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Functional endoscopic sinus surgery (FESS) is a set of minimally invasive surgical techniques that allow direct visual examination and opening of the sinuses for the treatment of chronic rhinosinusitis which has not responded to medical treatment. The use of FESS allows for a much less invasive and traumatic procedure, resulting in shorter surgery and healing times, less postoperative discomfort, and fewer surgical complications.

What is All-On-4? ---- Also know about allon4plus Four implants placed in a completely teeth-less jaw, providing secure and optimal support for a fixed bridge/denture. The posterior two implants are specially designed and angulated to achieve, the most Comprehensive, Successful, Safe, Simpler, Graft-less, Minimum-Number-Implant-Solution for completely missing teeth. Often, tooth loss is accompanied by loss of the jaw bone which poses the problem of reconstruction of the jaw bone. For the implantation to be successful, it is necessary to transplant bone from other parts of the body. It requires an additional surgery and many patients can not do the transplant of bone for general health reasons also (diabetes and others). The All-on-4 solution, will address these drawbacks because it consists in establishing a fully customized denture (bridge) based only on four titanium implants. These implants act as "pillars" to the bridge that supports the prosthetic teeth. The invented process allows taking advantage of existing bone, even if scarce, avoiding having to use bone grafts. The posterior implants are substantially angled at approximately 45 degrees to avoid compromising the sinus cavity in the upper jaw and the nerve canal in the lower jaw. The All-on-4 solution owes its name to the very nature of the method, which consists of applying a dental prosthesis with at least twelve teeth (bridge) fixed in the jaw, based only on four titanium implants. The specific implants or pillars used are protected by international patenting