Cemented or cementless total knee arthroplasty? - Comparative results of 200 cases at a minimum follow-up of 11 years

Jean-Louis Prudhon, Régis Verdier, Jean-Louis Prudhon, Régis Verdier

Abstract

Introduction: Since 1996 we have been using cementless fixation with hydroxyapatite (HA) coating. The purpose of this paper is to compare survivorship of a series of 100 cemented Total Knee Arthroplasty (TKA) to a similar series of 100 cementless with a follow up of 11-16 years. Material methods: Both TKA are mobile bearing total knee postero-stabilized. They can be used with cement or without cement. Among 1030 New Wave TKATM implanted from 2002 to 2015 we have identified 100 cemented TKAs and 100 cementless TKAs. All these cases were primary replacement. Differences in survival probability were determined using log-rank test.

Results: Survival probabilities at 11 years of follow-up were: Cemented group: 90.2% CI95% [81.9-94.8]; Cementless group: 95.4% CI95% [88.1-98.2]. Comparison between both group showed significant difference, p = 0.32.

Discussion: The advantages of cementless TKA are bone stock preservation, cement debris protection and the potential to achieve biologic fixation. Cementless implants rely on a porous or roughened surface to facilitate bone formation. HA has been shown to accelerate bone integration and to decrease micro motion of the components and to increase fixation. With a survival probability of 90.2% (cemented version) and 95.4% (cementless version), this total knee prosthesis performs as intended in primary total knee arthroplasty. No statistical differences could be found between cemented and cementless implants.

© The Authors, published by EDP Sciences, 2017.

Figures

Figure 1.
Figure 1.
New Wave TKATM implant design, HA coating in cementless version.
Figure 1.
Figure 1.
New Wave TKATM implant design, HA coating in cementless version.
Figure 2.
Figure 2.
New Wave TKATM implant features.
Figure 2.
Figure 2.
New Wave TKATM implant features.
Figure 3.
Figure 3.
New Wave TKATM patellofemoral joint.
Figure 3.
Figure 3.
New Wave TKATM patellofemoral joint.
Figure 4.
Figure 4.
Flow chart of the cases selection.
Figure 4.
Figure 4.
Flow chart of the cases selection.
Figure 5.
Figure 5.
Survival curve.
Figure 5.
Figure 5.
Survival curve.

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Source: PubMed

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