NEET MDS Shorts
384340
Dental MaterialsOccurence of carbon contamination from investment can easily be observed in case casting temp. are high as seen in melting of high noble alloys for metal ceramic (eg. AgPd or Pd-Ag alloys) or base metal alloys.
Such contamination embrittles the alloy.
531511
Dental MaterialsZnO is a filler in Gutta Percha, and it improves the strength and flexibility of the material.
610122
Dental MaterialsA condenser that is considered user-friendly typically has a high elastic limit and high springiness, allowing for better control and easier placement of the restorative material.
284133
Dental MaterialsAccording to the text, the mixing time for zinc phosphate cement is about 1-15 minutes.
772748
Dental MaterialsAn obtundent is used to reduce post-operative sensitivity by sealing the dentinal tubules and protecting the pulp.
560264
Dental MaterialsGIC has a thermal expansion coefficient of 13-16 PPM/°C which is quite close to the values of dentin (8-11 PPM/°C). This similarity helps in reducing marginal leakage.
945109
Dental MaterialsThe n' phase in high-copper amalgams is associated with the formation of CuCl23Cu(OH)2.
404787
Dental MaterialsWhile great for temporary cementation, its primary disadvantage for permanent use is its potential to cause tooth discoloration and pulpal irritation.