Arthroplasty Indian Medical PG Practice Questions and MCQs
Practice Indian Medical PG questions for Arthroplasty. These multiple choice questions (MCQs) cover important concepts and help you prepare for your exams.
Arthroplasty Indian Medical PG Question 1: During abutment preparation of natural teeth for overdenture, which of the following is more preferable?
- A. Short copings
- B. Long copings
- C. Bare root surface (Correct Answer)
- D. None of the above options are ideal.
Arthroplasty Explanation: ***Bare root surface***
- A **bare root surface** is often preferred as it allows for optimal placement of the overdenture framework directly over the root without significant bulk.
- This approach minimizes tooth reduction and maintains more of the natural tooth structure, which helps preserve the **periodontal health** surrounding the abutment.
*Short copings*
- While short copings can provide some protection to the abutment, they add vertical height to the restored tooth.
- This added height can make it challenging to achieve proper occlusal clearance and may compromise the stability of the **overdenture**.
*Long copings*
- **Long copings** require more extensive tooth reduction, potentially weakening the abutment tooth.
- They can also increase the leverage on the abutment, increasing the risk of dislodgement and reducing the **longevity** of the overdenture.
*None of the above options are ideal.*
- This statement is incorrect because a **bare root surface** is a viable and often preferred option for overdenture abutment preparation.
- The decision depends on individual patient factors and the specific design of the **overdenture**, but a bare root surface is often optimal.
Arthroplasty Indian Medical PG Question 2: A 65-year-old lady presented with a swollen and painful knee. On examination, she was found to have grade III osteoarthritic changes. What is the best course of action?
- A. Conservative management
- B. Total knee replacement (Correct Answer)
- C. Arthroscopic washing
- D. Partial knee replacement
Arthroplasty Explanation: ***Total knee replacement***
- For **grade III osteoarthritis** in a 65-year-old, a total knee replacement is the most definitive and effective treatment to relieve pain and restore function in a severely damaged joint.
- This procedure addresses widespread cartilage loss and structural changes typical of advanced osteoarthritis.
*Conservative management*
- This approach is typically favored for **mild to moderate osteoarthritis**, involving physical therapy, NSAIDs, and lifestyle modifications.
- For **grade III changes** with significant pain and swelling, conservative measures are unlikely to provide sufficient relief or halt disease progression effectively.
*Arthroscopic washing*
- **Arthroscopic lavage** and debridement are rarely recommended for osteoarthritis as they have not shown sustained benefits for pain or function.
- It is sometimes used for specific mechanical symptoms, but it does not address the underlying cartilage loss and structural damage in severe osteoarthritis.
*Partial knee replacement*
- A **partial knee replacement** is suitable when osteoarthritis is confined to a single compartment of the knee, and the other compartments are healthy.
- Given the indication of "grade III osteoarthritic changes" without specifying a single compartment, a total knee replacement is generally more appropriate for widespread disease.
Arthroplasty Indian Medical PG Question 3: A 45-year-old was given steroids after renal transplant. After 2 years he had difficulty in walking and pain in both hips. Which one of the following is most likely cause?
- A. Tuberculosis
- B. Primary Osteoarthritis
- C. Aluminum toxicity
- D. Avascular necrosis (Correct Answer)
Arthroplasty Explanation: ***Avascular necrosis***
- Chronic **steroid use**, especially after organ transplantation, is a major risk factor for avascular necrosis (AVN) due to impaired blood supply to bone, particularly in the femoral head.
- **Hip pain** and **difficulty walking** are classic symptoms of AVN, which can lead to collapse of the femoral head if untreated.
*Tuberculosis*
- While tuberculosis can affect bones and joints (**Pott's disease**), it typically presents with more systemic symptoms like fever, weight loss, and night sweats, which are not mentioned.
- Skeletal TB often affects the spine more commonly and usually presents with granulomatous inflammation and bone destruction rather than isolated joint pain in the hips
*Primary Osteoarthritis*
- Primary osteoarthritis is typically an **age-related degenerative joint disease** occurring in older individuals, and while it causes hip pain, it is not directly linked to steroid use in a 45-year-old.
- The onset of pain in this scenario, following long-term steroid use, strongly points away from primary osteoarthritis as the primary driving factor.
*Aluminum toxicity*
- Aluminum toxicity can occur in patients with **renal failure** and can cause **osteomalacia** or **dialysis encephalopathy**.
- Its presentation typically involves bone pain, fractures, and neurological symptoms, but it does not specifically cause avascular necrosis of the femoral head as seen with steroid use.
Arthroplasty Indian Medical PG Question 4: A 55-year-old male, known smoker, complains of calf pain while walking. He experiences calf pain while walking but can continue walking with effort. Which grade of claudication does this patient fall under?
- A. Grade I (Mild claudication)
- B. Grade II (Moderate claudication) (Correct Answer)
- C. Grade III (Severe claudication)
- D. Grade IV (Ischemic rest pain)
Arthroplasty Explanation: ***Grade II (Moderate claudication)***
- **Grade II claudication** is characterized by **intermittent claudication** where the patient experiences pain while walking but can **continue walking with effort**.
- This level of claudication reflects a moderate degree of peripheral arterial disease, where blood flow is sufficiently compromised to cause pain with exertion but not severe enough to force immediate cessation of activity.
- The patient in this scenario can continue ambulation despite discomfort, which is the defining feature of this grade.
*Grade I (Mild claudication)*
- **Grade I claudication** involves discomfort or pain that the patient can **tolerate without significantly altering their gait or pace**.
- In this stage, the pain is minimal, and the patient may perceive it as a dull ache or mild fatigue rather than true pain.
- Walking can continue without significant effort or limitation.
*Grade III (Severe claudication)*
- **Grade III claudication** is marked by pain that is **severe enough to stop the patient from walking within a short distance** (typically less than 200 meters).
- The pain forces the patient to rest and recover before they can resume walking.
- This represents significant functional limitation in daily activities.
*Grade IV (Ischemic rest pain)*
- **Grade IV**, also known as **critical limb ischemia**, involves **pain even at rest**, especially in the feet or toes, often worsening at night when the limb is elevated.
- This stage indicates severe arterial obstruction and is frequently associated with **ulcers, non-healing wounds, or gangrene**.
- This represents advanced peripheral arterial disease requiring urgent intervention.
**Note:** This grading system is a simplified clinical classification. The standard medical classifications for peripheral arterial disease are the **Fontaine classification** (Stages I-IV) and **Rutherford classification** (Categories 0-6).
Arthroplasty Indian Medical PG Question 5: Nickel-titanium alloy has increased flexibility over stainless steel. How does the modulus of elasticity for nickel-titanium alloy compare to that of stainless steel?
- A. One-fourth to one-fifth that of stainless steel (Correct Answer)
- B. Similar to stainless steel
- C. 2 to 3 times that of stainless steel
- D. Half that of stainless steel
Arthroplasty Explanation: ***One-fourth to one-fifth that of stainless steel***
- **Nickel-titanium (NiTi) alloys** are known for their exceptional **superelasticity** and **shape memory properties**, which are directly related to their low modulus of elasticity.
- This significantly lower modulus allows NiTi wires to undergo large elastic deformations without permanent deformation, providing increased flexibility and lighter, more continuous forces in orthodontics.
*Similar to stainless steel*
- This statement is incorrect because NiTi alloys were developed precisely to overcome the limitations of stainless steel, particularly its high stiffness.
- If their moduli were similar, NiTi would not offer the clinical advantages of increased flexibility and lower force application.
*2 to 3 times that of stainless steel*
- This is incorrect as a higher modulus of elasticity would mean increased stiffness and reduced flexibility, which is contrary to the known properties and clinical applications of NiTi alloys.
- Materials with higher moduli require greater force to deform and would be less suitable for applications requiring gentle, continuous forces like initial orthodontic tooth movement.
*Half that of stainless steel*
- While NiTi has a lower modulus than stainless steel, "half" is not an accurate approximation of the difference; the actual reduction is significantly greater, typically in the range of one-fourth to one-fifth.
- This difference is crucial for explaining the unique clinical benefits of NiTi, such as its ability to be bent significantly without permanent deformation.
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