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Background <p>In cases of focally limited chondral or osteochondral lesions of the knee the question arises whether focal metallic resurfacing (small implant) is a meaningful surgical alternative to classical partial knee replacement.</p> Operative technique <p>The implants are inserted in the region of the femoral condyle and trochlea by a&#xa0;mini-arthrotomy approach. The small implants can be divided into two different groups: standard implants of different sizes and patient-specific implants and instruments. Both implants enable immediate full weight bearing without restriction of the loading or range of motion.</p> Results <p>The midterm results reveal a&#xa0;good clinical outcome, low complication and revision rates with respect to the contraindications. Long-term results are missing so far.</p> Conclusion <p>Small implants are a&#xa0;safe treatment option with a&#xa0;low complication rate and good midterm results for patients with focal (osteo)chondral lesions and contraindications for biological cartilage repair. The contraindications must always be considered, which means that small implants will remain a&#xa0;practical solution for patients where a&#xa0;biological cartilage repair is no longer possible and a&#xa0;classical partial knee replacement is not yet indicated.</p>

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Fokaler metallischer Oberflächenersatz

  • 期刊论文

  • 发表日期：

    2025年4月10日

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  • Felix Ferner,
  • Jörg Dickschas

摘要

Background

In cases of focally limited chondral or osteochondral lesions of the knee the question arises whether focal metallic resurfacing (small implant) is a meaningful surgical alternative to classical partial knee replacement.

Operative technique

The implants are inserted in the region of the femoral condyle and trochlea by a mini-arthrotomy approach. The small implants can be divided into two different groups: standard implants of different sizes and patient-specific implants and instruments. Both implants enable immediate full weight bearing without restriction of the loading or range of motion.

Results

The midterm results reveal a good clinical outcome, low complication and revision rates with respect to the contraindications. Long-term results are missing so far.

Conclusion

Small implants are a safe treatment option with a low complication rate and good midterm results for patients with focal (osteo)chondral lesions and contraindications for biological cartilage repair. The contraindications must always be considered, which means that small implants will remain a practical solution for patients where a biological cartilage repair is no longer possible and a classical partial knee replacement is not yet indicated.