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13 records found

Tibial Baseplate Migration Is Not Associated with Change in Patient-Reported Outcome Measures and Clinical Scores after TKA

A Secondary Analysis of 5 Radiostereometric Analysis Studies with 10-Year Follow-up

Background:Radiostereometric analysis (RSA) provides highly accurate data about the migration of a total knee arthroplasty (TKA) component. However, patient-reported outcome measures (PROMs) reflect the patients' perspective of their functional status, pain, and overall health af ...
Background and purpose — Different marker-selection methods are applied to represent implant and tibial seg-ments in radiostereometric analysis (RSA) studies of total knee arthroplasty (TKA). Either a consistent set of markers throughout subsequent RSA examinations (“consistent-m ...
Aims The objective of this study was to compare the two-year migration and clinical outcomes of a new cementless hydroxyapatite (HA)-coated titanium acetabular shell with its previous version, which shared the same geometrical design but a different manufacturing process for appl ...

Continued Stabilization of a Cementless 3D-Printed Total Knee Arthroplasty

Five-Year Results of a Randomized Controlled Trial Using Radiostereometric Analysis

BACKGROUND: Three-dimensional (3D) printing of highly porous orthopaedic implants aims to promote better osseointegration, thus preventing aseptic loosening. However, short-term radiostereometric analysis (RSA) after total knee arthroplasty (TKA) has shown higher initial migratio ...

Late stabilization after initial migration in patients undergoing cemented total knee arthroplasty

A 5-year followup of 2 randomized controlled trials using radiostereometric analysis

Background and purpose — In total knee arthroplasty (TKA), metal-backed (MBT) and all-polyethylene (APT) designs have shown comparable implant migration up to 2 years postoperatively using radiostereometric analysis (RSA). However, studies comparing mid-term migration of both des ...

Risk Factors for Tibial Component Loosening

A Meta-Analysis of Long-Term Follow-up Radiostereometric Analysis Data

BACKGROUND: Radiostereometric analysis (RSA) is a highly accurate tool to detect implant migration and predict loosening following total knee arthroplasty (TKA). However, little is known about the predisposing risk factors for implant migration, nor which migration profile should ...
BACKGROUND: Orthopaedic surgeons aim for mechanical alignment when performing total knee arthroplasty (TKA) as malalignment is associated with loosening. Loosening may be predicted by migration as measured with radiostereometric analysis (RSA), but previous RSA studies on postope ...

Migration of a novel 3D-printed cementless versus a cemented total knee arthroplasty

Two-year results of a randomized controlled trial using radiostereometric analysis

Although bone cement is the primary mode of fixation in total knee arthroplasty (TKA), cementless fixation is gaining interest as it has the potential of achieving lasting biological fixation. By 3D printing an implant, highly porous structures can be manufactured, promoting osse ...

All-polyethylene versus metal-backed posterior stabilized total knee arthroplasty

Similar 2-year results of a randomized radiostereometric analysis study

Background and purpose — The all-polyethylene tibial (APT) component, introduced in the early 1970s, was surpassed by metal-backed tibial (MBT) trays as the first choice for total knee arthroplasty (TKA). With improved polyethylene, the modern APT components can reduce costs, and ...

Marker-based versus model-based radiostereometric analysis of total knee arthroplasty migration

A reanalysis with comparable mean outcomes despite distinct types of measurement error

Background and purpose — Pooling data of studies evaluating total knee arthroplasty migration using radiostereometric analysis (RSA) may be compromised when the RSA method used would influence estimated differences between groups. We therefore reanalyzed a marker-based RSA study ...
Background and purpose — With a rapidly increasing population in need of total knee arthroplasty (TKA), there is renewed interest in cost-saving all-polyethylene designs. Differences between metal-backed and all-polyethylene designs in initial component migration assessed by radi ...

Peri-apatite coating decreases uncemented tibial component migration

Long-term RSA results of a randomized controlled trial and limitations of short-term results

Background and purpose — Biological fixation of uncemented knee prostheses can be improved by applying hydroxyapatite coating around the porous surface via a solution deposition technique called Peri-Apatite (PA). The 2-year results of a randomized controlled trial, evaluating th ...

Fixation and clinical outcome of uncemented peri-apatite-coated versus cemented total knee arthroplasty

Five-year follow-up of a randomised controlled trial , using radiostereometric analysis (RSA)

Aims The optimal method of tibial component fixation remains uncertain in total knee arthroplasty (TKA). Hydroxyapatite coatings have been applied to improve bone ingrowth in uncemented designs, but may only coat the directly accessible surface. As peri-apatite (PA) is solution d ...