Replies to post #23089 on SiNtx Technologies Inc (SINT)

[boston745]

First case report of vanadium metallosis after ceramic-on-ceramic total hip arthroplasty

https://www.ncbi.nlm.nih.gov/m/pubmed/24382188/

Isnt Vanadium part of titanium alloys?

I'm not sure what it is but my guess is ZTA particles act as an abrasive on metal stems and cups leading to increased wear.

An extreme example is a CoC fracture being relaced by MoM or Mop implant. The excessive ZTA particles increase wear of the metal head immensely causing major systemic disruptions and even death.

[boston745]

Third-body Wear Damage Produced in CoCr Surfaces by Hydroxyapatite and Alumina Ceramic Debris: A 10-cycle Metal-on-Metal Simulator Study

Surface-roughness ranking after 10-second abrasion test revealed that bone cement and hydroxyapatite produced least damage to CoCr surfaces while alumina produced the most. Alumina increased surface roughness 19-fold greater than either hydroxyapatite or bone-cement particles. The alumina debris produced numerous scratches typically 20-80 µm wide with some up to 140µm wide. Surprisingly the alumina beads and flakes were pulverized within the 10-second test interval and remained adherent to the CoCr surfaces. Additionally, the hydroxyapatite although also a ceramic had no more effect on CoCr than the bone-cement debris. Use of well-characterized and commercially available alumina and hydroxyapatite powders appeared advantageous for abrasion tests. These new data indicated that such ceramic powders have merit.

https://reconstructivereview.org/ojs/index.php/rr/article/view/129/159