Future Trends in Computer-Assisted Orthopaedics Indian Medical PG Practice Questions and MCQs
Practice Indian Medical PG questions for Future Trends in Computer-Assisted Orthopaedics. These multiple choice questions (MCQs) cover important concepts and help you prepare for your exams.
Future Trends in Computer-Assisted Orthopaedics Indian Medical PG Question 1: What is the condition commonly known as jumper's knee?
- A. Inflammation of the patellar tendon at its insertion on the patella.
- B. Tendinopathy of the quadriceps tendon.
- C. Injury to the hamstring tendon.
- D. Patellar tendonitis due to overuse of the patellar tendon. (Correct Answer)
Future Trends in Computer-Assisted Orthopaedics Explanation: ***Patellar tendonitis due to overuse of the patellar tendon.***
- **Jumper's knee** is the common term for **patellar tendonitis**, which specifically refers to inflammation of the patellar tendon.
- This condition is frequently caused by **overuse**, especially in activities involving repetitive jumping and landing.
*Inflammation of the patellar tendon at its insertion on the patella.*
- While jumper's knee does involve inflammation of the patellar tendon, it is more commonly at its insertion on the **tibial tubercle** or specifically its origin at the **inferior pole of the patella**, not necessarily at the patella itself.
- This option is less precise as it describes only one aspect of the condition without mentioning the critical role of overuse.
*Tendinopathy of the quadriceps tendon.*
- **Tendinopathy of the quadriceps tendon** is a distinct condition affecting the tendon above the patella, known as **quadriceps tendinopathy**.
- It presents with pain proximal to the patella, differentiating it from jumper's knee, which involves the tendon distal to the patella.
*Injury to the hamstring tendon.*
- An **injury to the hamstring tendon** would cause pain and symptoms on the posterior aspect of the knee or thigh.
- This is completely unrelated to jumper's knee, which is characterized by anterior knee pain.
Future Trends in Computer-Assisted Orthopaedics Indian Medical PG Question 2: Gold standard investigation for breast carcinoma screening in a patient with silicone breast implants
- A. Mammography
- B. CT scan
- C. USG
- D. MRI (Correct Answer)
Future Trends in Computer-Assisted Orthopaedics Explanation: ***MRI***
- **MRI** is considered the **gold standard** for breast cancer screening in patients with silicone breast implants due to its superior ability to visualize breast tissue through the implant and detect subtle lesions.
- It offers **high sensitivity** in detecting both implant rupture and early malignancies, often providing better clarity than mammography in augmented breasts where implants can obscure tissue.
*Mammography*
- While a standard screening tool, **mammography** can be limited in patients with silicone implants because the implants can **obscure adjacent breast tissue**, making detection of small masses challenging.
- Special views (e.g., **Eklund views**) can be used, but sensitivity is still reduced compared to MRI in augmented breasts.
*CT scan*
- **CT scans** are not routinely used for primary breast cancer screening due to their use of **ionizing radiation** and lower sensitivity for detecting early breast lesions compared to MRI.
- CT is more commonly used for **staging** advanced cancers or evaluating complex masses detected by other modalities.
*USG*
- **Ultrasound (USG)** is a valuable complementary tool, especially for evaluating palpable lumps or clarifying findings from mammography, but it is **operator-dependent** and has a lower overall sensitivity for general screening compared to MRI.
- It is particularly useful for differentiating between **cystic and solid masses** and detecting implant ruptures but is not the gold standard for comprehensive screening in augmented breasts.
Future Trends in Computer-Assisted Orthopaedics Indian Medical PG Question 3: In which of the following situations is breast conservation surgery not indicated?
- A. SLE
- B. Large pendular breast
- C. Diffuse microcalcification
- D. All of the options (Correct Answer)
Future Trends in Computer-Assisted Orthopaedics Explanation: ***All of the options***
- All listed scenarios—**large pendular breast**, **SLE**, and **diffuse microcalcification**—represent situations where breast conservation surgery is generally contraindicated or challenging.
- Their presence often necessitates alternative treatment approaches, such as mastectomy, to achieve optimal oncologic and cosmetic outcomes.
*Large pendular breast*
- While not an absolute contraindication, a **very large or pendulous breast** can make it difficult to achieve a satisfactory cosmetic outcome after breast conservation surgery.
- The disproportionate breast size post-lumpectomy may lead to significant **asymmetry**, requiring further reconstructive procedures.
*SLE*
- Patients with **Systemic Lupus Erythematosus (SLE)** are at an increased risk of complications from radiation therapy, a mandatory component of breast conservation surgery.
- They tend to experience more severe and prolonged **acute and chronic skin reactions** to radiation, which can significantly impair healing and quality of life.
*Diffuse microcalcification*
- **Diffuse microcalcification** within the breast can indicate widespread in situ carcinoma (e.g., DCIS) or an invasive carcinoma with extensive intraductal component.
- In such cases, achieving **clear surgical margins** with breast conservation surgery can be challenging and often leads to multiple re-excisions or an increased risk of local recurrence.
Future Trends in Computer-Assisted Orthopaedics Indian Medical PG Question 4: All of the following are indications for open reduction and internal fixation (ORIF) of fractures EXCEPT:
- A. Multiple trauma
- B. Stable closed fracture (Correct Answer)
- C. Compound fracture
- D. Intra-articular fracture
Future Trends in Computer-Assisted Orthopaedics Explanation: ***Stable closed fracture***
- A **stable closed fracture** typically does not require surgical intervention with ORIF as it can usually be managed non-surgically with casting or bracing.
- The goal of ORIF is to achieve **anatomic reduction and rigid fixation**, which is not necessary for stable fractures that maintain alignment.
*Multiple trauma*
- In patients with **multiple trauma**, early stabilization of long bone fractures using ORIF can help reduce pain, prevent further injury, and facilitate patient mobilization.
- This approach aims to reduce the risk of complications such as **ARDS (acute respiratory distress syndrome)** and fat embolism for critically ill patients.
*Compound fracture*
- **Compound (open) fractures** involve a break in the skin, exposing the bone to the external environment, and are a classic indication for surgical management.
- ORIF in these cases helps to achieve **stabilization** after debridement, crucial for preventing infection and promoting bone healing.
*Intra-articular fracture*
- **Intra-articular fractures** involve the joint surface, and accurate anatomical reduction is critical to prevent post-traumatic arthritis and preserve joint function.
- ORIF provides the precise reduction and stable fixation needed to restore the **joint congruity**.
Future Trends in Computer-Assisted Orthopaedics Indian Medical PG Question 5: Which technique is considered the best for evaluating bone regeneration after periodontal surgery?
- A. Intraoral Periapical radiography
- B. Orthopantomogram
- C. Digital subtraction radiography
- D. Cone Beam Computed Tomography (Correct Answer)
Future Trends in Computer-Assisted Orthopaedics Explanation: ***Cone Beam Computed Tomography***
- **CBCT** offers a three-dimensional view, which is superior for assessing **bone density, volume**, and the precise morphology of bone regeneration.
- It allows for detailed analysis of defects and regeneration without the superimposition of anatomical structures, which is a limitation of 2D radiographs.
*Intraoral Periapical radiography*
- **Periapical radiographs** provide only a two-dimensional image and are poor at differentiating between **bony infill** and soft tissue.
- They are limited by projection geometry and cannot accurately represent **bone volume** or complex defects.
*Orthopantomogram*
- An **OPG** provides a panoramic view but suffers from significant **magnification, distortion**, and superimposition of structures.
- It is not precise enough for the detailed assessment required to evaluate **bone regeneration** after periodontal surgery.
*Digital subtraction radiography*
- **Digital subtraction radiography** can detect subtle changes in bone mineral content by subtracting two images taken at different times.
- While useful for showing small changes, it is still a **2D technique** and does not provide information on **bone volume** or the three-dimensional architecture of the regenerated bone.
Future Trends in Computer-Assisted Orthopaedics Indian Medical PG Question 6: Vacuum assisted closure is contraindicated in which of the following conditions -
- A. Chronic osteomyelitis
- B. Large amount of necrotic tissue with eschar (Correct Answer)
- C. Abdominal wound
- D. Surgical wound dehiscence
Future Trends in Computer-Assisted Orthopaedics Explanation: ***Large amount of necrotic tissue with eschar***
- The presence of a large amount of **necrotic tissue** and **eschar** is a contraindication for VAC therapy because it prevents effective contact between the foam and viable tissue, impairing wound healing.
- Eschar acts as a physical barrier, trapping bacteria and hindering the proper function of negative pressure by preventing uniform pressure distribution and fluid removal from the wound bed.
*Chronic osteomyelitis*
- While chronic osteomyelitis can be challenging, VAC therapy can sometimes be used as an **adjunctive treatment** after surgical debridement to manage the wound and promote granulation tissue formation.
- It helps in controlling infection and closing the wound by removing exudates, reducing edema, and improving blood flow.
*Abdominal wound*
- VAC therapy is commonly used for **abdominal wounds**, especially after damage control surgery or in cases of open abdomen management.
- It facilitates closure by promoting granulation, reducing edema, and protecting the abdominal contents.
*Surgical wound dehiscence*
- **Surgical wound dehiscence** is a common indication for VAC therapy, as it helps to manage the open wound, promote granulation tissue, and prepare the wound for eventual secondary closure or grafting.
- VAC therapy reduces surgical site infections, removes exudates, and enhances tissue perfusion, leading to better wound healing outcomes.
Future Trends in Computer-Assisted Orthopaedics Indian Medical PG Question 7: What does the given image show?
- A. Doyen's periosteal elevator (Correct Answer)
- B. Cobb's spinal elevator
- C. Leksell's rongeur
- D. Key periosteal elevator
Future Trends in Computer-Assisted Orthopaedics Explanation: ***Doyen's periosteal elevator***
- This instrument is characterized by its **curved, spoon-like working end** and solid handle, designed for **elevating the periosteum** from bone.
- Doyen's elevator comes in various sizes and angles, but the distinct hook-like curve is a key identifying feature, distinguishing it from other elevators.
*Cobb's spinal elevator*
- Cobb's elevator typically has a **flat, broad, and slightly curved blade** with a rounded or tapered tip, suitable for dissecting along bony surfaces, particularly in spinal surgery.
- Its design prioritizes broad, even separation of tissue layers, contrasting with the more acute curve of the Doyen's.
*Leksell's rongeur*
- A rongeur is a biting instrument used for **gnawing away bone or tough tissue**, characterized by hinged jaws with sharp, cup-shaped ends.
- The image clearly shows a single-piece instrument without hinged jaws, ruling out a rongeur.
*Key periosteal elevator*
- The Key elevator typically features a **broader, more rounded or slightly angled tip** and a flat, somewhat spatula-like working end, used for general periosteal elevation.
- While also a periosteal elevator, its working end does not exhibit the characteristic deep, hook-like curve seen in the Doyen's elevator.
Future Trends in Computer-Assisted Orthopaedics Indian Medical PG Question 8: A surgeon experiences pin-site fracture during reference array fixation in computer-navigated TKA in an osteoporotic patient. Subsequently, three more cases develop similar complications. What systematic approach should be implemented to prevent this complication?
- A. Switch to electromagnetic navigation system
- B. Use unicortical pins instead of bicortical pins with reduced insertion torque protocol (Correct Answer)
- C. Abandon navigation in all osteoporotic patients
- D. Increase pin diameter for better fixation
Future Trends in Computer-Assisted Orthopaedics Explanation: ***Use unicortical pins instead of bicortical pins with reduced insertion torque protocol***
- **Pin-site fractures** are a known complication in navigated TKA, especially in **osteoporotic bone**, and can be mitigated by reducing the **stress risers** created by drilling.
- Using **unicortical pins** and avoiding power drivers to limit **insertion torque** provides sufficient stability for reference arrays while minimizing the risk of cortical failure.
*Switch to electromagnetic navigation system*
- **Electromagnetic navigation** aims to resolve line-of-sight issues but does not inherently eliminate the need for stable skeletal fixation of reference sensors.
- Switching systems is a costly equipment change that does not directly address the underlying **biomechanical failure** of the bone-pin interface in osteoporosis.
*Abandon navigation in all osteoporotic patients*
- Abandoning navigation denies the patient population the benefits of **precise alignment** and component positioning where it is often most needed due to poor bone quality.
- Systematic technical modifications are preferred over total abandonment of a beneficial **surgical technology**.
*Increase pin diameter for better fixation*
- Increasing the **pin diameter** is counterproductive as larger holes create larger **stress concentrators**, significantly increasing the risk of **periprosthetic fracture** in brittle bone.
- A thicker pin displaces more cortical volume, which reduces the **structural integrity** of the femur or tibia in osteoporotic patients.
Future Trends in Computer-Assisted Orthopaedics Indian Medical PG Question 9: A tertiary care center is planning to implement computer-assisted surgery program for joint replacement. They have limited budget and expertise. Which factor should be prioritized when selecting a navigation system?
- A. Image-based system requiring dedicated CT scanner
- B. Imageless navigation with good technical support and training program (Correct Answer)
- C. Most expensive system with all features available
- D. System with steepest learning curve to ensure only expert surgeons use it
Future Trends in Computer-Assisted Orthopaedics Explanation: ***Imageless navigation with good technical support and training program***
- **Imageless navigation** is the most cost-effective choice for limited budgets as it avoids the preoperative costs and infrastructure associated with **CT scans** or dedicated imaging.
- Prioritizing **technical support** and **training programs** is essential for overcoming the **learning curve** (typically 15-20 cases) in a center with limited initial expertise.
*Image-based system requiring dedicated CT scanner*
- These systems increase the **per-case cost** and require significant capital investment in preoperative **CT imaging** infrastructure.
- They introduce additional **radiation exposure** to the patient and complex logistics that may not suit a center with limited resources.
*Most expensive system with all features available*
- Purchasing the most expensive system is counterproductive for a facility with a **limited budget**, as many advanced features may not be utilized during the initial phase.
- High-cost systems often have higher **maintenance contracts** and operational costs that can lead to program failure in resource-constrained environments.
*System with steepest learning curve to ensure only expert surgeons use it*
- A **steep learning curve** is a major barrier to the adoption of new technology and can lead to increased **operation time** and operative complications.
- The goal of implementing a new program should be **sustainable integration** and broad clinical utility rather than restricting access through technical difficulty.
Future Trends in Computer-Assisted Orthopaedics Indian Medical PG Question 10: A study compares outcomes of computer-navigated versus conventional total knee arthroplasty. Navigation group shows 95% implants within 3 degrees of neutral mechanical axis versus 80% in conventional group (p<0.05). However, 5-year functional outcomes and survival rates are similar. What is the most appropriate interpretation?
- A. Navigation is inferior due to longer operative time without functional benefit
- B. Conventional technique should be abandoned
- C. Improved radiographic alignment may not translate to short-term functional improvement but could affect long-term survival (Correct Answer)
- D. The study proves navigation provides no clinical benefit
Future Trends in Computer-Assisted Orthopaedics Explanation: ***Improved radiographic alignment may not translate to short-term functional improvement but could affect long-term survival***
- Navigation significantly improves **radiographic alignment** consistency (p<0.05), but high-quality evidence shows this does not always create immediate **functional differences** within 5 years.
- While **short-term functional outcomes** are similar, reducing **outliers** to within 3 degrees of the neutral axis is theoretically linked to better **implant survival** beyond 10-15 years.
*Navigation is inferior due to longer operative time without functional benefit*
- Increased **operative time** is a known drawback, but it does not make the technique **inferior** if it achieves superior technical precision.
- The term "inferior" is clinically inaccurate here as the study demonstrates **statistically significant** improvements in surgical accuracy.
*Conventional technique should be abandoned*
- **Conventional techniques** are still the gold standard because they provide identical **short-term survival** and clinical scores at a lower cost.
- Abandonment is unjustified as long as the **clinical outcome** parity exists and long-term superiority of navigation is not yet definitively proven by this data.
*The study proves navigation provides no clinical benefit*
- Improved **mechanical axis** alignment is itself a technical clinical benefit that reduces mechanical stress on the polyethene liner.
- A lack of difference in **5-year scores** does not prove a lack of benefit; it only indicates that **short-term follow-up** may be insufficient to detect long-term wear advantages.
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