Background: Arthritic knees with Ranawat type-II valgus deformity present with soft tissue contracture and osseous anomalies that make total knee arthroplasty (TKA) difficult. We hypothesized that computer-navigated-TKA (CN-TKA) may be superior to conventional techniques and provide better mid-term radiographic and clinical outcomes in such cases.

Methods: Between January 2002 and January 2009, patients with Ranawat type-II valgus deformity who underwent primary TKA were entered into this retrospective study. Conventional TKA and CN-TKA were compared for the accuracy of component placement, joint line level, and postoperative limb alignment. International Knee Society scores and patellar scores were used for clinical assessment.

Results: A total of 62 patients (70 knees) with a minimum of 5 years of follow-up were studied. Conventional TKA was performed in 36 knees and CN-TKA in 34 knees. A significantly higher rate of lateral retinaculum release was recorded in the conventional TKA group compared to the CN-TKA group. Proper restoration of joint line was achieved using CN-TKA. The range of motion of the knees was similar in both groups preoperative and postoperatively. There were no significant differences in reconstructed mechanical axes, accuracy of component positioning, and difference in perioperative hemoglobin level between the two groups. At a mean follow-up of 6.2 years, both groups had significant postoperative improvements in clinical performance, however the difference did not reach statistical significance between both techniques.

Conclusions: Our findings demonstrate that CN-TKA can properly restored the joint line level for arthritic knees with Ranawat type II valgus deformity. However, no differences in clinical function, limb and component alignment, or survival of the prostheses were noted between the CN-TKA and conventional TKA groups at a mean follow-up of 6.2 years.

Download full-text PDF

Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4258048PMC
http://dx.doi.org/10.1186/1471-2474-15-390DOI Listing

Publication Analysis

Top Keywords

valgus deformity
16
conventional tka
16
ranawat type-ii
12
type-ii valgus
12
total knee
8
knee arthroplasty
8
patients ranawat
8
arthritic knees
8
knees ranawat
8
accuracy component
8

Similar Publications

Background: Untreated cubitus varus results in cosmetic deformity as well as posterolateral rotatory instability at the elbow if longstanding. French osteotomy with its modifications is the most commonly done osteotomy and relies on a medial intact hinge and these osteotomies fail to address the lateral prominence. Intraoperative fixator assistance to adjust the translation and fine tune the osteotomy is a novel method to address the lateral prominence.

View Article and Find Full Text PDF

Purpose: This study reports the relationship between posterior cruciate ligament (PCL) retention vs resection and soft tissue laxity and balance throughout flexion using a robotically controlled ligament tensioner.

Methods: 55 robotic-assisted TKAs (Total knee arthroplasty) were retrospectively reviewe. The robotic ligament tensioner collected laxity data both before and after PCL resection.

View Article and Find Full Text PDF

The purpose of this study was to evaluate the radiographic outcomes of distal chevron metatarsal osteotomy associated with lateral joint capsule split as only lateral soft tissue release in patients with symptomatic moderate and severe hallux valgus (HV) deformity. Ninety patients (103 feet) at our institution between January 2014 and December 2019 were included in the present retrospective study. Each patient was evaluated preoperatively and at final follow-up by means of weight bearing radiographs lateral and dorsoplantar views.

View Article and Find Full Text PDF

Research progress in the etiology and minimally invasive therapy of hallux valgus.

Surgeon

January 2025

Department of Arthritis, Affiliated Hospital of Shandong Second Medical University, 2428 Yuhe Road, Kuiwen District, Weifang City, Shandong Province, 261031, PR China. Electronic address:

Hallux valgus (HV) is the most common foot deformity. It has various pathogenic factors that make its pathogenesis challenging to understand. As the disease progresses, patients experience amplified pain and decreased activities, significantly affecting their quality of life.

View Article and Find Full Text PDF

Introduction: Knee alignment significantly impacts the outcome of total knee arthroplasty (TKA). Understanding patient perceptions of their knee alignment in relation to objective measurements is essential to ensure optimal surgical outcomes and to meet patients' expectations. This study reports patients' perception of pre- and postoperative knee alignment in relation to radiographic alignment measurements.

View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!