• Arch Orthop Trauma Surg · Dec 2024

    Long-term results of short stem total hip arthroplasty in patients with osteonecrosis of the femoral head.

    • Yingyong Suksathien, Jithayut Suarjui, Thanut Tippimanchai, Rachawan Suksathien, Bankchart Lajuntuk, and Sirawitz Khamphaeng.
    • Department of Orthopaedic Surgery, Maharat Nakhon Ratchasima Hospital, Chang Phueak Rd, Mueang District, Nakhon Ratchasima Province, Ratchasima Province, 30000, Thailand. yingyongsuksathien@gmail.com.
    • Arch Orthop Trauma Surg. 2024 Dec 12; 145 (1): 99.

    IntroductionShort stem total hip arthroplasty (THA) is an alternative to conventional stem, designed to facilitate minimal-invasive surgery, physiological loading and preserve bone stock. However, there is insufficient evidence of the long-term outcomes in patients with osteonecrosis of the femoral head (ONFH). This study aims to analyze the clinical and radiographic results with a minimum follow-up of 10 years. Furthermore, the survival rate of the short stem was calculated.Materials And MethodsThere were 81 patients (101 hips) with the mean age of 45 years (range, 21 to 68) in this study. The Harris Hip Scores (HHS) and Forgotten Joint Scores (FJS) were recorded to evaluate the clinical results. The appearance of osteointegration and radiolucent line were reviewed. The mean follow-up period was 129.3 months (range, 120-154).ResultsAt the latest follow-up, the mean HHS and FJS were 96.9 ± 5.7 (range, 69-100) and 95 ± 7 (range, 75-100) points respectively. The radiographic changes around the stem showed osteointegration mainly in the proximal part, zones 1 (94.1%), 2 (84.2%), 6 (99%) and 7 (92.1%). One stem underwent revision due to periprosthetic fracture, using conventional stem with plate and screws. Survivorship of the stem with the endpoint for any reason was 99.01% (95% confidence interval [CI], 93.18-99.86%) and for aseptic loosening was 100% at 10 years.ConclusionShort stem showed promising long-term clinical outcomes in patients with ONFH. The radiographic results demonstrated physiological proximal load transfer.© 2024. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.

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