Modern approaches to the orbital wall reconstruction with titanium nickelide implants in patients with nasal cavity and paranasal sinus cancer

Background. The majority of tumors of the nasal cavity and paranasal sinus are diagnosed at an advanced stage, requiring invasive and mutilating surgery, and therefore, the reconstruction of post-surgical craniofacial bone defects using various implants is necessary. Purpose of the study: to evaluate the effectiveness of the use of the thin-profile implants made of titanium nickelide in the surgical treatment of nasal cavity and paranasal sinus cancers. Material and Methods. From 2002 to 2020, a total of 60 patients with stage T3-4N0-1M0 nasal cavity and paranasal sinus cancer were treated at the Cancer Research institute (Tomsk). All patients received radiation therapy followed by surgery with reconstruction of bone structures of the subcranial region and orbital walls. in the study group (n=30), the orbital walls were restored with individual thin-profile shape memory titanium nickelide implants. in the control group (n=30), typical porous and tissue titanium nickelide implants were used. They required adjustment during surgery and complicated reparative processes in the postoperative period due to their thickness. Tissue implants did not allow accurate restoration of the orbital walls due to their structure. Results. Surgical rehabilitation with orbital wall reconstruction using thin-profile titanium nickelide implants makes it possible to shorten the duration of surgery and improve the precision of surgical repair. Features of the architectonics of implants do not interfere with the growth of tissues of the recipient zone, thus preventing the development of inflammation in the implantation site. The technique allows adequate restoration of the natural position and function of the eye.