Orthopedic Screw Implants Surgical Techniques

🦴 ORTHOPEDIC SCREW IMPLANTS

🔧 DETAILED SURGICAL TECHNIQUE

Orthopedic screws are used for fracture fixation, compression, stabilization, and implant anchorage, either independently or with plates, nails, and external fixators.

1. 📋 Preoperative Planning

Clinical Evaluation

• Assess:

  • Fracture pattern (simple, oblique, comminuted)

  • Bone quality (osteoporotic vs normal)

  • Soft tissue condition

Imaging

• X-ray (AP & lateral)

• CT scan (complex fractures)

Screw Selection

• Types:

  • Cortical screws

  • Cancellous screws

  • Cannulated screws

  • Locking screws

  • Herbert (headless) screws

• Determine:

  • Screw length

  • Diameter

  • Thread type

👉 Proper selection ensures optimal fixation and stability.

2. 🛏️ Patient Positioning & Setup

• Position depends on fracture site

• Ensure:

  • Good surgical exposure

  • C-arm access

• Sterile preparation

• Administer anesthesia

3. 🔪 Surgical Exposure

• Make incision along anatomical planes

• Preserve soft tissue and periosteum

• Expose fracture site (if open technique used)

4. 📍 Fracture Reduction

Steps:

1. Align fracture fragments

2. Use:

   • Reduction clamps

   • Forceps

3. Temporary fixation:

   • K-wires

👉 Confirm reduction under fluoroscopy.

5. 🪛 DRILLING TECHNIQUE

Steps:

1. Select appropriate drill bit

2. Use drill guide

3. Drill perpendicular to bone (unless angled fixation required)

4. Drill both cortices (bicortical) if needed

Key Points:

• Use irrigation to prevent heat necrosis

• Avoid over-penetration

6. 📏 DEPTH MEASUREMENT

Steps:

1. Insert depth gauge

2. Measure hole length

3. Select appropriate screw length

7. 🧵 TAPPING (if required)

Steps:

1. Insert tap into drilled hole

2. Advance slowly

3. Reverse intermittently to clear debris

👉 Required for cortical screws in dense bone.

8. 🔩 SCREW INSERTION TECHNIQUE

Steps:

1. Insert screw using screwdriver

2. Advance along drilled path

3. Tighten until secure

4. Avoid over-tightening (prevents stripping)

9. ⚙️ SPECIAL SCREW TECHNIQUES

A. Lag Screw Technique (Compression)

Steps:

1. Drill gliding hole in near cortex

2. Drill smaller hole in far cortex

3. Insert screw

4. Tightening compresses fracture

👉 Used for oblique fractures.

B. Positional Screw Technique

• Holds fragments without compression

• Used when compression is not desired

C. Cannulated Screw Technique

Steps:

1. Insert guidewire under fluoroscopy

2. Drill over guidewire

3. Insert screw

👉 Provides high accuracy.

D. Locking Screw Technique

Steps:

1. Insert screw into threaded plate hole

2. Lock screw to plate

👉 Creates fixed-angle construct.

E. Headless Compression Screw (Herbert Type)

Steps:

1. Insert guidewire

2. Drill and countersink

3. Insert screw fully within bone

👉 Ideal for:

• Small bones

• Intra-articular fractures

10. ⚖️ Intraoperative Assessment

Check:

• Screw position

• Fracture stability

• Alignment

Tools:

• Fluoroscopy

11. 🧼 Wound Closure

• Irrigation

• Hemostasis

• Layered closure

• Dressing

12. 🏥 Postoperative Protocol

Immediate Care

• Pain management

• Limb elevation

Rehabilitation

• Early mobilization

• Weight-bearing (as per fixation stability)

13. ⚠️ Complications & Prevention

Complication Prevention

Screw loosening

Proper size & technique

Screw breakage

Avoid excessive force

Bone damage

Controlled drilling

Infection

Sterile technique

Malposition

Use imaging guidance

14. 🔓 Screw Removal

Indications:

• Symptomatic implants

• Infection

• Pediatric cases

Steps:

1. Re-expose screw

2. Engage screwdriver

3. Remove carefully

15. ✅ Key Surgical Principles

• Accurate drilling and alignment

• Correct screw length and type

• Achieve stable fixation

• Preserve bone and soft tissue

• Use imaging guidance

🌟 Advantages of Orthopedic Screws

• Strong fixation

• Versatile applications

• Minimal implant bulk

• Can be combined with other systems

📌 Conclusion

Orthopedic screw systems from Jindal Medi Surge provide precise and reliable fixation across a wide range of fractures, ensuring:

• Stable osteosynthesis

• Faster healing

• Improved functional outcomes