Take 1 Advanced Troubleshooting Guide
Contents
1. Solution e Use Expasyl retraction paste to open sulcus and help maintain dry field e Use hydrophilic wash material e Select tray viscosity with adequate compression Solution e Keep tip buried in material during filling e Fill in continuous path do not layer material e Use automated mixing machine for tray viscosity CKerr Problem Evidence Cause Solution Tooth contact with e Visible e Incorrect size tray e Verify tray has enough room for 2 mm of impression tra impingement e Tray seating not aligned material between tooth and tray walls with dentition CKerr2. Take 1 Advanced Troubleshooting Guide Here you ll find some common impression taking problems We ll explain what may be causing the problem along with troubleshooting tips To receive a custom recommendation try the Impression Material Product Selection Guide Learn more about Take 1 Advanced Problem Premature set ES Problem Deformation dimensional change Problem Tearing at margin Problem Surface inhibition or non set Evidence e Abrupt change from heavy to light body material e Muted detail around margin Evidence e Crowns too tall short e Open contacts e Crown will not seat Evidence e Visible tears at margin e Lack of flash extending apically around entire preparation Evidence e Unset or mottled surface around preparation e Lack of detail e Shiny wet appearance Cause e Set time of wash tray material not synched e Exceeded working time of material Cause e Insufficient mix of material e Impression removed too early e Tray movement after seating e Insufficient material elasticity e Fluid absorption during disinfection process Cause e Material has insufficient tear strength e Presence of severe undercuts e Insufficient sulcular expansion Cause e Contamination due to latex gloves direct contact with material or residue left on teeth e Contamination due to temporary materials or composite e Expired material or exceeded material shelf life So
3. lution e Begin mix of heavy and light viscosity concurrently e Verify set times for heavy and light viscosities match e Observe working time of materials Solution e Verify material is adequately mixed before seating and completely set prior to removal e Use passive force to maintain tray position when using open bite technique e Verify no tooth contact with tray sides or impingement in closed bite technique e Choose material with adequate elasticity e Follow disinfection protocol carefully Solution e Use material with adequate tear strength e Consider blocking out undercuts especially in cases with gingival recession e Ensure at least 5 mm sulcular expansion Solution e Use latex free gloves when handling VPS material e Rinse preparation area thoroughly after using other restorative materials e Use automated mixing device to minimize exposure to contaminants e Do not use expired material CKerr Problem Poor model detail Problem Voids in wash material Problem Insufficient or excessive compression Problem Incomplete margin Problem Voids in tray material Evidence e Small bubbles indentations in cast e Powdery cusps Evidence e Visible voids in wash material around tooth preparation Evidence e Insufficient wash material flows away from preparation area e Excessive wash material displaced from preparation area burn through Evidence e Voids o
4. r jumps on margin Evidence e Visible voids in set impression e Tearing of impression e Poor fit at seating Cause e Release of hydrogen gas from VPS impression after pouring cast e Tooth contact with mesh lining of closed bite impression tray Cause e Bubbles incorporated into material during mixing or loading syringe e Bubbles incorporated while syringing material intraorally Cause e Insufficient compression of wash material from adjacent tooth tray or heavy body material e Excessive compression of wash material due to high viscosity of tray material Cause e Inadequate tissue management e Contamination from intraoral fluids e Insufficient compression of wash material Cause e Introducing bubbles when filling tray layering material e Introducing bubbles when mixing material by hand Solution e Follow manufacturer instructions regarding any delays for pouring models after taking impression e Place cotton roll on contra lateral side when using closed bite trays to prevent direct tooth contact with tray this prevents water from leaching through tray after cast has been poured Solution e Use automix systems e Syringe material intraorally in continuous stream around each preparation do not lift syringe tip from material Solution e Use tray viscosity material with greater compressive force or use custom tray e Use tray material with lower viscosity to avoid displacing wash material
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