Long-term outcomes of the mayo conservative hip system in patients aged 30 years or less with osteonecrosis of the femoral head: mean follow-up of more than 10 years
- 06.05.2024
- Hip Arthroplasty
Erschienen in:
- Verfasst von
-
Masanori Nishi
Korrespondierender Autor Masanori Nishi
- Department of Orthopaedic Surgery, Showa University School of Medicine, 142-8666, Tokyo, Japan
- Department of Orthopaedic Surgery, Sassa General Hospital, 188-0011, Tokyo, Japan
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Takashi Atsumi
Takashi Atsumi
- Department of Orthopaedic Surgery, Showa University School of Medicine, 142-8666, Tokyo, Japan
- Department of Orthopaedic Surgery, Sassa General Hospital, 188-0011, Tokyo, Japan
-
Yasushi Yoshikawa
Yasushi Yoshikawa
- Department of Orthopaedic Surgery, Showa University School of Medicine, 142-8666, Tokyo, Japan
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Ryosuke Nakanishi
Ryosuke Nakanishi
- Department of Orthopaedic Surgery, Sassa General Hospital, 188-0011, Tokyo, Japan
- Department of Orthopaedic Surgery, Showa University Fujigaoka Hospital, 227-8501, Yokohama City, Japan
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Minoru Watanabe
Minoru Watanabe
- Department of Orthopaedic Surgery, Showa University Fujigaoka Hospital, 227-8501, Yokohama City, Japan
-
Yoshifumi Kudo
Yoshifumi Kudo
- Department of Orthopaedic Surgery, Showa University School of Medicine, 142-8666, Tokyo, Japan
- Erschienen in
- Archives of Orthopaedic and Trauma Surgery | Ausgabe 6/2024
Abstract
Introduction
Historically, total hip arthroplasty (THA) in very young patients has been associated with lower survivorship. However, the long-term outcomes of THA using short stems for osteonecrosis of the femoral head (ONFH) in very young patients remain unclear. Therefore, this study aimed to investigate the long-term outcomes of the Mayo conservative hip system, a short metaphyseal stabilised stem, in patients with ONFH aged ≦30 years.
Materials and Methods
We retrospectively reviewed 104 joints in 76 patients with ONFH who underwent THA using the Mayo conservative hip system with a minimum follow-up of 8 years. The mean follow-up period was 12.5 (range, 8–19) years. Patients were categorised into two age groups (≦30 years, n = 21 and > 30 years, n = 83). Radiographic evaluation was used to assess stem sinking, stress shielding, and spot welds. The clinical evaluations were performed using the Japanese Orthopedic Association (JOA) hip score. Postoperative major complication and revision surgery rates were also assessed.
Results
The patient characteristics were similar between the two groups, except for the age. Revision surgeries were performed in five cases, with similar implant survival rates between the groups. Dislocations occurred in the older age group alone (four joints). One case of intra-operative periprosthetic femoral fracture was found in the younger age group. Stem sinking of > 3 mm occurred in one and seven joints in the younger and older age groups, respectively. Spot welds were observed in most joints (93.2%) in modified Gruen zones 2 and 6 without significant differences between the groups. Stress shielding showed no significant differences in the frequency of occurrence or location between the two groups. Furthermore,the JOA score showed no significant difference between the two groups.
Conclusion
The use of short stems in patients aged ≤ 30 years with ONFH showed favourable long-term outcomes.
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- Titel
- Long-term outcomes of the mayo conservative hip system in patients aged 30 years or less with osteonecrosis of the femoral head: mean follow-up of more than 10 years
- Verfasst von
-
Masanori Nishi
Takashi Atsumi
Yasushi Yoshikawa
Ryosuke Nakanishi
Minoru Watanabe
Yoshifumi Kudo
- Publikationsdatum
- 06.05.2024
- Verlag
- Springer Berlin Heidelberg
- Erschienen in
-
Archives of Orthopaedic and Trauma Surgery / Ausgabe 6/2024
Print ISSN: 0936-8051
Elektronische ISSN: 1434-3916 - DOI
- https://doi.org/10.1007/s00402-024-05339-w
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