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Lab talk, the good, the bad, and the ugly
Dental-CAM
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<blockquote data-quote="2thm8kr" data-source="post: 261811" data-attributes="member: 1367"><p>I don't recall saying margins aren't important. It is a metric that has been beaten into our heads by our mentors and their's before them. IT was extremely important to have the margins as closed as possible to keep the adhesives from washing out over time. Newer adhesives are less prone to that.</p><p></p><p>I can show you xrays of pfm crowns that have been in the mouth for over 2 decades that have the sh!ttiest open margins you have ever seen. They are still there and no recurrent decay present. I can also show you xrays of crowns with closed margins that have decay around the marginal areas and underneath the crown, the crowns have only been in for a year or two. Has more to do with ph level in the patient's mouth than open or closed margins as well as the bacterial flora in the patient's mouth.</p></blockquote><p></p>
[QUOTE="2thm8kr, post: 261811, member: 1367"] I don't recall saying margins aren't important. It is a metric that has been beaten into our heads by our mentors and their's before them. IT was extremely important to have the margins as closed as possible to keep the adhesives from washing out over time. Newer adhesives are less prone to that. I can show you xrays of pfm crowns that have been in the mouth for over 2 decades that have the sh!ttiest open margins you have ever seen. They are still there and no recurrent decay present. I can also show you xrays of crowns with closed margins that have decay around the marginal areas and underneath the crown, the crowns have only been in for a year or two. Has more to do with ph level in the patient's mouth than open or closed margins as well as the bacterial flora in the patient's mouth. [/QUOTE]
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Lab talk, the good, the bad, and the ugly
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