cortical bone screw
A cortical bone screw is a specialized orthopedic fastener designed to secure bone fragments and fixation plates in areas where dense, compact bone tissue predominates. Unlike cancellous screws that feature wider thread patterns for softer bone, the cortical bone screw incorporates finer, shallower threads optimized for the hard outer layer of bone structure. These precision-engineered devices play a crucial role in fracture fixation, reconstructive procedures, and skeletal stabilization across various anatomical locations. The cortical bone screw features a distinctive thread design with reduced pitch and depth, allowing superior purchase in dense cortical bone without causing structural compromise. Manufacturing typically involves medical-grade stainless steel or titanium alloys, materials selected for biocompatibility, strength, and resistance to corrosion within the physiological environment. Self-tapping variants incorporate cutting flutes that eliminate pre-tapping requirements, streamlining surgical procedures and reducing operative time. Available in multiple diameters ranging from 1.5mm to 4.5mm and lengths extending from 6mm to 50mm or more, the cortical bone screw accommodates diverse anatomical requirements and surgical applications. Contemporary designs may incorporate features such as self-drilling tips, variable thread geometries, and locking mechanisms that interface with specialized plate systems. Clinical applications span traumatology, orthopedic surgery, maxillofacial reconstruction, and spinal fixation, with surgeons selecting specific cortical bone screw configurations based on anatomical location, bone quality, loading requirements, and fixation objectives. Understanding the fundamental characteristics and appropriate applications of the cortical bone screw enables medical professionals to achieve optimal surgical outcomes and promote successful bone healing.