of buccal bifurcation cysts is closely related to inflammation during molar eruption, with epithelial proliferation leading to cyst formation. The cyst grows through a combination of inflammatory and developmental processes. Although we don’t fully understand the pathogenesis of BBC, it involves a mixture of inflammation, mechanical forces, and environmental factors. The prognosis is excellent with proper treatment, as BBCs are generally non-aggressive and respond well to surgery. == Clinical features ==

Buccal bifurcation cysts (BBC) occur in children between the ages of 4 and 14 years, and they usually appear during the first decade of life as a pediatric lesion. Most BBC affects the vital first or second permanent mandibular molars (buccal aspect), which are occasionally present bilaterally. The symptoms typically emerge around the time of the molar erupts, with the patient experiencing mild tenderness and discomfort on the buccal side of the tooth. Swelling is commonly observed, and the patient often reports a foul-tasting discharge. BBC is often asymptomatic; however, infection with pus drainage and pain can also be present. == Radiographic features ==

Panoramic(figure 1) and apical(figure 2) radiographs are commonly utilised in routine examinations to aid in the initial detection of BBC. With the presence of periosteal reaction on the buccal aspect of the tooth. Tilting of the affected molars, with the apices of the roots tilted lingually and cusp tip buccally. Unlike a periapical cyst, the periodontal ligament space and lamina dura remain intact and continuous, suggesting that the lesion is not directly associated with the root apices. == Investigations and diagnosis ==

As for the investigations, clinical and radiographic examinations are typically done. Clinically, the cyst often presents in children or teenagers with swelling on the buccal aspect of the mandibular molars, along with mild pain or infection. Dentigerous cysts are more frequently found in the mandibular third molars of adults and are classified as developmental cysts that form around the crown of an unerupted tooth. However, it is specifically associated with a non-vital tooth, and a pulp vitality test can help rule out this possibility. A proper diagnosis requires a holistic amalgamation of clinical examination, imaging, and sometimes histopathological analysis. ==Treatment and management==

Although the treatment of the cyst was previously enucleation of the cyst with removal of the involved tooth or enucleation with root-canal treatment, the current management is enucleation with the preservation of the involved tooth. However, recent evidence suggests self-resolution of this type of cyst, thus close observation with meticulous oral hygiene measures can be employed unless the cyst is infected and symptomatic. Although uncommon, a BBC is a distinct condition that should be carefully considered as a differential diagnosis for a cystic lesion affecting a vital first or second mandibular molar in children and adolescents. Over time, the treatment of BBC has evolved. It was stated that curettage of the cyst and tooth extraction were successful treatments. The marsupialization(figure 3) procedure has been successful in situations where enucleation could jeopardize the health of nearby teeth or cause harm to other nearby tissues such as nasal cavities, paranasal sinuses, and neurovascular bundles. It is recommended that the surgical exposure be large enough to provide proper clinical assessment of the cystic lining because marsupialization by design implies that a sizable amount of the cystic lesion will be retained by the jaws. Following cyst enucleation and curettage, bone grafting was also carried out in three cases either as a primary or secondary adjunct to support the treatment approach. Only routine cleaning was needed thereafter, and the cyst fully resolved within two years. These non-invasive treatments may be particularly beneficial for children with dental anxiety, poor compliance, or medical conditions that necessitate avoiding surgery. Regular follow-up is also recommended to promote proper healing, maintain tooth vitality, and monitor the contralateral tooth for potential cyst development. == References ==