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.
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http://dx.doi.org/10.1186/1471-2474-15-390 | DOI Listing |
Indian J Orthop
February 2025
Government Medical College and Hospital, Chandigarh, India.
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 PDFInt Orthop
January 2025
University of Lille, 42 rue Paul Duez, 59000, Lille, Nord, France.
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.
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View Article and Find Full Text PDFSurgeon
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 PDFArch Orthop Trauma Surg
January 2025
Adult Reconstruction and Joint Replacement Service, Hospital for Special Surgery, New York, USA.
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 PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!