Influence of Electron Beam Melting Manufactured Implants on Ingrowth and Shear Strength in an Ovine Model

被引:55
作者
Bertollo, Nicky [1 ]
Da Assuncao, Ruy [1 ]
Hancock, Nicholas J. [1 ]
Lau, Abe [1 ]
Walsh, William R. [1 ]
机构
[1] Univ New S Wales, Surg & Orthopaed Res Labs, Prince Wales Clin Sch, Sydney, NSW, Australia
关键词
electron beam melting; uncemented fixation; rapid prototyping; bone ingrowth; shear strength; MECHANICAL EVALUATION; TI-6AL-4V STRUCTURES; TITANIUM; MICROSTRUCTURE; FIXATION; TI6AL4V;
D O I
10.1016/j.arth.2012.02.025
中图分类号
R826.8 [整形外科学]; R782.2 [口腔颌面部整形外科学]; R726.2 [小儿整形外科学]; R62 [整形外科学(修复外科学)];
学科分类号
摘要
Arthroplasty has evolved with the application of electron beam melting (EBM) in the manufacture of porous mediums for uncemented fixation. Osseointegration of EBM and plasma-sprayed titanium (Ti PS) implant dowels in adult sheep was assessed in graduated cancellous defects and under line-to-line fit in cortical bone. Shear strength and bony ingrowth (EBM) and ongrowth (Ti PS) were assessed after 4 and 12 weeks. Shear strength of EBM exceeded that for Ti PS at 12 weeks (P = .030). Ongrowth achieved by Ti PS in graduated ca.ncellous defects followed a distinctive pattern that correlated to progressively decreasing radial distances between defect and implant, whereas cancellous ingrowth values at 12 weeks for the EBM were not different. Osteoconductive porous structures manufactured using EBM present a viable alternative to traditional surface treatments.
引用
收藏
页码:1429 / 1436
页数:8
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