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Lab talk, the good, the bad, and the ugly
Dental-CAD
scanner in a dentist office
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<blockquote data-quote="CoolHandLuke" data-source="post: 239094" data-attributes="member: 4850"><p>if you did read the whole study you'll find it is riddled with imprecision.</p><p></p><p>instead of empirically testing on an object with known geometry, or comparing scans with industrial grade scanning used by CNC machines the world over, they went full invitro.</p><p></p><p>so how are we to know how they arrived at their conclusions of single digit accuracy? short answer is, we can't.</p><p></p><p>there is no way to do these ridiculously high detail QA measurements in the mouth. the machine that is capable of this kind of scan and empirical data analysis does not fit in the palm of your hand and will not compare two contours that have been scanned at different co-ordinate systems.</p><p></p><p>simply put, the whole study is one of those things idiots use to convince themselves of something they already assumed to be true.</p><p></p><p>its not worth your serious consideration.</p><p></p><p>there is no way they arrived at these numbers in their graph without taking it to the proper industrial tools for an absolute rigorous runaround. using something like a shapegrabber, or cybergage system. where scans and cad are instantly compared to each other.</p></blockquote><p></p>
[QUOTE="CoolHandLuke, post: 239094, member: 4850"] if you did read the whole study you'll find it is riddled with imprecision. instead of empirically testing on an object with known geometry, or comparing scans with industrial grade scanning used by CNC machines the world over, they went full invitro. so how are we to know how they arrived at their conclusions of single digit accuracy? short answer is, we can't. there is no way to do these ridiculously high detail QA measurements in the mouth. the machine that is capable of this kind of scan and empirical data analysis does not fit in the palm of your hand and will not compare two contours that have been scanned at different co-ordinate systems. simply put, the whole study is one of those things idiots use to convince themselves of something they already assumed to be true. its not worth your serious consideration. there is no way they arrived at these numbers in their graph without taking it to the proper industrial tools for an absolute rigorous runaround. using something like a shapegrabber, or cybergage system. where scans and cad are instantly compared to each other. [/QUOTE]
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Lab talk, the good, the bad, and the ugly
Dental-CAD
scanner in a dentist office
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