Back to Search
Start Over
Knee arthroplasty with a medially conforming ball-and-socket tibiofemoral articulation provides better function.
- Source :
-
Clinical orthopaedics and related research [Clin Orthop Relat Res] 2011 Jan; Vol. 469 (1), pp. 55-63. - Publication Year :
- 2011
-
Abstract
- Background: A knee design with a ball-and-socket articulation of the medial compartment has a femoral rollback profile similar to the native knee. Compared to a conventional, posterior-stabilized knee design, it provides AP stability throughout the entire ROM. However, it is unclear whether this design difference translates to clinical and functional improvement.<br />Questions/purposes: We asked whether the medially conforming ball-and-socket design differences would be associated with (1) improved ROM; and (2) improved American Knee Society, WOMAC, Oxford Knee, SF-36, and Total Knee Function Questionnaire scores compared to a conventional, fixed-bearing posterior-stabilized TKA.<br />Patients and Methods: We enrolled 82 patients in a single-center, single-blinded, randomized, controlled trial comparing the medially conforming ball-and-socket design knee prosthesis to a posterior-stabilized total knee prosthesis. Our primary end point was ROM. Our secondary end points were American Knee Society, WOMAC, Oxford Knee, SF-36, and Total Knee Function Questionnaire scores. All patients were followed at 1 and 2 years.<br />Results: The mean ROM was 100.1° and 114.9° in the posterior-stabilized and medially conforming ball-and-socket groups, respectively. The physical component scores of SF-36 and Total Knee Function Questionnaire were better in the medially conforming ball-and-socket group. We found no difference in American Knee Society, WOMAC, and Oxford Knee scores.<br />Conclusions: Both implant designs similarly relieved pain and improved function. The medially conforming ball-and-socket articulation provided better high-end function as reflected by the Total Knee Function Questionnaire.<br />Level of Evidence: Level I, therapeutic study. See Guidelines for Authors for a complete description of levels of evidence.
- Subjects :
- Activities of Daily Living
Adult
Aged
Aged, 80 and over
Arthroplasty, Replacement, Knee adverse effects
Biomechanical Phenomena
England
Female
Humans
Knee Joint diagnostic imaging
Knee Joint physiopathology
Male
Middle Aged
Pain Measurement
Pain, Postoperative etiology
Pain, Postoperative prevention & control
Prospective Studies
Prosthesis Design
Radiography
Range of Motion, Articular
Recovery of Function
Single-Blind Method
Surveys and Questionnaires
Time Factors
Treatment Outcome
Arthroplasty, Replacement, Knee instrumentation
Knee Joint surgery
Knee Prosthesis
Subjects
Details
- Language :
- English
- ISSN :
- 1528-1132
- Volume :
- 469
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- Clinical orthopaedics and related research
- Publication Type :
- Academic Journal
- Accession number :
- 20700674
- Full Text :
- https://doi.org/10.1007/s11999-010-1493-3