A Comprehensive Guide to Choosing Femoral Stem

The core content of this article is to introduce the definition, function, types of femoral stem and its application in different surgical scenarios and purchasing advantages. The following is a brief overview of these core contents: Definition and function of femoral stem, Types of femoral stem, Purchase advantages.

Through product diversity, size diversity, material and surface treatment advantages, design features, wide range of clinical applications, stability and functional recovery, purchasers can fully understand the characteristics and advantages of different femoral stems, so as to make more informed purchasing decisions and improve surgical results and patient satisfaction.

Definition of femoral stem

The femoral stem is part of the hip prosthesis, mainly used to replace the damaged femoral head and neck. It is usually made of biocompatible materials such as titanium alloy, cobalt-chromium-molybdenum alloy, etc., and the surface may be coated to promote the combination with human tissue. The design of the femoral stem is aimed at transmitting human load, realizing lower limb movement, and improving the patient's activity ability and quality of life.

Main functions of femoral stem in artificial hip joint

The main functions of femoral stem in artificial hip joint include the following points:

1. Replace damaged femur: The femoral stem is used to replace the damaged part of the femur, and it is implanted with the corresponding accessories through artificial hip replacement surgery, so as to eliminate hip pain and restore the activity function of the hip joint.

1. Realize joint movement: The head of the femoral stem forms a rotation with the acetabulum or the prosthetic metal cup to realize the flexion and extension and movement of the femur.

1. Provide stability: The femoral stem is inserted into the femoral medullary cavity and fixed by bone cement or non-bone cement technology to provide joint stability.

1. Transfer load: The femoral stem is designed to transfer body weight and exercise load, reduce joint wear and pain.

These functions together ensure that the artificial hip joint can simulate the movement and load transfer ability of the natural hip joint, thereby improving the quality of life of patients.

Types of femoral stem include:

AK-MP-TP femoral stem

AK-CL-TH femoral stem

ACP and ACP LongCemented femoral stem

AK-THS Tumor Femoral Stem

AK-MP-TP femoral stem is mainly used in the following scenarios:

1. Total Hip Arthroplasty (THA):

  - Used for the treatment of hip joint diseases such as osteoarthritis, rheumatoid arthritis, necrosis of the femoral head.

  - For patients who need to replace the whole hip joint, including the acetabulum and femur part. 2.

2. Hip revision surgery:

  - For patients who have failed or have complications (e.g. loosening, infection, etc.) after initial hip replacement.

  - The original femoral stem needs to be replaced or repaired.

3. Post-traumatic hip reconstruction:

  - Used to treat hip injuries or fractures caused by trauma.

  - It is needed to rebuild the structure and function of the hip joint.

The purchasing advantages of AK-MP-TP femoral stem include the following aspects:

1. Variety of sizes:

  - Provide a variety of size options (from 7# to 14#), which can meet the needs of patients with different anatomical structures, and improve the matching and surgical success rate.

2. Material Advantage:

  - Made of high-strength forged titanium alloy material with good biocompatibility and mechanical properties, which can provide long-term stability.

3. Surface treatment:

  - The proximal surface adopts plasma spraying technology, which enhances the bone growing-in ability and improves the long-term stability of the implant.

  - The distal surface is sandblasted to provide optimal initial and rotational stability.

4. Design Features:

  - Polished neck design reduces abrasion and debris generation, reducing the risk of post-operative complications.

  - The bullet-shaped distal end design reduces postoperative pain and improves patient comfort.

5. Initial Stability:

  - The anatomical medial curvature of the proximal end and the 3-degree biplane tapered design provide excellent initial stability and reduce the risk of postoperative loosening.

6. Wide clinical application:

  - It is suitable for a variety of scenarios such as total hip arthroplasty and hip revision surgery, and has high clinical application value.

AK-CL-TH femoral stem usage scenarios

 Hip replacement surgery:

  - For patients requiring hip replacement surgery.

  - It is particularly suitable for anterior approach techniques, as its low-profile lateral shoulder design facilitates insertion during minimally invasive surgery.

AK-CL-TH femoral stem purchasing advantages

1. Mechanical stability:

  - Provide primary mechanical stability with good filler effect to ensure postoperative joint stability.

2. Easy insertion:

  - The low-profile lateral shoulder design makes insertion easy in minimally invasive procedures, especially anterior approach procedures.

3. Dual coating design:

  - The dual-coating design (50μm pure titanium and 150μm hydroxyapatite coating) improves biocompatibility and osseointegration.

4. Material properties:

  - Made of forged titanium alloy (Ti-6Al-4V) with high fatigue strength and biocompatibility to ensure product durability and safety.

5. Design Advantages:

  - Bi-conical trapezoidal design resists axial and torsional displacement and provides excellent stability.

  - The epiphyseal expansion design ensures maximum fixation and load transfer to the proximal femur, reducing the risk of postoperative complications.

6. Variety of sizes:

  - A variety of size options (from 2# to 11#) are available to meet the needs of different patients.

With these features, the AK-CL-TH Femoral Stem is able to provide reliable support for hip replacement surgeries and help improve surgical success and patient satisfaction.

ACP and ACP LongCemented femoral stem usage scenarios

1. Hip Replacement Surgery:

 The ACP and ACP LongCemented Femoral Stems are primarily used in hip replacement surgery to replace the damaged portion of the femoral head.

2. Situations requiring cemented fixation:

These stems are designed to be used in conjunction with bone cement for surgical scenarios requiring cemented fixation.

ACP and ACP LongCemented femoral stem purchasing advantages

1. Design advantages:

  - Bi-Tapered Design: provides natural compression to ensure that the implant is securely held and fit within the cemented sleeve.

  - Polished surface: Combined with tapered geometry, enhances shank stability.

  - Collarless design: simplifies length adjustment.

  - Controlled subsidence: stabilises the implant over a period of 12 to 24 months by controlling subsidence.

2. Material and surface treatment:

  - Material: Co-Cr-Mo material with good biocompatibility and mechanical properties.

  - Surface treatment: Highly polished surface to optimise the transfer of compression forces and reduce shear.

3. Size Versatility:

 A wide range of size options are available, including 00#, 0#, 1#, 2#, 3# for ACP femoral stems and 4#(M), 5#(L), 14#(XS), 15#(S) for ACP LongCemented femoral stems, to meet the needs of different patients.

4. Stability:

Stability and long term performance of the implant in the cemented socket is ensured by the double taper design and polished surface.

These advantages make ACP and ACP LongCemented Femoral Stem have high application value and purchase attraction in hip replacement surgery.

AK-THS Tumor Femoral Stem usage scenarios

1. Reconstruction after tumour resection:

for patients requiring reconstruction after proximal femoral tumour resection.

2. Complex Fracture Repair:

 for complex proximal femur fracture repair, especially when a customised solution is required.

3. Bone Defect Repair:

for repair of bone defects in the proximal femur due to various reasons (e.g. tumour resection, severe trauma, etc.).

AK-THS Tumor Femoral Stem purchasing advantages

1. Material advantages:

  - High-standard titanium alloy: excellent biocompatibility and elastic modulus close to that of bone, reduces stress shielding effect and improves long-term stability.

  - Vacuum plasma pure titanium coating: promotes long-term adhesion to soft tissue and helps restore muscle function.

2. Design advantages:

  - Tapered locking design: securely locks components together to improve overall stability.

  - Various sizes of extension rods: Provide more choices for precise intraoperative matching and assembly to meet individual needs.

3. Functional recovery:

  - Tendon suture hole design: Helps to restore muscle function after surgery, improving the patient's quality of life.

4. Surgical Flexibility:

  - Intraoperative free assembly: Provides more flexibility in surgical operation, which is easy for the surgeon to adjust according to the actual situation.

Conclusion

This article describes the definition, function, and types of femoral stems and presents the advantages of purchasing them in terms of size variety, materials, surface treatment technologies, and design features. Purchasers can gain a comprehensive understanding of the features and advantages of different femoral stems to make more informed purchasing decisions and improve surgical outcomes and patient satisfaction.