Study on Size Estimation of Prosthesis in Rhinoplasty Based on Mechanical Test and Analysis

Rhinoplasty is a common plastic surgery. The determination of prosthesis size for rhinoplasty has long been dependent on the surgeon's experience. Some of the patients suffered from complications after the surgery. In this paper, we present a method for estimating the size of prosthesis in rhinoplasty. A nasal tension tester is designed and implemented. On the basis of the mechanical theory of Hyperelastic Materials, an algorithm for inverse calculation of material parameters is proposed; On the basis of the material parameters, an algorithm for estimating the safety range of nasal stretch is established. The nasal tension tester can obtain the nasal tension data without harming the subject. Our results show that different subjects generally have different nasal skin elasticity and tolerance to skin stretch. Therefore, the selection of prosthesis size for rhinoplasty should not be generalized, but should be tested and calculated separately for each subject. The results of this study are helpful for doctors to quantitatively understand the skin condition of the subject 's nose and the safe range of nasal stretch, based on which the determination of prosthesis size can be made for rhinoplasty.