Anvil-profiled penetrating keratoplasty: load resistance evaluation
Authors: Canovetti A., Rossi F., Rossi M., Menabuoni L., Malandrini A., Pini R., Ferrara P.
Autors Affiliation: Nuovo Osped S Stefano, UO Oculist Asl 4, Via Suor Niccolina Infermiera, I-59100 Prato, Italy; CNR, Ist Fis Applicata, Via Madonna Piano 10, I-50019 Sesto Fiorentino, FI, Italy; CNR, Ist Nazl Ott, Via G Moruzzi 1, I-56124 Pisa, Italy
Abstract: The aim of this study was to qualitatively evaluate the biomechanical load resistance of different surgical wound configurations (mushroom, zig-zag, anvil and conventional trephination) in penetrating keratoplasty (PK) by designing a 2D and a 3D finite-element biomechanical model of the cornea. A mathematical model of the human cornea was developed, and different geometric configurations for PK were designed. The internal pressure was raised until the wound misaligned; wound prolapse then occurred. Better wound resistance was found in all the laser trephined profiles tested in comparison with the conventional straight one. The anvil profile was more resistant to the increasing internal pressure than was the mushroom or the zig-zag pattern. Thanks to its greater mechanical load resistance, the anvil profile made possible the apposition of a restricted number of sutures and early suture removal. These advantages can contribute to a faster visual recovery in patients undergoing penetrating keratoplasty.
Journal/Review: BIOMECHANICS AND MODELING IN MECHANOBIOLOGY
Volume: 18 (2) Pages from: 319 to: 325
KeyWords: Laser-assisted penetrating keratoplasty; Cornea; Surgical wound; Transplanted graft resistance; FEM modelDOI: 10.1007/s10237-018-1083-yCitations: 5data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2021-10-17References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here