Bipolar cemenless

Types of cementless bipolar prosthesis

A cementless bipola is an artificial joint replacement in the hip area that has a ball-and-socket design. The body of this product has a unique coating that allows the bone to grow toward it for better support. That way, there won't be any need for cement or adhesive to secure the implant in the body. It works best for older patients who have severe arthritis in the hip area and have already tried other treatment options without any improvement. There are two types of cementless bipodal prostheses:

• Cementless with metal on metal articulation

  In a metal-on-metal design, the socket and ball of the hip joint are both made of metal. The materials used to make them are cobalt, chromium, molybdenum alloy, and titanium with a porous coating. This allows bone tissue to grow toward the implant. The metal used is very strong and can withstand wear and tear over time. It will last for a long time without needing to be replaced. A lubricant is used to reduce friction when the metal parts move against each other. The lubricant is either a serum produced by the body or a chemical fluid with low viscosity that fills the joint. The implants have a long life span, but there have been complaints about noise when the joint is moving. The noise is caused by the metal surfaces rubbing against each other. It doesn't affect the performance of the joint, and some patients request a psychological therapy to calm their mind about the noise.

• Cementless with ceramic on ceramic articulation

  This type of implant has a ceramic ball and socket. The materials used to make them are alumina oxide and zirconia. They are very strong and resistant to wear. The ball fits into the socket very precisely, leaving no room for any particles to escape. This is a major advantage over the metal-on-metal design, which may produce noise when the joint moves. The ceramic-on-ceramic joint doesn't need any lubricant to reduce friction. The materials are so smooth that they don't create much friction when they move against each other. However, it requires a lot of precise measurement during the surgery to ensure the fit is perfect. Another benefit of this type of implant is that the materials used to make them don't release any metal ions into the body, which can cause damage to surrounding tissues. The body will not have any foreign material to remove if the patient needs a revision surgery. The ceramic-on-ceramic implant can be used with a robotic arm that will guide the surgeon during the procedure. The robot will use the data from the CT scan to create a 3D model of the patient's hip, and it will be very accurate.

How to choose biphasic cementless

• Consider the patient's bone quality

  The bone quality of the patient is an important factor in choosing a biphasic cementless implant. If the bone is weak or has osteoporosis, an implant with a rougher surface can help it attach better to the bone over time. This is because a rougher surface allows for better bone growth and fixation to the implant. On the other hand, if the patient's bones are strong, a smoother implant surface is often used. This is because, in patients with strong bones, the implant can achieve good fixation even without the need for bone growth into the implant surface.

• Look at the size and shape of the bones

  The size and shape of the bones where the implant will go are also important. If the bones are small, a smaller implant is needed so it can fit properly in the body. Using an implant that is too big for small bones can cause problems and not work correctly. In bones that are larger, a larger implant is required to properly fill the space between the two bone pieces. Using an implant that is too small for large bones can also cause issues. Getting the right-sized implant is key for everything to function correctly.

• Think about the kind of activity the patient does

  The activity level of the patient is important to consider. Patients who are very active or do a lot of high-impact activities may need a special type of implant that is designed to withstand greater forces and impacts without wearing down over time. Patients who are less active may have more implant options available to them since the regular implants do not experience as much stress. It is important to choose an implant that will hold up well based on how the patient uses their body.

• Consider the patient's weight

  The weight of the patient is another important thing to think about. Heavier patients put more stress on the implants, so it is important to choose an implant made from strong materials that can handle the extra pressure without breaking down over time. Lighter patients are not as hard on the implants, so they have more material options available to them since the implants do not experience as much wear and tear.

• Look at the patient's activity level

  The activity level of the patient needs to be considered. Patients who are very active may need an implant designed for high-impact use that will hold up well under lots of movement. Less active patients have more implant options since they do not put as much stress on the implants. Choosing an implant that is a good match for the patient's activity level is important.

How to use, install, and product safety

• How to use

  It is essential to follow the doctor's instructions when taking a cementless bipolar hip replacement. The new joint will take time to heal, so the patient must follow a specific plan to recover well. Physical therapists and nurses will help create a daily routine. This may include gentle movements like walking with crutches or a walker for short distances at first. Over days and weeks, the patient will gradually increase the distance walked as strength returns to the leg muscles. Special exercises will also be done at home to improve the new hip joint's flexibility and stability. Attending regular physical therapy sessions is vital for guided practice using the new joint in everyday activities like climbing stairs, getting in and out of the car, and bending down to pick things up. Following this schedule of activity and rest will allow the new joint to bond properly with the body over several months.

• Product Safety

  Safety is the main goal when having a cementless bipolar hip replacement. The new joint needs time to attach securely to the bones, so avoiding certain movements is important. Activities that put too much weight or strain on the hip should be skipped during recovery. This could include lifting heavy objects, bending the leg in certain ways, or twisting the body. Following these restrictions is vital so the new joint doesn't loosen or move out of place. Taking pain medicine as needed helps manage any discomfort from the surgery. Attending all follow-up appointments is essential for the doctor to check the healing. Calling the surgeon right away if problems like swelling, redness, or trouble moving the leg occur is also important. Questions

Functions, features, and design of bipolar cementless

Functions

Bipolar cementless prosthesis has many functions that help improve the quality of life for people with hip joint problems. They can:

• Range of motion: The prosthesis allows the patient to perform daily activities like walking, climbing stairs, and more with minimal pain and discomfort.
• Joint stability: The implant provides excellent joint stability and helps restore the natural movement of the hip joint.
• Durability: It is a long-lasting solution for hip joint problems.
• Infection risk: Being a cementless implant, it reduces the risk of infection during surgery.

Features

• Durability: This prosthesis is designed for long-term use. It is made from materials that can withstand wear and tear over time.
• Range of motion: This prosthesis mimics the natural movement of the hip joint. It allows the patient to move the legs in different directions without restrictions.
• Joint stability: The prosthesis provides joint stability. It holds the joint in the correct anatomical position to prevent dislocation during physical activities.
• Reduced risk of infection: Cement is not used during the surgery to attach the implant to the bone. This helps reduce the risk of infection associated with surgical procedures.

Design

• Head and socket shape: The shape and design of the head and socket can vary. Some designs have a greater range of motion than others.
• Size: The prosthesis comes in different sizes to accommodate different body types and anatomical variations in hip joint anatomy.
• Material composition: The prosthesis head and socket are made from highly durable and biocompatible materials such as cobalt-chromium alloys, ceramic, polyethylene, and titanium.
• Surface texture: The bipolar cementless implant has different surface textures. Some have smooth surfaces, while others are rougher to enhance bone ingrowth.

Q&A

Q1: Does the cementless bipolar work with MRIs?

A1: Yes, the cementless bipolar can work with MRIs because it has a metal-on-metal design and is MRI-compatible.

Q2: What is the weight limit for patients with a cementless bipolar replacement?

A2: Patients can go up to 150 kg. However, it is advisable to avoid heavy lifting and straining because, in some cases, the implants can fail if the weight is too much.

Q3: Can patients run or jog after getting a cementless bipolar replacement?

A3: Patients can engage in high-impact activities like running or jogging, but only after the doctor allows them. Usually, patients begin high-impact activities after 6 months of surgery.

Q4: Is a cemented or cementless better?

A4: A cementless is better because it has a longer lifespan, is better for younger patients, and does not require bone cement, which can wear off after some time.