8 possible problems and Countermeasures of silicone rubber taking mould 1 delamination after taking mould
Possible cause: the saliva and blood water in the mouth are not blown clean, and the first impression is polluted
Countermeasures: clean and dry the first impression
2. Angular defect after taking the mold
Possible cause: pallet in place too fast
Countermeasures: in one-step die printing, the tray and the long axis of the tooth are placed vertically and slowly
3 position error (correction of impression technology)
Possible cause: the first impression is not in the original position when it is in place again
Countermeasures: make sure the first impression is placed in the right position (mark the impression in advance)
4. Pre curing of secondary impression (double mixing technology)
Possible cause: the high temperature in the oral cavity makes the pre placed secondary impression begin to solidify before the tray is put into the oral cavity
Countermeasure: make sure that the secondary impression which has been put into the mouth has not been cured before the tray is put into the mouth
5. Curing delay (manual first impression)
Possible cause: latex gloves because sulfur compounds can affect the platinum catalyst, thus affecting curing
Countermeasures: use polyethylene or plastic gloves or handle to clean and mix
6 the second impression is too thick
Possible cause: no correction of initial impression or insufficient correction
Countermeasures: extensive revision of the first impression
7. Desorption phenomenon
Possible cause: the holding time of the second impression die is too short, leading to the phenomenon of back absorption
Countermeasures: the pressure can be reduced only after the second molding and pressing is completed and kept for at least 1 minute
8 model surface is not smooth
Possible cause: the mold filling time is too early (generally, the mold can be filled only 30 minutes after taking the mold)
Countermeasures: wait until the silicone rubber is completely cured before pouring gypsum
Accurate impression is the foundation for the smooth wearing of prosthesis
Let's see which impression you sent to the technician's office?
What kind of impression do you have?
Look at this.
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