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【Classic Case Analysis】 LDK Ortho XU Lateral Unicompartmental Transplant -Reconstruction

Created on 2025.11.27, Updated on 03.26, Published on 03.26

With You, Every Step Of The Way   ——                                   

Recently, Guangshan Xinglin Hospital successfully performed a unicompartmental knee replacement surgery on a patient who had experienced intermittent pain in their left knee for eight years. The patient had experienced intermittent, throbbing pain in their left knee without any obvious cause eight years prior. Initially, the pain was mild and tolerable, but worsened with activity, prompting them to seek treatment at Guangshan Xinglin Hospital. After detailed imaging examinations and a physical examination by Dr. Wang Hui, the hospital's deputy chief physician, the diagnosis revealed unilateral osteoarthritis of the left knee. Faced with this condition, the hospital thoroughly communicated with the patient and their family, explaining the diagnosis and treatment plan in detail. The patient and family agreed to undergo unicompartmental knee replacement surgery.

Description of the condition

The patient is a 57-year-old female.

Chief complaint

Intermittent pain in the left knee for 8 years, worsening in the past year.

Present illness

Eight years ago, the patient developed left knee pain without any obvious cause. The pain was intermittent and throbbing. Initially, it was mild and tolerable, but the pain worsened after activity, especially when going up and down stairs. The patient received simple treatments such as physical therapy, oral medication, and intra-articular injections, which provided intermittent relief. One year ago, the symptoms worsened, and the patient also experienced pain when walking on flat ground.

MRI scan showed

lateral meniscus injury of the left knee joint, tibial plateau cartilage injury with bone marrow edema.

DR showed

the lateral joint space of the left knee was significantly narrowed.

Basic definition of unicompartmental knee arthroplasty (UKA)

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A vivid analogy: If total knee replacement is like "replacing the entire car," then unicompartmental knee replacement is like "only replacing the damaged wheel," preserving all other intact components of the vehicle.Alleviate knee joint pain through minimally invasive intervention

Basic Anatomy of the Knee Joint

The knee joint consists of three functional compartments:

Medial tibiofemoral compartment (the most common site of pathology)
Lateral tibiofemoral compartment
Patellofemoral compartment

Core Surgical Principles

Precision Localization: Preoperative imaging (weight-bearing X-rays, stress views, MRI) confirms pathology is confined to a single compartment.
Minimally Invasive Approach: 6–8 cm incision to minimize soft-tissue disruption.unicompartmental knee arthroplasty
Selective Replacement: Resection of only damaged cartilage and meniscus, replaced with a biomimetic prosthesis.Knee Joint Health Education
Anatomical Preservation: Full retention of cruciate ligaments, collateral ligaments, and healthy compartments.Hans Publishers
Biomechanical Reconstruction: Restoration of normal mechanical alignment and kinematic pathway.www.haoyishu.com

Key Advantages of Unicompartmental Knee Arthroplasty (UKA)

Multiple studies show that most patients who are appropriate candidates for unicompartmental knee replacement have good results with this procedure.

The advantages of partial knee replacement over total knee replacement include:

Minimally Invasive with Rapid Recovery

Surgical incision is only 6–8 cm, significantly smaller than total knee replacementwww.sdey.net
Reduced postoperative pain, shorter hospital stay; most patients can be discharged on the same day or next dayorthoinfo.aaos.org
Faster rehabilitation; majority of patients walk unassisted within 1–2 weeksorthoinfo.aaos.org

Preservation of Native Knee Anatomy

Healthy compartments' cartilage and bone are preserved, along with both cruciate ligamentsPeking Union Medical College Hospital
Better proprioception, more natural kinematics, and typically greater range of flexion compared to total knee arthroplasty

Lower Risk of Complications

Minimal intraoperative blood loss and reduced need for transfusionwww.carewayer.com
Lower incidence of infection, deep vein thrombosis, and other complications compared to total knee replacementorthoinfo.aaos.org

Economic and Long-Term Benefits

Relatively lower surgical cost
10-year survival rate of 90–95% in appropriately selected patientswww.sdey.net
Preserves anatomical foundation for potential future conversion to total knee replacement if needed

Superior Functional Outcomes

Gait pattern closer to normal; better performance in stair climbing, squatting, and daily activitieszhgjwkzz.cma-cmc.com.cn
High patient satisfaction rates reported in clinical studies

Note: The above information is compiled based on current medical guidelines and literature. Specific diagnosis and treatment should be conducted under the guidance of a physician.

Preoperative images

MRI findings of a patient with intermittent left knee pain

Lateral meniscal tear of the left knee with tibial plateau cartilage lesion and associated bone marrow edema

The lateral joint space of the left knee is markedly narrowed, indicating the need for unicompartmental knee arthroplasty (UKA).

MRI findings of a patient with intermittent left knee pain, indicating the need for unicompartmental knee arthroplasty (UKA) with implantation of a unicompartmental knee prosthesis.

Postoperative images

This is the postoperative imaging of a unicompartmental knee arthroplasty (UKA) performed on a patient with intermittent left knee pain. Following implantation of the unicompartmental knee prosthesis, the surgery was successful.

Other Case Studies of Unicompartmental Knee Arthroplasty (UKA) ：

LDK Ortho XU Unicompartmental Knee Arthroplasty

Products used during surgery

LDK Ortho Unicompartmental Knee System

CE Certified

Product advantages:

Multi-radius curve of the femoral condyle provides patients with a better fit;
Extended posterior condyle safely accommodates high flexion;
Inward arc design avoids prepatellar pain;
Low-constrained articular surface less restricts knee motion, allowing freer knee motion;

Unicompartmental knee replacement is less invasive and can preserve the normal structure of the knee joint.

LDK Ortho Unicompartmental Knee System-Unicompartmental knee prosthesis

Beijing LDK Ortho Technology Co., Ltd.  ——                            

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Founded in 1998, Beijing LDK Ortho Technology Co., Ltd., adhering to the principle of "Dedication to High Technology, Benefiting the People," has, after 26 years of innovative development, become a national high-tech enterprise specializing in medical devices, integrating R&D, production, sales, and service, with surgical implants as its main business. It is a leading enterprise in the domestic artificial joint field and an outstanding national brand. The company has successively won awards such as the National Torch Program and the National Innovation Fund, and has been included in the National 13th Five-Year Plan for Key Scientific Research.

The company currently produces and sells over 50,000 artificial joints, and its revenue is projected to exceed 1 billion yuan in the next three years. It strives to become an A-share listed company specializing in artificial joints. In the future, the company will build an integrated technological innovation consortium encompassing production, education, research, and medicine in the field of orthopedic medical devices in Shunyi Airport Area C, making new and greater contributions to the development of orthopedic medical devices in China.