Publications by authors named "Patrik Markusson"
Article Synopsis
- There is debate regarding whether measuring polyethylene penetration in hip prostheses while supine underestimates the actual penetration compared to weight-bearing measurements.
- A study involving 111 patients used radiostereometric analysis (RSA) to compare penetration measurements in both positions, finding a mean penetration of 0.68 mm supine and 0.70 mm weight-bearing, with a strong correlation (0.99).
- The results suggest that the slight difference in penetration values between the two positions is not clinically or methodologically significant.
Background: The designs of total ankle prostheses have changed in recent years in order to give better performance. Only a few studies of these ankle prostheses have been published, however, and none on micromotion.
Patients And Methods: We evaluated 5 patients with rheumatoid arthritis and 5 with osteoarthrosis, 4 (3-5) years after arthroplasty with the double-coated STAR prosthesis.
Background: In vivo measurement of wear in the ball and socket articulation of total hip arthroplasties is of interest in the evaluation of both existing and new implants. Controversy reigns regarding the accuracy of different radiological measurement techniques and in particular how accuracy has been assessed.
Material And Methods: We assessed the accuracy of 2 radiostereometric (RSA) techniques for wear measurement and 3 standard radiographic techniques, namely Imagika (image analyzing software), Imagika corrected for head center displacement, and the Charnley Duo method.