Faculty Collaboration Database

Radiostereometric and Radiographic Analysis of Glenoid Component Motion After Total Shoulder Arthroplasty. Orthopedics 2015 Oct;38(10):e891-7

Date

10/22/2015

Pubmed ID

26488784

DOI

10.3928/01477447-20151002-56

Scopus ID

2-s2.0-84944267489 (requires institutional sign-in at Scopus site)   12 Citations

Abstract

Aseptic glenoid component loosening is a common cause of total shoulder arthroplasty (TSA) failure, but early detection is difficult because pain often appears late and radiolucent lines are of uncertain significance. This study sought to answer the following questions: (1) What types of glenoid component motion may be observed during the first 3 years following implantation?; (2) Is the appearance of radiolucent lines around the glenoid component a reliable indicator of component motion?; and (3) Are clinical outcomes correlated with early glenoid component motion within the first 3 years after TSA? Eleven patients (mean age, 60.6 years) underwent TSA using a cemented, all-polyethylene glenoid component with tantalum bead implantation. Clinical outcomes (American Shoulder and Elbow Surgeons [ASES] score, visual analog scale [VAS] pain score, and range of motion) were compared pre- and postoperatively, and radiolucencies were graded according to the criteria of Lazarus et al. Patients were evaluated using radiostereometric analysis at 6 months and 1, 2, and 3 years postoperatively to measure component micromotion in translation and rotation. At a mean follow-up of 50.2 months, mean ASES score had improved from 30.3 to 81.3 (P<.001), mean VAS pain score had improved from 8 to 1 (P<.001), active forward flexion had improved from 109° to 155° (P=.001), active external rotation had improved from 28° to 54° (P=.003), and internal rotation had improved from the level of the sacrum to L3 (P=.002). Radiolucencies were detected around none of the components at 1 year, 6 components at 2 years, and 5 components at 3 years, and these radiolucencies were mostly found around components that experienced high levels of rotational motion.

Author List

Streit JJ, Shishani Y, Greene ME, Nebergall AK, Wanner JP, Bragdon CR, Malchau H, Gobezie R

Author

John P. Wanner MD Assistant Professor in the Orthopaedic Surgery department at Medical College of Wisconsin

MESH terms used to index this publication - Major topics in bold

Aged
Aged, 80 and over
Arthroplasty, Replacement
Female
Humans
Male
Middle Aged
Osteoarthritis
Pain
Polyethylene
Prospective Studies
Prosthesis Failure
Radiostereometric Analysis
Range of Motion, Articular
Scapula
Shoulder Joint
Tantalum