Technical standards of a foldable capsular vitreous body in terms of mechanical, optical, and biocompatible properties.
We previously proposed a new strategy to fabricate a novel foldable capsular vitreous body (FCVB) as a vitreous substitute and found that the FCVB was a very good replacement for closely mimicking the morphology and restoring the physiologic function of the rabbit vitreous body. The aim of this article was to assess the mechanical, optical, and biocompatible properties of a FCVB made from liquid silicone rubber. The mechanical properties show that the shore hardness is 37.80 degrees, the tear strength is 47.14 N/mm, the tensile strength is more than 7.28 MPa, and the elongation ratio is more than 1200%; in addition, the FCVB has 300 nm mili apertures in the capsule. The optical properties reveal that transmittances are 92%, hazes are 5.74%, and spectral transmittance is 97%. The transmittance mission is 2.3% and can sustain a 1500 mW, 0.2 s, 532 nm green laser. The biocompatible properties are shown in the stable extracts experiment, no significant fever, good genetic safety, and no structural abnormality or apoptosis in the cornea, ciliary body, and retina over a 6-month observation period. These results indicate that the FCVB has good mechanical, optical, and biocompatible properties, and the assessment results can be recommended as the FCVB technical standards for industrial manufacturing and inspection.
Liu
Yaqin
Y
State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China.
Jiang
Zhaoxin
Z
Gao
Qianying
Q
Ge
Jian
J
Chen
Jiajia
J
Cao
Xianwu
X
Shen
Qingxiang
Q
Ma
Ping
P
D000818:Animals; D001672:Biocompatible Materials / Q000737:chemistry*; D005123:Eye / Q000166:cytology / Q000648:ultrastructure; D006244:Hardness; D006801:Humans; D008422:Materials Testing; D051379:Mice; D055620:Optical Phenomena; D020273:Orbital Implants; D011817:Rabbits; D012826:Silicone Elastomers / Q000737:chemistry*; D013718:Tensile Strength; D014822:Vitreous Body / Q000033:anatomy & histology
D001672:Biocompatible Materials; D012826:Silicone Elastomers