• Journal of the Korean Dietetic Association
• /
• v.17 no.4
• /
• pp.364-377
• /
• 2011

This study was conducted to provide basic information on toothbrushing habits, snack intake frequency, and current dental caries in elementary school students. A total of 188 students (105 boys and 83 girls) in Changwon city participated in this study. Dental examination was conducted by two dental hygienists in July, 2010. The results were as follows. Exactly 86.2% of students were shown to have dental caries, which includes a sealant and removed teeth due to decay. The average number of teeth with dental caries per student was 3.8. Exactly 60.6% of students were shown to maintain correct toothbrushing habits to prevent dental caries, but only 12.8% brushed their teeth immediately after a meal or snack. Exactly 82.4% percent of participants received toothbrushing education, 47.1% of them received it from an expert, 43.9% received from their parents, and 28.2% used tooth paste with fluorine. Regarding snack intake frequency, ice cream was the most consumed cariogenic food and white milk was the most consumed protective food. The >=7 teeth with dental caries group consumed higher frequency of carbonated beverages intake than the 'no dental caries' group (P<0.05), and the '5~6 teeth with dental caries' group consumed higher frequency of chocolate intake than 'no dental caries' group (P<0.05).

• The Journal of Korean Academy of Prosthodontics
• /
• v.34 no.3
• /
• pp.457-463
• /
• 1996

An esthetically pleasing result in denture service is dependent upon several consideration. Esthetic considerations for the edentulous patient include tooth size, shape, arrangement, positioning, gingival contour, age, sex, personality differences, and ethnic type. Especially, the form of anterior artificial teeth is an important factor on the esthetics. The selection of artificaial teeth requires understanding and knowledge on physical and biologic factors and has to meet the indivisul esthetics and functional needs of each patient. However, the selection of artificial teeth is based on the large degree of subjective judgement of the dentist, Therefore, this is one of the most unscientific processes. Many attempts have been made to find a guideline for the selection of artificial teeth. Temperamental theory by White and Hall utillized with the physical characteristics such as body size, body form, color of eyes and hair, and disposition. SPA theory by Frush and Fisher utilized with the basis of sex, personalities, and age of the indivisual. There has not been provided for a guideline and study on the selection of artificial teeth for Koreans yet. This study was aimed to evaluate the William's typal matching theory in Koreans. 1. The facial forms of korean adult were ovoid(46.3%), square(36.7%) and tapered(17.0%) form. 2. The anatomic forms of natural maxillary incisors were ovoid(45.3%), tapered(31.3%), square(23.3%) form. 3. The forms of face and natural maxillary incisors were ovoid(21.9%), squared(11%), tapered(6.3%). 4. The natural maxillary incisors were similar in form to the facial form only in 39%. There was no correlation between the form of the face and the form of natural maxillary central inisors in Koreans. 5. Artificaial teeth which was selected according to the typal matching theory did not represent the form of the natural teeth in 61 per cents of the fatal, but it felt that they harmonized with the form of the patient's face and produced good results.

• Journal of the korean academy of Pediatric Dentistry
• /
• v.32 no.1
• /
• pp.126-131
• /
• 2005

The purpose of this study was to observe the potentiality of a mixture of antibiotics to relieve the endodontic and periapical infections in primary teeth. A mixture of metronidazole, ciprofloxacin, and minocyclin in distilled water or in a root canal sealer were used to disinfect the infected endodontic and periapical lesions. For application of this mixture, medication cavities were prepared at orifices of root canals by using the $Fissurotomy^{(R)}$ burs(S S White, USA). The cavities and bottom of pulp chamber were filled with antibiotics mixture. In this cases, clinical symptoms were improved following a single application of that mixture. Gingival swelling, pain, and fistulae were disappeared within a week. More long term evaluation will be needed. Although there were no reports of side effects, care should be taken if children are sensitive to antibiotics. Within the limitations of this case, the mixture of 3 antibiotics provided an excellent improvement in treatment of infected primary teeth under the physiologic root resorption.

• Journal of the Korea Convergence Society
• /
• v.11 no.7
• /
• pp.273-280
• /
• 2020

Upon investigating the dental health of teeth and gum, and the cleanliness of the oral cavity of female college students in the early 20's, it was reported to be that the number of cariogenic bacteria was heavily related to the acidity of saliva or ammonia. Also, cariogenic bacteria and ammonia was found out to be related with proteins (p<0.01), and ammonia, the synthetic product of cariogenic bacteria was heavily related to blood and white blood cells (p<0.01). To conclude, the healthiness of teeth was related to the acidity of saliva and ammonia, the healthiness of gum was related to blood, proteins and white blood cells while the oral hygiene was most likely to be related to ammonia. This result matched to the seven oral disease cause analyses of the saliva analysis apparatus (Sill-Ha ST-4910), which implied further utilization of this data to clinical implications. However, this study is limited to young personnel who does not have any chronic or general diseases; therefore further study is required to generalize this study.

• The Journal of the Korean dental association
• /
• v.10 no.3
• /
• pp.155-158
• /
• 1972

As a factor of dentistry, the form of the tooth especially the size plays an important part. And in orthodontics the relation between the tooth size, arch length and the basal arch is regarded important, and it is closely related to the extraction and retension probolem in treatment planning. The auther's study of the mesio-distal crown diameters of permanent teeth, width and length of the dental arch and basal arch from the cast of 50 men and 53 women who could be measured clerly, among 102 men and 107 women regarded as the normal occlusion showed the followings. 1. Table 1 and table 2 showed the measurement of the mesio-distal maximum width of the permanent teeth, width and length of the dental arch and basal arch of the upper and lower dentitions. 2. Men's mesio-distal width of the teeth, arch length and arch width of the upper and the lower dentition, basal arch width and basal arch length are larger than those of wonen's 3. We compared the Koreans with the American white. Upper central incisors, upper first molars and lower second premolars of the latter were larger than those of the former. And the Koreans's rest tooth of the rest were comparatively larger.

• Restorative Dentistry and Endodontics
• /
• v.20 no.2
• /
• pp.802-811
• /
• 1995

The purpose of this in vitro study was to compare the bleaching effect and the surface change according to three bleaching agents (Rembrandt, Natural White, Hi-Lite). Teeth were stained by artificial food colorants for 6 weeks and bleached for 4 weeks. The teeth were evaluated with spectrophotometer after bleaching on the 1st week and on the 4th week. The surface change of enamel was evaluated under SEM after exposure to 3 agents for 1 and 24 hours. The results were as follows : 1. All groups showed increased Lightness difference after bleaching. 2. After 1 week, only Rembrandt group showed significant bleaching effect compared to control group. 3. After 4 weeks, Rembrandt group and Hi-Lite group showed significant bleaching effect compared to control group. 4. SEM evaluation revealed that enamel surface underwent considerable change after 24 hours. Scratch disappeared and smooth surface was shown.

• Restorative Dentistry and Endodontics
• /
• v.34 no.2
• /
• pp.120-129
• /
• 2009

The purpose of this study was to investigate the pulpal response to direct pulp capping with dentin sialoprotein (DSP) -derived synthetic peptide in teeth of dogs, and to compare its efficacy to capping substances $Ca(OH)_2$ and white mineral trioxide aggregate (WMTA). A total of 72 teeth of 6 healthy male beagle dogs were used. The mechanically exposed pulps were capped with one of the following: (1) DSP-derived synthetic peptide (PEP group): (2) $Ca(OH)_2$ (CH group): (3) a mixture paste of peptide and $Ca(OH)_2$ (PEP+CH group): or (4) white MTA (WMTA group). The access cavity was restored with a reinforced glass ionomer cement. Two dogs were sacrificed at each pre-determined intervals (2 weeks, 1 month, and 3 months). After the specimens were prepared for standard histological processing, sections were stained with hematoxylin and eosin. Under a light microscope, inflammatory response and hard tissue formation were evaluated in a blind manner by 2 observers. In the PEP group, only 3 of 17 specimens showed hard tissue formation, indication that the DSP-derived synthetic peptide did not induce proper healing of the pulp. Compared with the CH group, the PEP group demonstrated an increased inflammatory response and poor hard tissue formation. The CH and WMTA groups showed similar results for direct pulp capping in mechanically exposed teeth of dogs.

• The Journal of the Korea Contents Association
• /
• v.13 no.10
• /
• pp.427-433
• /
• 2013

The aim of this study was to evaluate the efficacy of bleached tooth with white toothpaste on the whitening effect, microhardness test. Forty-four human interior teeth were randomly assigned to two groups as follows: Group 1 was used general toothpaste as control, Group 2 exposed to white toothpaste at 3 times a day for 3 minutes. The total application time was 4 weeks. After each application, all tooth were washed with distilled water and immersed in artificial saliva. The color change and microhardness were measured using CIELab Color system and microhardness tester. The data were analyzed by student t-test, using SPSS 20.0 statistical computer program (SPSS Inc., USA). The overall color changes (${\Delta}E$) by white toothpaste have a capability of the whitening efficacy by factor of 2.3 times larger compared with general toothpaste. Moreover, the application of white toothpaste did not cause any microhardness reduction on enamel surface.

• Journal of the korean academy of Pediatric Dentistry
• /
• v.24 no.1
• /
• pp.235-246
• /
• 1997

This study was done as a pilot study to develop a color test measuring children's dental anxiety. The subjects of study were 511 preschool children aged from 3 to 6. Caries experience was examined. Children's drawings of the dentist were collected and analyzed by the method of human figure drawing test modified by Sonnenberg and Venham. Colors of high dental anxiety level were black, brown, purple, red, yellow, pink, green, orange, blue, gray, yellow ochre, and white in that order. Colors of high frequency of use were yellow ochre, green, blue, red, orange, pink, black & purple, yellow, brown, gray, and white in that order. As the age increased, white & gray, yellow ochre, and blue increased and black, purple, and pink decreased. Boys liked green and blue, and girls liked orange and yellow. Filled teeth rate was highest in yellow ochre group and very low in black group. Children who had an educational dental visit before the test used green color more than the rest of children.

• Journal of the korean academy of Pediatric Dentistry
• /
• v.25 no.1
• /
• pp.171-184
• /
• 1998

The purpose of the study was to observe the association between the main colors of school children's drawings of dental treatment situation and their dental anxiety. The subjects of study were 688 school children from 2nd to 4th grade. Caries experience was investigated by oral examination. Questionnaire survey was done regarding children's attitude toward the dentist and dental treatment and their experience of pain and fear during the dental treatment. Colors with high frequency of use were green, blue, yellow, orange, pink, purple, gray, brown, yellow ochre, red, white, and black in order. Boys used green and blue, and girls used yellow and orange, more than each other. As the grade increased, white, yellow, and blue increased and brown decreased. Colors with high dental anxiety level were black, brown, red, white, blue, orange, yellow and green, yellow ochre, gray, pink, and purple in order, and the upper four represented 10.5% of the subjects. Children with high decayed teeth rate had a tendency to use colors of high dental anxiety level. Black color had the most obvious association with the pain and fear of dental treatment.