Hydroxyapatite-coated double network hydrogel directly bondable to the bone: Biological and biomechanical evaluations of the bonding property in an osteochondral defect

被引：39

作者：

Wada, Susumu ^{[1
]}

Kitamura, Nobuto ^{[1
,3
]}

Nonoyama, Takayuki ^{[2
,3
]}

Kiyama, Ryuji ^{[4
]}

Kurokawa, Takayuki ^{[2
,3
]}

Gong, Jian Ping ^{[2
,3
]}

Yasuda, Kazunori ^{[1
]}

机构：

[1] Hokkaido Univ, Grad Sch Med, Dept Sports Med, Kita-15,Nishi-7, Sapporo, Hokkaido 0608638, Japan

[2] Hokkaido Univ, Fac Adv Life Sci, Dept Adv Transdisciplinary Sci, Lab Soft & Wet Matter, Kita-10,Nishi-8, Sapporo, Hokkaido 0600810, Japan

[3] Hokkaido Univ, Global Inst Collaborat Res & Educ, Global Stn Soft Matter, Kita-21,Nishi-11, Sapporo, Hokkaido 0010021, Japan

[4] Hokkaido Univ, Grad Sch Life Sci, Kita-10,Nishi-8, Sapporo, Hokkaido 0600810, Japan

来源：

ACTA BIOMATERIALIA | 2016年 / 44卷

关键词：

Double-network gel; Hydroxyapatite; Bone bonding; Osteoconductivity; Artificial cartilage; POLYVINYL ALCOHOL-HYDROGEL; MESENCHYMAL STEM-CELLS; ARTIFICIAL CARTILAGE; NANOPHASE CERAMICS; TISSUE; DIFFERENTIATION; PROLIFERATION; FRICTION; MODEL;

D O I：

10.1016/j.actbio.2016.08.016

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

We have developed a novel hydroxyapatite (HAp)-coated double-network (DN) hydrogel (HAp/DN gel). The purpose of this study was to determine details of the cell and tissue responses around the implanted HAp/DN gel and to determine how quickly and strongly the HAp/DN gel bonds to the bone in a rabbit osteochondral defect model. Immature osteoid tissue was formed in the space between the HAp/DN gel and the bone at 2 weeks, and the osteoid tissue was mineralized at 4 weeks. The push-out load of the HAp/DN gel averaged 37.54 N and 42.15 N at 4 and 12 weeks, respectively, while the push-out load of the DN gel averaged less than 5 N. The bonding area of the HAp/DN gel to the bone was above 80% by 4 weeks, and above 90% at 12 weeks. This study demonstrated that the HAp/DN gel enhanced osseointegration at an early stage after implantation. The presence of nanoscale structures in addition to osseointegration of HAp promoted osteoblast adhesion onto the surface of the HAp/DN gel. The HAp/DN gel has the potential to improve the implant-tissue interface in next-generation orthopaedic implants such as artificial cartilage. Statement of Significance Recent studies have reported the development of various hydrogels that are sufficiently tough for application as soft supporting tissues. However, fixation of hydrogels on bone surfaces with appropriate strength is a great challenge. We have developed a novel, tough hydrogel hybridizing hydroxyapatite (HAp/DN gel), which is directly bondable to the bone. The present study demonstrated that the HAp/DN gel enhanced osseointegration in the early stage after implantation. The presence of nanoscale structures in addition to the osseointegration ability of hydroxyapatite promoted osteoblast adhesion onto the surface of the HAp/DN gel. The HAp/DN gel has the potential to improve the implant-tissue interface in next-generation orthopaedic implants such as artificial cartilage. (C) 2016 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：125 / 134

页数：10

共 34 条

[1] Artificial cartilage made from a novel double-network hydrogel: In vivo effects on the normal cartilage and ex vivo evaluation of the friction property [J].