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Purpose of Review <p>The goal of this review is to discuss the current understanding of implantable shock absorbers (ISA) including mechanism of action, usage in patients, patient outcomes and the future of this technology.</p> Recent Findings <p>Since the introduction of the ISA, it mainly has functioned as a surgical option for individuals with symptomatic medial compartment osteoarthritis who are too young, not indicated, or do not wish to proceed with arthroplasty. Biomechanically, ISA reduces peak medial compartment force by 32%. In a Food and Drug Administration (FDA) study, ISA was found superior to HTO, with significant reduction of pain and improvement of function. Survivorship and freedom to conversion to arthroplasty remains 85% at 5 years. Current randomized trial focuses on impact of continued non operative treatment of OA verses ISA.</p> Summary <p>ISA is a reasonable surgical option for the treatment of medial compartment osteoarthritis without the need for disruption of the patient’s native anatomy through osteotomy or arthroplasty.</p>

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Implantable Shock Absorber: Breakthrough or Hype?

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年3月25日

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  • Jared A. Nowell,
  • David C. Flanigan

摘要

Purpose of Review

The goal of this review is to discuss the current understanding of implantable shock absorbers (ISA) including mechanism of action, usage in patients, patient outcomes and the future of this technology.

Recent Findings

Since the introduction of the ISA, it mainly has functioned as a surgical option for individuals with symptomatic medial compartment osteoarthritis who are too young, not indicated, or do not wish to proceed with arthroplasty. Biomechanically, ISA reduces peak medial compartment force by 32%. In a Food and Drug Administration (FDA) study, ISA was found superior to HTO, with significant reduction of pain and improvement of function. Survivorship and freedom to conversion to arthroplasty remains 85% at 5 years. Current randomized trial focuses on impact of continued non operative treatment of OA verses ISA.

Summary

ISA is a reasonable surgical option for the treatment of medial compartment osteoarthritis without the need for disruption of the patient’s native anatomy through osteotomy or arthroplasty.