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Review
. 2017 Oct 31:11:1173-1178.
doi: 10.2174/1874325001711011173. eCollection 2017.

Midterm Results of Cementless and Cemented Unicondylar Knee Arthroplasty with Mobile Meniscal Bearing: A Prospective Cohort Study

Radosław Stempin  1 , Wiesław Kaczmarek  1 , Kacper Stempin  2 , Julian Dutka  3
Affiliations
Review

Midterm Results of Cementless and Cemented Unicondylar Knee Arthroplasty with Mobile Meniscal Bearing: A Prospective Cohort Study

Radosław Stempin et al. Open Orthop J. .

Abstract

Background: Cemented unicompartmental knee arthroplasty (UKA) yields good clinical outcome but common revision reasons are loosening and pain. Cementless UKA may reduce the revision rate.

Objective: The current study was designed to assess clinical and radiographic outcome of cemented and cementless UKA, using bone quality as determined by the Bone Hardness Test (BHT) as selection criterion for cementless implantation.

Methods: In this prospective comparative cohort study we analyzed 50 cementless and 29 Oxford consecutive UKA cases. Patients with sufficient bone quality were eligible for cementless UKA. Bone quality was assessed with the BHT, which consisted of exercising pressure with the thumb on the bone surface created after resection of the tibia.

Results: The average surgical times were 62.5 ± 12.6 and 78 ± 16 minutes in the cementless and the cemented group, respectively (p < 0.01). The average thickness of the polyethylene insert was 4.3 ± 1.2 (range, 3 - 9) and 3.7 ± 0.8 (range, 3 - 6) mm, respectively (p = 0.02). Both types of implants yielded excellent clinical and functional results. At an average follow-up time of seven years, we found non-significant differences between clinical results of cementless versus cemented implants.

Conclusion: Shorter surgical time makes cementless implantation more attractive to surgeons when considering UKA options for their patients. The average thickness of the polyethylene insert in cementless group was 0.6 mm thinner than in the cemented group. The BHT is a simple and useful test to assess whether patients are eligible for cementless UKA.

Keywords: Bone hardness test; Clinical outcome; Cohort study; Implant fixation; Mobile meniscal bearing; Osteoarthritis; Unicompartmental knee arthroplasty; knee.

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References

    1. Goodfellow J.W., Kershaw C.J., Benson M.K., O’Connor J.J. The Oxford Knee for unicompartmental osteoarthritis. The first 103 cases. J. Bone Joint Surg. Br. 1988;70(5):692–701. - PubMed
    1. Goodfellow J.W., Tibrewal S.B., Sherman K.P., O’Connor J.J. Unicompartmental Oxford Meniscal knee arthroplasty. J. Arthroplasty. 1987;2(1):1–9. doi: 10.1016/S0883-5403(87)80025-6. - DOI - PubMed
    1. Argenson J.N., O’Connor J.J. Polyethylene wear in meniscal knee replacement. A one to nine-year retrieval analysis of the Oxford knee. J. Bone Joint Surg. Br. 1992;74(2):228–232. - PubMed
    1. Psychoyios V., Crawford R.W., O’Connor J.J., Murray D.W. Wear of congruent meniscal bearings in unicompartmental knee arthroplasty: a retrieval study of 16 specimens. J. Bone Joint Surg. Br. 1998;80(6):976–982. doi: 10.1302/0301-620X.80B6.8176. - DOI - PubMed
    1. Murray D.W. Mobile bearing unicompartmental knee replacement. Orthopedics. 2005;28(9):985–987. - PubMed

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