The Cementless Pm Hip Arthroplasty

Dickob, Michael; Martini, Thomas

doi:10.1302/0301-620x.78b2.0780195

Cited by 32 publications

(23 citation statements)

References 14 publications

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“…Considering that Onsten evaluated cemented implants, the effect of body [5][6][7][8][9][10]. Other, studies have indicated that a high BMI is linked with stem loosening [22] and a poor clinical outcome [23]. Moreover it has been reported that each additional BMI unit increases the risk of loosening [4].…”

Section: Discussionmentioning

confidence: 99%

Subsidence of a cementless femoral component influenced by body weight and body mass index

Stihsen

Radl

Keshmiri

et al. 2011

International Orthopaedics (SICOT)

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Purpose This trial was designed to evaluate the impact of physical characteristics such as body mass index, body weight and height on distal stem migration of a cementless femoral component, as the influence of obesity on the outcome of THA is still debated in literature and conflicting results have been found. Methods In this retrospective cohort study, migration patterns for 102 implants were analysed using the EinzelBild-Roentgen-Analyse (EBRA-FCA, femoral component analysis). In all cases the Vision 2000 stem was implanted and combined with the Duraloc acetabular component (DePuy, Warsaw, Indiana). Results The mean follow-up was 93 months. EBRA-FCA evaluations revealed a mean subsidence of 1.38 mm after two years, 2.06 mm after five and 2.24 mm after seven years. Five stems loosened aseptically. Correlation between increased migration over the whole period and aseptic loosening was highly significant (p<0.001). Surgical technique had a significant influence on migration and stem stability (p= 0.002) but physical patient characteristics such as body weight over 75 kg and height over 165 cm also significantly influenced stem subsidence towards progressive migration (p=0.001, p<0.001). However, a high BMI did not trigger progressive stem migration (p=0.87). Being of the male gender raised the odds for increased migration (p=0.03). Conclusion Physical characteristics such as body weight and height showed significant influence on migration patterns of this cementless femoral component. The operating surgeon should be aware that body weight above 75 kg and height over 165 cm may trigger increased stem migration and the surgeon should aim to fit these prostheses as tightly as possible. However this study demonstrates that a high BMI does not trigger progressive stem migration. Further investigations are needed to confirm our findings.

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Section: Discussionmentioning

confidence: 99%

Subsidence of a cementless femoral component influenced by body weight and body mass index

Stihsen

Radl

Keshmiri

et al. 2011

International Orthopaedics (SICOT)

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“…Excellent long-term results are known for some cemented stems [1,4]. On the other hand, implantation without cement may have some benefits and increasing interest in uncemented hip replacement is reflected in a high number of recent publications [3,5,6,22].…”

Section: Introductionmentioning

confidence: 99%

Results of a cemented titanium alloy straight femoral shaft prosthesis after 10 years of follow-up

Eingartner

Volkmann²,

Winter

et al. 2001

International Orthopaedics (SICOT)

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Two-hundred fifty implantations of a cemented femoral stem made of titanium alloy in 239 patients were followed for 9.7 years (range 8.7-10.3 years). Eighty-nine patients with 93 hips have died and two could not be located. Five hips have been revised, two for infection, one for aseptic loosening and two during revision of the cup. Three stems showed radiological loosening but have not been revised. The average hip score was 85. The results are encouraging and comparable to other cemented femoral stems.Résumé 250 implantations d'une tige fémorale cimentée en alliage de titane chez 239 malades ont été suivies pendant 9.7 années (8.7-10.3 années). 89 malades avec 93 prothèses sont morts et deux sont perdus de vue. Cinq hanches ont été révisées, deux pour infection, une pour descellement aseptique et deux pour une révision de la cupule acétabulaire. Trois tiges ont présentés un descellement radiologique mais n'ont pas été reprises. Le score moyen était de 85. Les résultats sont encourageant set comparables à ceux des autres tiges fémorales cimentées.

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“…In Europe, the system was used in more than 60,000 patients. After good early results (Parhofer and Ungethum 1984, Krodel and Refior 1988, Wolf et al 1988, the mid-term results turned out to be moderate at best (Reichelt and Botterer 1993, Dickob and Martini 1996, Karches et al 1996) with a 6-year survival rate of 88%.…”

mentioning

confidence: 99%

High long-term loosening rate of conical screw cups

et al. 2006

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Background Acetabular screw cups seem to give high primary stability. We analyzed the migration and loosening behavior of a first-generation screw cup in a longterm follow-up.Patients and methods We examined 92 uncemented titanium alloy conical screw cups prospectively. Implant migration was assessed with a digital high-precision method (EBRA) with an accuracy of 1.0 mm.Results After mean 11 (0.5-18) years, 87 patients were available for examination and 5 patients had died. 32 implants had been revised and 7 cases showed radiographic evidence of loosening. The 10-year survival rate was 71%. Migration of more than 1 mm occurred in 53 hips. Implant survival was strongly associated with an annual migration of greater than 0.2 mm.Interpretation The long-term behavior of this cup is not satisfactory. In spite of extraordinarily high primary implant stability, secondary osseointegration of this cup often fails. The annual migration rate represents a valid parameter for prediction of implant survival.

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The Cementless Pm Hip Arthroplasty

Cited by 32 publications

References 14 publications

Subsidence of a cementless femoral component influenced by body weight and body mass index

Subsidence of a cementless femoral component influenced by body weight and body mass index

Results of a cemented titanium alloy straight femoral shaft prosthesis after 10 years of follow-up

High long-term loosening rate of conical screw cups

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