Navigation-Assisted Nasal Bone Osteotomy for Malunited Fracture

Area of Science:

• Otolaryngology
• Orthopedic Surgery
• Medical Technology

Background:

• Nasal bone osteotomy relies on subjective surgeon assessment, making it technically challenging and experience-dependent.
• Current methods for evaluating osteotomy and reduction positions are imprecise.

Purpose of the Study:

• To evaluate the efficacy of a navigation system for intraoperative assessment of osteotomy and reduction in malunited nasal bone fractures.
• To determine if navigation systems can enhance surgical accuracy and reduce reliance on surgeon experience.

Main Methods:

• Applied a navigation system (Stealth Station S7) with a specialized bone chisel (Suretrack) in 5 patients.
• Performed osteotomies while visualizing the chisel tip on a monitor.
• Evaluated reduction position using a needle syringe with the Suretrack attached.

Main Results:

• Navigation system allowed real-time visualization and confirmation of osteotomy position and direction.
• Clear visualization of the reduction position was achieved on the monitor.
• Demonstrated accurate 3D spatial relationship confirmation around the fracture site.

Conclusions:

• Navigation systems offer objective, real-time 3D assessment for nasal bone osteotomy.
• These systems simplify preoperative preparation and intraoperative execution without radiation.
• Navigation aids enhance accuracy, benefiting both experienced and inexperienced surgeons, including trainees.