University:
Coventry University
Course:
115 BMS | Introduction to Biomedical Analysis
Academic year:

2024
Views:

464

Pages:

3
Author:

Badusha S

Iwat linkage:- Dilect technique Type I: hard inlay Wax 15 Softened by dey heat, ie waving Carefully omra flame, direfly adopted on the prepared tooth - then carved. taken out & invested. Inlay wax have large COTE of at 300-100 ppm/°c + under yor large thermal contra abt 0.3-0.9% When cooled from 37°c to loom Herop. [Causes discrepaney] direct technique:- - It is inconvenient to carve the war pattern, in the mouth, it is Merepued outside the mouth, - Accurate mop of peup of peel paed low th obtained by double mux tech with elastomers + haed deer made by TyneV CIP (due stoni Tunge T05 COTE-150-22 Sppe causing thermal signage in addition to polymeric Shinka → this thermal contraction of liquid B Solidifralon Shinkages Shinkages alee alle Coro co automatically compensated by the extra lig present * for low firing (900-1000℃) Shrinkages allele abt 1-3-16%. #fol with furring (1200-1150°c) PBM alloy abt 2-2.3%。 total casting Shenloage= Waxshinkey + Alley shrinkey. 1) for low fusing HN & Nalloys را 1.6-1.8% (2) for high fusing PBM alloy 5 2.3-2.5% causes melt of cast & need to be compensated Seling expansion + gypsuna9B 1 Mater NSE I to abt 0.3-0.5%, by ↓W/Peed to ↓ chemo impure I mixing time Using fresh stock. HSE T laeg values (1-2-by by lay patio - chrome impurities ↑ringtone. Using Puesh, it ate tel and added watel cortechnique after initial saling. Thermal expansioni- depend upon compo & comprised RM "quartz, tridymite, cuartobulide/ amorphous quartz - Inullos kom low a form to high fam at high temp also produce expansion which add up to thermal expansion. Thermal expansion -Ceistobalile = 17% fused quart-0.05% quartz 197- -Tridymite-0-76