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8 Venners Over Discolored Teeth
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<blockquote data-quote="disturbed" data-source="post: 46916" data-attributes="member: 4763"><p>yes, I thought you meant layering on, my apologies.</p><p></p><p>just curious paul, why does it say </p><p> "minimum thickness for IPS cutback tech. 0.4"</p><p>and </p><p> "minimum thickness for press and stain tech 0.3-0.6"</p><p>for anteriors in the </p><p> <strong><u>E MAX MANUAL</u></strong></p><p><strong>Failure to observe the stipulated framework design criteria <u>and minimum thicknesses</u> may result in clinical failures, such as</strong></p><p><strong>cracks, delamination and fracture of the restoration.</strong></p><p> The following minimum thicknesses have to be observed to match the tooth colour of the shade guide and to fulfil the</p><p>requirements of the preparation guidelines:</p><p>Overall Thickness of the</p><p>Restoration in mm 0.8 1.0 1.2 1.5 1.8 2.0 2.5 3.0</p><p>Minimum Framework Thickness</p><p>of IPS e.max Press in mm 0.4 0.5 0.6 0.8 1.0 1.1 1.3 1.6</p><p>Minimum Layer Thickness of</p><p>the Veneer with IPS e.max 0.4 0.5 0.6 0.7 0.8 0.9 1.2 1.4</p><p>Ceram in mm</p><p>For the cut-back and layering techniques, the relationship of the layer thickness between IPS e.max Press (framework) and IPS e.max</p><p>Ceram (veneer) must also be observed:</p><p></p><p></p><p>Table</p><p>Tops</p><p>Thin</p><p>Veneers</p><p>Veneers Inlays Onlays Partial</p><p>Crowns</p><p>Anterior</p><p>Tooth</p><p>Posterior</p><p>tooth</p><p>Anterior</p><p>Region</p><p>Premolar</p><p>Region</p><p>1.0</p><p>1.0</p><p>–</p><p>–</p><p>–</p><p>–</p><p>–</p><p>–</p><p>–</p><p>–</p><p>–</p><p>–</p><p>–</p><p>–</p><p>0.7</p><p>0.4</p><p>–</p><p>–</p><p>–</p><p>–</p><p>1.0</p><p>isthmus width</p><p>1.0</p><p>fissure area</p><p>–</p><p>–</p><p>–</p><p>–</p><p>–</p><p>–</p><p>1.0</p><p>isthmus width</p><p>1.0</p><p>fissure area</p><p>–</p><p>–</p><p>–</p><p>–</p><p>–</p><p>–</p><p>1.5</p><p>1.5</p><p>1.5</p><p>0.8</p><p>–</p><p>–</p><p>–</p><p>–</p><p>1.2</p><p>1.5</p><p>1.2</p><p>0.4</p><p>0.6</p><p>0.6</p><p>–</p><p>1.5</p><p>1.5</p><p>1.5</p><p>0.8</p><p>0.8</p><p>0.8</p><p>–</p><p>1.2</p><p>1.5</p><p>1.2</p><p>0.8</p><p>0.8</p><p>0.8</p><p>16mm2</p><p>1.5</p><p>1.5</p><p>1.5</p><p>0.8</p><p>0.8</p><p>0.8</p><p>16mm2</p><p>Minimum</p><p>Thickness</p><p>IPS e.max Press</p><p>Staining</p><p>Technique</p><p>Minimum Thickness</p><p>IPS e.max Press</p><p>Cut-Back Technique</p><p>(after reduction)</p><p>Minimum Thickness</p><p>IPS e.max Press</p><p>Layering Technique</p></blockquote><p></p>
[QUOTE="disturbed, post: 46916, member: 4763"] yes, I thought you meant layering on, my apologies. just curious paul, why does it say "minimum thickness for IPS cutback tech. 0.4" and "minimum thickness for press and stain tech 0.3-0.6" for anteriors in the [B][U]E MAX MANUAL[/U][/B] [B]Failure to observe the stipulated framework design criteria [U]and minimum thicknesses[/U] may result in clinical failures, such as cracks, delamination and fracture of the restoration.[/B] The following minimum thicknesses have to be observed to match the tooth colour of the shade guide and to fulfil the requirements of the preparation guidelines: Overall Thickness of the Restoration in mm 0.8 1.0 1.2 1.5 1.8 2.0 2.5 3.0 Minimum Framework Thickness of IPS e.max Press in mm 0.4 0.5 0.6 0.8 1.0 1.1 1.3 1.6 Minimum Layer Thickness of the Veneer with IPS e.max 0.4 0.5 0.6 0.7 0.8 0.9 1.2 1.4 Ceram in mm For the cut-back and layering techniques, the relationship of the layer thickness between IPS e.max Press (framework) and IPS e.max Ceram (veneer) must also be observed: Table Tops Thin Veneers Veneers Inlays Onlays Partial Crowns Anterior Tooth Posterior tooth Anterior Region Premolar Region 1.0 1.0 – – – – – – – – – – – – 0.7 0.4 – – – – 1.0 isthmus width 1.0 fissure area – – – – – – 1.0 isthmus width 1.0 fissure area – – – – – – 1.5 1.5 1.5 0.8 – – – – 1.2 1.5 1.2 0.4 0.6 0.6 – 1.5 1.5 1.5 0.8 0.8 0.8 – 1.2 1.5 1.2 0.8 0.8 0.8 16mm2 1.5 1.5 1.5 0.8 0.8 0.8 16mm2 Minimum Thickness IPS e.max Press Staining Technique Minimum Thickness IPS e.max Press Cut-Back Technique (after reduction) Minimum Thickness IPS e.max Press Layering Technique [/QUOTE]
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