Long-term results of an anatomically implanted hip arthroplasty with a short stem prosthesis(MiniHip^TM)

• 作者: Andreas Breil-Wirth Christian Grasselli Christian Kothny Joerg Jerosch Jorn Bengt Seeger Lars V von Engelhardt
• 来源期刊: 世界骨科杂志
• 学科: 医学
• 关键词: Primary hip ARTHROPLASTY Long-term results SHORT STEM endoprothesis Prospective follow-up study Stress-shielding
• 年，卷（期）: 2018,（10）
• 页码范围: 210-219
• 页数: 10页
• 分类号: R

摘要

AIM To evaluate the clinical and radiological outcome nine and ten years after short-stemmed,bone preserving and anatomical hip arthroplasty with the MiniHipTM system.METHODS In a prospective study,186 patients underwent hip arthroplasty with a partial neck preserving short stem(MiniHip^TM,Corin).Elderly patients were not excluded from this study,thus the mean age at the time of surgery was 59.3 years(range 32 to 82 years).Surgery and the follow-up assessments were performed at two Centers.Up until now,the mean follow-up was 112.5±8.2 mo.The Oxford Hip Score(OHS)and the Hip Dysfunction Osteoarthritis and Outcome Score(HOOS)was assessed pre-and each year after surgery.The clinical follow-up was accompanied by standardized a.p.and axial radiological examinations.Periprosthetic lucencies,hypertrophies within the Gruen zones one to fourteen were assessed.A subsidence of the stem was investigated according to Morray and heterotopic ossifications were assessed according to Brooker.RESULTS The OHS and HOOS improved from 18±3.3 to 46±2.0 and from 30±8.3 to 95±4.6 points,P<0.001 respectively.There were no differences regarding age,etiology,friction pairings,etc.,(P>0.05).Two stems were revised due to a symptomatic subsidence four and twelve months postoperatively.Thus,the survivorship for aseptic loosening at nine to ten years was 98.66%.Including one stem revision due to a symptomatic exostosis,bursitis and thigh pain as well as one revision because of a septic stem loosening,the overall survival for the stem with revision for any reason was 97.32%.Besides one asymptomatic patient,radiological signs of a proximal stress-shielding,such as bone resorptions within the proximal Gruen zones,were not noticed.Findings suggesting a distal loading,e.g.,bony hypertrophies or bone appositions of more than 2 mm,were also not detected.CONCLUSION Regarding these first long-term results on the MiniHipTM,the implant performed exceedingly well with a high rate of survivorship for aseptic loosening.Our radiological results within the