Early Migration Pattern of the Uncemented CLS Stem in Total Hip Arthroplasties

Ström, Håkan; Nilsson, Olle; Milbrink, Jan; Mallmin, Hans; Larsson, Sune

doi:10.1097/01.blo.0000238785.98606.9d

Cited by 55 publications

(61 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…2). This pattern of early migration has been reported previously with other cementless stems; however, there is limited information in the literature regarding a definitive cause for this early migration [20][21][22]. Impaction of the stem during the early postoperative phase may account for this finding of migration limited to the first six months.…”

Section: Discussionsupporting

confidence: 70%

“…Impaction of the stem during the early postoperative phase may account for this finding of migration limited to the first six months. While our study did not evaluate the pattern of subsidence within the first six postoperative months, a previous study of migration in a cementless stem showed the majority of stem subsidence occurs within the first two months with no major stem migration occurring within the first week of implantation [22].…”

Section: Discussionmentioning

confidence: 81%

“…The amount of rotation measured is consistent with reports in the literature from other cementless stems. In their study of early migration of the CLS stem, Ström et al [22] found that stems rotated into retroversion on average 1.79°in patients with unrestricted weight bearing after one year. Almost one third of the patients implanted with the Corail stem experienced more than 2°of stem rotation into retroversion.…”

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Early migration characteristics of a hydroxyapatite-coated femoral stem: an RSA study

Campbell

Mercer

Nilsson

et al. 2009

International Orthopaedics (SICOT)

View full text Add to dashboard Cite

Measurement of early stem subsidence can be used to predict the likelihood of long-term femoral component loosening and clinical failure. Data that examines the early migration pattern of clinically proven stems will provide clinicians with useful baseline data with which to compare new stem designs. This study was performed to evaluate the early migration pattern of a hydroxyapatitecoated press-fit femoral component that has been in use for over ten years. We enrolled 30 patients who underwent THA for osteoarthritis. The median age was 70 years (range, 55-80 years). Patients were clinically assessed using the Harris hip score. Radiostereometric analysis was used to evaluate stem migration at three to four days, six months, one year and two years. We observed a mean subsidence of 0.73 mm at six months, 0.62 mm at one year and 0.58 mm at two years and a mean retroversion of 1.82°at six months, 1.90°at one year and 1.59°at two years. This data suggests that subsidence is confined to the first six months after which there was no further subsidence. The results from this study can be compared with those from novel cementless stem designs to help predict the long-term outcome one may expect from new cementless stem designs.

show abstract

Section: Discussionsupporting

confidence: 70%

Section: Discussionmentioning

confidence: 81%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Early migration characteristics of a hydroxyapatite-coated femoral stem: an RSA study

Campbell

Mercer

Nilsson

et al. 2009

International Orthopaedics (SICOT)

View full text Add to dashboard Cite

show abstract

“…Even in worst-case scenario, the revision rate was acceptable. It was reassuring to find no evidences of osteolysis or loosening which have been reported in some early-term studies of the CLS prosthesis (Genterpulse, Bern, Switzerland), which has a design similar to that of the COREN prosthesis 30) . The COREN acetabular cup also showed good results.…”

Section: Discussionmentioning

confidence: 80%

Minimum Seven-year Follow-up of Cementless Total Hip Arthroplasty with the COREN Hip System

et al. 2013

View full text Add to dashboard Cite

� Purpose:We previously reported results of a mean 3.2-year follow-up of the COREN hip system, which is the first total hip prosthesis developed in Korea. The aim of this prospective study was to update the previous report with regard to the hip function and radiographic implant performance. Materials and Methods: Between 2003 and 2004, a consecutive series of 68 primary, cementless, total hip prostheses (COREN) were implanted in 57 patients(68 hips) and followed up for a minimum of 7 years. Sixtythree of the 68 hips were available for clinical scoring and radiographic analysis. Results: The mean Harris hip and WOMAC scores were improved from 48.1 and 54.7, preoperatively, to 96.4 and 22.1 at the final follow-up. The mean patient activity increased from 3.1, preoperatively, to 8.2 at the final follow-up. All hips showed stable bony ingrowth on the radiographs. No hips showed evidence of osteolysis or prosthesis loosening, and no revision was required during the follow-up. A Periprosthetic fracture (Vancouver type B1) was encountered in one hip 4.7 years after surgery, which was treated by reoperation. Conclusion: This study shows that the COREN hip system produces excellent mid-term results in cementless hip arthroplasty.

show abstract

“…Continuing rapid early migration is said to be predictive of loosening [22]. However, the absolute early migration is different depending on the stem design [6,22,23,29,[34][35][36][37]. We found that early migration, as measured by EBRA-FCA at 2 years postoperatively, can identify uncemented femoral components at risk for aseptic loosening during early and mid-term followup, but did not predict aseptic loosening in the late second and third decades.…”

Section: Discussionmentioning

confidence: 98%

Early Migration Predicts Aseptic Loosening of Cementless Femoral Stems: A Long-term Study

Streit

Haeussler

Brückner

et al. 2016

Clinical Orthopaedics &Amp; Related Research

View full text Add to dashboard Cite

Background Excessive early migration of cemented stems and cups after THA has been associated with poor long-term survival and allows predictable evaluation of implant performance. However, there are few data regarding the relationship between early migration and aseptic loosening of cementless femoral components, and whether early migration might predict late failure has not been evaluated, to our knowledge. Einzel-Bild-Röntgen-Analyse-femoral component analysis (EBRA-FCA) is a validated technique to accurately measure axial femoral stem migration without the need for tantalum markers, can be performed retrospectively, and may be a suitable tool to identify poor performing implants before their widespread use. Questions/purposes We asked: (1) Is axial migration within the first 24 months as assessed by EBRA-FCA greater among cementless stems that develop aseptic loosening than those that remain well fixed through the second decade; (2) what is the diagnostic performance of implant migration at 24 months postoperatively to predict later aseptic loosening of these components; and (3) how does long-term stem survivorship compare between groups with high and low early migration? Methods We evaluated early axial stem migration in 158 cementless THAs using EBRA-FCA. The EBRA-FCA measurements were performed during the first week postoperatively (baseline measurement) and at regular followups of 3, 6, and 12 months postoperatively and annually thereafter. The mean duration of followup was 21 years (range, 18-24 years). The stems studied represented 45% (158 of 354) of the cementless THAs performed during that time, and cementless THAs represented 34% (354 of 1038) of the THA practice during that period. No patient enrolled in this study was lost to followup. Multivariate survivorship analysis using Cox's regression model The institution of one or more of the authors (MRS) has received, during the study period, funding from the noncommercial research fund of Deutsche Arthrose-Hilfe e.V (Frankfurt, Germany). The institution of one or more of the authors (TG) has received, during the study period, funding from Biomet Europe (Berlin, Germany) and from Depuy Orthopädie GmbH (Kirkel, Germany). One of the authors certifies that he (TG), or a member of his immediate family, has or may receive payments or benefits, during the study period, an amount of less than USD 10,000 from Pfizer Pharma GmbH (Karlsruhe, Germany), and an amount of less than USD 10,000 from MSD Sharp&Dohme (Haar, Germany was performed with an endpoint of aseptic loosening of the femoral component. Loosening was defined according to the criteria described by Engh et al. and assessed by two independent observers. Patients with a diagnosis of prosthetic joint infection were excluded. Receiver operating characteristic (ROC) curve analysis was used to evaluate diagnostic performance of axial stem migration 1, 2, 3, and 4 years postoperatively as a predictor of aseptic loosening. Survivorship of hips with high (C 2.7 mm) and low (\ 2.7 mm) migration was co...

show abstract

Early Migration Pattern of the Uncemented CLS Stem in Total Hip Arthroplasties

Cited by 55 publications

References 11 publications

Early migration characteristics of a hydroxyapatite-coated femoral stem: an RSA study

Early migration characteristics of a hydroxyapatite-coated femoral stem: an RSA study

Minimum Seven-year Follow-up of Cementless Total Hip Arthroplasty with the COREN Hip System

Early Migration Predicts Aseptic Loosening of Cementless Femoral Stems: A Long-term Study

Contact Info

Product

Resources

About