Impaction autografting: bone-preserving, secure fixation of a standard humeral component

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• 作者：Robert M. Lucas ; MD^a ; Jason E. Hsu ; MD^a ; Albert O. Gee ; MD^a ; Moni B. Neradilek ; MS^b ; Frederick A. Matsen III ; MD^a ; ^{matsen@uw.edu" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Level IV ; Case Series ; Treatment Study
• 刊名：Journal of Shoulder and Elbow Surgery
• 出版年：2016
• 出版时间：November 2016
• 年：2016
• 卷：25
• 期：11
• 页码：1787-1794
• 全文大小：1747 K

文摘

When fixed with bone ingrowth, a tight diaphyseal press fit, or cement, the humeral component of a shoulder arthroplasty may present problems of malposition, stress shielding, or periprosthetic fracture or difficulty with removal at revision arthroplasty. We have avoided the need for these fixation methods by using impaction cancellous autografting of the humeral stem, minimizing contact between the prosthetic stem and the humeral cortex. This study presents the radiographic survivorship of impaction-autografted humeral implants using component subsidence as the primary endpoint.

Methods

We reviewed 286 primary anatomic shoulder arthroplasties having an average follow-up of 4.9 ± 2.7 years. Initial postoperative radiographs and minimum 2-year follow-up radiographs were evaluated by 3 observers to assess subsidence.

Results

Two different implants (Humeral Replacement Prosthesis [HRP] and Global Advantage prosthesis) were used. Of 286 stems, 267 (93.4%) had not subsided. The Global Advantage prosthesis had a subsidence-free survival rate of 98.5% at 5 years. The stiffer-stemmed HRP used early during the study had a higher rate of subsidence compared with the currently used Global Advantage stem (hazard ratio, 5.6; P = .001). Radiolucent lines of 2 mm or greater were less common for the Global Advantage prosthesis than for the HRP in each of 7 zones (P < .001). Total shoulder arthroplasty was associated with a higher rate of subsidence compared with hemiarthroplasty (hazard ratio, 2.6; P = .12).

Conclusions

Impaction autografting provides a secure, durable, bone-preserving means of humeral component fixation in anatomic shoulder arthroplasty.