Contributions of authors

Ender, Stephan Albrecht; Machner, A.; Pap, G.; Hubbe, Johannes; Grasshoff, H; Neumann, Hans

doi:10.1080/17453670710014301

Cited by 36 publications

(15 citation statements)

References 31 publications

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“…3,9,18 A proximal anchorage of short stems may lead to the application of more physiological load. 2,7,9,18 This was demonstrated by Morrey et al . in their 7-year survival rates of the Mayo short stem of 98%.…”

Section: Discussionmentioning

confidence: 70%

“…7,16 This has led to the development of short stems for THA. 2,3,7,9,17 These prostheses can be implanted using a less- or minimally-invasive surgical approach to avoid muscle damage, preserve proximal bone, and to start rehabilitation earlier. 3,9,18 A proximal anchorage of short stems may lead to the application of more physiological load.…”

Section: Discussionmentioning

confidence: 99%

“…2-4 Within the class of short stem THA, one has to take different stem designs into account. 5 Today there is a variety of newly-developed short stems, which in recent years were used for the first time with only a few published results.…”

Section: Introductionmentioning

confidence: 99%

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Clinical results of the Metha short hip stem: a perspective for younger patients?

et al. 2013

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In recent years, various uncemented proximal metaphyseal hip stems were introduced for younger patients as a bone preserving strategy. Initial osteodensitometric analyses of the surrounding bone of short stems indicate an increase of bone mass with secondary bone ingrowth fixation as a predictor of long-term survival of these types of implants. We report the outcome of 151 modular Metha short hip stem implants in 148 patients between March 2005 and October 2007. The mean follow-up was 5.8±0.7 years and the mean age of the patients was 55.7±9.8 years. Along with demographic data and co-morbidities, the Harris Hip Score (HHS), the Hip dysfunction and Osteoarthritis Outcome Score (HOOS), and also the results of a patient-administered questionnaire were recorded pre-operatively and at follow-up. The mean HHS increased from 46±17 pre-operatively to 90±5 the HOOS improved from 55±16 pre-operatively to 89±10 at the final follow-up. A total of three patients have been revised, two for subsidence with femoral revision and one for infection without femoral revision (Kaplan Meier survival estimate 98%). The radiological findings showed no radiolucent lines in any of the patients. The modular Metha short hip stem was implanted in younger patients, who reported an overall high level of satisfaction. The clinical and radiographic results give support to the principle of using short stems with metaphyseal anchorage. However, long-term results are necessary to confirm the success of this concept in the years to come.

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Section: Discussionmentioning

confidence: 70%

Section: Discussionmentioning

confidence: 99%

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Clinical results of the Metha short hip stem: a perspective for younger patients?

et al. 2013

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“…3 of the 39 prostheses were revised: 1 prosthesis was revised because of dislocation following excessive subsidence due to usage of an undersized component and 2 prostheses, which were both firmly fixed, were revised due to severe, persistent thigh pain. Severe persistent pain of the operated hip as a reason for revision is not uncommon after implantation of a CUT prosthesis, and has been reported by several authors (Ender et al 2007, Ishaque et al 2009, Steens et al 2010). As such, it may be a characteristic of this particular prosthesis.…”

Section: Discussionmentioning

confidence: 83%

“…Only short and medium-term clinical results of the CUT prosthesis have been published (Thomas et al 2004, Ender et al 2007, Rudert et al 2007, Ishaque et al 2009, Steens et al 2010). In these reports, the reported medium-term survival varied from 50% to 98%.…”

mentioning

confidence: 99%

5-year clinical and radiostereometric analysis (RSA) follow-up of 39 CUT femoral neck total hip prostheses in young osteoarthritis patients

2012

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Background As the number of young patients receiving total hip arthroplasty increases, bone-saving implantations facilitating possible future revision, such as the CUT femoral neck prosthesis, are gaining importance. There have been few medium-term results reported for this prosthesis, however, and its migration pattern has not been analyzed.Patients and methods 39 consecutive CUT femoral neck prostheses were implanted in 32 patients, mean age 37 (17–58) years, with symptomatic osteoarthritis and either less than 55 years of age or with an anatomic anomaly preventing implantation of a diaphyseal stem (n = 1). Patients were followed prospectively using routine clinical examination and radiostereometric analysis (RSA) at 6, 12, 26, and 52 weeks postoperatively and annually thereafter. This study evaluated the 5-year follow-up results.Results The mean Harris hip score increased from 26 (3–51) points preoperatively to 84 (66–98), 86 (55–98), and 87 (47–98) points at 3, 12, and 60 months. 3 stems were revised: 1 after luxation following excessive subsidence due to an undersized component and 2 due to persistent strong thigh pain. 5-year survival was 95% (95% CI: 87–100). Initial migration varied widely in magnitude; median total tip migration was 0.42 mm (0.09–9.4) at 6 weeks, 0.92 mm (0.18–5.9) at 1 year, and 1.10 mm (0.13–6.4) at 5 years. Even after high initial migration, stabilization was achieved in 31 of the 35 RSA-evaluable implants. 3 prostheses showed progressive continuous migration throughout the entire follow-up period, and were considered to be loose, suggesting reduced long-term survival.Interpretation Currently, we cannot recommend the CUT femoral neck prosthesis as a routine treatment option in (young) patients requiring THA. The CUT prosthesis may not reach the 90% survival benchmark at 10 years, and the prosthesis is difficult to implant. If initial stabilization is achieved, however, aseptic loosening is unlikely. A good clinical outcome was seen in the surviving prostheses. We will continue to follow this patient group.

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