TO EVALUATE THE LINEAR DIMENSIONAL ACCURACY OF THREE INTER OCCLUSAL RECORD MATERIALS AFTER DISINFECTION AT VARIOUS TIME INTERVALS AN IN VITRO STUDY.

TO EVALUATE THE LINEAR DIMENSIONAL ACCURACY OF THREE INTER OCCLUSAL RECORD MATERIALS AFTER DISINFECTION AT VARIOUS TIME INTERVALS AN IN VITRO STUDY.TITLE OF THE STUDY

NEED FOR STUDYINTEROCCLUSAL RECORD AND ITS RELATION.

PRECISE ARTICULATION OF PATIENTS DIAGNOSTIC OR WORKING CASTS FOR FABRICATION OF PROSTHESIS.

RISK ASSESMENT FOR DIRECT OR CROSS-CONTAMINATION.

TO ADDRESS CROSS-CONTAMINATION CONCERNS AS PER THE AMERICAN DENTAL ASSOCIATION (ADA) ISSUED GUIDELINES MORE ACCURATE REPRESENTATION OF PATIENTS MAXILLOMANDIBULAR RELATIONSHIP DUE TO THE DIMENSIONAL STABILITY

CONTENTS1. NEED FOR STUDY.2. OBJECTIVES OF STUDY.3. MATERIALS & METHODS: a) MATERIALS b) METHOD OF COLLECTION OF DATA c) SAMPLE SIZE DETERMINATION d) INCLUSION & EXCLUSION CRITERIA e) METHODOLOGY.5. STATISTICAL ANALYSIS.6. REFERENCES

TO EVALUATE THE EFFECT OF 1% SODIUM HYPOCHLORITE SOLUTION ON THE LINEAR DIMENSIONAL CHANGES OF THREE DIFFERENT INTEROCCLUSAL RECORD MATERIALS WITH STORAGE TIME OF 24 AND 48 HOURS.TO EVALUATE THE EFFECT OF 2% GLUTARALDEHYDE SOLUTION ON THE LINEAR DIMENSIONAL CHANGES OF THREE DIFFERENT INTEROCCLUSAL RECORD MATERIALS WITH STORAGE TIME OF 24 AND 48 HOURS.TO DETERMINE THE MOST ACCURATE AND DIMENSIONALLY STABLE INTEROCCLUSAL RECORD MATERIAL AFTER DISINFECTION AMONG THE TESTED MATERIALS.OBJECTIVES

MATERIALSMATERIALS NEEDED:ADDITION SILICON INTEROCCLUSAL RECORD MATERIALZINC OXIDE EUGENOL INTEROCCLUSAL RECORD MATERIALALU WAX INTEROCCLUSAL RECORD MATERIALGLUTARALDEHYDE 2 %SODIUM HYPOCHLORITE 1%WATERAUTO MIXING CARTRIDGESGLASS SLAB AND MIXING SPATULASYRINGEBARD PARKER HANDLE AND BLADE.ARMAMENTARIUM:DIE FABRICATED ACCORDING TO ADA SPECIFICATION NO 19MEASURING MICROSCOPE

5

THE FORMULA USED FOR SAMPLE SIZE ESTIMATION IS (S)=PQZ2/E2P IS THE PERCENTAGE CHANGE AFTER DISINFECTION OF THE MATERIAL.Q IS (1-P).Z VALUE IS 1.96 (STANDARD VALUE)E IS THE ERROR ESTIMATED (0.05). THEREFORE THE ESTIMATED SAMPLE SIZE WILL BE 60 FOR EACH GROUP.FOR 3 GROUPS, THE SAMPLE SIZE WILL BE 180.SAMPLE SIZE DETERMINATION

METHODOLOGY

PREPARATION OF SAMPLESPREPARATION OF METALLIC DIE AND MOLD FOR FABRICATION OF TEST SPECIMENPREPARATION OF TEST SPECIMENPLACEMENT IN DIFFERENT DISINFECTANTS FOR PARTICULAR TIME PERIODANALYSIS UNDER MICROSCOPE WITH A MICROMETRE PROVISIONSTATISTICAL ANALYSIS

PREPARATION OF METALLIC DIE AND MOLDMEASUREMENTS:

DIE: Outer diameter: 38mm Inner diameter: 30 mm Height : 31mm

MOLD: Outer diameter:38mm Inner diameter :30mm Height :6mm

RISER: Diameter :29.9mm Height :3mm

PREPARATION OF TEST SPECIMEN

ADDITION SILICONE ZINC OXIDE EUGENOL ALU WAX

CHLOROHEXIDINEGLUTARALDEHYDEWATER(CONTROL GROUP)

24HRS48HRS24HRS48HRS24HRS48HRSGROUP A (ADDITION SILICONE)GROUP B (ZINC OXIDE EUGENOL)GROUP C(ALU WAX)

GROUPING

PLACEMENT IN DIFFERENT DISINFECTANTS FOR PARTICULAR TIME PERIOD

ANALYSIS UNDER MICROSCOPE WITH A MICROMETRE PROVISION

MEASURING MICROSCOPEMEASUREMENT AT 10 X MAGNIFICATION

STATISTICAL ANALYSIS REPEATED MEASUREMENT ANOVA TEST TUKEYS POST HOC TEST

LIST OF REFERENCES1. MELILLI D, RALLO A, CASSARO A, PIZZO G. THE EFFECT OF IMMERSION DISINFECTION PROCEDURES ON DIMENSIONAL STABILITY OF TWO ELASTOMERIC IMPRESSION MATERIALS. J ORAL SCI. 2008; 50(4):441-6.

2. TEJO SK, KUMAR AG, KATTIMANI VS, DESAI PD, NALLA S, CHAITANYA KK. A COMPARATIVE EVALUATION OF DIMENSIONAL STABILITY OF THREE TYPES OF INTEROCCLUSAL RECORDING MATERIALS-AN IN-VITRO MULTI-CENTRE STUDY. HEAD FACE MED. 2012;5;8:27.

3. CARVALHAL CI, MELLO JA, SOBRINHO LC, CORRER AB, SINHORETI MA. DIMENSIONAL CHANGE OF ELASTOMERIC MATERIALS AFTER IMMERSION IN DISINFECTANT SOLUTIONS FOR DIFFERENT TIMES. J CONTEMP DENT PRACT. 2011 1; 12(4):252-8.

4. YILMAZ H, AYDIN C, GUL B, YILMAZ C, SEMIZ M. EFFECT OF DISINFECTION ON THE DIMENSIONAL STABILITY OF POLYETHER IMPRESSION MATERIALS. J PROSTHODONT. 2007; 16(6):473-9.

5. MICHALAKIS KX, PISSIOTIS A, ANASTASIADOU V, KAPARI D. AN EXPERIMENTAL STUDY ON PARTICULAR PHYSICAL PROPERTIES OF SEVERAL INTEROCCLUSAL RECORDING MEDIA. PART II: LINEAR DIMENSIONAL CHANGE AND ACCOMPANYING WEIGHT CHANGE.J. PROSTHODONT. 2004; 13(3):150-9.

6. ESTAFANOUS EW, PALENIK CJ, PLATT JA. DISINFECTION OF BACTERIALLY CONTAMINATED HYDROPHILIC PVS IMPRESSION MATERIALS. J PROSTHODONT. 2012; 21(1):16-21.7. WALKER MP, RONDEAU M, PETRIE C, TASCA A, WILLIAMS K. SURFACE QUALITY AND LONG-TERM DIMENSIONAL STABILITY OF CURRENT ELASTOMERIC IMPRESSION MATERIALS AFTER DISINFECTION. J PROSTHODONT. 2007; 16(5):343-51.