science

Rotationplasty

Rotationplasty is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Rotationplasty rather than just read about it. In short: Rotationplasty, commonly known as a Van Nes rotation or Borggreve rotation, is a type of autograft wherein a portion of a limb is removed, while the remaining limb below the involved portion is rotated and reattached. This procedure is used when a portion of an extremity is injured, or affected by a disease such as cancer.

Key takeaways

Rotationplasty belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Rotationplasty to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Rotationplasty from memory before moving on to harder problems.

Reference excerpt

Rotationplasty, commonly known as a Van Nes rotation or Borggreve rotation, is a type of autograft wherein a portion of a limb is removed, while the remaining limb below the involved portion is rotated and reattached. This procedure is used when a portion of an extremity is injured, or affected by a disease such as cancer. The procedure is most commonly used to transfer the ankle joint to the knee joint following removal of a distal femoral bone tumor, such as osteosarcoma. The limb is rotated because the ankle flexes in the opposite direction compared to the knee. The benefit to the patient is that they have a functioning knee joint to which a prosthetic can be fitted, providing them with better mobility.

History Rotationplasty was first performed by Joseph Borggreve in 1927. He performed the procedure on a 12-year-old boy who suffered from tuberculosis. However, the procedure was not well known until 1950, when Dutch orthopedist Cornelis Pieter van Nes (1897–1972) reported the results of rotationplasty procedures. He became well known for establishing the procedure. Since then, many surgeons have performed modified versions of rotationplasty and have had great success. Originally, rotationplasty was performed to treat infections and tumors around the knee. It was also a common treatment for osteosarcoma. While it is still being used to treat their complications, rotationplasty is also used to treat growing children who have been diagnosed with tumors around the knee. Rotationplasty is also performed on children with congenital femoral deficiencies. Those deficiencies cause "unstable hip joint[s] and a femur that is 50% shorter than the contralateral, normal femur." This procedure gives rotationplasty patients the ability to have the use of both feet and allows them to continue living an active lifestyle.

Procedure In the actual procedure, the bone affected by the tumor, as well as a small part of the healthy femoral and occasionally tibia bone, is removed. A portion of the leg removed; the ankle joint is then turned 180 degrees and is reattached to the thigh. They are held together by plates and screws until they have healed naturally. The surgery can take anywhere from 6 to 10 hours, with a day or two in intensive care. The leg is kept in a cast for 6 to 12 weeks. After the leg has sufficiently healed, the leg can be fitted for a prosthetic.

Advantages and disadvantages

Advantages Rotationplasty allows the use of the knee joint, whereas amputation would result in loss of that joint. Therefore, it provides a better attachment point and range of motion for a prosthetic limb. As a result, children who have had rotationplasty can play sports, run, climb, and do more than would be possible with a jointless prosthetic. After the procedure, the leg is durable; patients do not typically have to undergo additional surgeries.

Disadvantages Rotationplasty can result in poor circulation throughout the leg, infection, nerve injuries, bone healing complications, and fracture of the leg.

Quality of life A 2002 study measured life contentment and quality of life in 22 patients who had been recipients of the rotationplasty procedure at least 10 years before. They found that those patients that were younger when the procedure was performed were happier with their lives. It was also found that 8 of the 22 had to have a total of 21 surgical revisions performed in the 10 years. In comparison to the general population, the patients had a higher percentage of quality of life, 83% compared to 75%. Overall, the patients were more content with different aspects of their lives than the general population.

References

External links Sheena Goodyear (27 April 2018). "Girl whose leg was amputated and reattached backwards hopes to dance again". cbc.ca. Canadian Broadcasting Corporation.

Illustrations

Worked examples

Example 1 — a first encounter with Rotationplasty

Start with the simplest possible case. Write down what Rotationplasty claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Rotationplasty before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Rotationplasty ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Rotationplasty

In research: Rotationplasty appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Rotationplasty in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Rotationplasty is common in secondary-school and first-year university syllabi. It links to neighbouring topics Orthopedic surgical procedures, Surgical removal procedures, Types of amputation, so understanding it makes those chapters shorter.
In everyday life: Look for Rotationplasty outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Rotationplasty in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Rotationplasty means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Rotationplasty out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Rotationplasty in simple terms?

Why does Rotationplasty matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Rotationplasty?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Rotationplasty.