Application of Taguchi method in optimization of cervical ring cage

Area of Science:

• Biomechanical Engineering
• Statistical Design of Experiments

Background:

• Factorial and fractional factorial experiments have limitations in complexity and standardization.
• Cervical ring cages are used in spinal fusion, with subsidence being a risk.
• Optimizing implant design is crucial for reducing surgical complications.

Purpose of the Study:

• To demonstrate the Taguchi method's application and benefits in biomechanical analysis.
• To optimize a cervical ring cage design using the Taguchi method.
• To identify key design factors influencing stress on the endplate.

Main Methods:

• A three-dimensional finite element model of C(5)-C(6) with a cervical ring cage was developed.
• The Taguchi method was employed to optimize cage material properties and dimensions.
• An objective function was established to minimize endplate von Mises stress.

Main Results:

• Increased cage width, depth, and wall thickness resulted in lower von Mises stress.
• Implant material properties had a negligible impact on stress levels.
• The Taguchi method demonstrated consistency, reduced experimental time/cost, and improved robustness.

Conclusions:

• The Taguchi method is effective for optimizing biomechanical devices like cervical ring cages.
• Cage dimensions are critical factors for minimizing endplate stress and subsidence risk.
• The Taguchi method shows significant potential for biomechanical applications with discrete factors.