26/01/2026
When pe*******on accuracy and trajectory stability become critical, tip geometry plays an even more decisive role, especially when interacting with rigid or highly resistant tissues.
3️⃣ Diamond Tip
The diamond tip is commonly used in orthopaedic applications and bone biopsy devices, where controlled pe*******on of rigid structures is required.
Geometry:
· Symmetrical design
· Typically composed of four cutting faces (or two opposing pairs of facets)
· Forms a pyramid- or diamond-shaped tip with a balanced cutting profile
Cutting characteristics & mechanical behaviour:
· Multi-directional cutting action, engaging the material uniformly
· Controlled advancement with high precision along the insertion axis
· Limited needle deflection, due to symmetric force distribution
Symmetrical tip geometries, such as the diamond point, are associated with improved trajectory stability and reduced deflection during insertion, as observed in experimental studies on needle–tissue interaction.