Evaluation The Effect Of Addition Some Disinfectants Solutions On Compressive Strength Of Dental Stone

Yasameen Ibrahim Mahbas ياسمين ابراهيم

Tikrit Journal for Dental Sciences مجلة تكريت لعلوم طب الاسنان
ISSN: 20731213 Year: 2015 Volume: 3 Issue: 1 Pages: 39-44
Publisher: Tikrit University جامعة تكريت


It's necessary to disinfectant the stone cast that poured in the impression to reduce the risk of bacteria & microorganism on the dentist technicians and patient .In this study uses the sodium hypochlorite & chlorohyxidine as disinfectants solutions concentration were (5%) .The purpose of this study is to evaluate the effect of addition these disinfectants solutions on compressive strength of dental stone type III .A total number of the study stone specimens were 30 and they were divided in three groups, (10) specimens for each group .The testing groups were prepared and divided into three groups according to the concentrations of sodium hypochlorite (5%) and chlorohyxidine (5%) :-Group A : stone specimens were mixed with distilled water .Group B : stone specimens were mixed with (5%) sodium hypochlorite solution .Group C : stone specimens were mixed with (5%) chlorohyxidine .The size of the specimen is (20mm) diameter and (40mm) length .The shape of specimen is cylinder .The test specimens are measured by (WDW. 200E) .A brass mold in (20mm) diameter and (40mm) length was used to prepare the specimens .The specimens were placed on the testing machine so the top and the bottom of the specimen were in contact with the steel flat rigid plates .The specimens were crushed at a loading rate of (300/50 cm2) and (5mm/min) cross head speed .The maximum load carried by each specimen was taken from a digital screen of the machine and calculation of compressive was obtained .The results for the specimen showed that the addition of different disinfectants caused reduction in strength, which found high significant effect on the compressive strength when compared with control group .


Biodentine --- push out --- MTAD --- QMix