STENCILDENT

          ZINC POLYCARBOXYLATE  CEMENT  INTRODUCTION: Zinc polycarboxylate cement s also known as zinc polyalkalonic acid or zinc polyacrylate . Zinc polycarboxylate cement has good thermal insulation property  ADA SPECIFICATION NUMBER for zinc polycarboxylate cement is 96 It can be used as cavity liner or base for amalgam restoration where cavity with remaining dentin thickness greater than 0.5mm. 1)COMPOSITION: POWDER - ZINC OXIDE  (90%),MAGNESIUM OXIDE (10%) STANNIC OXIDE may be substituted in the place of magnesium oxide ,BISMUTH OXIDE ,ALUMINUM OXIDE . LIQUID - Polyacrylic acid, Itaconic acid and other un saturated tricarboxylic acid   2)POWDER /LIQUID RATIO : Restorative purpose : 1:1 Luting purpose :1:2 3)SETTING REACTION : Surface dissolution of powder by acid releasing ,binds to polymer chain via carboxyl group further react to carboxylic group of adjacent polyacid chain . 4)SETTING REACTION TIME :6-9 MINUTES 5)WORKING TIME : 2.5 MINUTES  6)MANIPULATION : Powder /liquid is dis

 Zinc Phosphate Cement ADA Specification number of Zinc Phosphate is 96. Zinc phosphate cement was originally developed more than 100 years ago and was extremely popular during most of the twentieth century. CLASSIFICATION: TYPE 1 : Fine grained for luting Type 2: medium grained for luting and restorative purpose. COMPOSITION: Zinc Phosphate cement contains  powder and liquid containers which comes separately. powder: zinc oxide 75%,magnesium  oxide 13%,silicone dioxide-2%,bismuth trioxide-0.1% liquid: phosphoric acid 38-59% in water 30-50% and is buffered with aluminium and zinc salts to control the ph.,zinc- 7%,aluminium-2% CHEMISTRY AND  SETTING : REACTION TYPE- ACID-BASE REACTION SETTING REACTION: Phosphoric acid dissolve in zinc oxide react with aluminum phosphate to form zinc aluminophosphate gel on undissolved zinc oxide particles  set cement: unreacted zinc oxide particles gets encased in amorphous matrix of zinc aluminophosphate. loss of water from liquid increases the settin

  CONFIGURATION FACTOR ( C- FACTOR)  IN COMPOSITE  It is a three dimensional configuration of a prepared cavity. c - factor was introduced by feilzer in the year 1987 Configuration factor is calculated by the number of bonded surface to unbounded surface . composite resin undergo  polymerisation shrinkage : polymerisation shrinkage is a process that occurs when resin gets cured. stress generation along bonded area as they are bonded  micro mechanically free surface - free flow of composite thereby decreasing stress.   NOTE: REFER THE ABOVE IMAGE - In order to get a better understanding on bounded and unbounded surface in a prepared. cavity  REASONS FOR POLYMERISATION SHRINKAGE When composite resin gets cured ,during  the polymerisation process since monomeric particles are more voluminous than polymer ,moneric chains gets unbounded vanderwal force of interaction gets converted to covalent bond. matrix generally shrink from cavity wall,material cure towards the centre of bulk pulls mate

HAND INSTRUMENTS PART 3 CONTENTS: NON CUTTING RESTORATIVE INSTRUMENT 1) CEMENT SPATULA 2) PLASTIC SPATULA 3) PLASTIC INSTRUMENT 4) AMALGAM CARRIER 5) CONDENSOR Vanakam   , Stencildent family Previous 2 post were about :       1)   Exploratory instrument: https://www.stencildent.com/2020/07/hand-instruments-in-operative-dentistry.html 2) Cutting instrume nt: https://www.stencildent.com/2020/07/hand-instruments-used-in-conservative.html Here comes the 3 rd part, as I have already mentioned in contents we will be discussing about non cutting instrument along with picture.                                                     CEMENT SPATULA  PLASTIC INSTRUMENT  AMALGAM CARRIER  CONDENSOR  CARVERS BURNISHER  NON CUTTING RESTORATIVE INSTRUMENT   Feel free to comment down your valuable suggestion                                                   THANK YOU 

                      STAGES AND STEPS IN                                        TOOTH  PREPARATION                 TOOTH PREPARATION INVOLVES 2 STAGES  1) INITIAL TOOTH PREPARATION:    OUTLINE FORM AND INITIAL DEPTH PRIMARY RESISTANCE FORM  PRIMARY RETENTION FORM CONVENIENCE FORM 2) FINAL TOOTH PREPARATION  REMOVAL OF REMAINING CARIES PULP PROTECTION SECONDARY RESISTANCE AND RETENTION FORM FINISHING OF EXTERNAL WALL FINAL PROCEDURE OF CLEANING AND INSPECTING  Each stage and step is explained in detail please refer to above notes . note:please do not  download and share all rights are reserved to stencildent.

                          TERMINOLOGIES IN PRECLINICAL                                  CONSERVATIVE AND ENDONDONTICS    GLOSSORY OF TERMS AVAILABLE :  1)  OPERATIVE DENTISTRY 2) DENTAL CARIES 3) TOOTH PREPARATION  4) ENAMELOPLASTY 5) SIMPLE TOOTH PREPARATION 6) COMPOUND TOOTH PREPARATION 7) COMPLEX TOOTH PREPARATION 8) INTERNAL WALL 9) EXTERNAL WALL 10)  FLOOR OR SEAT 11) AXIAL WALL 12) PULPAL WALL 13) DENTINAL WALL 14) LINE ANGLE 15) POINT ANGLE 16)  CAVOSURFACE ANGLE 17)  CAVOSURFACE MARGIN  18)  BUTT JOINT 19 ) UNSUPPORTED ENAMEL 20)   MO CAVITY  21) MOD CAVITY 22) REVERSE CURVE 23) DOVETAIL 24 ) ISTHMUS 25) BOX ONLY TOOTH RESTORATION  26)TUNNEL TOOTH PREPARATION  27)BEVEL 28)CIRCUMFERENTIAL TIE  29)HYBRID LAYER 30) REMAINING DENTIN THICKNESS    THANKS FOR READING  NOTE: DOWNLOADING AND UPLOADING MY NOTES IS STRICTLY PROHIBITED AND SE