In Vivo Measurements of Relative Motion Between an Uncemented Femoral Total Hip Component and the Femur by Roentgen Stereophotogrammetric Analysis

Nistor, Lars; Blaha, John; Kjellström, U; Selvik, Göran

doi:10.1097/00003086-199108000-00031

Cited by 56 publications

(32 citation statements)

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“…Another study reported an uncemented polyethylene-coated titanium stem that showed initial subsidence and then remained stable in the proximodistal direction combined with a retro-rotation of the stem (Nistor et al 1991). Söballe et al (1993) compared eight titanium-coated stems (TI) with seven hydoxyapatite stems (HA) and found the same pattern of subsidence for the HA stem as we did for the Cone prosthesis, whereas the TI-coated stem subsided over the whole 1-year period.…”

Section: Discussionsupporting

confidence: 52%

Comparison of the uncemented Cone and the cemented Bimetric hip prosthesis in young patients with osteoarthritis: An RSA, clinical and radiographic study

et al. 2006

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Section: Discussionsupporting

confidence: 52%

Comparison of the uncemented Cone and the cemented Bimetric hip prosthesis in young patients with osteoarthritis: An RSA, clinical and radiographic study

et al. 2006

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“…Migration measurements as a method of evaluating implant performance have been shown to correlate with the incidence of late aseptic failure [8,11,13]. However, the main weakness of these studies was their relative short-term follow-up, rarely covering the first postoperative decade [4,7,10,15,17], whereas the majority of the stems in our study (39/69 or 56.5%) demonstrated late onset migration with a mean survival of 12.4 years.…”

Section: Discussionmentioning

confidence: 68%

Aseptic stem loosening in primary THA: migration analysis of cemented and cementless fixation

Kroell

Beaulé

Krismer

et al. 2008

International Orthopaedics (SICOT)

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Early migration has reportedly been predictive for later implant failure. Using four different migration patterns, this study aimed to analyse migration behaviour of the two types of implant fixation-cemented and cementlessthroughout the process of loosening. Migrational behaviour of 69 revised stems (49 cemented, 20 uncemented) was analysed retrospectively with EBRA-FCA (Einzel-BildRöntgen-Analyse, Femoral Component Analysis). Uncemented stems failed after early and late onset migration alike, while late migration was the predominant pattern in cemented stems. Mean prosthetic failure after early migration occurred 5.8 (±4.4) years postoperatively due to insufficient primary stability. Initially stable stems with late onset migration were revised after 12.4 (±4.5) years. Measurement of early migration was found to be a valuable tool to screen short-term and mid-term failure. In the long run the method's sensitivity decreased. Late onset migration, however, preceded long-term failure by a mean of three years.Résumé Le but de cette étude est de rapporter les migrations précoces en rapport avec une prévision d'échec des implants. Pour cela, nous avons utilisé quatre groupes de PTH avec différentes migrations à propos du devenir de deux types de fixation des implants, cimentés ou non cimentés. l'évolution de la migration sur 69 prothèses (pièces fémorales 49 cimentées, 20 non cimentées) ont été analysées de façon rétrospective selon la méthode EBRA-FCA les pièces fémorales non cimentées peuvent présenter des échecs précoces et tardifs, alors que les prothèses cimentées ne présentent que des échecs tardifs. L'échec le plus fréquent est la migration qui se fait en moyenne à 5,8 (±4,4) ans post-opératoire en relation avec une insuffisance de stabilité primaire. Les pièces fémorales stables ont une migration beaucoup plus tardive et ne sont révisées qu'après 12,4 ans (±4,5). la mesure de la migration précoce permet de dépister les échecs à court et moyen terme. La méthode décrite est fiable, les migrations tardives cependant sont précédées d'un échec à long terme et ont évolué pendant au moins trois ans avant la reprise.

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“…isoelastic stems, was introduced to reduce stress-shielding and subsequent bone loss (Morscher andMathys 1974, Butel andRobb 1988). Earlier isoelastic stems have suffered from early loosening and a high revision rate (Nistor et al 1991, Jacobsson et al 1993, Niinimäki et al 1994). However, Glassman et al (2001) and Kärrholm et al (2002) presented good results with the Epoch isoelastic stem.…”

Section: Discussionmentioning

confidence: 99%

Periprosthetic proximal bone loss after uncemented hip arthroplasty is related to stem size: DXA measurements in 138 patients followed for 2–7 years

et al. 2006

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Background Periprosthetic bone loss occurs around uncemented femoral stems and may be influenced by the stem size.Patients and methods We studied 138 consecutive patients, 3 (2-7) years on average after a total hip arthroplasty operation (THA) for unilateral osteoarthritis with the Bi-Metric uncemented femoral stem. We analyzed Harris hip score and bone mineral density.Results The mean Harris hip score was 97 at followup. Bone mineral density decreased proximally by 19% in both Gruen zones 1 and 7. Bone loss in zones 1, 2, 6, and 7 was significantly associated with stem size. Distally, a small gain in bone mass was found in zones 3 and 5 for medium femoral sizes.Interpretation We found a marked proximal BMD loss, especially for the larger stems, which may be specific for this particular implant. Long-term studies should reveal whether this proximal bone loss will affect the longevity of the THA.

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In Vivo Measurements of Relative Motion Between an Uncemented Femoral Total Hip Component and the Femur by Roentgen Stereophotogrammetric Analysis

Cited by 56 publications

References 0 publications

Comparison of the uncemented Cone and the cemented Bimetric hip prosthesis in young patients with osteoarthritis: An RSA, clinical and radiographic study

Comparison of the uncemented Cone and the cemented Bimetric hip prosthesis in young patients with osteoarthritis: An RSA, clinical and radiographic study

Aseptic stem loosening in primary THA: migration analysis of cemented and cementless fixation

Periprosthetic proximal bone loss after uncemented hip arthroplasty is related to stem size: DXA measurements in 138 patients followed for 2–7 years

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