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Ask UsDense-PTFE Membrane vs. Expanded-PTFE Membrane ?
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Bone Grafting, Tissue Regeneration, Ridge Augmentation
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Gdoc, a dental student, asks:
I am a dental student and I am trying to figure out the difference between a dense-PTFE membrane and a expanded-PTFE membrane. What exactly is the difference? Is it the pore size? Or is it that one is meant to be left exposed and the other needs to be covered?Please clarify. Thanks
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5 Responses to “ Dense-PTFE Membrane vs. Expanded-PTFE Membrane ? ”
You are correct. The manufacturing process of high density PTFE decreases the pore size to .2 microns, making the material impervious to bacteria. Primary closure is not required, and not desired, making the membrane removal easy and painless. The studies in the past using e-PTFE yielded the best results in terms of bone regeneration compared with resorbable products(Buser), however the exposure rate was very high leading to biomaterial centered infections and complications. The d-PTFE yields comparable results. (Greenwell)
In my practice i have good results with cytoplast dense PTFE membrane. Much better bone preservation and tissue responce than to resorbable membranes. Price is better is better too.
remember when resorbable membranes resorb, they resorb with an inflammatory response, that leads to some resorption. Even through hydrolysis of polylactic acid (resorbable plates and membranes) there is evidence of inflammation in there resorption processes.
while on the topic ,can collatape be used as an effective barrier membrane? If not ,why not ?
Where does one buy the d- PTFE. Is this a membrane from gore-tex?
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