摘要
目的 评估电子束选区熔化制备的钛合金的生物相容性,以期为钛合金的临床应用提供参考.方法 选用Ti-6Al-4V,以电子束选区熔化制备的钛合金试件与骨髓间充质干细胞共培养为钛合金组,以单纯细胞培养为对照组,通过细胞计数、细胞骨架染色和茜素红染色评估细胞相容性.12只比格犬下颌骨右侧体部制备长24 mm的块状缺损,以电子束选区熔化制备的网状钛合金作为支架修复缺损.分别于术后1、3、6、12个月通过大体、CT和组织学观察评估组织相容性.结果 培养1、3、5、7d钛合金组A值与对照组差异无统计学意义（P〉0.05）.细胞骨架染色显示细胞在钛合金上生长良好,肌动蛋白纤维束平行排列,荧光染色均匀,与对照组相比无明显差异;经成骨诱导21 d后,两组细胞外基质钙盐含量A值分别为5.7±0.7、5.1±0.6,差异无统计学意义（P〉0.05）.全部动物均耐受手术,术区愈合良好;术后CT显示网状钛合金支架固位良好,未引起周围骨吸收,下颌骨连续性得到恢复;组织学结果显示,动物肝脏和肾脏未出现毒性反应;网状支架未引起周围软组织炎症反应,网状支架与宿主骨结合良好.结论 电子束选区熔化制备的钛合金有良好的生物相容性.
Objective To investigate the biocompatibility of Ti-6Al-4V scaffolds fabricated by electron beam melting（EBM）.Methods Bone marrow mesenchymal stem cells（BMSC） co-cultured with Ti-6A1-4V specimens fabricated with EBM was prepared as experimental group and the regular cells culture was employed as control.The biocompatibility was detected using CCK-8 and cytoskeleton staining.The osteogenic differentiation ability was assessed using mineralization nodule formation.A 24 mm defect was created on the right mandibular body in 12 beagles.The mandibular defects were repaired with Ti-6A1-4V scaffolds mesh fabricated by EBM.General observation,CT and histology examination was carried out to evaluated the biocompatibility of Ti-6A1-4V scaffolds in vivo.Results CCK-8 result showed the A values of the two groups had no significant difference（P 〉 0.05）.There was no significant difference between the two groups （P〉0.05）.Cytoskeletal staining showed that cells were fully stretched out and grew well on T-i6A1-4V specimen.The actin fibers were arranged in parallel and stained uniformly with fluorescent.After osteogenic culture,the quantity of the nodule formation of the experimental group and control group were 5.7±0.7 and 5.1 ± 0.6,respectively（P〉0.05）.All animals had tolerated the surgery and healed well.CT examination showed that Ti-6A1-4V scaffolds mesh had good retention with surrounding bone and the continuity of mandible was restored.Histological examination showed that no inflammation reaction or toxity was caused in the soft tissue surrounding the scaffolds and in the liver and kidney after implantation.Ti-6A1-4V scaffolds had good retention with surrounding bone.Conclusions Ti-6Al-4V fabricated with electron beam melting has good biocompatibility.
出处
《中华口腔医学杂志》
CAS
CSCD
北大核心
2016年第11期667-672,共6页
Chinese Journal of Stomatology
基金
国家自然科学基金（81470726）
北京市科学技术委员会科技计划（D131100003013001）
关键词
下颌假体
钛
三维打印
Mandibular prosthesis
Titanium
Three dimensional printing
