It is well known that a total knee replacement is one of the most commonly documented lower limb joint replacements – but what do you actually know about hip and ankle replacements?
Let’s take a look at the historical timeline of the development of each joint replacement surgery.
Hip replacements
The first hip joint replacement was performed in Germany in 1891 using ivory for the femoral head.
1920’s – experimented with glass implants (too fragile)
1938 – first total hip replacement using steel. Prone to loosening
1950’s – Metal on acrylic tried – wore out too quickly .
1960’s – Sir John Charnley pioneers “low-friction arthroplasty” using a metal stem, a polyethylene socket, and acrylic bone cement.
1970’s – ceramic bearings are developed
Present Day– Modern hip replacements utilize a variety of materials, including advanced ceramics and highly cross-linked polyethylene, with improved fixation methods and surgical techniques.
Total knee replacements
The first knee replacements, using ivory hinged designs, were attempted in the late 19th century but faced significant challenges with infection and fixation.
1950’s – Hinged prostheses were developed and used. These offered improved stability but still had limitations.
1970’s – The development of the condylar prosthesis, which allowed for replacement of the tibiofemoral surfaces, marked a significant advancement in knee replacement surgery. By mid 1970’s, the concept of replacing the patellofemoral joint, along with preserving or sacrificing the cruciate ligaments, became standard practice.
1980’s – Further advancements included metal backing of tibial inserts, modularity for ease of use, and non-cemented fixation for increased durability.
Present day – Ongoing research focuses on improving knee kinematics, minimizing wear, and optimizing implant design to enhance patient outcomes and longevity.
Total ankle replacement
Initially attempted in the 1970s with limited success. If has evolved significantly through the development of improved implant designs, surgical techniques, and a better understanding of ankle biomechanics.
Early attempts 1970’s – Early designs suffered from issues like poor bone fixation, inaccurate placement, and a mismatch with natural joint mechanics. This led to a period where fusion was preferred over replacement.
Late 1980’s / early 1990’s– second generation Newer implants with improved design features were introduced, including porous coatings for cementless fixation and designs that aimed to better replicate the natural anatomy of the ankle.
Modern era (2000’s to present) – The understanding of ankle biomechanics and soft-tissue balance improved, leading to more precise implant placement and soft tissue management. Advancements in implant materials and engineering, coupled with improved surgical techniques, have enhanced implant survivorship and reduced complications. Implants are now modular allowing for easier revisions if necessary.
The use of ankle replacement has increased significantly, with a rise in annual volumes and expanding surgical indications.
Careful patient selection is crucial for successful ankle replacement. Surgeons now have a more refined understanding of ankle anatomy, biomechanics, and soft tissue balance, leading to more precise and effective surgical procedures. Improved materials and manufacturing techniques have led to more durable and reliable implants.
Summary so far
As you can see, there’s over 100 years of surgical developments for both hip and knee joints. Hip joints – being a simpler joint bio-mechanically, needed less refinement and development than the knee joint. Mainly what was changed was the materials the ball and socket were made from.
The total knee joint being slightly more complex, required more refining and developing but massive strides were made from the 1970’s on.
The frequency of which both joint replacements are performed makes knees and hips a lot more common and a lot more successful because a lot more surgeons have a lot more experience.
The ankle, in the grand scheme of things, is a very new joint replacement surgery concept. That said – massive progress has been made in the past decade in this field. But, it does mean that medium and long term research simply does not yet exist.
This also means that – if I do decide to go ahead, I need to find a surgeon with plenty of experience in this field. I’m picking that this may be harder to find than a knee or hip surgeon.
Anatomy lesson over. 🤗
