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Fixed
FCZ Adjustment after milling
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<blockquote data-quote="2thm8kr" data-source="post: 237405" data-attributes="member: 1367"><p>The first step in exocad is setting the orientation of the mesh. I use a 'bomb site' technique of looking from occlusal view and determine a path of insertion for the prep and adjacents then set that as the orientation. It's important to see if the margins in the proximal areas are obscured by the adjacent teeth. I adapted this to exocad from chairside CAD software I originally learned on.</p><p>My adjacent contacts are free formed to the color intensity needed for each client. Anything apical of the contact area is removed to avoid interferences of the insertion axis while still keeping the contact area as full as possible. In most cases this works great unless the adjacent teeth are tipped toward one another. POI isn't always occlusal to apical direction, sometimes the crowns roll in from the buccal or lingual with adjacent teeth tipped toward each other. I don't regularly use the cut intersections for proximal contacts.</p><p></p><p>Most all of my single or multiple singles in a quadrant come from IO scans so I don't have the luxury of checking them on a solid model. When I first started designing crowns with no models we had trouble with the contacts. I asked one of the guys I work closely with to take a small impression of the prep and adjacents so I could work out a technique. For the most part we have consistent results, but the mouth is a dynamic place so I will err toward a heavier proximal if I have a doubt about the case.</p></blockquote><p></p>
[QUOTE="2thm8kr, post: 237405, member: 1367"] The first step in exocad is setting the orientation of the mesh. I use a 'bomb site' technique of looking from occlusal view and determine a path of insertion for the prep and adjacents then set that as the orientation. It's important to see if the margins in the proximal areas are obscured by the adjacent teeth. I adapted this to exocad from chairside CAD software I originally learned on. My adjacent contacts are free formed to the color intensity needed for each client. Anything apical of the contact area is removed to avoid interferences of the insertion axis while still keeping the contact area as full as possible. In most cases this works great unless the adjacent teeth are tipped toward one another. POI isn't always occlusal to apical direction, sometimes the crowns roll in from the buccal or lingual with adjacent teeth tipped toward each other. I don't regularly use the cut intersections for proximal contacts. Most all of my single or multiple singles in a quadrant come from IO scans so I don't have the luxury of checking them on a solid model. When I first started designing crowns with no models we had trouble with the contacts. I asked one of the guys I work closely with to take a small impression of the prep and adjacents so I could work out a technique. For the most part we have consistent results, but the mouth is a dynamic place so I will err toward a heavier proximal if I have a doubt about the case. [/QUOTE]
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FCZ Adjustment after milling
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