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Radiolucent rings around bioabsorbable anchors after rotator cuff repair are not associated with clinical outcomes

  • Arthroscopy and Sports Medicine
  • Published:
Archives of Orthopaedic and Trauma Surgery Aims and scope Submit manuscript

Abstract

Purpose

Various researchers have observed small areas of osteolysis after using bioabsorbable anchors in shoulder surgeries. The purpose of this study is to determine whether radiographic perianchor radiolucent rings after rotator cuff repair are associated with the failure of repair and also assess their clinical implications. Further, the most frequent location of the radiolucent rings in the double-row suture bridge configuration was also assessed.

Methods

One hundred and twenty-nine consecutive patients who underwent arthroscopic rotator cuff repair by suture bridge technique were retrospectively evaluated radiographically and clinically. The number and size of the rings that appeared at each follow-up were recorded. Also, the locations of each ring were recorded as anterior, middle or posterior, and medial or lateral according to the construct of the anchors used for suture bridge technique. The size of the tear, the number of anchors used and age of the patients were compared. Re-tear rates according to ultrasound examinations were also analyzed.

Results

After rotator cuff repair, the mean American Shoulder and Elbow Surgeons (ASES) score increased from 46.7 to 88.0 and the overall re-tear rate was 8.5% (11 cases). Seventy-three patients (56.6%) showed RR (total number of 99 rings) at least once during the course of their follow-up and the rings appeared at a mean period of 18.2 months after surgery. Mean size of the rings initially was 5.6 mm and the rings increased or decreased in mean size of 0.4 mm during mean follow-up of 37 months. No correlation was seen with the number of RRs and the rate of re-tears, number of anchors, size of tears, and clinical outcome as determined by the ASES score. Radiolucent ring measurement reproducibility was confirmed by independent, repeated measurements. The rings appeared mostly at anteromedial anchors (75 rings, 75.8%) and the authors suggest that mechanical factors may play a role for the cause of radiolucent rings.

Conclusions

The number and the size of RRs around bioabsorbable anchors after rotator cuff repair do not appear to adversely affect the healing and clinical outcome of ARCR. Most radiolucent rings appeared at anteromedial anchors, indicating that mechanical factors may play a role for the radiolucencies.

Level of evidence

Case series, level IV.

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Authors and Affiliations

  1. NEON Orthopaedic Clinic, Seoul, Korea

    Jin-Young Park

  2. Department of Orthopedic Surgery, Seoul Paik Hospital, Inje University, Mareunnae-ro 9, Jung-gu, Seoul, Korea

    Suk-Hwan Jang

  3. Department of Orthopedic Surgery, School of Medicine, Konkuk University, Seoul, Korea

    Kyung-Soo Oh & Yi Jin Li

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  1. Jin-Young Park
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  2. Suk-Hwan Jang
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  4. Yi Jin Li
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Correspondence to Suk-Hwan Jang.

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Conflict of interest

Authors Jin-Young Park, Suk-Hwan Jang, Kyung-Soo Oh, and Yi Jin Li declare that they have no conflict of interest.

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Park, JY., Jang, SH., Oh, KS. et al. Radiolucent rings around bioabsorbable anchors after rotator cuff repair are not associated with clinical outcomes . Arch Orthop Trauma Surg 137, 1539–1546 (2017). https://doi.org/10.1007/s00402-017-2772-1

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  • DOI: https://doi.org/10.1007/s00402-017-2772-1

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