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Cephalomedullary Nail - Coggle Diagram
Cephalomedullary Nail
Alternative USP's
Intersecting Screw Trajectories
Anti-Rotation Screw (Potentially Multi-Planar)
Expanding Lag Screw
Pin or Blade for Bone Compression
Extended Short Nail
Plug to Strengthen Cannulated Lag Screw After Placement
Active Compression of Fracture (2 piece lag screw design)
Proximal Press Fit
Nail Stem Shape
Circular Fluted Shape
Polygonal Shape
Oblong Shape
Trapezoidal Shape
Non-Round Entry Portal
Using Rasp
Pre-Drill Round and Shape Afterwards
Small Round Reamer Used Through a Guide (Tissue Protector Type INS)
Correct Alignment / Easy Adjustment
Placement of K-Wire before Non-Round Opening of Bone
Nail Alignment Radiographically before Seating Stem (Wire in Targeting Arm)
Alignment of Non-Round Reamer Radiographically Before Opening
Round Nail Placed as Normal - Then Expanded to be tight fitting
Activated by Lag Screw Placement
Activated by Set Screw Placement
Partially Remove Stem to Rotate (Only small section of stem provides fit)
Nail Micromotion
MM Insert
2 Part Insert (Above & Below)
Insert Rotates to Enclose Screw
2 Part Telescoping Nail
Semi-Flexible Nail
MM in Distal End
Lag Screw Micromotion
Telescoping / Ratcheting Lag Screw
Semi-flexible Lag Screw Shaft
Limited / Ratcheting Sliding Through Nail
Self Locking + Telescoping Lag Screw
Expanding Ring Mechanism
Telescoping Screw Allowing Compression Only
Lag Screw Threads into Nail
Biomechanical Performance
Stronger Material
Ti-Mo
CoCr
Ti-6Al-4V
Larger Nail
Increased Stem Ø
Longer Stem
Smaller Cannulation
Concentration of Material in Key Locations
Lateral Wall
Around Lag Screw
Minimal Cannulation
