The Results of Oxford Unicompartmental Knee Arthroplasty in Patients With and Without Preoperative Genu Recurvatum

The purpose of this study is to explore the effects of the Oxford unicompartmental knee arthroplasty on two groups of patients, namely one with genu recurvatum before the procedure and one without. Specifically, this study compare the number of occurrences of postoperative genu recurvatum and the postoperative hyperextension angles among the patients. Additionally, the knee scores, the pain scores, and the functional scores for the two groups of patients are compared.

Materials and methods: This study prospectively followed 104 patients (114 knees) who had been treated with cemented minimally invasive surgery unicompartmental knee arthroplasty and had had a minimum of 24 months of follow-up. The patients were divided into two groups: those without preoperative genu recurvatum (85 patients; 94 knees) and those with preoperative genu recurvatum (19 patients; 20 knees). The incidence of the postoperative genu recurvatum, the postoperative hyperextension angles, the knee scores, the pain scores, and the functional scores were recorded and compared between two groups..

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Key information

Conditions

Primary Gonarthrosis Genu Recurvatum

Age range

40 year–90 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

About this study

The patients in both groups were applied with cemented Oxford unicompartmental knee arthroplasty with the same surgeon. The all patients were performed surgery with minimally invasive surgery technique. The gender, site, range of motion, alignment of prosthesis, operative time, blood loss, and posterior slope of tibial component also were recorded and compared between two groups. The incidence of postoperative genu recurvatum, gender, and site were computed using Fisher's exact test. The hyperextension angle, knee score, pain score, functional score,range of motion, alignment of prosthesis, posterior slope of tibial component, operative time, and blood loss were compared with student t-test.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

The medial OA knee with older than 40 years of age, ROM greater than 90°, varus deformity less than 25°, and flexion contractures less than 20°

Exclusion criteria

patients who were diagnosed spontaneous osteonecrosis of knee (SPONK), patients with intraoperative ACL insufficiency, post traumatic arthritis, gouty arthritis, inflammatory joints.

Treatment and study plan

Oxford unicompartmental knee arthroplasty

Device

The Oxford unicompartmental knee arthroplasty was applied in all patients with medial osteoarthritis knee.The Oxford unicompartmental knee arthroplasty is mobile bearing unicompartmental knee arthroplasty.

Primary outcomes

hyperextension angle, the incidence of postoperative genu recurvatum

Time frame: 2 years

hyperextension angle, the incidence of postoperative genu recurvatum

Sponsors and collaborators

Lead sponsor

Thammasat University

Other

Registry information

Official study title

Department of Orthopaedics Faculty of Medicine Thammasat University Thailand

Important dates

Study start: 2011
Primary completion: 2013
Study completion: 2015
First posted: Aug 3, 2016
Registry last updated: Jun 4, 2020

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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