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Objectives: This study was carried out to investigate the effect of fluoride application after dental prophylaxis by the type of dental floss. Methods: Artificial caries lesion was made on the surface of cow's permanent teeth having sound enamel surface and vickers hardness number(VHN) was measured. Specimens were classified into APF gel group and artificial saliva group. Each group was divided into waxed floss group and unwaxed flossed group. All specimens were immersed into the artificial saliva for one minute and dental f lossing was applied to waxed or unwaxed floss. After washing and drying, APF gel groups were applied with fluoride for four minutes an d artificial saliva groups were immersed into the artificial saliva for four minutes. After treatment, specimens were measured by VHN and surface conditions of enamel were confirmed by scanning electron microscopy(SEM). Results: VHN of waxed flossing and fluoride application group increased to 6.78±2.75. VHN of unwaxed flossing and fluoride application group increased to 7.36±2.51. There was no significant difference between waxed and unwaxed groups(p>0.05). VHN of waxed flossi ng and artificial saliva group increased to 1.07±2.84. VHN of waxed flossing and artificial saliva group increased to 1.05±3.13. There was no significant difference between waxed and unwaxed groups(p>0.05). There was significant increase in VHN between waxed/unwaxed flossing and fluoride application. However, waxed/unwaxed flossing with artificial saliva showed no significant V HN increase. SEM demonstrated no residue on the enamel surface in the waxed flossing groups.

Objective: The purpose of the study is to investigate the curriculum development and operation based on national competency standard (NCS). Methods: The duty of the dental hygienist was analyzed based on DACUM by ten experts in January, 2011. The duty model of the dental hygienist was inspected after duty analysis. The subjects of choice were preventive dentistry and practice. The satisfaction with the subjects were carried out from March to June, 2015. Results: The duty analysis of dental hygienist by DACUM produced preventive dental treatment(11 tasks), oral health education(3 tasks), comprehensive dental hygiene treatment(6 tasks) and 12 categories(156 tasks). Preventive dental treatment was divided into preventive dentistry and practice, oral health education was changed into oral health education and practice, and comprehensive dental hygiene treatment was replace by comprehensive dental hygiene and practice. The contents of preventive dentistry and practice included outline, learning objective, related knowledge and self evaluation. Professional evaluation required mutual experience and evaluation of the students. The mutual evaluation of the students was 4.61±0.506(dental plaque control) and 1.80±0.316(tooth brushing). The professional evaluation was 1.73±0.274(dental plaque control) and 1.60±0.322(tooth brushing)(p

Objectives : The purpose of this study is to investigate the knowledge and attitude toward cardiopulmonary resuscitation(CPR) in some dental hygienists. Methods : A self-reported questionnaire was filled out by 207 dental hygienists in Gwangju from February to March, 2014. The questionnaire consisted of kn owledge and attitude toward CPR dental hygienists. The data were analyzed using IBM SPSS 1 9.0 program for chi-square test, independent t-test, one-way ANOVA and multiple regression analysis. Corresponding Author Myung-Ok HaDepartment of Dental HygieneGwangju Health College73 Bungmun-daero(St) 419 beon-gil(Rd) Gwangsan-guGwangju, 506-701, Korea.Tel : +82-62-958-7719 Fax : +82-62-958-7631E-mail : hamo@ghu.ac.krResults : Dental hygienists having basic life support(BLS) provider ac counted for 16.9%. CPR knowledge was 8.40 and attitude was 3.59 points. There were pos itive correlations between CPR knowledge and attitude including education, performance, and co nfidence(r=.231, r=.207, r=.377). In the regression analysis, attitude toward CPR confidence were positively associated with BLS provider certificate within two years. Conclusions : Dental hygienists had low level of knowledge and confidence toward CPR. It is important to educate BLS provider course to the dental hy gienists. Key Words : attitude, cardiopulmonary resuscitation(CPR), dental hygieni st, knowledge 색인 : 심폐소생술, 지식, 치과위생사, 태도

Objectives : The purpose of the study is to identify the efficiency of total dental care(TDC) internship program. Methods : Dental hygiene students participated in the total dental care(TDC) internship program for 4 weeks in dental clinics practice. A self-reported questionnaire was filled out from June to July in 2012. The questionnaire consisted of oral health condition and dental care services by the students, dentists, and dental hygienists after TDC internship program. Results : Satisfaction degree of the students was points. The patients satisfied with TDC internship program and it was helpful to their dental health care(4.0 points). There were significant changes in tooth brushing method, frequency and O`Leary plaque index. Satisfaction degree of the dentists was 4.09 points and that of the dental hygienists was 3.80 points. Conclusions : TDC internship program is very helpful for the students not only to play an outstanding role in their dental care activities after employment but also to establish the real identity of the dental hygienist.

Objectives : Molecular biology techniques were employed to assess diversity of bacterial in children`s dental caries. Methods : DNA of germs was extracted and the diversity of the 16S rRNA clones was analyzed by amplified rDNA restriction analysis and sequencing. The experimental samples were pit and fissure caries (PC), deep dentinal caries (DC), smooth surface caries (SC), and supragingival plaque (PQ) from 50 children of age less than 12 years old. The control group was healthy teeth supragingival plaque (HT). Thirty clones from each 16S rRNA clone library of 5 samples were randomly selected, thus a total of 150 clones were analyzed. Results : Amplified rDNA restriction analysis uncovered 18, 20, 11, 17, and 22 phylotypes from healthy teeth, pit and fissure caries, deep dentinal caries, smooth surface caries, and supragingival plaque, respectively. Sequencing analysis found the dominance of Actinomycs naeslundii and Fusobacterium nucleatum in the healthy teeth; Leptotrichia sp. in the pit and fissure caries; Actinomyces sp., Streptococcus mutans, and Rahnella aquatilis in the deep dentinal caries; Streptococcus mutans and Actinomyces sp. in the smooth surface caries; Enterobacter hormaechei and Streptococcus sanguinis in the supragingival plaque. Conclusions : Clonal analysis identified 6 phyla, 20 genera, and 51 species.

Objectives : The purpose of this study was to evaluate the effects of incremental dental care(IDC) program on kindergarten children. Methods : The subjects were 46 kindergarten children aged 6 who wished participation in IDC program during 5 weeks at oral health center in G-college from March to May, 2012. The data of subjects were examined into oral conditions such as toothbrushing method and frequency, modified O`leary plaque index and dental caries activity before and after IDC program. The collected data were analyzed by SPSS statistical package version 19.0. Results : 1. The rolling and fones methods of toothbrushing increased from 10.8% to 91.3% after IDC program(p

Objectives : This study was carried out to investigate the caries resistan t effect of fluoride by dental polishingprior to fluoride application in vitro.Methods : Artificial caries lesion was made on the surface of specimen enamel taken from cow’s permanent cus-pid on the part of labial surface after resin embedding and polishing.Artificial dental plaque was formed on the 72 dental specimen w ith 25~45 VHN(Vickers Hardness Number) whichwere divided into three groups(fluoride varnish, APF gel, contr ol) with dental polishing and without polishingrespectively.Fluoride varnish and APF gel group with 20 second polishing or without polishing were immersed in the artificialsaliva respectively.Control group with or without polishing were immersed in the artificial saliva.Results : 1. Significant difference was not found by fluoride varnish b etween polishing group and non polishinggroup (p>0.01). 1) polishing group. The changes of Vickers Hard ness Number(VHN) were 14.49±13.73. 2) non-pol-ishing group. The changes of VHN were 11.67±5.39. 2. Significan t difference was not found by APF gel betweenpolishing group and non polishing group (p>0.01). 1) polishing group. The changes of VHN were 8.48±8.37. 2)non-polishing group. The changes of VHN were 5.32±2.59.Conclusions : Showed no significant difference between polishing group and non-polishing group regardless offluoride materials (fluoride varnish, APF gel).(J Korean Soc Dent Hygiene 2012;12(1):113-122)keyword: APF gel, Dental polishing, Fluoride varnish색인: 불화물바니쉬, 산성불화인산염, 치면연마

To evaluate the laboratory remineralization effects of a dentifrice with bamboo salt and NaF on artificial caries-like enamel lesions, at both the surface and deep areas.Early dental caries lesions were formed by treating bovine enamel samples for 48 hours at 37 degrees C with a demineralization solution (pH 5.0) containing 0.1 M lactic acid, 0.2% Carbopol 907, and 50% saturated calcium phosphate tribasic. pH cycling was then performed by immersing the samples in dentifrice slurry for 2 minutes every 8 hours per day, and in demineralization solution for 4 hours and mixed saliva for the remaining time period. The mixed saliva consisted of 50% human saliva and 50% artificial saliva. The surface hardness and the level of mineral surface alterations were analyzed using a hardness tester and transversal microradiography, among negative control (fluoride free), positive control (sodium fluoride 1100 ppm, Crest Cavity Protection), and test dentifrice (3.0% bamboo salt with sodium fluoride 1,000 ppm) groups.Test and positive control groups significantly increased the level of the surface hardness and decreased mineral loss of the artificial caries-like enamel lesions compared to the negative control (P0.05). The test dentifrice also significantly decreased the lesion depth compared to the other two groups (P0.05).