Treatment of acromioclavicular joint separations in Japan: a survey

Katsumi Takase, Yukihiko Hata, Yutaka Morisawa, Masafumi Goto, Sakae Tanaka, Junichiro Hamada, Kenji Hayashida, Yasunari Fujii, Toru Morihara, Nobuyuki Yamamoto, Hiroaki Inui, Hiroyuki Shiozaki

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Background: Treatment options for acromioclavicular joint (ACJ) separations are highly dependent on severity, as well as the patient's background. Furthermore, some patients can be switched from conservative to surgical treatment. In this study, we conducted a mail-based questionnaire survey of members of the Japan Shoulder Society on the administration of treatments for ACJ separations. Methods: A questionnaire survey with 5 categories was mailed to all 1655 members of the Japan Shoulder Society (including 59 councilors): initial treatment, whether surgery was performed, indications for surgery based on severity, switching from conservative to surgical treatment, and surgical methods. Results: Altogether, 183 members, including 56 councilors, responded. Regarding the initial treatment, 17 respondents opted for treatment without immobilization or fixation and 166 opted for immobilization or fixation. Of the members, 11 opted for only conservative treatment whereas 172 chose surgery depending on the case; of the latter, 9 considered it for patients with a Rockwood classification of type 2 or higher; 120, for patients with type 3 or higher; and 172, for patients with types 4-6. Furthermore, 75 of 172 members had experience switching to surgical treatment during conservative treatment. For 64 of 172 members, the modified Cadenat method was the most common surgical method. Conclusions: Only 11 members opted for conservative treatment of ACJ separations, and approximately 95% of physicians chose surgery. Furthermore, >70% of physicians considered surgery for an injury classified as type 3 or higher, and 37% of members performed the modified Cadenat method. However, the popularization of arthroscopic surgery may affect the selection of surgical methods in the future.

Original languageEnglish
Pages (from-to)51-55
Number of pages5
JournalJSES International
Issue number1
Publication statusPublished - 2021 Jan


  • Acromioclavicular joint separations
  • Experts
  • Rockwood classification
  • Survey Study
  • conservative treatment
  • indications for surgery
  • initial treatment
  • surgical methods


Dive into the research topics of 'Treatment of acromioclavicular joint separations in Japan: a survey'. Together they form a unique fingerprint.

Cite this