Abstract:

Radicular cysts are inflammatory jaw cysts at the apices of teeth with infected and necrotic pulps. Radicular cyst treatment is mainly based on root canal treatment and if necessary surgical excision of the cyst lining with apicoectomy with retrograde filling. The lateral periodontal cyst (LPC) is an uncommon developmental odontogenic cyst. The LPC appears as a well circumscribed round or ovoid radiolucent area, usually with a sclerotic margin on the lateral aspect of a root. The vitality of adjacent teeth plays an important role in the differential diagnosis. Although radiographic examination is an important resource in clinical diagnosis; misdiagnosis may lead to extraction of teeth, unnecessary periodontal treatment and recurrence of the injury due to inadequate radiological examination. In this present case, surgical endodontic therapy of a radicular cyst mimicking lateral periodontal cyst with external root resorption related to previous unsuccessful root canal treatment and large diameters of the lesion by a Erbium, Cronium: Yittrium: Scandium, Gallium and Garnet Er,Cr:YSGG laser and mineral trioxiside aggregate (MTA) is presented.   Radicular cysts are inflammatory chest cysts formed in the apexes of infected and necrotic pulpular teeth. In the treatment of radical cysts primarily the related tooth canal treatment is applied, if necessary, with apixectomy and retrograde filling, the cysts are performed with surgical excision. Lateral periodontal cyst (LPK) is a developmental odontogenic cyst that is not widely seen. On the lateral surface of the root, the LPK, which gives a sclerotic edge, well-limited round or oval radiolusent image, is usually detected by routine radiographic examination. In the distinctive diagnosis of LPK, it is important that the related tooth is vital. Radiological examination is an important source in clinical diagnosis, but due to insufficient radiological examination, incorrect diagnosis can cause tooth traction, unnecessary periodontal treatment and recurrence of injury. This fact report is formed by the cause of previously failed root channel treatment; the lateral periodontal cyst appearance of broad periradicular damage and external root resorption of the Erbium, Chromium: Yittriyum-Scandiyum-Galyum-Garnet (Er,Cr:YSGG) laser and mineral trioxide aggregate (MTA) is presented in the surgical endodontic treatment. Keywords: Lateral periodonatal cyst, radical cyst, external root resorption, Er,Cr:YSGG laser, MTA.

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