CSTi™ (Cancellous-Structured Titanium™) Porous Coating
CSTi porous coating has over 15 years of clinical experience with demonstrated success in both retrieval and long-term clinical studies.
Optimal Microstructure and Material Promote Bone Ingrowth
| CSTi porous coating combines the excellent biocompatibility of titanium with an optimal structure for bone ingrowth. CSTi is manufactured through a proprietary process that sinters commercially pure titanium powder onto a titanium- or CoCr-alloy substrate. During the process, pores are created. This results in a unique porous coating that has optimally-sized, interconnected pores¹ to allow bone ingrowth and a fine micro-roughness to provide secondary fixation. |
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| CSTi coating is sintered onto the substrate at high pressure and temperature, resulting in a solid solution at the interface of the substrate and the CSTi. This results in excellent strength and cyclic fatigue properties. |
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Cancellous-Structured Titanium refers to the microscopic appearance of CSTi porous coating. CSTi is structurally similar to human cancellous bone and provides interconnected pores for bone ingrowth. First image: Human cancellous bone.² (100X) Pore size 400-500 micrometers. Pore volume 60-77%. Second image: CSTi. (100X) Pore size 480-560 micrometers. Pore volume 52-58%.
Implant Designs Well Matched with CSTi porous Coating Technology
| We offer CSTi options with several of our product lines, including: the Natural-Knee® system, Natural-Hip™ and APR® hip stems, and Converge® CSTi Porous Acetabular components. |
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| The CSTi process was originally developed for application on a titanium alloy substrate. The Sinterlock™ process was later devised to apply CSTi onto CoCr-alloy femoral knee components. This bimetal combination was a major advancement that combined the biocompatible properties of CSTi on the bone-contacting side of the implant with the excellent wear properties of CoCr for the articulating surface. |
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Cross-Sectional Side View of Natural-Knee II Femoral Component
Demonstrating the Sinterlock Bimetal Combination of CSTi on CoCr-Alloy
Substrate. |
