Finite element analysis of cornea deformation and curvature change during the keratoplasty suturing process
10.1007/s13534-019-00100-4
- Author:
Jong Won BAEK
1
;
Seong Jin PARK
Author Information
1. Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Cheongam-ro, Nam-Gu, Pohang, Gyeongbuk 37673, Korea. sjpark87@postech.ac.kr
- Publication Type:Original Article
- Keywords:
Cornea curvature;
Keratoplasty;
Finite element methods (FEM);
Suturing
- MeSH:
Cornea;
Corneal Transplantation;
Finite Element Analysis;
Humans;
Keratitis;
Methods;
Retina;
Visual Acuity
- From:
Biomedical Engineering Letters
2019;9(2):203-209
- CountryRepublic of Korea
- Language:English
-
Abstract:
Keratoplasty, which is cornea transplant surgery, is one of the treatment methods for patients with turbidity or keratitis. Recently, keratoplasty using a surgical robot was studied to increase precision. In this study, the effect of surgical factors on the deformation and curvature of the cornea were analyzed in order to improve the accuracy of keratoplasty and derive the optimal surgical factors using finite element method (FEM). Suturing tension and depth were selected as surgical factors. An FEM model, a constitutive equation, and boundary conditions were determined using experiments and reference data. Suturing tension significantly impacted deformation and curvature change, and suturing depth affected the position of the thread-cornea contact point. Both factors have a significant impact on a focal point in the retina and the patient's visual acuity after keratoplasty.
