Surface and micromechanical analysis of polyurethane plates with hydroxyapatite for bone structure

Polímeros

article

Amaral, Wenderson da Silva do¹  Mendes, Milton Thélio de Albuquerque¹  Câmara, João Victor Frazão²  Pierote, Josué Junior Araujo³  Reis, Fernando da Silva¹  Matos, José Milton Elias de¹  Fialho, Ana Cristina Vasconcelos¹  Moura, Walter Leal de¹ 

[1] Universidade Federal do Piauí;Universitätsklinikum des Saarlandes;Universidade Santo Amaro

关键词: biocompatible materials;    castor oil;    fractures;    bone;   

DOI  :  10.1590/0104-1428.20220058

学科分类：社会科学、人文和艺术（综合）

来源: Brazilian Academy Of Neurology

【 摘 要 】

To analyze the surface topography and mechanical properties of a polyurethane derived from castor oil reinforced with hydroxyapatite (PU–HA) for bone fixation. The surface analysis was performed by Scanning Electron Microscopy (SEM) and the mechanical properties by Vickers microhardness and tensile tests. The SEM images showed that the PU surface presented important characteristics for materials intended for bone fixation, such as an irregular and porous surface. The analysis showed a surface with alternating areas with depressions and elevations of approximately 80±100 µm, presence of pores of 12 µm in size. The microhardness analysis showed values of 0.42±1.01 HV for PU–HA plates, lower in relation to the poly lactic-co-glycolic acid (PLGA) plate (control group). The elastic modulus and ultimate tensile strength of 317.4 MPa, and 35.57 MPa for PLGA sample, 1.187 MPa, and 0.29 MPa for PU–HA sample. The PU produced showed good surface properties, however demands better mechanical properties.

【 授权许可】

CC BY