Cortical Screw 4.5mm Dia. (SS316L)

The Cortical Screw 4.5mm Diameter (SS316L) is a standard orthopedic implant designed for firm fixation in cortical (dense) bone. Manufactured from implant-grade stainless steel (SS316L), it provides high mechanical strength, corrosion resistance, and reliable long-term performance in trauma and reconstructive procedures.

�� Example Product4.5mm Cortical Screw Self-Tapping Stainless Steel₹586•amazon.inKey FeaturesDiameter: 4.5mmThread Type: Fine pitch (closely spaced threads for dense cortical bone)Material: Implant-grade Stainless Steel (SS316L)Design: Fully threaded shaft for maximum bone engagementTip: Self-tapping or non-self-tapping variants availableDrive Type: Typically hexagonal or star (depending on system)Available Lengths: Usually 10mm to 80mm+Product HighlightsFine thread design ensures strong grip in hard cortical bone with high resistance to looseningHigh mechanical strength allows the screw to withstand insertion torque and load-bearing conditionsSelf-tapping option reduces surgical steps by cutting threads during insertionFull-thread configuration provides uniform fixation across both corticesSS316L material offers excellent corrosion resistance and biocompatibilityIndications / UsesFixation of diaphyseal (shaft) fracturesLong bone fracture stabilization (e.g., femur, tibia, humerus)Fixation with plates (4.5mm system / DCP / LC-DCP / LCP)Orthopedic trauma and reconstructive surgeriesApplicationsPlate fixation systems (non-locking and locking constructs)Bicortical fixation (engaging both cortices for maximum stability)Use as lag screw when required (with over-drilling technique)Working Principle

Cortical screws convert rotational torque into axial compression force, holding fracture fragments together. Their fine threads and low pitch increase the number of threads engaging dense cortical bone, enhancing fixation strength and stability.

Clinical InsightCortical screws are specifically designed for hard outer bone (cortex), unlike cancellous screws which are used in spongy boneProvide high stability and rigidity, especially in load-bearing bones

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Cortical vs Cancellous screw difference (with images)Titanium vs SS316L comparisonCatalog table format / brochure design