• Bulletin of the Korean Chemical Society
• /
• 제27권9호
• /
• pp.1418-1422
• /
• 2006

In this work the construction of a novel poly(vinyl chloride) membrane sensor based on 2,2'-dianiline disulfide (DADS) as a neutral carrier, o-nitrophenyloctyl ether (NPOE) as a plasticizer and sodium tetraphenyl borate (NaTPB) as an anionic site with unique selectivity towards Tm(III) ions is reported. The electrode has a linear dynamic range between $1.0\;{\times}\;10^{-6}$ and $1.0\;{\times}\;10^{-2}$ M, with a nice Nernstian slope of 19.5 ${\pm}$ 0.3 mV per decade and a detection limit of $4.0\;{\times}\;10^{-7}$ M at the pH range of 4.8-8.5. It has a very fast response time (<15 s) in the whole concentration range, and can be used for at least 4 weeks without any considerable divergence in the electrode potentials. The proposed sensor revealed comparatively good selectivity with respect to most common metal ions, and especially lanthanide ions. It was used as an indicator electrode in the potentiometric titration of Tm(III) ions with EDTA and in direct determination of concentration of Tm(III) ions in binary mixtures. It was also applied in determination of fluoride ions in mouth wash preparations.

• Journal of Periodontal and Implant Science
• /
• 제39권sup2호
• /
• pp.239-251
• /
• 2009

Purpose: Full-mouth disinfection enables to reduce the probability of cross contamination from untreated pockets to treated ones, for completing the entire SRP under local anesthesia with chlorhexidine as a mouth wash in two visits within 24 hours. This study aimed to compare the clinical effects of modified full-mouth disinfection (Fdis) after 6 months with those of conventional SRP (cSRP). Methods: Thirty non-smoking chronic periodontitis subjects were randomly allocated two groups. The Fdis group underwent the entire SRP under local anesthesia in two visits within 24 hours, a week after receiving supragingival scaling. A chlorhexidine (0.1%) solution was used for rinsing and subgingival irrigation for Fdis. The cSRP group received SRP per quadrant under local anesthesia at one-week intervals, one week after they had received scaling. Clinical parameters were recorded at baseline, after 1, 3 and 6 months. Results: There are significant (P<0.05) decreases in the sulcus bleeding index, and plaque index, and the increases in gingival recession were significantly smaller with Fdis after six months compared with cSRP. There was significant improvement in the probing depth and clinical attachment level for initially medium-deep pockets (4-6mm) after Fdis compared with cSRP. Multi-rooted teeth showed significantly larger attachment gain up to six months after Fdis. Single-rooted teeth showed significantly more attachment gain, 1 and 6 months after Fdis. Conclusions: Fdis has more beneficial effects on reducing gingival inflammation, plaque level, probing depth, gingival recession and improving clinical attachment level over cSRP.

• 대한소아치과학회지
• /
• 제28권4호
• /
• pp.583-592
• /
• 2001

치태 억제효과가 있는 것으로 알려진 Lactococcus lactis 1370으로 제조한 양치용액이 실제 소아들의 구강내에서 치태의 형성을 억제하는지 여부와 이들 균주의 시간경과에 따른 구강내 잔류율을 알아보고자 소아 30명을 대상으로 위양치액 (Lactobacillus casei)과 유산균 양치액 (Lactococcus lactis 1370)으로 양치하도록 한 뒤 시간경과에 따른 치태지수, 치태부착면적을, 그리고 Lactococcus lactis 1370의 생균수를 count하여 다음과 같은 결과를 얻었다. 1. 대조군과 실험군에서 24시간후 치태지수는 각각 평균 2.43과 2.06으로 양치에 의해 치태지수는 평균 0.37 감소하였으며 치태형성억제율은 약 15%로 유의한 감소를 보였다 (P<0.05). 2. 48시간 후 치태지수는 대조군과 실험군에서 각각 평균 2.95와 2.17로 양치에 의해 치태지수는 평균 0.78 감소하였으며 치태형성 억제율은 약 26%로 24시간후에 비해 좀더 많은 감소를 보였다(P<0.05). 3. 대조군과 실험군에서 24시간후 치태부착면적율은 각각 평균 21.2%와 15.6%로 양치에 의해 치태부착면적율은 평균 5.63% 감소하였으며 치태형성억제율은 약 26%로 유의한 감소를 보였다(P<0.05). 4. 48시간후 치태부착면적율은 대조군과 실험군에서 각각 평균 33%와 17.8%로 양치에 의해 치태부착면적율은 평균 15.1% 감소하였으며 치태형성 억제율은 약 46%로 24시간 후에 비해 좀 더 많은 감소를 보였다(P<0.05). 5. 양치후 시간에 따른 구강내 생균수를 count한 결과 1시간 이후까지는 급격한 감소를, 3시간 후에는 약간의 감소를 보였으며 3시간부터 6시간 사이에는 약간의 증가추세를 보였다.

• Journal of Oral Medicine and Pain
• /
• 제9권1호
• /
• pp.35-42
• /
• 1984

Current therapeutic modalities for severe oral lichen planus are generally unsatisfactory. Steroid treatment of lichem planus has been reported in the dermatology literature and dental literature, but few reports mention its efficacy for oral lesions. Some cases of severe erosive oral lichen planus revealed good response to this agent. So the author report two cases of erosive oral lichen planus treated with 0.05%. Dexamethasone methyl cellulose mouth wash and two intralesional injections of Triamcinolone acetonide suspension 0.2 mls, one week apart. 1. Subjective improvement was noticed in 4-5 days by two patients. 2. Objective improvement, however, was delayed and became apparent at several weeks 3. Continued improvement was noted in all patients.

• 디지털융복합연구
• /
• 제14권10호
• /
• pp.367-373
• /
• 2016

본 연구는 클로르헥시딘 양치액과 에센셜오일 양치액의 항우식효과를 평가하고자 하였다. 총 42명의 연구대상자를 무작위로 두 군으로 나누고, 각 군의 양치액을 하루 1회 15ml씩 1주일간 사용하였다. 우식원인균 평가는 CRT bacteria kit를 사용하였고, 구강내 산생성 변화는 Cariview 검사를 시행하였으며, 4주후에 재검사를 실시하고 평가하였다. 자료분석은 PASW 18.0 프로그램을 이용하여 분석하였다. 연구결과, 구강내 산생성능은 두 구강양치액 모두 사용 전에 비해 4주후에 통계적으로 유의한 수준으로 감소하였으나 군간 차이는 없었다. 또한 MS와 LB도 구강양치액 사용후에 고위험수준이 9~15%까지 감소하여, 두 양치액 모두 우식 항균효과를 확인하였고, 특히 에센셜 오일구강양치액은 항균제의 "gold standard" 인 클로르헥시딘 양치액을 대체할 만한 항균제로 일상생활에서 사용이 간편하고 효과적인 우식 항균제로 활용할 수 있을 것이다.

• 한국지역지리학회지
• /
• 제10권1호
• /
• pp.206-214
• /
• 2004

본 연구의 목적은 정족산에 발달한 무제치 제2늪의 형성과정을 밝히는 것이다. 이를 위하여 꼭지와 곡지를 가로막은 암설지형의 형성과정을 분석하였다. 첫째, 무제치 제2늪이 발달한 곡지는 온난 습윤한 기후환경에서 절리를 따라 심층풍화 된 기반암의 풍화산물이 우세로 탈거되면서 만들어진 와지이다. 둘째, 무제치 제2늪은 플라이스토세의 최종빙기에 발달한 암괴류가 와지의 입구를 가로막음으로써 형성된 주변호소(marginal lake)가 사면에서 공급된 사력물질로 매립되면서 얕아져 수생식생이 자라게 되어 늪지로 변모하였다. 셋째, 제2늪은 늪지를 가로막은 암괴류 내의 세립 메트릭스 물질이 탈거됨으로써 점차 배수되어 육화되고 있다. 이를 지연시키기 위해서는 늪지를 가로막고 있는 암괴류 내의 빈 공간을 세립물질로 충진하여 배수를 억제하여야 한다.

• Asian Pacific Journal of Cancer Prevention
• /
• 제17권7호
• /
• pp.3611-3614
• /
• 2016

Background: Propolis based preparations have a wide range of applications in various specialties of dentistry. The aim of this clinical trial was to test the efficacy of propolis as a mouthwash in the reduction of chemotherapy induced oral mucositis (OM) in a single center. Materials and Methods: In this randomised, controlled study patients undergoing chemotherapy were included consecutively and randomised to an experimental group receiving propolis mouthwash (n = 20) and a control group receiving diluted water (n=20). Oral mucositis, erythema and eating and drink ability were assessed at baseline and after 3 and 7 days using the World Health Organization (WHO) scale and the oral mucositis assessment scale (OMAS). Results: There were significant differences in OM, wound and erythema in propolis group compared to placebo, but no significant difference in eating and drink ability. However, it was interesting that 65% of the patients in the propolis group were completely healed at day 7 of the trial. No significant adverse events were reported by the patients. Conclusions: This study found that oral care with propolis as mouthwash for patients undergoing chemotherapy is an effective intervention to improve oral health. Our findings shouldlencourage health practitioners to apply propolis mouth rinse for the oral care of patients under chemotherapy.

• 한국건강관리협회지
• /
• 제2권1호
• /
• pp.93-104
• /
• 2004

Purpose : This study was conducted to understand the health status and health behaviors of preschoolers to provide baseline data for developing health promotion programs. Method 'Parents of children attending day-care centers and guardians of preschoolers were recruited for the study. Data were collected from June to August2002 using a structured questionnaire. Result . Among 754 preschoolers, 17,3% were overweight, while 18.2% were underweight, while 15.9% and 23.2% were overweight and underweight respectively, among 85 children living with guardians. The most frequent infectious diseases that children have had previously were hand-foot-mouth disease, chicken pox, and measles. Current health conditions that children have frequently are respiratory disease and atopic dermatitis for bother groups. Only 54%-61% brush their teeth everyday at bedtime, 49%-54% wash their hands every time after returning home, 4.5%-8.8%wear bicycle helmets, 9,3%-11.1% use a child car seat, and 3.5%-8.1% eat fruits and vegetables five times a day, Children living with guardians were less likely toper form positive health behaviors compared with children in day-care centers. Conclusion 'Based on the study results, health professionals could plan and develop health promotion programs to change unhealthy behaviors of preschoolers targeting high-risk groups.

• Bulletin of the Korean Chemical Society
• /
• 제26권1호
• /
• pp.38-42
• /
• 2005

Bis(2-methylbenzaldehyde)butane-2,3-dihydrazone(TDSB) was used as new N-N Schiff's base which plays the role of an excellent ion carrier in the construction of a La(III) membrane sensor. The best performance was obtained with a membrane containing, 30% poly(vinyl chloride), 60% benzyl acetate, 6% TDSB and 4% sodium tetraphenyl borate. This sensor reveals a very good selectivity towards La(III) ions over a wide variety of cations, including alkali, alkaline earth, transition and heavy metal ions. The proposed electrode exhibits a Nernstian behavior (with slope of 19.8 mV per decade) over a wide concentration range (1.0 ${\times}$ 10$^{-5}$-1.0 ${\times}$ 10$^{-1}$ M). The detection limit of the sensor is 7.0 ${\times}$ 10$^{-6}$ M. It has a very short response time, in the whole concentration range ($\sim$5 s), and can be used for at least twelve weeks in the pH range of 3.0-9.4. The proposed sensor was successfully applied as an indicator electrode for the potentiometric titration of a La(III) solution, with EDTA. It was also successfully applied in the determination of fluoride ions in three mouth wash preparations.

• 대한간호학회지
• /
• 제34권1호
• /
• pp.182-190
• /
• 2004

Purpose: This study was conducted to understand the health status and health behaviors of preschoolers to provide baseline data for developing health promotion programs. Method: Parents of children attending day-care centers were recruited for the study. Participating day-care centers were selected using a stratified sampling method. Data was collected from June to August 2002 using a questionnaire. Result: Among 754 preschoolers, 17.3% were overweight, while 18.2% were underweight. The most frequent infectious diseases that children have had previously were hand-foot-mouth disease (20.2%) and chicken pox (18.7%). Current health conditions that children have frequently are respiratory disease (28%) and atopic dermatitis (23.8%). Only 61% brush their teeth everyday at bedtime, 54.3% wash their hands every time after returning home, 8.8% wear bicycle helmets, 9.3% use a child car seat, and 8.1% eat fruits and vegetables five times a day. Children residing in the metropolitan area were more likely to have positive health behaviors, and children of parents with an advanced college level education were more likely to have positive health behaviors than those with only a high school level education. Conclusion: Based on the study results, health professionals could plan and develop health promotion programs to change unhealthy behaviors of preschoolers targeting high-risk groups.