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All-polyethylene vs...
All-polyethylene vs. metal-backed tibial component in total knee arthroplasty-a randomized RSA study comparing early fixation of horizontally and completely cemented tibial components: part 1. Horizontally cemented components: AP better fixated than MB
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Hyldahl, H. (author)
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- Regnér, Lars, 1955 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för de kirurgiska disciplinerna, Avdelningen för ortopedi,Institute of Surgical Sciences, Department of Orthopaedics
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- Carlsson, Lars, 1952 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för de kirurgiska disciplinerna, Avdelningen för ortopedi,Institute of Surgical Sciences, Department of Orthopaedics
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- Kärrholm, Johan, 1951 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för de kirurgiska disciplinerna, Avdelningen för ortopedi,Institute of Surgical Sciences, Department of Orthopaedics
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- Weidenhielm, L. (author)
- Karolinska Institutet
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(creator_code:org_t)
- Medical Journals Sweden AB, 2005
- 2005
- English.
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In: Acta Orthop. - : Medical Journals Sweden AB. - 1745-3674 .- 1745-3682. ; 76:6, s. 769-77
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Abstract
Subject headings
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- BACKGROUND: Controversy still exists as to whether to mount the tibial bearing on a metal baseplate or not. Furthermore, the tibial component can be either horizontally or completely cemented. We evaluated metal backing versus all-polyethylene using horizontal cementing technique. PATIENTS AND METHODS: We randomized 40 patients with knee arthrosis (40 knees) to 2 groups: cemented total knee arthroplasty (AGC, Biomet) using either all-polyethylene (AP) or metal-backed (MB) tibial components (n = 20 for each group). All tibial implants had a total thickness of 8 mm. We used proximal cement-ing, including only the horizontal part of the tibia with avoidance of the stem-bone interface. RESULTS: The positioning of the implants, as judged by the HKA angle, showed an average neutral alignment in both groups. Preoperatively and after 2 years, there was no statistically significant difference between the HSS scores in both groups (p = 0.6 and 0.4). After 2 years, the metal-backed components had rotated more around the longitudinal axis, median 0.5 degrees vs. 0.2 degrees (internal or external rotation, p = 0.002), and showed increased maximum total point motion, median 1.0 vs. 0.4 mm (maximum migration or MTPM, p = 0.003). INTERPRETATION: Our study indicates that better fixation can be obtained with the all-polyethylene design if proximally cemented thin components are used.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Kirurgi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Surgery (hsv//eng)
Keyword
- Aged
- *Arthroplasty
- Replacement
- Knee/instrumentation/methods
- Bone Cements
- Cementation
- Female
- Humans
- Knee Joint/radiography
- *Knee Prosthesis
- Male
- Metals
- Middle Aged
- Osteoarthritis
- Knee/surgery
- Polyethylenes
- Prosthesis Design
- Range of Motion
- Articular
- *Tibia
- Treatment Outcome
Publication and Content Type
- ref (subject category)
- art (subject category)
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