**1. Introduction**

[20] Zuolo ML, Ferreira MOF, Gutmann JL: Prognosis in periradicular surgery: a clinical

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prospective study, lnl Enc1ad J 33:9 1, 2000

234 A Textbook of Advanced Oral and Maxillofacial Surgery Volume 2

during peri radicular surgery, lilt Endod) 32:225, 1999.

Cysts of the maxillary sinus are detected primarily as incidental findings on radiographs. These cysts often appear as rounded, dome-shaped, soft tissue masses, which are usually located on the floor of the maxillary sinus. Ectopic teeth in the maxillary sinus are readily diagnosed radiographically because they are radiopaque. Water's view, panoramic radiography and plain skull radiography are simple and inexpensive methods that can be used in daily practice. The shape and extent of the cysts can vary widely, and the position of ectopic teeth may be found very close to the eye; in such situations, conventional radiographs may not be sufficient for determining their dimensions or relationship with anatomical structures. Thus, computed tomography (CT) should be used, and patient observation should be initiated using a multi‐ disciplinary team that includes specialists from radiology, dentistry, and surgery departments.

Multidisciplinary treatment planning is an important key component in the long-term success and quality of treatment. In some cases, endodontic treatment should be performed by a dentist or endodontist before the operation, and the vitality of the teeth should be observed closely after the operation. Generally, treatment includes enucleation of the cyst and/or surgical excision, including endoscopic observation in some cases. Long-term multidisciplinary postoperative patient observation should be performed, especially in cases with high recur‐ rence. The aim of this section is to shed new light on treatment approaches for cysts localized in the maxillary sinus.

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