Hip and Knee Arthroplasty Review

Arthroplasty revision is a surgical procedure performed when previous arthroplasty, either in the hip or knee, fails, either due to implant wear, dislocation, infection, or other anatomical or mechanical dysfunction. The goal of the revision is to restore joint functionality, relieve pain and improve patient mobility.

The need for revision usually arises from several factors, which affect the performance of the implant and the health of the joint:

• Implant wear: Over time, implants, regardless of their material, can be damaged by mechanical stress, causing pain and limited mobility.
• Implantfailure: The failure of the implant to “integrate” due to poor placement or manufacturing defects may cause the joint to function and the need for revision.
• Dislocation or instability: Dislocation of the implant or increased mobility of the joint can cause pain and require revision to restore stability.
• Infection: An infection that affects the implant requires immediate medical intervention and possibly the removal and replacement of the implant.
• Bone dehydration or secondary lesions: Secondary damage to the bones around the implant can lead to instability and make revision necessary.

The revision process involves removing the old implant and placing a new one, adapted to the patient’s anatomical needs. Usually, it is a demanding and complex surgical procedure, which, in addition to the preoperative check-up, has the following stages:

• Removal of the implant: Removing the old implant can be technically demanding, especially if there has been significant integration of the implant into the bone or in case of severe wear.
• Placement of the new implant: the new implant is placed with advanced surgical techniques to achieve its optimal placement.
• Restoration of functionality: After the placement of the new implant, the surgeon checks the stability of the joint and the complete restoration of mobility to achieve excellent motor results.
• Rehabilitation: Rehabilitation after revision requires careful physiotherapy to strengthen the joint, restore functionality, and prevent complications.

Arthroplasty revision offers significant advantages for patients, however, it also poses specific challenges:

Advantages:

• Painrelief: The revision restores mobility and reduces the pain caused by wear or failure to place the original implant.
• Restoration of mobility: With the new arthroplasty, patients regain the ability for normal joint movement and can return to their daily activities immediately.
• Improved quality of life: The revision allows patients to return to activities that they had limited due to joint pain and dysfunction.

Difficulties:

• Increased surgical difficulty: The revision process is more demanding and time-consuming than the initial arthroplasty, due to the anatomical changes resulting from the use of the old implant.
• Risk of complications: Revision increases the risk of infections, bleeding, inpatient complications, and other surgical problems.
• Increased recovery time: Recovery after revision may take longer, requiring extensive physiotherapy and long-term follow-up.

Modern implants for hip and knee arthroplasty feature improved materials. At the same time, technological advances in the manufacture and design of personalized implants have reduced the chances of wear and failure, improving the results of the review.

Also, the use of robotic assistance and computer navigation has increased the accuracy of implant placement, improving joint stability and reducing complications. Robotic systems such as ROSA and Naviswiss offer excellent accuracy, reducing the risk of anatomical errors and offering better implant placement.

Hip and knee arthroplasty review is a demanding but highly effective procedure for restoring joint functionality and reducing pain in patients with previous arthroplasty failure. Modern techniques and robotic technologies make the process safer and more efficient, reducing risks but also improving results. The correct preoperative assessment, the selection of the appropriate implant, the valid choice of technique and adequate rehabilitation are critical for the success of the operation.