science

Patient Specific Talus Spacer

Patient Specific Talus Spacer 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 Patient Specific Talus Spacer rather than just read about it. In short: In February 2021, the U.S. Food and Drug Administration (FDA) approved the Patient Specific Talus Spacer 3D-printed talus implant for humanitarian use.

Key takeaways

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

Reference excerpt

In February 2021, the U.S. Food and Drug Administration (FDA) approved the Patient Specific Talus Spacer 3D-printed talus implant for humanitarian use. The Patient Specific Talus Spacer is the first in the world and first of its kind implant to replace the talus; the bone in the ankle joint that connects the leg and the foot. The implant is used for the treatment of avascular necrosis (AVN) of the ankle joint, a serious and progressive condition that causes the death of bone tissue stemming from a lack of blood supply to the area. The implant provides a joint sparing alternative to other surgical interventions commonly used in late stage AVN that may disable motion of the ankle joint.

Medical uses The Patient Specific Talus Spacer is a 3D printed implant that can be used in talus replacement surgery. The talus spacer is made for each recipient individually modeled from computed tomography (CT) imaging and is fitted to a recipient's specific anatomy. During the replacement surgery, the recipient's talus bone is removed and replaced with the implant, which is made from cobalt chromium alloy. This procedure’s intention is to improve motion and reduce pain for AVN patients who would otherwise require ankle arthrodesis or amputation procedures.

History The FDA reviewed data for the Patient Specific Talus Spacer through the humanitarian device exemption (HDE) process. A Humanitarian Use Device (HUD) is a device that is intended to benefit people by treating or diagnosing a disease or condition that affects not more than 8,000 individuals in the U.S. per year. Data supporting the safety and probable benefit of the Patient Specific Talus Spacer include results from 31 patients and 32 talus replacement surgeries (one patient had operations on both ankles) with the implant. At three years post-operation, the average reported pain decreased from "moderate to severe" prior to surgery to "mild" post-surgery, and average range of motion in the ankle joint also improved. These measures were assessed using standard subjective scoring systems for pain and functionality. By the three-year mark, out of 32 cases, there were three reported additional surgeries. The most common reported adverse events were pain and scar tissue at the surgery site. The FDA granted the HDE approval of the Patient Specific Talus Spacer to Additive Orthopaedics, LLC.

References

This article incorporates public domain material from the United States Department of Health and Human Services

External links "Patient Specific Talus Spacer – H200001". U.S. Food and Drug Administration (FDA). 3 March 2021. Archived from the original on 11 April 2021. "Label and instructions for use" (PDF). Archived from the original (PDF) on 19 April 2021.

Worked examples

Example 1 — a first encounter with Patient Specific Talus Spacer

Start with the simplest possible case. Write down what Patient Specific Talus Spacer 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 Patient Specific Talus Spacer 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 Patient Specific Talus Spacer 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 Patient Specific Talus Spacer

In research: Patient Specific Talus Spacer 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 Patient Specific Talus Spacer 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: Patient Specific Talus Spacer is common in secondary-school and first-year university syllabi. It links to neighbouring topics 3D printed objects, Orthopedic implants, Orthopedics stubs, so understanding it makes those chapters shorter.
In everyday life: Look for Patient Specific Talus Spacer 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 Patient Specific Talus Spacer in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Patient Specific Talus Spacer 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 Patient Specific Talus Spacer out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Patient Specific Talus Spacer in simple terms?

In February 2021, the U.S. Food and Drug Administration (FDA) approved the Patient Specific Talus Spacer 3D-printed talus implant for humanitarian use.

Why does Patient Specific Talus Spacer 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 Patient Specific Talus Spacer?

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 Patient Specific Talus Spacer.