Background : In dentistry, level of risk on cross infection can be said very high. This is due to the teeth treatment, the operator may have direct contact with saliva and patient’s blood. The implementation of standard precautions is very important in clinical practice because in addition to it must be obeyed, it can avoid the operator and the patient to the cross infection. The purpose : To determine the relationship between knowledge and attitudes with the practices toward infection control of clinical student in dentistry. Methods : This type research analytical observasional by cross sectional study approach. The number of respondents were 61 clinical student of dentistry. The sampling technique by simple random sampling. The data collection done by providing questionnaire concerning knowledge and attitudes to clinical student of dentistry and practice observations toward infection control. Statictical analysis use chi-square. Results : There is significant relationship between the knowledge with the practices toward infection control with p=0.0005 and significant relationship between the attitudes with the practices toward infection control with p=0.023 Conclusion : High knowledge and positive attitude will be followed by good practice of control infection.                                                                                                                           Keyword : Cross infection, Knowledege, Attitude, Practice, Standard precautions

accumulation of plaque. The most simple and effective way to control plaque is tooth brushing. Manual toothbrush which is straight, straight brush handle with the brush head and bristles panel is recommended by the healthy department of Indonesia. Orthodontic toothbrush is designed specifically  to  eliminate plaque around  the  brackets.  Charter methods  is  recommended  for patient using  fixed  orthodontic appliance. Purpose: To determine the effectiveness of conventional toothbrush and orthodontic toothbrush in reducing average plaque index patient using fixed orthodontic appliance with Charter method. Methods: The research method was experimental with pre and posttest design. The study subjects were 30 people who were divided into two groups, 15 people usedconventional toothbrushes and 15 people usedorthodontic toothbrushes. Orthodontic Plaque Index (OPI) was used as plaque index in this research. Analysis of data was using T-test. Results: Pretest and posttest plaque index of conventional toothbrush were 70,94 and 40,20. Pretest and posttest plaque index of orthodontic toothbrush were 65,59 and  23,74. The average difference in  pretest and  posttest plaque index of conventional toothbrush was 30,74 and orthodontic toothbrush was 41,84. The result was tested by using independent t-test and produced a significant value (P value) of 0,001 Conclusion: The use of orthodontic toothbrush with Charter method is more effective than conventional toothbrush in removing plaque. Keywords: Plaque index, conventional toothbrush, orthodontic toothbrush

Microleakage defined as the clinically undetectable passage of bacteria, fluids, molecules or ions between a cavity wall and the restorative material. Microleakage tends to occur in Class V cavities. It is caused by  marginal adaptation  which is more difficult in class  V cavities. Microfiller composite resin is developed and indicated for areas that not require a large pressure. As the development of dental materials, it has been developed a composite resin base material that is known as resin-modified glass ionomer cement. This material has purposed to reduce the limitation of conventional glass ionomer cement and take the advantage of the composite resin material. The aim of this study was   to evaluate microleakage difference of microfiler composite resin restoration with resin-modified glass ionomer cement restorations in class V anterior teeth cavities.  The methode of this  study used experimental laboratory through in vitro process . Thirty two class V cavities were prepared on labial surfaces of extracted human anterior teeth. Samples were divided into two groups. Group I included sixteen samples that have had   restorated with microfiller composite. Group II included sixteen samples that have had restorated with resin-modified glass ionomer cement. The samples were immersed into aquabides solution for 24 hours. After that, the samples were immersed into 1% methylene blue solution for 24 hours. All samples sectioned longitudinally and analyzed for microleakage as dye penetration using a stereomicroscope. Student t-test were used for statistical analysis. The resulting data showed no significantly difference between two groups. Key Word : Microleakage, microfiller composite resin, resin-modified glass ionomer cement (RMGIC), class V cavities.

Background: In dentistry, level of risk on cross infection can be said very high. This is due to the teeth treatment, the operator may have direct contact with saliva and patient’s blood. The implementation of standard precautions is very important in clinical practice because in addition to it must be obeyed, it can avoid the operator and the patient to the cross infection. The purpose: To determine the relationship between knowledge and attitudes with the practices toward infection control of clinical student in dentistry. Methods: This type research analytical observasional by cross sectional study approach. The number of respondents were 61 clinical student of dentistry. The sampling technique by simple random sampling. The data collection done by providing questionnaire concerning knowledge and attitudes to clinical student of dentistry and practice observations toward infection control. Statictical analysis use chi-square. Results: There is significant relationship between the knowledge with the practices toward infection control with p=0.0005 and significant relationship between the attitudes with the practices toward infection control with p=0.023. Conclusion: High knowledge and positive attitude will be followed by good practice of control infection.

The impression materials that most commonly used in dentistry was alginate. Factors that must be considered was the controlled of infection transmission from alginate, it was important to do disinfection using a disinfectant solution. Alginate had imbibition properties, so that disinfection by spraying technique allowed the expansion of alginate affecting the dimensional stability of impressions. The purpose of this research was to determine the difference between the dimensional stability of alginate impression were sprayed with a solution of sodium hypochlorite 0,5% and Dettol® 5%.  The method used was an experimental laboratory with post test only control group design. 27 samples were divided into 3 groups: spraying with 0.5% sodium hypochlorite solution, spraying with 5% Dettol® solution, and spraying with aquades as a controlled. Alginate impressions were sprayed with 0,5% sodium hypochlorite solution, Dettol® 5%, and aquades then filled with gypsum, and then measured dimensional stability by using micrometer screw. Data were analyzed with the Kruskal-Wallis test.  The results showed that differences between the dimensional stability of alginate impressions were sprayed with a solution of sodium hypochlorite 0.5% and 5% Dettol® was not significant (p> 0,05).  The conclusion of this research was there was no significant difference between the alginate impressions were sprayed with a solution of sodium hypochlorite 0,5% and Dettol® 5% to dimensional stability. Keywords : dimensional stability, alginate, sprayed, sodium hypochlorite, Dettol®