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Lab talk, the good, the bad, and the ugly
Dental-CAD
Exocad and undercuts
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<blockquote data-quote="Himanshu Sheth" data-source="post: 304806" data-attributes="member: 21804"><p>Hi guys, I am new to this forum and late to Exocad as well.</p><p></p><p>This is an old thread and a rather late reply.</p><p></p><p></p><p>Option 1:</p><p></p><p>In Valleta, you can click expert mode and then right click on the tooth with a bubble in the poured cast, or an undercut and select "Free-Form Scan Data".</p><p></p><p>You can now use a set of tools to block out on the models or trim away a missed saliva streak. Tools identical to Free-Form pattern tool. Add/Remove and Smoothen.</p><p></p><p>Option 2:</p><p></p><p>As far as blocking out undercuts is concerned, using an angle of 6 to 7 degrees worked well for me. I print my patterns to press into Emax or cast in NiCr.</p><p>As a dentist we are taught to have a minimum taper angle of 6 degrees for a successful drawing of a pattern. I applied that parameter and it does help.</p><p></p><p></p><p>Set "Dont Blockout Zone near Prepline" to "0" to reduce postprocessing.</p><p></p><p>Option 1 is more predictable</p><p></p><p></p><p>I generally prefer to make adjustments to the resin patterns (adjust undercut areas) before investing.</p><p></p><p>Hope it helps.</p></blockquote><p></p>
[QUOTE="Himanshu Sheth, post: 304806, member: 21804"] Hi guys, I am new to this forum and late to Exocad as well. This is an old thread and a rather late reply. Option 1: In Valleta, you can click expert mode and then right click on the tooth with a bubble in the poured cast, or an undercut and select "Free-Form Scan Data". You can now use a set of tools to block out on the models or trim away a missed saliva streak. Tools identical to Free-Form pattern tool. Add/Remove and Smoothen. Option 2: As far as blocking out undercuts is concerned, using an angle of 6 to 7 degrees worked well for me. I print my patterns to press into Emax or cast in NiCr. As a dentist we are taught to have a minimum taper angle of 6 degrees for a successful drawing of a pattern. I applied that parameter and it does help. Set "Dont Blockout Zone near Prepline" to "0" to reduce postprocessing. Option 1 is more predictable I generally prefer to make adjustments to the resin patterns (adjust undercut areas) before investing. Hope it helps. [/QUOTE]
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Lab talk, the good, the bad, and the ugly
Dental-CAD
Exocad and undercuts
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