What is Stryker Tripolar THA?
Stryker Tripolar THA is a total hip replacement procedure using a special implant called an unconstrained tripolar implant or dual mobility acetabular component designed by Stryker. This implant was introduced to prevent instability caused by other types of implants. Both primary and revised THA may cause instability of the implant in some patients. Tripolar implants offer better stability and longevity.
Unique Features of the Stryker Tripolar Implant
The dual mobility cup has two articulations, the articulation between the thighbone and the liner and the second articulation between the liner and the hip socket. The dual articulations allow for a greater range of motion of the hip.
Indications of the Stryker Tripolar THA
The Stryker Tripolar THA may be indicated in patients who are undergoing revision hip replacement surgery or those who experience hip instability after total hip arthroplasty.
Preparation for Stryker Tripolar THA
Before surgery, your doctor will perform a complete physical examination to make sure you don’t have any conditions that could negatively affect the surgical outcome.
Routine tests, such as blood tests and X-rays, are usually performed a week before the surgery. Discuss any allergies that you might have and medications you are taking with your doctor to see which ones you should stop taking before surgery.
Stryker Tripolar THA Procedure
The surgery can be performed by a minimally invasive technique. The direct anterior approach may be followed by your surgeon and involves the following steps:
- You may be given general anaesthesia or spinal anaesthesia
- A small incision of about 3-4 inch is made on the front of the hip
- The muscles are carefully moved aside without damaging them
- Detaching muscles from the tendons are not necessary
- The damaged cartilage and bone are removed
- The implant components are inserted including a stem that is inserted into the thigh bone, a polished hip socket component, a large plastic head that fits into the hip socket, and an additional smaller ceramic or metal head that snap-fits into the larger plastic head.
- After the new hip is tested for a range of motion and function, the incision is closed and bandaged.
The Stryker Tripolar THA procedure may be performed using robotic-arm assisted technology.
Recovery after Stryker Tripolar THA
Most patients are encouraged to walk or stand up on the same day as the procedure and you can expect to return to routine activities within 3 to 6 weeks after surgery.
Risks and Complications associated with Stryker Tripolar THA
The Stryker Tripolar THA is a very safe procedure. However, as with any surgery, there is a minimal risk of complications which include:
- Dislocation of the implant
- Formation of blood clots
- Injury to the nerves
Benefits of Stryker Tripolar THA
The benefits of Stryker Tripolar THA include:
- Very low rate of hip instability
- Good functional improvement
- Low rate of re-operation