The goal of this clinical trial is to compare surgical treatment outcomes of odontogenic keratocysts (OKC) treated with enucleation and local application of Carnoy's solution or 5% 5-fluorouracil. The main questions it aims to answer are:

1. What is the recurrence rate of OKC treated with enucleation and local application of 5% 5-fluorouracil cream in the period of three and five years after the treatment
2. What is the recurrence rate of OKC treated with enucleation and local application of Carnoy's solution in the period of three and five years after the treatment
3. Is there a difference in the recurrence rate between these two groups
4. What is the frequency of sensitivity disorders in the innervation zone of inferior alveolar and infraorbital nerves in both groups

Participants will be assigned to one of two groups after Histopathological verification (HP verification).They will be treated with enucleation and local application of Carnoy's solution or 5% 5-fluorouracil depending on group. After surgical treatment they will be monitored in accordance to standard treatment protocols for patients with OKC.

Inclusion Criteria:

• Histologically verified OKC of the upper or lower jaw;
• Indicated surgical treatment of OKC

Exclusion Criteria:

• Hypersensitivity to 5-fluorouracil and Carnoy's solution;
• Pathological fracture of the jaw in OKC region.
• Nevoid basal cell carcinoma