Glass Ionomer Restoration Part 1 PDF

Glass Ionomer Restoration (1) By: Dr. Rehab Alwakeb Operative Dentistry Division Reference:  Phillips science of dental materials 11th edition.  Craig's restorative dental materials. 13th edition.  Art and science of dental materials 6th edition (chapter 10). ILOs: I. Determine the chara...

Glass Ionomer Restoration (1) By: Dr. Rehab Alwakeb Operative Dentistry Division Reference:  Phillips science of dental materials 11th edition.  Craig's restorative dental materials. 13th edition.  Art and science of dental materials 6th edition (chapter 10). ILOs: I. Determine the characteristics, indications, contraindications and manipulation techniques of glass ionomer restorative material. outline Conventional glass ionomer GIC: 1. Definition. 2. Composition. 3. Setting reaction. 4. Properties, advantages and disadvantages.  v inp A water based material which is formed as a product of an acid-base reaction between the basic calcium-fluoro-aluomino-silicate glass FAS powder and an aqueous solution of polyacid. Tcontaining Composite polymerization Amalgam chemicalamalgamation GlassIonomer Acidbasereaction polyacid FAS up Q J  vimpf prormaint Bothnames  vinp ions Dissociatesinto ring vimp contheperupheryi formationof 0 nnri.it  Lorns organic matrix  imp imp  material which m  maned s ALL y understand o  The set cement is thus formed of un- reacted glass particles surrounded by silica hydrogel dispersed in an amorphous matrix of hydrated Ca and Al polysalts.  podgarticles ureacted  pimp This results in: 1. Decrease strength & Weakened restoration 2. Loss of translucency & Increased opacity (poor esthetics and liability to staining) 3. Leakage. Gingiva h pulp Conditioner used instead w̅ of.eet chemical physically physical changesstaff change of structure  r omp Q understand polymerization shrinkage main Disadvan ofcomposite main Advantageof GI apad to Composite minimal shrinkage Betterformoreloss Composite friction GI Highstress Class  RMG understand understand bs up PQ more technique sensitive 11 Composite 2 GI conventional 3 RMGI Thank You