RESOURCES.

We know that time is money in today’s modern dental lab.

Our aim is to get you answers to your questions as quickly as possible.

SHENPAZ RESOURCE CENTER – TRAINING AND TROUBLESHOOTING

To save you valuable time, we have posted here our library of basic training and troubleshooting resources here. Don’t hesitate to contact your local dealer or contact us if you don’t find answers to your questions on this page.

TRAINING VIDEOS

How to place sintering trays - the right way!
Degassing!
Muffle clean-up!
Operating the FOCUS4010
Sintra / SintraPlus Programming

MANUALS

Horizon 2020 user manual
Sintra Pro user manual
Sintra plus user manual
Blazir user manual
Focus-4010 user manual
Focus-HT user manual
Gemini 2020 user manual

BROCHURES

Sintra Zirconia Sintering Furnaces
Sintra Quick Start Guide
Sintra Product Brochure
Sintra Pro
Horizon Ceramic Firing & Pressing Furnaces
Horizon Quick Start Guide
Horizon Product Brochure
Gemini Furnaces Ceramic Firing & Pressing Furnaces
Gemini Quick Start Guide
Gemini Product Brochure
Focus 4010 Porcelain Firing & Glazing Furnaces
Focus Quick Start Guide
Focus Product Brochure
Focus 4010 HT Porcelain Firing & Glazing Furnaces
Focus Quick Start Guide
Focus HT Product Brochure
Blazir Zirconia Sintering Furnace
Blazir Quick Start Guide
Blazir Product Brochure
Sintra CS
Sintra CS

TROUBLESHOOTING

Click on a symptom to see the possible cause and suggested solution.

Metals
Porosities, cavities or fractures in the metal framework
  • Sprucing recommendation by manufacturers or recommendations on pre-heating and casting temperatures were overlooked.
  • Check manufacturer request for casing metal and investment.
Ceramic shades are too bright and too opaque
  • Preheating temperature is set too high.
  • Decrease preheating temperature.
Ceramics
Ceramic material is too porous
  • Firing temperature is too low.
  • Increase firing temperature.
  • Vacuum pump was actuated too late.
  • Decrease preheating or vacuum temperature.
  • Attained vacuum value is too low.
  • Check vacuum pump for leaks.
Ceramic surface too rough.
  • Firing temperature too low.
  • Increase firing temperature.
Ceramic surface has too little luster.
  • Holding time too short.
  • Extend holding time.
Ceramic surface has too much luster.
  • Firing temperature is too high.
  • Decrease firing temperature.
Edges and contours are not clearly defined but round.
  • Holding time is too long.
  • Shorten holding time.
Cracks caused by compression: horizontal cracks in the incisal
  • Incorrect procedure with ZR.
  • Use suitable tool for working on ZR.
  • Over heating in some area of the press ceramic during processing.
Region or in the bridge pontic
  • Extend cooling required by manufacturer of ceramic or metal but was not implemented.
  • Check CTE of the alloy/use 3 minutes at 850C°; cooling required if CTE > 14.2 (standard)
  • Cooling temperature is too low.
  • Increase cooling time.
  • Cooling temperature too short.
  • Extend cooling duration/phase.
Cracks caused by tension
  • Incorrect alloy used.
  • Check alloy compatibility (CTE).
Pressables
The object is not completely pressed
  • Insufficient material quantity.
  • Calculate weight of wax including sprues to determine the number of ceramic ingots.
  • Wax layer is too thin.
  • Minimum wax layer should be 0.5 mm.
    Press temperature is too low.
  • Slowly increase temperature to find ingot melting point.
  • This will vary between different furnaces so this should be adjusted by trial and error.
  • Press time too short.
  • Increase pressing time.
  • Press pressure too low.
  • 4.5 Bar for 1x and up to 5.5 Bar for 2x.
Press streaks on the margins of crown
  • Incorrect sprueing.
  • Inlays with margin should be facing to the outside and at the same height; also minimum of 3 mm sprue and as short as possible.
Press steaks on wax objects and the press sprues
  • Crack in the investment materials.
  • Adhere to the working instructions, observe setting time and correct ratio of water and liquid.
Burst investment ring after pressing
  • Ring is not parallel to the plunger. Pressure or temperature is too high or insufficient wall of the investment.
  • Check parallelism of the cylinder. Check program parameters and keep 10mm from the border of the cylinder.
Crack in the press ceramics
  • Incorrect procedure with ZR.
  • Use suitable tool for working on ZR.
  • Over heating in some area of the press ceramic during processing.
  • Decrease temperature and increase preheat.
  • Excessive blasting during devestment.
  • Sandblast, 50 micron at max 2 Bar.
  • Wax did not totally burn off.
  • Use wax adapted to pressing system.
  • Incorrect sprueing.
  • Ensure correct sprueing.
Bubbles in the press ceramics
  • Press temperature too high.
  • Reduce press temperature.
  • Wax didn’t totally burn off.
  • Change wax to one adapted to pressables.
  • ZR was not cleaned correctly before waxing.
  • Clean ZR before waxing.
Inclusion of investment into the press element
  • Sprues were not waxed properly.
  • Ensure smooth transition of short and big sprues.
  • Edges are too sharp.
  • Ensure smooth transition of short and big sprues.
Discoloration and white spot
  • Press temperature is too high.
  • Try with lower temperature for a longer time.
  • Check wax bonder or liner.
  • Use only products adapted for top press systems.

About Us

Shenpaz offers lucrative partnering opportunities to sales professionals in the lab equipment industry throughout the world.

Certs

Privacy Policy
Quality & Safety

Join our newsletter

Be the first one to know - join our newsletter

+972(0)4 666-6902

.

info@shenpaz.com

Design: Studio Bahir

Skip to content