Dental Crown Chip Off

Posted by Zahnsply . 25/11/2014 2 Comment(s) Chipping Of Dental Crown,



Please check the following which could have caused the problem:



• Please measure the Wax Pattern when you doing the Wax Modulation, It should be 0.3mm after Finishing of Metal.

• Never mix alloys.




• You must Take care of Sharp Edges in Metal Framework, Always prefer U shape Modellation of Interdental Space.





• Do not use more than one third of old metal.


• Always Prefer Indirect Spruing Technique

• Metal Framework should be Homogeneous.



• Always prefer to Use Clean Sandblasting Material and prefer to Use 50- 250 Micron Aluminium Oxide depending on the Alloy (Observe Manufacturer’s Instruction).


• Always prefer Cross-Cut tungsten Carbide Burs for Finishing of Metal in One Direction


• Do not Use Diamond Abrasive or Diamond Coated Burs for Finishing of Metal.



• Finish Metal Properly, Remove all the Investment Particles from the Metal Framework.



• Please refer the Correct Firing Parameter (Manufacturers Firing Table)


VITA VMK Master Firing Programme.



• Grind the surface of the ceramic with diamond abrasives.Make sure the ceramic does not get too hot.




• Please Avoid Direct heat when you are baking the Ceramic. Always prefer Lift Position in dryingprocess when you are firing the Ceramic.








2 Comment(s)

Dr. Hemant:
25/11/2014, 04:59:39 AM

Good Knowledge Work. Good Job Kapil

29/11/2014, 01:49:11 AM

Thank you Sir

29/11/2014, 01:49:14 AM

Thank you Sir

Dr. Rajvir Singh:
28/11/2014, 04:31:08 AM

Good information. Must be read out to every dentist and Lab Technicians also.

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