Sinus lift procedure is a safe and predictable technique, but some complications such as a perforation of the Schneiderian membrane (SM) still occur. Therefore, the question how to treat such complication is quite a relevant one. MATERIAL AND METHODS. The analysis of the specialized literature in the electronic databases PubMed, Web of Science, Scopus on “Schneiderian membrane perforation”, “Schneiderian membrane” and “PRF” was done. RESULTS. Predisposing factors for sinus lift perforation are discussed and the way of its treatment is represented. CONCLUSION. There are factors predisposing to Schneiderian membrane perforation that we cannot influence and have to deal with. L-PRF membrane can be used to close sinus membrane perforations with quite a predictable result alone. L-PRF membrane can be used to reinforce the sealing obtained by the collagen membrane. Xenograft can be used with i-PRF/AFG to make the whole graft more stable and easier to handle. I-PRF/AFG can be utilized to seal micro perforations that can be left unnoticed otherwise. Key words: Schneiderian membrane perforation, sinus-lift, sticky-bone, PRF