Metal free dental implants

Metal free dental implants are ceramic dental implants which are composed of either aluminium oxide (alumina) or zirconium dioxide (Zirconia). Alumina metal-free dental implants have largely been superseded by Zirconia implants largely because of the superior physical/mechanical properties of Zirconia in environments that are similar to that found in the mouth.

Metal free dental implants

STRAUMANN PURE Ceramic implant were developed mainly for the following reasons:


Although titanium metal implants are generally regarded as safe, there are cases wherein patients developed hypersensitivity reactions to the titanium metal ions that can form in time due to wear and tear as the implant is subjected to continual stresses


The stronger titanium alloy implants that have aluminium and vanadium can also release aluminium and vanadium ions into the body for the same reason as mentioned above


Even in the absence of recognizable allergic reactions, there is a possibility that the metal ions sloughed off from metal implants can precipitate stronger immune reactions that can in turn lead to various pathologies (e.g., autoimmune and other diseases)


Bone loss at the gum line has been observed on some implant sites with metal implants


Titanium and titanium alloy implants in patients who also have amalgam fillings or metal crowns function as electrodes (with saliva and other fluids, dissolved substances, and bacterial wastes present in the mouth as the electrolytes), and voltage differentials and minute electrical currents occur between and among these metal bodies


Metal dental implants have a grey color and when they are located at the front of the jaws, they can be at times quite noticeable (and the wearer can be mistaken for an incog T-810?)


Titanium is much denser and heavier than bone while metal free dental implants have densities that are closer to that of bone, while at the same time being lighter and more wear-resistant than titanium; and finally


Initial studies seem to indicate that gum tissue remains healthier with metal free dental implants than with metal implants


Metal dental implants have a thin metal oxide layer (e.g., titanium oxide or tantalum oxide layer) on exposed outer surfaces; but wear and tear can scratch this layer and allow titanium metal to come in direct contact with the bone. Metal free dental implants are wholly composed of metal oxides and have no or negligible amounts of native metal impurities.

Because metal free dental implants have only recently become widely available, there hasn’t been sufficient time to adequately survey and measure their performance. Metal free dental implants were first approved for use and became widely available in European countries.

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