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KMID : 1144520190310030003
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Knee Surgery & Related Research
2019 Volume.31 No. 3 p.3 ~ p.3
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Early functional outcomes after condylar-stabilizing (deep-dish) versus standard bearing surface for cruciate-retaining total knee arthroplasty
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Stirling P.
Clement N. D.
MacDonald D.
Patton J. T.
Burnett R.
Macpherson G. J.
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Abstract
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Aims: The primary study aim was to compare early knee-specific function of patients undergoing cemented total knee arthroplasty (TKA) with either a cruciate-retaining (CR) polyethylene insert or a highly congruent condylar-stabilizing (CS) insert. Secondary aims were to compare general health and satisfaction between the groups.
Methods: A total of 418 consecutive primary TKAs were identified retrospectively. Demographics and preoperative and 1-year postoperative patient-reported outcome measures (PROMs) were collected prospectively. PROMs consisted of Oxford Knee Scores, EuroQol-5 Dimensions scores, and Short Form-12 scores.
Results: A total of 54 (12.9%) patients received a CS insert and 364 patients received a CR TKA. The CS group had a significantly (odds ratio (OR) 2.9; p?=?0.002) greater proportion of females (77.8% versus 54.9%). The only significant difference in postoperative PROMs was a higher Short Form-12 physical component score in the CR group (difference 3.1; 95% confidence interval (CI) 0.1 to 6.1; p?=?0.04). Linear regression analysis demonstrated no significant difference for all postoperative PROMs (p?>?0.25). There was no significant difference in satisfaction rate (OR 0.94; 95% CI 0.42 to 2.12; p?=?0.56) or pain visual analogue score (difference 6.1; 95% CI ?1.9 to 14.0; p?=?0.14) between the groups.
Conclusion: More congruent CS inserts have equivalent PROMs and patient satisfaction at 1 year compared with less congruent CR inserts. These represent an option for surgeons undertaking TKA where increased congruency is desired.
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KEYWORD
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Total knee arthroplasty, Outcome, Bearing surface, Deep dish, Cruciate retaining
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