The anatomical SP-CL stem demonstrates a non-progressing migration pattern in the first year: a low dose CT-based migration study in 20 patients

Sandberg, Olof; Tholén, Simon; Carlsson, Sofia; Wretenberg, Per

doi:10.1080/17453674.2020.1832294

Cited by 10 publications

(18 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although Sandberg et al. ( 2020 ) previously have shown that CTMA precision can be reproduced by an inexperienced user, it is important to emphasize the importance of CTMA training before the use of this tool.…”

Section: Discussionmentioning

confidence: 98%

Precision of CT-based micromotion analysis is comparable to radiostereometry for early migration measurements in cemented acetabular cups

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Discussionmentioning

confidence: 98%

Precision of CT-based micromotion analysis is comparable to radiostereometry for early migration measurements in cemented acetabular cups

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…Whether these stems are at risk of future clinical loosening remains to be seen. Recently Sandberg et al ( 1 ) used a new CT-based method, Sectra CT Micromotion Analysis (CTMA), to measure subsidence of 20 SP-CL stems up to 1 year after implantation. Their method had about the same precision as observed by us.…”

Section: Discussionmentioning

confidence: 99%

“…The SP-CL stem was first introduced in 2014 but few studies ( 1 , 2 ) have yet been performed to evaluate this stem in a clinical setting. We performed a randomized controlled trial, comparing the SP-CL stem with use of the Corail stem as reference based on its thorough documentation, not least in national registers ( 3 – 6 ).…”

mentioning

confidence: 99%

Similar outcome with a new anteverted or a straight standard stem: a randomized study of 72 total hip arthroplasties evaluated with clinical variables, radiostereometry, and DXA up to 2 years

et al. 2021

View full text Add to dashboard Cite

Background and purpose The anatomical uncemented stem, SP-CL (Static Physiologicus – CementLess), designed to facilitate insertion and to avoid stress concentration at solitary contact points, has been on the market since 2014 but is not well documented. We studied its clinical performance, migration, and associated bone remodeling in a randomized controlled trial, with the Corail stem as control. Patients and methods 79 patients (80 hips) were primarily recruited and 71 patients (72 hips, 36 SP-CL, 36 Corail) attended the last follow-up at 2 years. The Oxford Hip Score (OHS) was the primary outcome. In addition, we assessed stem migration, changes in bone mineral density, and development of radiolucencies by RSA, DXA, and conventional radiography. Results At 2 years Oxford Hip Score was similar between the SP-CL and Corail stem. At 2 years the SP-CL stems showed a median distal migration of 0.23 mm (−0.1 to 5.2) and the Corail stems of 0.11 mm (−0.4 to 4.4). The SP-CL stems showed slightly more loss of bone mineral density in Gruen region 7 (p = 0.003). Interpretation We found no difference in clinical results between the SP-CL and the well-documented Corail stem. The same stem stability was reached between 1 and 2 years postoperatively for both stems. As a next step we think that the SP-CL stem should be studied in a multi-center setting, before being accepted for general use.

show abstract

“…The recently developed low-dose computed tomography-based implant motion analysis has been shown to have an accuracy and a precision on par with RSA; this measuring method (without the need for bone or implant markers and specialized RSA equipment) ”opens up the possibility for simpler implant migration studies”[ 68 - 70 ]. Very exciting technique!…”

Section: Exciting New Technique and Research Suggestionsmentioning

confidence: 99%

Hip prosthetic loosening: A very personal review

Mjöberg¹

2021

WJO

View full text Add to dashboard Cite

Hip prosthetic loosening is often difficult to detect at an early stage, and there has been uncertainty for a long time as to when the loosening occurs and thus to the basic causes. By comparing different diagnostic methods, we found that loosening is best defined as prosthetic migration and measured by radiostereometric analysis. Convincing evidence indicates that poor interlock, poor bone quality, and resorption of a necrotic bone bed may initiate loosening during or shortly after surgery; this forms the basis of the theory of early loosening. Biomechanical factors do affect the subsequent progression of loosening, which may increase subclinically during a long period of time. Eventually, the loosening may be detected on standard radiographs and may be interpreted as late loosening but should to be interpreted as late detection of loosening. The theory of early loosening explains the rapid early migration, the development of periprosthetic osteolysis and granulomas, the causality between wear and loosening, and largely the epidemiology of clinical failure of hip prostheses. Aspects discussed are definition of loosening, the pattern of early migration, the choice of migration threshold, the current understanding of loosening, a less exothermic bone cement, cemented taper-slip stems, a new exciting computed tomography-based technique for simpler implant migration studies, and research suggestions.

show abstract

The anatomical SP-CL stem demonstrates a non-progressing migration pattern in the first year: a low dose CT-based migration study in 20 patients

Abstract: The anatomical SP-CL stem demonstrates a non-progressing migration pattern in the first year: a low dose CT-based migration study in 20 patients, Acta Orthopaedica,

Cited by 10 publications

References 28 publications

Precision of CT-based micromotion analysis is comparable to radiostereometry for early migration measurements in cemented acetabular cups

Precision of CT-based micromotion analysis is comparable to radiostereometry for early migration measurements in cemented acetabular cups

Similar outcome with a new anteverted or a straight standard stem: a randomized study of 72 total hip arthroplasties evaluated with clinical variables, radiostereometry, and DXA up to 2 years

Hip prosthetic loosening: A very personal review

Contact Info

Product

Resources

About